Patent ID: 7863191
Filing Date: 2011-01-04
Classification: H01L

Abstract:
1. A manufacturing method of a semiconductor device having a silicide film, comprising at least: a first step of forming a first structure having a first opening formed through an interlayer insulating film to reach a contact plug, a second opening formed through the interlayer insulating film to reach a semiconductor substrate, and a third opening formed through the interlayer insulating film to reach a polymetal gate electrode; a second step of depositing a cobalt (Co) layer on the surface of the first structure; a third step of performing heat treatment to form a cobalt silicide layer on the surface of the contact plug and on the surface of the semiconductor substrate; and a fourth step of removing unreacted cobalt (Co) from said third opening and exposing the surface of said polymetal gate electrode with the use of a chemical solution capable of dissolving cobalt (Co) but not the polymetal.