Patent ID: 7611984
Filing Date: 2009-11-03
Classification: H01L

Abstract:
1. A manufacture method for a semiconductor device, comprising steps of: (a) forming a copper alloy film by sputtering or chemical vapor deposition, the copper alloy film containing one metal element selected from a first group consisting of Al, Mg, Mn and Cr and one metal element selected from a second group consisting of Ti, Ta and Zr in addition to copper on a surface of an insulator containing oxygen and formed over a semiconductor substrate; and (b) forming a metal film by electrolytic plating method, the metal film containing pure copper or copper alloy on the copper alloy film; and further comprising a step of: (c) after the step (a) or (b), performing heat treatment under a condition that a metal oxide film is formed on a surface of the insulator through reaction between the oxygen in the insulator and the metal elements in the copper alloy film.