Patent ID: 6060352
Filing Date: 2000-05-09
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising the steps of:forming a plurality of wiring conductors over a semiconductor substrate;covering upper and side surfaces of said K wiring conductors with first insulating films;forming a second insulating film on the resulting semicondutor substrate to cover therewith said first insulating film, said second insulating film having a flat upper surface and including a material larger in etching rate than a material of said first insulating film;forming a mask film on the flat upper surface of said second insulating film, said mask film including a material smaller in etching rate than a material of said second insulating film, and thereafter forming openings in contact hole forming regions of said mask film located between said plurality of wiring conductors adjacent to each other; andforming contact holes by etching and removing a part of said second insulating film exposed in the opening regions of said mask film, said contact holes being defined by said first insulating films in self-alignment.