Patent ID: 6040242
Filing Date: 2000-03-21
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, comprising:a first step of forming an insulating film on a semiconductor substrate;a second step of forming a first film comprising silicon to cover said insulating film;a third step of forming a contact hole having a desired radius through said insulating film and said first film so that said semiconductor substrate is exposed in a bottom of said contact hole;a fourth step of forming a second film comprising WSi.sub.x (O<x<3) to fill said contact hole and cover said first film, wherein the second film has a thickness which is greater than the radius of said contact hole;a fifth step of removing said first film and said second film in an area other than said contact hole, wherein said first film is etched at a greater etching rate than that of said second film to form a buried contact plug comprising a part of said second film.