WEBVTT

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so you just bought a shiny new motherboard and after you're done ooing

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and eyeing over the heat sinks that say extreme gamer that are designed to look

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like a battle axe or whatever you might have noticed all those tiny traces on

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the board that connect all of your ports headers and sockets together and

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actually make the board light up and function correctly and although they're

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not particularly exciting traces on

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printed circuit boards or pcbs have basically made all of modern Electronics

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possible in fact before they became widespread in the latter half of the

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20th century connecting every electrical

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component inside of an appliance looked a little something like this a huge mess

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of individual wires this is actually a

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look inside of a TV from 1948 I mean

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imagine trying to build a computer or even bu a flat panel TV if you had to

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deal with that fortunately the idea of

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embedding wires in a flat piece of fiberglass really took off as the years

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went by making it possible to fit a PC in a backpack instead of a giant cabinet

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but how exactly then do they pack so many important Connections in such a

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small space the process is actually

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somewhat similar to how CP user manufactured which you can learn more

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about in this video albeit at a bit of a less complicated scale slices of

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fiberglass are stacked together and treated with a resin that makes them

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stick to each other to make one solid slab then layers of copper are applied

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to both sides and Co it in a chemical called photo resist after this a pattern

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that matches up exactly to the traces that are supposed to go on the board is

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placed on top top then the whole thing is exposed to UV light the board is then

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washed which well washes away the

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uncovered areas leaving tracks of copper

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these tracks serve as a base for how the PCB will ultimately look after a couple

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of more steps including etching additional copper and more washing but

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keep in mind that this process is often done in layers which is why it's a

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terrible idea to try and drill through your motherboard if you're having

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trouble mounting a cooler to it the internet has more than a few Tales of

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people that tried to do this only to find out that their board didn't work at

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all afterwards because they drilled in the middle of traces that were visible

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from the outside but went right through

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ones that were inside of it but that

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isn't to say that boards don't get drilled at all during manufacturing at

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the factory boards not only get mounting holes drilled through them for whatever

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four form factor they happen to fit in but they also get small holes to

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accommodate connections for small electrical components like chips

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capacitors and resistors as well as Tiny

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interconnects between the different layers of copper traces so after things

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like PCI Express slots heat sinks and CPU sockets are mounted or soldered to

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the board it's basically finished but since a PCB is just a collection of

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electrical connections on some kind of of a substrate you don't actually need

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any fancy manufacturing processes to make a simple one in fact you can even

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buy markers that will dispense electrically conductive ink onto special

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paper so you can literally draw your own working PCB pretty cool but given the

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inherent complexity in manufacturing something like an ATX motherboard I

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wouldn't count on being able to make your own one of those and maybe stick to

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you know making LED art that you can stick to your refrigerator

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