How to Solve the Defects of PCB Hole Metallization Technology
In PCB factories, hole metalization usually consists of 8~9 steps of chemical working fluid treatment to complete the entire process. For each technology condition control of each step, some quality defects may occur, thus affecting the quality of the final electroless copper . Do you know what causes the defect? And how to solve these defects? 1. The backlight is unstable and there is no copper in the hole wall Reason: 1) The working fluid components of electroless copper plating are out of balance or the technology conditions are out of control. 2) The regulator is missing or invalid. 3) The activator component is low or the temperature is low. 4) Acceleration is too strong. 5) The base material are different and the drilling stain removal is too strong. 6) The inner layer of the hole wall is broken or peeled off during drilling. Solution: 1) Adjust the working fluid components and tec...