Patent ID: 7993504

Claim:
A system for processing a backside of a semiconductor device comprising: a processing chamber; a semiconductor device within said processing chamber, said semiconductor device having a plurality of layers with a substrate layer at a backside surface thereof; a window residing within said substrate layer at said backside surface of said semiconductor device in a location corresponding to one or more electrical features of said semiconductor device, said window exposing only a material of said substrate layer; an ion source within said processing chamber; at least a first and a second collimator within said processing chamber located between said ion source and said semiconductor device; a shield with an opening in said processing chamber, said shield being located between said second collimator and said semiconductor device, whereby said system generates a collimated ion plasma that is focused through said opening so as to only contact said semiconductor device within said backside window for uniformly removing selected ones of said plurality of semiconductor layers exposed through said window for exposing said one or more electrical features of said semiconductor device.