Patent ID: 6414395
Filing Date: 2002-07-02
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate; a first wiring layer, provided on said semiconductor substrate, having an antireflection film thereon; an interlayer isolation film provided on said semiconductor substrate to cover said first wiring layer; and a through hole passing through said interlayer isolation film and said antireflection film for partially exposing a surface of said first wiring layer, an inner edge of said antireflection film horizontally extending in said through hole, the semiconductor device further comprising: a clearance filling member filling up a clearance under said inner edge; a barrier metal film continuously covering exposed said surface of said first wiring layer, an inner wall surface of said through hole and a surface of said interlayer isolation film; and a second wiring layer passing through said through hole, provided on said interlayer isolation film to be connected with said first wiring layer through said barrier metal film, wherein said clearance filling member fills a second clearance over said inner edge, said second clearance defined by an inner wall of said interlayer isolation film and a top surface of said inner edge.