Inside a Huge PCB Factory - in China

Inside a Huge PCB Factory - in China

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Circuit, boards are in just about every piece of electronics, in our lives but. How are they made and, why the heck is it so yellow in here today, we're. Gonna find out. Printed. Circuit boards or PCBs, may look really complicated but they're actually pretty simple they're, a bunch of tiny copper wires sandwiched. In between multiple. Layers of fiberglass. Now the wires are, there to connect all of the various integrated, circuits and other electronic, components, in an organized, repeatable, way to make up an electronic circuit today. We're. Gonna see how they're manufactured, I'm, here at the JL CPCB Factory, in play Joe China which, is outside of Schengen and I'm, here with Lilly who's. A technical. Support representative, that talks to engineers, all day long who, sends you design files for, PCB is to have you manufacture, them and so you know everything, about this process and you can answer any question I might ask right. Not. Every question so, you brought someone with you. Great. To have you mr. leo and you can answer any question that Lilly doesn't know the answers yeah. Great. I'm. Really excited to see this process step by step but. First we, need to rewind, a couple hours and go back to your main headquarters in, Shenzhen to see the very first step. So. We're here at your headquarters yeah. And, this is where the first stage in the process happens, right where. The very first thing, when, a when a customer, sends in their file to have a board designs it, happens here this is our, engineering. Department. This. Is where they review the design files to make sure there are no problems yeah. Yeah he's checking where, this fire, is okay for example Reza Sayah is some layer list. Whether. There has a, folder, for the fire weather, yeah whether the shooting fire is there yeah so he's just making sure that the engineer who designed this the customer didn't. Design it in a way that you can't actually manufacture, yeah, so he makes the production file and then he sends that over the Internet to the factory yeah and then the next step happens at the factory yeah right yeah, okay let's go back to the factory and see the exit okay let's go so, this. They're, printing, the design on, to, clear. Film here, Wow. So. These, now we're, gonna go see where they take this film and they, use this they use light to project this image onto, a. Board that, has some photoresist, on it that, will then expose similar, to how you would expose. A photograph, now we've got the design we need to transfer, it onto a copper, circuit board blank but. First we've got to prepare that blank so let's go see where you guys do that oh. I. Have no idea it comes this big so, we have to cut it of course, okay. So this. Is. Your, fr4. Fiberglass, yeah you. Have two coppers, on the top, and the bottom vaminos, yeah. When we remove the copper, then say yellow, yellow, pause that's the so called epithelium. Right what is your fiberglass, so that's your fiberglass, in between and, then the copper. Is our knee sandwich already glued on the outside yeah yep got it and so this, is the. Circuit board before. Anything's, been printed on it this, is the raw raw. Material, yeah that's, really cool so the next step is you cut this down you take these big sheets and you cut it right yeah oh wow. Okay. This, is crazy, this is the original size for this material and. So you're picking this up here and then this is a cutter machine here. So. It starts out as one piece here and it's getting cut down the middle by a song so, what's going on here it looks like it's. Cutting. The edges. So. Maybe man is very smooth got it so. Next what are we gonna see review see how the in in a year it's made of pressed yeah cut it and so these are the wires that run in, the middle of the board where you can't see them yeah okay so we got to put on outfits. This. Is like a proper clean room so we really don't want to damage the the, boards that are being made by right now by like bringing in too much dirt and dust yeah.

Tell. Your boss thank you for, letting us come and see the inside I've never gotten to see this, area. Are. You ready yeah, so we'll go through here. So. These are the boards that we saw yeah, been cut in the other room yeah so they have to load. Back. The joy-filled. On, homicide, and. Sigh okay so when they expose, this material, to light it gets hard and it sticks to the board and, in places where there's no life in where there's black. In the image. This. Disk, will wash off and that. Will protect the copper from. Being, dissolved. By, the alkaline, bath we're gonna see later in the process so now, that the film is on the. Blanks. We. Need to actually apply, the design right, so. She's got books like two films, there sandwich. Together. At. The same time. Oh I, see, and it's doing it behind behind there or, gets it oh I, see there's a light in the corner oh and, you could you can see the design already. So. Why. Are all, the lights of yellow in there. Because. The view, is ligh sensitive. Yeah. So we don't need allies so strong if, it if the lie is strong, then maybe the field will, be exposed, right because, the light is sensitive to blue light or that the film is sensitive to blue light and that, will make it hard and so, the yellow light doesn't affect it I understand. That. This stack of boards is ready to be developed, and they're, gonna feed it through the wall and, so. Then, that will go into the rest of the developing process yeah. Okay, so but I bet we have to take off the bunny suits and go outside to go see that okay. All right let's go all, right here we go this is like an activated, charcoal mask. This, is where we just were and. And, now, the boards are coming through that have been exposed to the light and now, they're going through the developing, process, everywhere. That there's copper, the. Copper is going to get removed so developing, over here where we wash off the excess. Photoresist. And then here is the actual etching process, and this, is like an alkaline, solution that. Removes. The copper chemically, a whole bunch of chemicals, going on here we totally can't see inside, but. When. We come out to this side. Have. A look now, where, there was copper back there there's. The yellow which. Is the fr4, right, that's. The fiberglass and. It's in that in the middle, got. It and so. Underneath this blue is, still the copper that we want to keep so, then it comes around over here then, it's yeah it says here film stripping, so that's removing, the blue now on top of the copper okay so it's a bunch of washing, and removing, oh there. We go the, blue has been removed and it just leaves the copper underneath that it was protecting, and now, we have our designing copper, so that this, is starting to look like a circuit board and.

Then. Drying, it looks like and. Then it's putting a protective, layer in between so they don't scratch each other each one of these now is a finished, inner layer is that right it's. Done, so. Next. You. Need to inspect, the, etching on the inner layer and make sure that everything is okay right this, is, very cool this is an automatic, robotic, inspection. Right you. Guys call this Aoi. Optical. Inspection, and. Then it's scanning it with like a light and a camera. It's. So, fast and so this is comparing, what the board looks like with. What, the design file is supposed to look like and so then when this is done then. This goes to be sandwiched with the with the copper on either side of it let's. Go see that this, is the clip, back we, we, call it CP we. Can see the light here, is its domain the surface may laugh we. Call it round, Tobin that put the PV to it to. Increase. The. Fighting. Boys. Binding, force let me see if I can really explain that a little bit. This. Machine, Witzel. Takes. The smooth surface, and makes, it a little bit more rough yeah so that when you put the prepreg, on there which is sort of like an epoxy glue, that. It can get, into the surface and find more and more strong. So, this is like a like, a sheet of fiberglass but, it's really thin it's flexible, and it, has an epoxy already, already. Impregnated into, it already soaked into the fabric I see and then you're gonna put this here and then we're gonna put another piece of copper and and. The sandwich oh. Wow. This. Is a huge, machine so. This copper, foil is the outside. There's. Only one worker for this whole area, could. Be one person so. That's the bottom topper now the. Prepreg, and the middle and the top. Yep and then, peepee and then another layer of copper and, then one of these metal sheets, one. Big sandwich. This. Is the room we were just in right okay. Oh and, he's about to bring some out right now oh. Oh. These. Are the board's that we just saw being stacked together I'm glad. He told me I would have gotten to run over well, let's go chase that robot cuz that's got the other stack right so, there goes the stack that that, the first stack that we made in, here is the press this is where they come next definitely, no safety rails here you just have to be standing out of the way oh. This. Is where he controls, they, do increase, the temperature. Sometime. Later. And then increase it to 200, I see, so this is the steps it goes through the basic deal is you load this in the furnace. Pressure, and heat up to 200 degrees and. You. Know 27, kgs, of pressure. That. Will melt, the epoxy, in the prepreg and stick. It to both sides and then, and then it comes out here and we can see the finish the finish yeah. Lamination, okay let's go take a look so this is what, it looks like when it's fully laminated, this is the copper wow, that is super thin, this. Is like yeah paper thickness maybe even thinner so inside, that is the inside layer that we etched and now, it's got two pieces of copper foil on the outside now. Now. It's four layer now we need to drill some holes all. The holes yeah, this, is the drill room oh my. God you guys have so many drilling machines underneath. All of this all. Of this stuff is the, circuit boards that we just saw right. And. They're in a standard why they're stacks are like three and, these are all the drill bits here yeah these machines can automatically, change what drill bit they're using yeah they they can drill all different size holes depending, on the design and, they. Just come out here and they they put. The one that they've been using and they pick up a new one and they go back in the kitchen oh it's here it's doing it it's switching heads okay switching bits so, these boards are fully drilled and Louch these.

These Are little, tiny deals there are two kinds of bowls three. Kinds of poles in, a circuit board there RVs, there's. Through-hole, and then, there's just a mechanical, hole right. Yeah, like for putting screws so. So. Those are obvious those are promoting screws and bolts and things through those are these big holes around the outside then, through holes are for putting the, legs of components, through like resistors, capacitors. Right, yeah, and then vias these, vias, are the magic that makes circuit boards work makes multi-layer. Boards work when you've got wires on the top of your board and wires on the bottom of the board the, vias are what connect those two sets of wires together so, you drill a really tiny hole and then, you have to send two late. Copper, in, that hole so that it connects the two yeah, I can't, believe how big this drill operation, is so how many heads is this this is one, two three four five six, heads yeah, so they're all doing the same thing the whole time and. They're all working on their own stacks, of boards which, all have to be perfectly, aligned to each other so next, we'll go see plating, where. Where we actually put copper back in the holes okay. So, this is a copper, plating, process. Where. Every pole, has copper plated, on the inside this. Is a chemical process that I don't fully, understand, if you're a chemist and you, understand this process better than I do leave a comment in the comments and I'll make, sure it gets visible, I'm not sure I fully understand, what all is going on here, but. The. Important takeaway is. That we're putting copper in the holes. So, we talked to mr. Vieau and. It turns out we only saw half the process. This. Is the other half before we it was doing copper plating, but it was just putting a really thin layer. Right. Not thick enough for soldering and for oh you know electricity to flow through. Right. So this is an electroplating, line, but but in. Order to electroplate, you actually need to be able to run electrical current through it and the, first step gave us enough copper to be able to do this and then this will grow. The thickness of the copper in those holes. So. Now we're back in, the dark room. And this time we're putting the traces, on the outside of the board right. Okay so this process is exactly, the same as what we saw for the inside layers so. Let's go ahead and just skip ahead to the next step. So. This is a why again we saw Aoi for. The inner layer. Are. These, machines on any different than the ones downstairs. Same. Exact thing so, this. Is where. You apply the solder mask which, gives circuit boards that unique, green color yeah right so far they've been yellow turning.

Them Green you can do other colors too but green is what, everybody thinks of when they think of soluble. Yeah. It's. Liquid solder mask and. Your, squeegee aiming it on with these sweeties it. Goes back and forth so we're putting it everywhere here, and then in the next step we're gonna remove some of it yeah on, this machine, we're, only soldering, or or only putting solder mask on one side of the board right yeah but we want it on both sides okay. Right. Okay, so. Let's go down here oh I, see so you've got two machines that are exactly the same oh and, you've got you've, got a robot arm that, flips it over in the middle that is, super cool and then, next where do we go we. Have to make. Giant. So, you've got these big industrial dryers. Here, oh I, see, okay so all the board's are vertically, stacked up here yeah, it is, a jointer. That just makes the solder mask kind. Of tacky dry, so that it doesn't run off so. Next, we. Need to go see how we remove, the solder mask off the pads where we don't want it they, cover the, field, on. This, PCB the fil have the openings. For, the. That, means with. Me to remove, these. Films that printed out the same way to put the film as we saw for the traces yeah and, anywhere, there's black. Yes solder mask is gonna be ruined they put black where there are pads or, other things where we don't want Tata mask to, stick yeah, so he's taking boards that have, solder mask everywhere and he's putting the films on, both sides yeah so. I think this. Solder mask is UV. Curable, UV. Light and, so. When you expose this solder mask to UV light it. Makes it hard and. So. What that's what this bright, purple light is over here is a. UV light we're, just hearing the. Solder mask everywhere. That the the film, is clear and, anywhere it's black it's, it's staying uncured, and then. We can wash it off. That's. The washing line in there. This. Is the other side of the clean room where the boards were going into the wall. Come. Out in here and this looks just like the developing, line that, we saw on the in the etching process, right. So it's basically, just water, sprayers, that are moving back and forth and and spraying, off all the excess solder mask right that the solder mask that didn't get hardened by the light so we can see here, the, boards, are, have.

The Solder mask removed, from the pad so we can see the copper pads. That's. Awesome, now it's. Time to put some markings, on these boards this. Is. Your. Silkscreen, process and this, is just. What you would expect this, looks exactly like a t-shirt silkscreen. Yeah, it's a big frame and it's, got a piece of silk stretched in the middle and then. On there. Is the design, from. The design files of where, the. Engineer, has, drawn silkscreen, why do engineers, put a silkscreen on the board. Their. Logos. Maybe. Or. Special. Yeah. So they'll put text that says like what each component is. Alignment. Lines for, where where components, are should be on the board it's, purely for humans, right it has no electrical, purpose but, it's usually for humans to know what goes where how should it be aligned, logos. Part. Numbers things like that and in your life now, this is not the only way you do this you. Have a different machine so. This looks like a giant, inkjet. Printer like. What you would have at home, but. Maybe. With a UV, cured, looks. Like a UV cured. Inkjet. Printer why, do you use, the, old method at all why not do it all with this machine it's, only. The, quantity. It's twice more ah they, think that bitch won it's much. Lower, event, fashi time I understand. So, if they only have a few they, use the slower machine that. Doesn't require making silk screens but, if they're gonna make a lot then. It's worth making a silk screen and they can do it much faster so now we've got all the labels and the outlines, printed, on our board let's. Go see the next step the boards are coming out of the. Ovens that that, finishes the globe strand makes it hard and now. They're coming into surface treatment a service treatment on the copper that makes it easier to solder right. So it makes it perfectly flat and, and. Makes the solder stick better so, there's, a couple different options here, but this one is called hassle, hot. Air service, leveling right. Wow. So. The board is tipping down into the liquid solder. And. Then they pull it out and there's there's hot air blades, that blow. Off all the all the excess you, can tell it. Goes in copper, and it comes out silver. Okay. So. This, looks like the drill machines we saw before we're not drilling holes anymore right. On. One big panel. So. We have to cut out each PCB. According. To the shape the designer. Specified. Drew, these are basically cutting bits that are cutting around the, edges of each circuit board, so. What is this room. Okay. So this is related to what we just saw cutting. Out the profiles but it's a little different. Before. We, go. Our. Tennessee so each of these is a separate board right. But they receive it like this they'll, place all their components, on there in, their pick and place machine or, whatever and. Then, snap, it apart okay. So the V score here this machine makes. That makes that scoring cut so that it's easy to break it he's, getting a stack ready to go into the machine here oh. Wow. That's so fast. We. Have our finished boards we're done right no we have to test whether the. PCB. Is all okay. And. That's. The most important part right we, have to make sure that the things that should connect do connect and the things that shouldn't connect don't, connect so this is your, a testing room if. We, use flying, poke passing, this is one of my favorite machines in a PCB Factory they've, got little tiny. Needles. On the end of these arms, right and those, touch each of the pads on the, circuit board where, a component, is going to be soldered down. So. They're testing the, electrical. Connection, between, two, arbitrary pads, right. And the computer, knows. Where all of the pads should be because, it has the design and, it knows what should connect together and what shouldn't connect together and it, tests all of the combinations, of that one by one yeah, that's, amazing. Finally. Though. We. Have finished, circuit boards here, fully. Tested, wholly, manufactured. And ready to go to the customer yeah. So what's the last step. Packaging. And shipping so. This is a an, example ready, to ship it's got a label on it yeah ready, to go out to the customers once it's all packed up and ready to go it, gets shipped out to the customer so gets packing labels and and, on. Its way and. So how long we've, seen this whole process this is the very last step of shipping out to a customer how, long from, when the customer, submits their design until. It gets shipped out. When. It's, put into production. Is. It maybe four, hours four. Hours not, so, fast. Yeah so, in the u.s. sometimes. Weeks, is typical, or to, wait from the time that you submit your order to the time that it's ready to ship I know you have. Customers. In the US and Europe how long does it typically take for, shipping on top of that. DHL. Shipping three days so you're looking at you, know four days from the time you submit your file to the time you have your boards yeah four days that's pretty darn fast well.

I Think that about does it for this time I really. Enjoyed that I enjoyed seeing the full process I think, I had a couple interesting takeaways, from that I think. The biggest one was just how complex, this process is there, are so many steps and you have so many different boards, so many different designs flowing, through your Factory it's. Amazing, that you guys keep all of this straight that you keep track of whose orders or what and there. Are so many details you have to get right there's there's keeping things aligned, and keeping things clean I'm so, impressed I, hope. You guys enjoyed, this. To her as much as I did I wanted, to thank jlc PCD for sponsoring, this video and making it possible but more importantly I wanted to thank you guys for, giving me such deep. Access to your factory such complete access you, in particular mr. leo have been very accommodating and letting us go into all of the clean rooms and, see all of the different areas it, makes a big difference and Lily, and mr. Leo thank you so much for taking the time to show me around and the rest of your team I really. Appreciate it if, you guys want to learn more about jlc PCB and their capabilities, and, eventually. Order a board. Design and have them manufacture, it you can find a link to their website in the description below, I hope you guys enjoyed this factory tour I want to do a lot more of them this year so, leave, a comment below with what factories, you'd like me to go see and I'll see what I can do but. For now i'm scottie from strange parts if, you enjoyed this video hit that subscribe button down below and hit. That Bell icon next to it if you want to be notified about every video I upload but. For now stay, tuned for more adventures I'll see you next time.

2018-06-17 00:26

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This video is because of you! I went through all of the comments from the previous factory videos, and seeing inside a PCB factory was one of your top requests. So keep the suggestions coming! I'll try and make as many of them happen as I can.

i want to inside a battery factory

Strange Parts how about inside a factory where they make cases or enclosures for different electronic products. Since PCB has been covered already, it would make sense to look at the enclosure factory too, don't you think?

Very interesting. Great production process details. Thanks a lot for this upload.

You guys are dorks, just make love already!

Please visit a drone factory, thanks!

most insightful video since the iphone one :D

wonderful video again. pls keep going...

Communism ...

You're as happy as a kid in a toy shop!

What about ASML.. machines to make chips.

Asrock/Asus boards? Ancillary: How a circuit board designer does what they do. How, where, what, why.

I love myster Lyou

It seems that many electronics innovations were made in China since the 80s? Modern techniques and manufacturing machines that underlie any PCB nowadays. China doesn't get any credit on the innovation front so I guess it would be cool if you can talk about how electronics have come along and where the different innovations came from.

this is AWESOME!

Your video quality has skyrocketed, nice job, only thing i would criticize is that you should have informed yourself in detail about the manufacture steps, since lillys limited english wasnt able to explain it to us very well, other than that Hats off to jlc pcb

Last time it took 2 days to receive the package from them (EU). It's so cool.

It's cool to see things being made in China, how about finding a factory in the US that makes electrical components here so we can see the differences between how things are done in different parts of the world. I bet we are slower lol.

Absolutely love these videos, I designed some boards back in the 90s and getting one was a long wait and with no design checking, of course I messed up and the only solution was to hack with wire. You’ve really got to respect the whole manufacturing process these guys have..

thanks for making my request come true

I would love to see one of these medium or smaller electronics factories, from proto and setup to product - maybe like a production run of a smalltime smartphone or tablet - kinda like a clone factory, but something easier to facilitate.. (?)

So good, thank you!

Strange Parts i see u changed ur video style. Hope next u can use gimble camera rig for the moving shot. Nice

Intel's prosessor factory

His enthusiasm is what makes me click the videos!

Chetan A basically it's a QA machine

Ashish Rrr Yeah if I'm not mistaken jlcp does do complete PCB with components

TVs and Displays factories like TCL or Samsung or something. I'd be interested in watching that!

I’d love for you to show the process to reverse engineer a part to cad file for 3D printing. I’m currently looking into it for a discontinued car part and I’d love some sort of video of the process. If your interested Scotty, let me know!

Car assembling factory is pretty intresting. I got the chance to visit one in Hungary. But I am not sure how open they are for the camera.

Was this filmed on the 11th June by any chance? I had an order in production with JLCPCB at the time and I *think* I saw my board design for a couple of frames, but it's too quick to be sure... great video and awesome to see how they do it though.

Strange Parts Passive income online

did you sex her tho?

It was mostly me re-explaining things she said less concisely in segments we cut for time/clarity. Definitely something I need to work more on in the future for this type of video. I'm still learning how to make this part work well on camera...

Strange Parts How Lazer and other printers are made?

Can you saw us how TV's are made????


it's like.... all the info that the female rep could be giving us, he already took and is just repeating back to her.. yeah yeah yes yeah if you already know the all the info, why ask for the reps to tag along ?

Strange Parts And then towards the end the girl was like.... are you done seeing and talking everything? .. Now are you going to do the favor of asking me out already?? :|

I couldn't tell if you were explaining the concepts/steps to the lady, or if you were asking her questions in the form of a statement, or if you were verifying information that she told you in a segment that was cut. That was super weird. Cool video though.

Noah Leigh It's China. The first thing they try to do with waste is sell it. If they can get money off of it, they will. If no one wants it, they just throw it out. China "doesn't have" all the EPA laws that the rest of the civilized world does.

He's just a polite person, she was just agreeing to anything he was seeing, but that's why people are willing to open the doors of their factories to him, because he knows what the word "respect" means.

Really true.

I loved this! I had an idea of how circuit boards were made, but this style, this format, is both entertaining and informative. Moooooar!

An LCD factory would be cool to see.

Just amazing...

Strange Parts just amazing!! this is a really greatt huge video man! thanks for it!!

Come on try to into Qualcomm headquarters.

If you don't understand the process then ask her instead of asking your viewers. She is standing right next to you to answer your questions.

Strange parts i don't know you need that woman to explain but you were explaining to her as if you were working there.

A vacuum tube factory would be really cool.

Great job man!!! Now I'd like really would like to see a factory that makes DRAM chips (like the one you changed on your iPhone). We hear all days there is DRAM shortage, now let's also see how it's made! :D I know maybe this would be super hard since not many companies make it, but you have already made us dream with your videos showing what nobody else shows, so... Maybe hard, but definitely not impossible for you!

Strange Parts how about after the PCB'S on the motherboard what happens After the customer gets his products shipped.

Next time let her explain in Chinese language.. I kinda feel bad to her, for not able to explain properly about all of the process..

"I'm not sure how this process works, but I'm standing next to a couple of people who do... Anyways if you know how it works, please tell me in the comments below. Moving on..."

I posted this idea in your "Inside a Chinese 3D Printing Factory - in Shenzhen, China" video so I might have some credit in making this video come true too LOL. Next stop, try JD's or Ali's automated delivery sites please!

Big Thanks to you to make my wish come true. I have been using JLC's board for some time and it's quite amazing to see how they were actually born. JLC's staffs are quite cooperative and helpful throughout the production process. Recommended!

Let her speak jesus christ!

español :(


Please GO TO a Pick and Place FACTORY!!

PCB Assembly video! I've been ordering PCBs from JLCPCB for awhile now, they're great! Shout out to Sophie Liang!

Yaqub Ilham oneplus 6 is made by Foxconn ;)

I just had a techno-orgasm! FANTASTIC VIDEO!

Whats the production rate of a factory like this?

Strange Parts I didn't see any such comments in your previous video,of course this is a sponsored video .

Great Video!

Now that we've had PCB's it would be interesting to see how actual components are made, from THT resistors to SMD IC's and everything between :)

Apple doesnt have a factory. it's completely outsourced to foxconn and company's alike. they won't let you into their factory thats for sure.

Scottie you need to pitch some content to TV stations. I coukid totally see you doing your own strange parts TV show.

anyone counted how often he said: got it ? - man i love your videos please do twitch live streams so i can support more

You should change to "This video is strange because of you!" :-)

Hi Scotty , thanks for d tour of the PCB factory, I didn't knew it had to go through that process

Modeltrain factory :)

Thanks mate, your enthusiasm seeps through - more of this style of vid pls!

Apple factory next plssss

dude i loved the continuity checking machine just epic manual is just so stone age compared to it

You videos are incredible! i found you through your Mumbai thief's market video and have been hooked since. Much love from Denmark!

please visit some solar panel factories bro

this video so large i forgot if talked about how they never confuse with different pcb designs in any stage of drilling naming etc

after watching it happen by hand so many times this automation scale is really interesting to see

i'm full thanks for the lunch

+Strange Parts Awesome channel with an even more awesome Logo design. Come far with no sponsors as far as I can tell. I think it would be great to show how various components, circuits, transistors gets put on boards of different types of electronics (Mobile Phones, Laptop, Monitors, Desktops, ect.). It would be cool to tour factories and how they build various electronics like Apple because you are so familiar their products but also other electronics (Mobile Phones, Laptop, Monitors, Desktops, ect.) and how they are designed and built. As well, I think it would be great If you could tour places like Xiaomi (Mi for short internationally) to see how they make electronics Xiaomi (Laptops, Charging Banks, CPU's), or ZTE (ZhongXing) in ShenZhen and see how they make Smartphones, or Huawei as well.

that was a great video, but here is a suggestion. even you sometimes have troubles understanding chinese people talking english right away, plus there is a lot of noise. so it would be great to see subs in your future videos

Its wonderfull to see you evolve from someone enthousiastic about a specific subject to becoming a true ambassador and fluent presenter of very complicated subjects.

i really enjoyed the video..please show us a factory tour video on flexible displays.. :-)


I really enjoy your videos, not only are they incredibly entertaining, you're also a brilliant creator and you're so positive and genuinely kind. I look forward to your future videos! Thanks!!


Kg's of pressure?

I would be very interested to learn how these factories deal with the waste products that come from so many steps in the process! The alkaline baths, the solder mask, the fiberglass particles that get drilled off... What happens to all that material?

I appreciate your hardwork...& i am an electronics engineering student...i have seen all of your videos..all the videos that you have made are awsome..keep it up..with lots and lots of love and respect for you from india keep doing more and more nice videos brother

Awesome content as always. Love your vids. Congrats on 777k subs lol.

Hi, make a video of how various components are fitted on pcb.

smartphone factory would be great

Goddanm that was impressive.. The sheer scale of their operation is insane. Amazing video.

Or a mikrocontroller factory

I would love to see how Displays are made :) awesome videos btw

Untold amounts of passion coming from Scotty. Love it. Potential Youtuber of the year right here!

I am amased. This is another level documentary. Good job.Leveling up.

I love the smell of photoresist in the morning!

This is awesome! Thank you for sharing your experience with us! :)

Thanks you for this great videos. I didn't imagine that the process was so complex !

Its totally using I.Cs they will still use capacitors, resistors and diodes. This factory is fully automated.

I've ordered many pcbs for JLCPCB. Thank you for this video...

Nice business model you've worked out. Get factories to sponsor your trips. Good one.

i like how she just say yep yeah yep yep and his just explaning everything like his he knows everything then the girl is like why tf do you need me when you almost knows everything

No big brand makes the product themselves anymore.That includes the Laptop brands like toshiba, sony etc.All are contract manufactured.All that the brands do is marketing advertising and warehousing. Thats it.

A PCB, which is the heart of any electronic gadget is dirt cheap to produce. Maybe a couple of dollars at most.The most expensive part is the screen and battery. A mobile phone costs $ 10 to make. Really, its that cheap.

Electronic PCB making is a lot like Screen Printing. Im surprised they are using film for every blank pcb.I would've thought the laser is is doing the exposing part...but no, its still the positive film which is doing it.

Hi, I'm not a chemist but since I've worked in a PCB factory a while ago I know that they use a solution that has copper in it and it has positive electric charge and also they connect the pcb fiber glass part to negative electrodes so the tiny cooper particles in the soulution will bind to the pcb

As a retired PCB Engineer you got everything correct. I don't see any changes since I retired in 1985. Just more automation

Amazing piece of content.

Could you do the next step of the process? A factory that adds the components to the boards? Or maybe the step before, where you see an engineer design the boards?

Can you make a psp ?

Got my first PCB from JLCPCB yesterday, awesome quality und super fast delivery! Got a 4 Layer PCB within 6 days to germany :) This makes prototyping sooo much faster and cheaper for my company!

This is LETGIT

keep them coming

Ohh my god I love JLC PCB recently I received circuit boards and spare parts from JLC PCB..I am wondering about their service and product quality. 1000% of excellency in their works..Thank you so much dear for making such a video about JLC PCB.

excellent video, impressive factory.

Electric bike factoru :D ,

Wow this is amazing- thank you for getting a tour of this facility!! I'm blown away by the level of automation achieved by these factories, there are clearly some talented/hard working equipment engineers who are developing these processes. Such a cool a video :D

So we went there with our technologies, we built factories, taught them how to do it, turned our factories into warehouses, which we are now closing, as it becomes cheaper to ship directly.. and now they are teaching us technologies we.. forgot? Oh, no.. we didn't, she just pretends that she knows, he pretends that he's asking.. while he's explaining.. Man, I'm lost with it.

Your videos are so good....and the editing is getting better and better..

Lily is like: how do this guy know so much?

A well made video and a very interesting factory!

He is doing all the explanations. She just says yeah.

I used to work for an electronics manufacturing company a few years back. At the time all of our pcbs were purchased from companies in the US, however our purchasing department started outsourcing pcbs to companies in China. I can tell you from experience that there was no end of problems with quality of the stuff coming from China. - Starting with their lack of understanding of design standards. There seemed to be a lot of misinterpretation of basic manufacturing standards. I'm not referring to the actual engineering design that we would send them, but rather the manufacturing specs. - They always seemed to be on the low side of tolerances. Now that didn't always cause a problem but every once in a while it did create problems with designs that might have been borderline or with stack up. - They had very poor quality control standards. It seems their level of quality control depended upon what we insisted on. And when there was a problem, it was a hassle trying to deal with the factory do to the time difference. Hopefully things are different now.

That girl is so cute.

I get my hobby boards manufactured by this company. 4-6 days from submitting my files to delivery at my front door. And at US$0.20 cents per board. Fantastic service.

So does the factory use a licensed CAM 350 software? I am a Chinese, but infringing US's intellectual property isn't a proper business conduct.

another hole is for isolating high voltage.

Wait, I'm so confused who the host and who the guest is...

Felt like you were giving her the tour lmao

I am not sure how JLCPCB plates copper on their boards, but we've done this in our laboratory. Please research the process thoroughly if you attempt it, it uses toxic chemicals, especially formaldehyde. There are two steps: first electroless plating, then electroplating afterwards. I can explain how we electroless plate our 3-D printed parts. First they must be cleaned thoroughly, which for example can be done by using sodium hydroxide. Then the surface must be made hydrophilic by oxidation. We use hydrogen peroxide or sodium percarbonate for this, others use ammonium persulfate. Then we have to put a catalytic layer so that copper deposits on the surface. We use colloidal silver as our catalyst, which is deposited by alternately dipping in silver nitrate and tin (II) chloride. Then electroless plating is performed, with a mixture of EDTA as a chelator, triethanolamine as chelator and buffer, sodium hydroxide, copper sulfate, and formaldehyde as the reducing agent with the solution maintained at pH of 11 and at 50-60 C. Then the part is electroplated, which uses dissolved copper in an acidic solution, with copper sulfate, acetic acid, citric acid, and a few other chemicals that act to make the electroless deposition smoother, more even, and shinier. Then it is dipped in a protective solution like benzotriazole to prevent corrosion on the surface. The process we used is for an academic laboratory, so its likely JLCPCB's is more suited for mass production and not like the one I've described.

JLCPCB is doing a fantastic job. Delivering a quality product at a low cost. In emerging countries like mine, the lack of suppliers means that we are left without many options. Not long ago I made my printed circuit boards with pen and iron perchloride. Horrible results. After the easyEDA/jlcpcb I can even commercialize the boards that I designed. That's awesome.

You were on a tour with the person who worked there. Why would you ask us for something you didn't understand in the comment section at first rather than ask her? It's becoming more like you gave her a tour about the fabrication haha

She didn't know either, and Mr. Liu had left us to our own devices at that point.

Put copper in her hole xD

Nailed it. I went on a Shenzhen pcb factory tour last November. Strangely, they took us through in reverse and began with packaging, working backwards to file inspections. I have designed more than 400 different pcbs over the years and have seen tooling costs fall to about 15% of what they were in the early 80's. Mostly we now allow 5 days for manufacture and 5 days for freight, otherwise the price creeps up unnecessarily. Well done video. Great production values.

You know what I want to see... Solar Panels, or Batteries, to show how nasty that stuff is on the manufacturing side of things. Just so people realize it's not all sun and flowers powering their ride to Starbucks...

the best vias technique is still a big secret

youre like a louder, more intellectual Conan O'Brien

Thanks Again! I would also like to see some personal interviews as well. She did a great job of giving you a tour, but I'd like to hear stuff about where she learned English, what kind of business owners she deals with (good, or bad). Like the guy in Dubai with the antique cameras sharing his family history :)

When india have this?

I worked for 10 years at Burroughs/Unisys Corp. making PCBs in a plant in Carlsbad, CA (it is no longer there). Except for the enclosed high-tech aspects, it was basically the same exact steps back in 1979! We were more industrial in nature so only the Imaging Room (where the masks were created) were "clean-ish...had to wear smock & hair nets. A lot of the steps required hand-transporting rather than conveyor lines. We had a huge line to plate the Copper, Nickel, and Tin on the boards...the 700 line (The Baker Line)...huge gantries and computer controlled! Such great memories...thanks for the video! -) TQQdles™


This guy is a little hard to watch

Great video. Just Subscribed!

jlcpcb is the next squarespace. every tech youtuber is sponsored by them

the girl only know how to say "yaa" "hmmm" Is her ability to speak broken or something?

Right, but Americans, in general, speak no other languages. I'd be happy speaking broken Chinese!

you can see her getting less and less interested in doing this as he keeps yammering. started out laughing, ended up with ya, ya, and polite nods LOL he is annoying


Pretty much very awesome to see this, you are a lucky guy seeing this kind of manufacturing.

Solar Panels factory would be nice ! there a bunch near your location i think.

Amazing! just mind blowing Scotty ! i'm seeing how you work with your videos and edits, and pal, you are doing great work! loved the PCB factory


Supert cool

Amazing - thanks a lot for this tour

*IN CHINA* "Why is it so yellow in here?"

It's UV light used to shine on the boards. So nothing at the blue end of the spectrum.

"Wow, wow, amazing, wow". Not for "dummies", for really dumbs.

Oh hell yes! PCB plants are amazing! Kind of like getting your drivers licence and a car, and suddenly having the ability to go literally anywhere, but for creatives, and the doors to potentially create anything have just been opened. It's that big a deal. Short turnaround PCB manufacturing is what is putting the makerscene on the forefront, and competing with turnkey. It's 2018 and there is literally no eason not to have anything in your life not custom, handbuilt, utilising your own hard earned knowledge.

He's like the Steve Irwin of How it's Made

Great video. I ordered 40 small PCBs (inc two designs) from them a month ago and took the cheapest delivery option. They took less than two weeks to get to me (UK) and cost less than £10 total delivered!

It's funny, I started designing simple PCB's to create a SLA printer from spare 3D printer parts, and projectors, so his last few vids (which I've watched in the last few hours!) have hit home. Lots of youtube 4 layer PCB vids digested :)

This video was quite the eye opener. I lost my job because it went to China.Because of my technical background, I can tell you do not understand electronic development nor the process of manufacture. Nor do you understandthe impact of sending thousands of jobs oversea to increase corporate profit.. The ultimate goal of any company or individual is profit. Some would say,yes, so what. That's the way the world works and always has. But, put yourself in my shoes. An exemplary employee, loosing my job, family, homeand belongings.    Let me educate you. The design files are not designed/conceived in China.Other countries oversea them. They do not ( yet ) have the design skills tocreate. Very insulting to see your joy in thousands of skilled job loss. HMMMMMaybe a huge tariff is justified, if you haven't earned your way.   I only read a few comments, but it was sickening to me. Everyone so happy,everyone who didn't earn their place in the conception or development process.Without the West handing you everything on a silver plater, you'd be sweepingstreets.   I know this because I was a victim of cooperate greed. Beware, companies will move their production anywhere it's cheaper. I was overly confident too.Rated #1 several times, but if the same thing can be done cheaper, elsewhere,they'll move it. From a business perspective, it's the right thing to do.    My suggestion to China or any other country is, save your money. They'll leaveyou in an instant if they can get it done cheaper elsewhere. But don't be sador disheartened, you did a good job. It's about money and those at the top.Governments aren't necessarily to blame either.    I was so sad to see many misplaced joy in the comments glorifying corporations who are abusing the Chinese workers. They already work for less than anybody else. Maybe worldwide unions are needed.

When and why did he start to speak so freaking loud? Generic Youtube behavior

No, loud factory. He'll learn to trust the mic levels. Like... Nascar announcers ;)

Dude talks too much and too loud and doesn't let cute Lilly get out more than a "yeah" before cutting her off. Man, slow down!

Can you get at Foxconn?

I always wonder how someone got the idea of how to make something (like this factory are making PCB), and also how they found a way to construct the machines and software that drives the factory. It's really cool

That poor girl didnt had a chance to say anything. Have some respect for Asian people. You are a quest, not the director ceo. You only watch , and keep your mouth shut.

Incredibly detailed and informative factory tour, this was so damn interesting! This was so professionally edited and produced i really start to love this channel :) big thanks for this again, amazing journey through the factory!

You are my best channel.

omg this dude it's so rude!

Wow! =O

It's looks like so unreal....these people are amazing...wonderful video

What's the point of having Lily just saying "yeah" all the time in the video?

looks like you all ready knew every tying and you were teaching the lady

If this company would make circuit boards for nad 3020 amplifiers,they will make a killing

Great video

Oh man, I used to work at a PCB factory in Shenzhen.

Go to a CPU manufacturing plant.

She totally had no idea what he was saying most of the time.

Edward: I think, she understand.

super vidéo !! next time a battery factory

Plss make your own mother board from scratch

Does your component fit Lilly's PCB?

You should have gone to a PCP factory. Would have gotten wild.

Please don't put your PP into weird machines.

I think it would be cool if he did a iPhone USB C conversation kit, kinda like the headphone jack mod. Don’t know how possible this is.

so awesome and thorough.

167 time Yia , but i am not sure i am right , Is there somebody can help me correct it ?

Love There

Is she giving you a tour or are you giving her a tour? Haha :D fascinating factory, great video, documentary level!

I imagine that the factory representative explains each step to the visitor, and then he repeats a more succinct version to camera, and that's the one we see.

cool vídeo thank you

The girl dont know wat they doing .... yah yah yaaaaah yah yaaah hmm damn

Why you know more info than her?

Lily needed an orgasm. I hope you obliged.


I have a suggestion for the next vid. Why dont you step back and let the company you visit explain how things work.

I love to know the names of the machines and where to buy them.

Nice open toe heels in a factory!

Do you speak english ? Yeah

This was amazing. I do agree with the rest of the comments! Keep up the good work! I love your channel!!!

Wow that's amazing!

thank you it's step by step, not 100% clear but it's more than usual!

Incredible video! Many thanks! Keep on doing these videos

This is why China is the next world power.

No big deal. I have worked with a CNC machine that can make a circuit board without this process. The machine was German made.

Only an idiot would say wow to that!

It doesn't make sense. Leo or in Chinese, the correct spelling would be lio. Leo is Lion in Latin and I don't know what Lion is in Chinese.

Let me guess, Foxcon?

nice video


Wow, really great video, it was really nice of then to allow you to visit the factory, I have always been curious as to how all these process worked... Now, about Lilly and some comments I've seen here, she is a really cute and kind girl, very caring, I bet she was there, more to tell him where to go or not go, than to do all the explanations, it's obvious that she understands the process, and she gets what he is talking about when she sometimes intervene to correct or complement him, or to just answer some question, so for all of you who thinks it's funny all the times she said "yeah", or when she tried to explain things and got a little stuck, try learning all this technical terms in mandarim, and then try your luck explaining all of it in a fast pace, while speaking in a language other then your own. Once again, really cool video dude.

Some things help me learn somethings because my knowledge is .......... or other are smarter than me

Great tour you gave the Chinese lady!

I always wished to work there

I only watched this to learn how to fill the vias...... and this idiot couldn't figure it out ???? :-)

Scotty: Motoring throughout the video.. Lily: Yeah...!!

While I was watching this video,there was a PCB manufatoring ad


would be interested to see an electric motor winding machine, a wave solderer, lcd screen production, anything about electronics production really, but especially the industrial machines which make the world (sorry people, you're cool too

Could you see about a tour of the DJI drone manufacturing facility in Szenchen?


Aw man we need to start learning chinese

I was surprised how many phases there was to make a PCB board!

I want more Lily for future videos

Man, let her talk!! Haha

Ela tá tão na sua! :3

You were so excited in this video! Great to see your enthusiasm!

"flying probe" not "flying poke" but very nice, thank you Scott


Could you do a video on the tools and setup you have?

Take a shot evrytime she says yeah

Television is doomed it cant do this quality of content. Amazing.

Dude i love your videos, and the quality of the content/editing is rising up in every video that you upload. You should be fulltime youtuber. Keet up the good work!!! cheers from Chile!.

A really informative video, but it seemed as though you were giving her a tour instead of the other way round! Even though you know how the process works, you should have asked about each step and got a thorough and open-ended response.

Yeah! Yeah! é claro que ela ia responder isso ele ja falou tudo, chato... Deixa o funcionario explicar. Good video


Thank you so much for such a detailed factory tour. It was awesome !

Holy crap! This was amazing! Thank you for giving us a peak inside this other world!

They still use Windows XP for those machines


If I got dollar for every "yeah" they said in this video, I would be a millionaire.

Great tour and narrative. The budget for an infomercial is usually > $50k, these guys owe you big time! I've been to many electronics companies in China, have emails daily and conference calls several times a week. This video would be unwatchable and the narration unintelligible without Scotty. To all, not only did Scotty do a great job of narration, but organizing and editing. It's not that the Chinese do not have great English skills, but even in Chinese, the descriptions and explanations are very poor. While there are translators and narrators readily available, their usefulness in technical fields is equally poor. Scotty already knows how PCBs are made, which allowed him to make this great video. There are many schools in China, to teach English. They all insist on "native speakers", i.e. foreigners, for teachers. Chinese companies relying on exports should hire native speakers, very knowledgeable in the subject, to make their videos and manuals. It took the Japanese over 10 - 20 years to learn this and become the huge success "Japan Inc" became.

nicely done!

Sic video ....need a factory in England lol

This was just..... AMAZING!! Best video on youtube all year by far.


Any question Answer : yeah

I'm not a chemist but I've studied this process, Its known as electroless plating of copper wherein you use copper solution and a reducing agent, initially you drill holes in the PCB base and then carry out surface activation within the holes so that Cu2+ ions when reduced (reducing of Cu+2 is like giving electrons to the ions so that they convert to metallic form ) get deposited on the suface within the holes, surface activation is done by using Stannous chloride and palladium chloride or other agents, the base is dried and electroless plated, here the Cu+2 ions in the solution get reduced by the reducing agent and then the Copper atoms get deposited on the surface within the holes and form a thin layer thereby forming a connection between the two sides of the PCB.

Fantastic! Thanks to you and Jlpcb for giving us a peek into the technology used to make our PCBs.

Short conspect of the girl's speech: "Yeah :) Yeah! Yeah... Yeah >_< Yeah :C ....... Yeah. And here it ching chong ching chong ching chong. Yeah."

So interesting! Great stuff man. More like this!

I had used their service few dozens time. Cheap and good enough for me.

Syncing with the girl: yeah , yeah, yeah, yeah, yeah , yeah , yeah lets go ... yeah , yeah , yeah ,yeah , yeah , yeah , this is the room we have to cut it , yeah , yeah , yeah ,yeah hehehehehe yeah yeah yeah yeah uhhum when we go this machine this cut in pieces beacuae the edge is shapre we smooth it , we are going to see yeah, yeah , ueah , yeah ,yeah . Scooty : yeah

you lost me at the holes

amazing ... i will try order ...

Con los nuevos aranceles de Trump a China dificilmente veremos a un chino en una ensambladora estadounidense haciendo lo mismo que en el video.

Made in China! Great video.

Compliments to you Scotty! In a sort time such an awesome & growing channel! You are very polite and respectfull!! I think it was an good choice to travel in Asia, it looks like they are so much more in modern progression than the West. I would like to go there too in the (nearby) future! Maybe we'll ever meet up ;-) Enjoy your day!

... yer jobs, kiddies! - better hurry on up - those fries and 'hand-crafted' hamburgers are gettin' cold... ... ... Y'all can thank the 'hippies' and the 'hip' capitalist pigs in Das D'Strict Von Columbia for the big, American 'dream' give-away!

Why is this a-hole shouting

such a Bambi.. ya ya yah

Nice video, yah

I wonder who design / manufacture those machines in that factory , shown in the videos .

Oh i see

Thank you got making this video. I get my boards from them and I love them fast service and shipping.

what was up witht hte image quality at about 14 minutes? is it the lighting that made it look like vhs quality?

Fascinating! Enjoyed this very much. One little critique, I think maybe you talk a little to fast for them to understand you completely. :-)

looks like he knew more than her

72 times yeah yeah

Wow its so cheap to get stuff made here too, insane!

انهم بعملون بكل دقة وامانة وقناتك قناة رائعة استمر وفققك الله - احببت ان اكتب بالعربية للحفاظ على تنوع الثقافات

Rather than a factory, I'd love to see how the distribution and shipping asect of sending these phones overseas works. There's this russian guy that does tours of all the most important internet sellers of Chinese goods - Gearbest, DX, Pandawill - bur again his stuff is entirely in Russian. Also cool would be a look at what happens to your package while it's still in China, always wondered how that worked and sadly just the tracking just didn't do it for me.

Great video!

Scotty:Trump is the best president. Lily:Yeah ,Yeah.


You brought that girl just to say YEAH? wtf...

Space x

I couldn’t believe my eyes, what a factory that is..


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