Patent ID: 6969671
Filing Date: 2005-11-29
Classification: H01L

Abstract:
1. A method of producing a semiconductor device comprising: providing an insulating film on a main surface of a substrate; forming a contact hole in said insulating film; forming a conductive layer within said contact hole and extended over the surface of said insulating film including (i) depositing a titanium film at least within the contact hole and to be in contact thereat with silicon material followed by (ii) depositing a conductive film on said titanium film to be in contact therewith and covering the inner side walls of the contact hole and extended over the surface of the insulating film; and performing a heat reaction process, after said titanium film and said conductive film are deposited, in which a single titanium silicide film is formed within the contact hole, wherein the heat process is such that the titanium silicide film is grown to a thickness, above a minimum thickness required to assure low contact resistance, defined by where σ is the internal stress (MPa) within said conductive film after formation of said conductive film, to prevent peeling of said titanium suicide film from said silicon material.