Patent ID: 6284614
Filing Date: 2001-09-04
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, comprising:(a) providing a semiconductor substrate of a first conductive type;(b) forming field isolation regions on said semiconductor substrate;(c) providing first and second nonisolation regions in which said field isolation regions are not formed on said semiconductor substrate;(d) forming a gate insulating film on said first and second non-isolation regions at a same time;(e) removing said gate insulating film formed on said second non-isolation region to form a contact portion of said semiconductor substrate;(f) forming a diffusion layer of said first conductive type in said second non-isolation region from which said gate insulating film is removed;(g) forming a gate electrode after said (f) step such that said gate electrode is in contact with at least a portion of said second non-isolation region; and(h) after forming said gate insulating film, transforming said diffusion layer into a diffusion layer of a second conductive type different from said first conductive type.