Patent ID: 6100134
Filing Date: 2000-08-08
Classification: H01L

Abstract:
A method of fabricating a semiconductor device, comprising the steps of:(a) selectively forming a first conductive film on a surface of a semiconductor substrate;(b) forming a first insulative film on said first conductive film;(c) forming a second insulative film on a structure provided by said steps (a) and (b);(d) forming a third insulative film on said second insulative film;(e) forming a fourth insulative film on said third insulative film;(f) selectively and individually etching said fourth insulative film, said third insulative film, and said second insulative film in this order to expose a part of said surface of said semiconductor substrate which is located in a first position where said first conductive film is not formed, wherein etching said second insulative film forms side walls formed by unetched portions of said second insulative film contacting said first conductive film and said first insulative film on respective side surfaces of said first conductive film and said first insulative film; and(g) forming a second conductive film for electrically contacting said semiconductor substrate in said first position,wherein the etching rate of said third insulative film is lower than that of said fourth insulative film.