Patent ID: 7087524
Filing Date: 2006-08-08
Classification: H01L

Abstract:
1. A method of forming a copper wiring in a semiconductor device, comprising the steps of: forming a first interlayer insulating film and an anti-polishing layer on a substrate; etching the anti-polishing layer and the first interlayer insulating film to form a damascene pattern; forming a copper anti-diffusion conductive film and a copper layer on the anti-polishing layer including the damascene pattern; forming a copper wiring within the damascene pattern; forming a metal element doping layer on the surface of the entire structure including the copper wiring; and forming a copper anti-diffusion insulating film and a second interlayer insulating film on the entire structure on which the metal element doping layer is formed, wherein a copper alloy layer and a metal oxide layer are formed at the interface of the copper wiring and the copper anti-diffusion insulating film due to heat upon depositing the insulating film, and the metal oxide layer is formed at the interface of layers around the copper wiring and the copper anti-diffusion insulating film.