Patent ID: 6969580

Claim:
A method of manufacturing a semiconductor device in which a first region and a second region narrower in width than that in said first region exist in a film, said method comprising the steps of: forming a hard mask on said film to be processed; forming a first resist film on said hard mask; processing said first resist film into a shape at least to define by covering a first portion in said film to be processed and to cover a portion including a second portion in said film to be processed; etching said hard mask using said first resist film as a mask; removing said first resist film; forming a second resist on the whole surface; processing said second resist film into a shape at least to cover a portion wider than the contour of said first portion in said film to be processed and to cover a portion wider than the contour of said second portion in said film to be processed; processing said second resist film into a shape at least to cover a portion including said first portion in said film to be processed and to define by covering said second portion in said film to be processed, by selectively trimming said second resist film; etching said hard mask using said second resist film as a mask; and etching said film to be processed using said hard mask as a mask, thereby forming said first region in said first portion and said second region in said second portion.