Patent ID: 6579762
Filing Date: 2003-06-17
Classification: H01L

Abstract:
A fabricating method for a nonvolatile semiconductor memory device, comprising:forming a tunnel oxide film on semiconductor substrate; forming a first polysilicon layer on said tunnel oxide film; forming an interlayer insulating film on said first polysilicon layer; forming a second polysilicon layer on said interlayer insulating film; forming a first and a second photoresist patterns on said second polysilicon layer; patterning said second polysilicon layer, said interlayer insulating film and said first polysilicon layer using said first and second photoresist patterns as a mask to form a first and a second gate patterns; and implanting an ion to said semiconductor substrate using said first and second gate patterns as a mask to form a first diffusion region positioned one side of said first gate pattern, a second diffusion region positioned the other side of said first gate pattern and one side of said second gate pattern, and a third diffusion region positioned the other side of said second gate pattern.