Patent ID: 7943517
Filing Date: 2011-05-17
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming an opening in an interlevel insulating film disposed on a semiconductor substrate, the interlevel insulating film containing silicon atoms; forming an auxiliary film containing a predetermined metal element, to cover an inner surface of the opening; forming a main film to fill the opening after forming the auxiliary film, the main film containing, as a main component, Cu used as a material of an interconnection main layer; and performing a heat treatment before or after forming the main film, thereby diffusing the predetermined metal element of the auxiliary film onto a surface of the interlevel insulating film facing the auxiliary film, so as to form a barrier film on the interlevel insulating film within the opening, the barrier film containing, as a main component, a compound of the predetermined metal element with the silicon atoms of the interlevel insulating film.