Patent ID: 6281051
Filing Date: 2001-08-28
Classification: H01L,Y10S

Abstract:
A method of manufacturing a semiconductor device, comprising the steps of:forming a first insulating film on a semiconductor substrate;forming a first opening in said first insulating film to expose a surface of said semiconductor substrate;forming first to third electrodes insulated from each other by a sidewall insulating film in said first opening;positioning an upper surface of any of said first to third electrodes different from upper surfaces of the other electrodes;forming an interconnection layer connected to the upper surface of any of said first to third electrodes;forming a second insulating film below said first electrode;forming impurity diffusion layers of a prescribed conductivity type in said semiconductor substrate below said second and third electrodes;after forming said first opening, forming said second insulating film on said semiconductor substrate;forming a first conductive film on said second insulating film only in said first opening;etching said first conductive film to form a first electrode and second and third openings to expose the surface of said semiconductor substrate; andforming a second conductive film only in said second and third openings.