Four-layer board copying is to repeat the copying of two double-sided boards, six-layer board copying is to repeat the copying of three double-sided boards, and so on, and multilayer board copying is to repeat the copying of multiple double-sided boards. The reason why multilayer is so daunting is that we can’t see the internal alignment.
So how can we see the inside of a multilayer board? This problem can be solved by layering. Now there are many ways to delamination, there are potion corrosion, tool stripping, etc., but it is easy to layer overload, loss of information. Experience tells us that sandpaper is the most accurate method of layering. Grinding board is currently the most common layering program, but also the most economical.
When we complete the top and bottom of the multilayer PCB board copy board, sandpaper sanding method to grind off the PCB surface layer to show the inner layer. Sandpaper is a hardware store to sell ordinary sandpaper, generally flat PCB, and then hold down the sandpaper, evenly rubbed on the PCB (if the board is very small, you can also lay the sandpaper, with a finger to hold down the PCB in the sandpaper rubbing). The main point is to lay flat, so as to grind evenly. Silk screen and green oil is generally a wipe off, copper wire and copper skin should be well rubbed a few times. General Bluetooth board a few minutes to wipe well, memory sticks about ten minutes.
Four-layer board copy board method steps:
1, scanning the top and bottom of the four-layer circuit board picture;
2, to complete the top and bottom of the four-layer circuit board copy board work;
3, sandpaper sanding off the top and bottom of the four-layer circuit board, revealing the inner two layers of the four-layer board;
4, scanning the four-layer circuit board inside the two layers;
5, in the board copying software to add the middle layer, and complete the four-layer circuit board inside the two layers of the board copying work;
6, four-layer board copy board work is completed, respectively, check each layer of the line to ensure the accuracy of the PCB copy board.
Multi-layer board copying method steps with reference to the four-layer board copying method analogous. The more layers of the board, the greater the workload of PCB copying.
Multilayer board copying skills:
After the completion of multilayer board copying, the cost of PCB board making is several times that of double-sided board, and once the copying board is wrong, the internal lines are difficult to be solved by wiring or jumper methods. Therefore, the accuracy of the multilayer board copy board plays a decisive role in the debugging of the final circuit board. Multilayer board copying should master more skills to ensure the accuracy of multilayer board copying.
