PCB Technical - The manufacturing process and method of the PCB board of the automobile FPC factory

First of all, we need to know that the PCB cutting of the automobile FPC factory refers to the process of obtaining the schematic diagram and the board diagram (PCB diagram) according to the original PCB board. It is mainly used for later development. The later development includes a series of operations such as installing components, deep testing, and modifying circuits. Because it does not belong to the category of PCB board cutting, I won't talk about it here.

In the process of PCB board cutting, there will be some harmful types of work (sand paper grinding board) and simple repetitive work (tracing lines), and many designers are not willing to engage in this work at all.

First, let's take a look at the process of PCB board cutting:

1. Remove the components on the original board.

2. Scan the original board to get the graphic file.

3. Grind off the surface layer to obtain the intermediate layer.

4. Scan the middle layer to get the graphic file.

5. Repeat steps 2-4 until all layers are processed.

6. Use special software to convert graphics files into electrical relationship files---PCB diagrams. If you have the right software, the designer only needs to trace the graphics once.

7. Check to complete the design.

Then we talk about the skills of PCB board cutting:

I have to admit that the cutting of PCB boards in automobile FPC factories, especially the cutting of multi-layer PCB boards, is a very time-consuming and wasteful work. A lot of the work is repetitive, which requires us to have enough patience and Be careful to ensure that no errors occur. Of course, we can also use appropriate software agents to manually perform repetitive tasks, which can save time and effort.

1. A scanner must be used during the cutting process.

Many designers are used to drawing lines directly on PCB design systems such as PROTEL, PADSOR or CAD. This habit is very bad. The scanned graphic file is not only the basis for conversion into PCB file, but also the basis for later inspection. The use of scanners can greatly reduce labor difficulty and intensity. It is no exaggeration to say that if you can make full use of the scanner, even people with no design experience can complete the PCB board cutting work.

2. Grinding the plate in one direction.

Do not use two-way grinding plates for the so-called efficiency, because the two-way grinding plates are very easy to wear and cause other layers to be damaged in different degrees. The outer layer of the PCB board is harder than the inner layer, so the inner layer is easily damaged and cannot be polished, and the PCB board produced by the automobile FPC factory is difficult to accurately polish due to the difference in material, hardness, and elasticity.