Why does the edge of PCB burn when plating? Because the electronic products need precise technology and certain environment and safety adaptability, the PCB plating technology has made great progress. In PCB plating, the chemical analysis of organic compounds and metal additives is more and more complex, and the chemical reaction process is more and more accurate.
But even so, PCB plating still occasionally occurs the problem of burning at the edge of the board, so what is the root cause of the problem?
The reasons for burning of PCB edge during electroplating are as follows:
(1) Current density too high
Each bath has its best current density range.
If the current density is too low, the grains of the coating will coarsen, and even the coating cannot be deposited. When the current density increases, the cathodic polarization increases, which makes the coating compact and the plating speed increases. However, if the current density is too high, the coating will be blackened or burnt;
