Patent ID: 7041549

Claim:
A method for manufacturing a semiconductor device comprising: forming a trench isolation on a substrate, dividing the substrate into a first active region and a second active region; forming a first well region in said first active region and a second well region in said second active region; forming a first gate insulating film and a first gate electrode on said first active region and forming a second gate insulating film and a second gate electrode on said second active region; forming a first mask on said second active region; using said first mask and said first gate electrode as masks, forming a first pocket region in said substrate in said first active region; using said first mask and said first gate electrode as masks, implanting a first dopant impurity into said substrate in said first active region to form a first doped region; removing said first mask; forming a second mask on said first active region; using said second mask and said second gate electrode as masks, forming a second pocket region in said substrate in said second active region; using said second mask and said second gate electrode as masks, forming an amorphous region by implanting ions into said substrate in said second active region, making a portion of the surface of said substrate in said second active region amorphous; using said second mask and said second gate electrode as masks, forming a second doped region by implanting a second dopant impurity into said substrate, in said second active region; removing said second mask; heat treating, at 500° C. to 700° C., said substrate; forming sidewalls on sides of said first gate insulating film, said first gate electrode, said second gate insulating film, and said second gate electrode; using said first gate electrode, said second gate electrode, and said side walls as masks, increasing impurity concentration in a part of said first doped region and in a part of said second doped region, respectively, by implanting said first dopant impurity and said second dopant impurity; and irradiating said substrate with visible light.