Patent ID: 6451682
Filing Date: 2002-09-17
Classification: H01L

Abstract:
A method of forming an interconnect film of a metallic material consisting of copper or copper alloy on a substrate which has an insulating film thereon, the insulating film having at least one hole or groove formed thereon, the method comprising:forming a barrier layer which covers a surface of the insulating film and an inner surface of the hole or groove; precipitating crystal grains having an average crystal grain size of 0.1 &mgr;m or less of the metallic material on the barrier layer or a seed layer formed on the barrier layer; and heating the substrate on which the metallic material crystal grains are precipitated under a high-pressure gas atmosphere to grow the metallic material crystal grains while suppressing generation of pores among the grains, thereby obtaining a substantially pore-free film of the metallic material filling the hole or groove and covering the whole substrate surface.