A: Such a situation may be caused by the PCB factory not developing enough when doing exposure green oil, so that there is a thin layer of photosensitive ink remaining on the surf...
SMT OSP PCB partial rejection and tin blasting discussion?
A: Such a situation may be caused by the PCB factory not developing enough when doing exposure green oil, so that there is a thin layer of photosensitive ink remaining on the surface of the pad.