Patent ID: 8476161
Filing Date: 2013-07-02
Classification: C23C,H01L

Abstract:
1. A Cu electrical interconnection film-forming method comprising the steps of: forming, on a substrate provided thereon with holes or trenches, a barrier film composed of a member selected from the group consisting of Ti, TiN, Ta, TaN, W, WN and silicide; forming an adhesive layer of a PVD-Co metal film, a CVD-Co metal film or an ALD-Co metal film on the barrier film thus formed; filling up or burying the holes or trenches, the surface of which is covered with the Co film, with a CVD-Cu film or a PVD-Cu film; and heat-treating the resulting substrate provided thereon with the foregoing films thus formed at a temperature of not higher than 350° C. to thus form a Cu electrical interconnection film.