Causes of PCB delamination and countermeasures

Posted by davidsmithsmile on September 30th, 2021

When making PCB board, we usually encounter some problems, most of which are the delamination problem of the circuit board. Today we only talk about the reasons for the delamination of the PCB board from the delamination of the PCB circuit board, and provide some solutions Measures for your reference.

After the PCB circuit board absorbs heat, different materials can produce different expansion coefficients, thereby forming corresponding internal stress, and when the resin and resin, the adhesion of the resin and the copper foil is not enough to resist this internal stress. Delamination, which is the root cause of PCB circuit board delamination, and after lead-free, the temperature and time of assembly are prolonged, which is more likely to cause PCB circuit board delamination.

As for how to deal with the delamination of PCB circuit boards, we recommend the following methods:
1. The choice of base material should be as far as possible to select qualified materials with credibility, and the quality of the PP material of the multilayer board is also a key parameter.
2. The lamination process is controlled in place, especially for multilayer boards with thick inner copper foils, and more attention should be paid. Under thermal shock, PCB circuit board delamination occurred in the inner layer of the multilayer board, causing the entire batch to be scrapped.
3. Quality of sinking copper. The denser the copper layer on the inner wall of the hole, the thicker the copper layer, the stronger the thermal shock of the PCB circuit board. Both PCB circuit boards have high reliability and low manufacturing cost, and each step of the electroplating process control requires refined control.

Fundamentally preventing delamination of PCB circuit boards is what every excellent PCB manufacturer should learn. Although it is not too late to make up for it, it is never wrong to do it right from the beginning. In this regard, POE has done very well, multilayer PCB and the yield rate of products out of the factory reaches 100%, which is your best choice.