Printed circuit board manufacturers
8 layers pcb assy blue custom gold-fingers IPC class 3 electronic circuit board
Electronic circuit board specification ：
|Min.Hole size：||8mil||Surface finish：||ENIG+30 U” gold fingers|
|Copper thickness:||1 OZ||Unit size：||3.50*4.50″|
|Leading time：||7 working days||Min.copper hole：||1mil/hole|
* We choose IT 180A for TG 175, especially for the multilayer circuit boards
* The surface finish of the board is ENIG+gold fingers. For the gold thickness of the gold fingers, we have the specification of 15u”, 30u”, 50u” and 60 u”.
* Also we have the 1 mil min copper in holes as our standard.
* For the solder mask color, we provide not only bule, but also other colors like black, red and yellow.