Printed Circuit Board PCB Manufacturing Process Explained with 3D Animation

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Transcript

00:00It can be said that the printed circuit board is the backbone of all electronic products.

00:05Electronic products without printed circuit boards are like this.

00:09Let's take a look at its working principle.

00:11This is a layer of copper foil and the yellow one is a piece of insulating glass fiber

00:16which is pressed under the PCB board to support the copper foil.

00:20Then it will be sent to the machine together to make positioning holes first.

00:24The component holes connecting the circuit board will be designed by the engineer through the computer first

00:30and then sent to the 3D model machine.

00:33According to the design of the drawing, different holes will be drilled.

00:37Now the key point is here.

00:39How are these tiny homogeneous lines neatly printed on the circuit board?

00:44The genius engineers used a chemical method called etching,

00:48first covering the copper with a designed electroporation mask

00:52and then sending it to an alkaline solution of 60-120°C.

00:58This will corrode the part that is not covered with the resist mask, leaving the designed circuit lines.

01:04After doing this, the circuit board will be sent to the optical inspection machine for baseline inspection.

01:11By comparing it with the original design drawing, if it is damaged, it will be discarded.

01:16Now let me ask you a question.

01:19Do you know why the circuit board is green?

01:22The answer is that in order to prevent the circuit board from oxidation,

01:26a layer of solder mask resin is applied on the circuit board.

01:30It is generally green and is an insulator.

01:32The circuit lines are hidden inside.

01:35Now if you look carefully, you will find that there are also solder mask branches in these holes.

01:40At this time you only need to cover the edge of the hole with chemical corrosion resistant material.

01:46The solder mask in the hole will be corroded and the circuit lines will come out.

01:50Then apply the silk screen.

01:53These silk screen traces are used to identify the components on the circuit board.

01:58Of course, only one layer is mentioned here.

02:00In fact, PCB boards can be made of more than 10 layers, which is not simple at all.

02:07Finally, all the components of electronic products will be placed on the PCB board,

02:12such as CPU, resistors, storage devices, etc.

02:17So printed circuit boards are the backbone of electronic products.

02:21So do you know what the value of PCB boards is?

02:24Like and follow for more informative 3D videos.

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