Patent ID: 8021950
Filing Date: 2011-09-20
Classification: H01L

Abstract:
1. A method comprising: providing a wafer having a bottom surface and a top surface opposite said bottom surface; forming a semiconductor device adjacent to said top surface such that said semiconductor device incorporates an infrared absorbing layer, said infrared absorbing layer being selectively placed within said semiconductor device; forming at least one dielectric layer on said semiconductor device; forming a contact extending vertically through said at least one dielectric layer to said semiconductor device; forming, above said at least one dielectric layer and immediately adjacent to said contact, at least one layer of metal for a back end of the line (BEOL) metal wiring level; and after said forming of said at least one layer of metal, selectively heating said infrared absorbing layer to a first predetermined temperature by exposing said bottom surface of said wafer to infrared radiation,