Patent ID: 7812406
Filing Date: 2010-10-12
Classification: H01L,Y10S

Abstract:
1. A method for manufacturing a semiconductor device, comprising: forming a first insulating film on a semiconductor substrate; forming an electrode layer on said first insulating film; etching said electrode layer, said first insulating film, and said semiconductor substrate to form a trench in a first predetermined region of said device; burying an element-isolating insulating film in said trench; forming a second insulating film on said element-isolating insulating film and above said electrode layer; etching said second insulating film, said electrode layer, and said element-isolating insulating film to form a gate pattern comprising said second insulating film and said electrode layer in a second predetermined region of said device and to form a dummy pattern comprising said second insulating film and said element-isolating insulating film in a third predetermined region of said device; forming a third insulating film for covering said gate pattern and said dummy pattern; and planarizing said third insulating film using said second insulating film as a stopper.