日本語
Hello,
i got some PCB′s ordered with a copper layer thickness of 105um. I had some doubt because traces kept breaking on the pcb and cut of a small piece off on one of the boards. I had to remove the solderstopmask with a knife and measuered the thickness in the attached picture.
I measured a thickness of about 80um, did i make a mistake measuring the thickness like this or did the manufacturer use 70um copper?
- Comments(1)
A****min
May 15.2019, 16:44:49
2oz would be 70 micron.
I am assuming your flake is both copper foil, and the adhesive layer.
For normal 1 oz with vias, you begin with 0.5 oz foil and they plate on another 0.5 oz for the vias.
As for adhesion strength, many things come in to play, but the common causes are way too hot / too long on the iron tip. and very cheap PCB's (a number of the cheap services that i have used have not had this issue, but i know it happens)
