Patent ID: 8058162
Filing Date: 2011-11-15
Classification: H01L

Abstract:
1. A method of manufacturing a nonvolatile semiconductor memory, comprising: forming an insulator structure on a semiconductor substrate in a first region; forming a first gate insulating film on said semiconductor substrate outside said first region; blanket depositing a first gate material film and etching-back said first gate material film to form a first gate electrode on said first gate insulating film lateral to said insulator structure; removing said insulator structure; blanket forming a second gate insulating film; blanket depositing a second gate material film and etching-back said second gate material film to form a second gate electrode on said second gate insulating film in said first region; and silicidation of upper surfaces of said first gate electrode and said second gate electrode, wherein any one of said first gate insulating film and said second gate insulating film is a charge trapping film that traps charges, and at least one of said upper surfaces of said first and second gate electrodes is convex curved.