Patent ID: 7094672
Filing Date: 2006-08-22
Classification: H01L

Abstract:
1. A method for forming a self-aligned contact in a semiconductor device, comprising the steps of: (a) providing a substrate having at least one gate structure and at least one junction region adjacent said gate structure; (b) forming a first insulating layer along a profile of said gate structure and said junction region; (c) forming a temporary layer on said first insulating layer; (d) selectively removing a portion of said temporary layer while leaving a plug portion of said temporary layer over said junction region; (e) forming a second insulating layer in a region where said portion of said temporary layer is removed; (f) removing said plug portion to form a contact hole; (g) removing a portion of said first insulating layer at a bottom of said contact hole; and (h) forming a conductive contact in said contact hole; wherein a third insulating layer is formed on side walls of said plug portion after said step (d); wherein said third insulating layer is made of material different from that of said second insulating layer.