Patent ID: 6198149
Filing Date: 2001-03-06
Classification: H01L

Abstract:
A semiconductor device comprising:an element isolating film formed on a major surface of a semiconductor substrate;an element forming region formed on said major surface and surrounded by said element isolating film;a gate insulating film formed on said element forming region;a gate electrode formed on said gate insulating film within said gate insulating film, said gate electrode having a portion extending over said element isolating film;a first impurity region formed in said element forming region adjacent to a first side of said gate electrode and gate insulating film;a second impurity region formed in said element forming region adjacent to a second side of said gate electrode and gate insulating film;a first insulating film formed on a first side surface of said gate electrode and on said first impurity region and extending over said element isolating film, the first insulating film having a first distance from one end adjoining said first side surface of said gate electrode to another end; anda second insulating film formed on a second side surface of said gate electrode and on said second impurity region, the second insulating film having a second distance from one end adjoining said second side surface of said gate electrode to another end;wherein said first distance of said first insulating film is greater than said second distance of said second insulating film.