Patent ID: 7049229
Filing Date: 2006-05-23
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device having a semiconductor element formed on one main surface of a semiconductor substrate, comprising the steps of: forming a first opening in said substrate from the opposite main surface thereof, so as to expose therein a contact portion of said semiconductor element; forming a first insulating film on said opposite main surface of said semiconductor substrate so as to cover also the inner wall surface of said first opening; removing a portion of said first insulating film locally at the bottom of said first opening so as to expose a part of said contact portion; aligning and placing a film-formed second insulating film, having a second opening larger than said first opening, on said opposite main surface of said semiconductor substrate so as to allow said first opening to fall within said second opening; forming a conductive film on said second insulating film so as to fill both of said first and second openings; and removing a part of said conductive film and said second insulating film to thereby form a through electrode which fills said first and second openings and is connected to said contact portion.