ENIG hardness versus Hard Gold hardness| 9 May, 2018
I would like to know the hardness figures of ENIG finish and hard gold finish. I can find the hard gold finish number and it appears to be 130-200 knoop. But what about ENIG finish?
ENIG hardness versus Hard Gold hardness| 9 May, 2018
You can't find a hardness spec for immersion gold [ImAu] because no one cares. The ImAu dissolves into the solder during thermal processing. Pressed, I'd guess for that ImAu hardness is about that of soft gold