Dear Technetters,

We are using the Electrostatic U-Coater for the Solder Mask process.

Could anyone give some idea about:

1. The Solder Mask adhered inside the small holes (Hole dia. 0.250 mm)

2. Solder mask do not cover on the Blind via hole ( Hole dia. 0.120 mm)

 

Thanks in advance

Luong Huy Doan
FCV Inc.