Patent ID: 6703310
Filing Date: 2004-03-09
Classification: H01L

Abstract:
A method of production of a semiconductor device comprising:forming an electronic element on one surface of a semiconductor substrate; forming an electrode pad having an extension and electrically connected with said electronic element on said one surface of the semiconductor substrate; forming a first opening in said electrode pad by patterning; forming a second opening in said semiconductor substrate including said electronic element by firing through said first opening a laser beam of a smaller diameter than the diameter of said first opening, thereby defining a through hole by said first opening and said second opening; forming an insulating film on at least the other surface of said semiconductor substrate, an inner wall of said through hole, and said electrode pad including said extension; forming a via hole exposing part of said extension of said electrode pad by patterning said insulating film; forming a conductive film on said insulating film and in said via hole; and forming an interconnection pattern electrically leading said electrode pad to the other surface of said semiconductor substrate through said through hole and said via hole by patterning said conductive film.