Patent ID: 6184145
Filing Date: 2001-02-06
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, comprising:forming a laminate film above a semiconductor substrate, said laminate film including a conductive layer and an insulating layer formed on said conductive layer;performing a first etching process to said laminate film using a first mask to form a first group of patterns for first gates and a second group of patterns;depositing a polysilicon layer for pad polysilicon films after said first etching process;patterning said polysilicon layer to form said pad polysilicon films, comprising steps of:depositing a mask insulating film on said polysilicon layer;patterning said mask insulating film;forming side wall insulating films on side walls of the patterned mask insulating film; andpatterning said polysilicon layer using the patterned mask insulating film with the side wall insulating films as a mask to form said pad polysilicon films; andperforming a second etching process to said patterns of said second group using a second mask to form a third group of patterns for second gates.