Patent ID: 8222118
Filing Date: 2012-07-17
Classification: H01L

Abstract:
1. A method of processing a semiconductor wafer, comprising: providing a semiconductor wafer having a wafer backside, wherein the wafer backside has a surface roughness; roughening the wafer backside to increase the surface roughness; isotropically etching away 3-25 μm of the thickness of the wafer backside while preserving the surface roughness, wherein the isotropically etching-relieves stress in the wafer; and metallizing the wafer backside with a metal layer comprising at least one of titanium (Ti), nickel-vanadium (NiV), nickel-vanadium-argentum (NiVAg), nickel-vanadium-gold (NiVAu), titanium-platinum-gold (TiPtAu), gold-titanium-nickel-vanadium-argentum (AuTiNiVAg) and chromium-nickel-vanadium-argentum (CrNiVAg).