Patent ID: 6348416
Filing Date: 2002-02-19
Classification: H01L

Abstract:
A process in me production of a semiconductor device including a semiconductor chip, a resin package sealing said semiconductor chip, a resin protuberance on the surface of said resin package, a plated film covering the surface of said resin protuberance and a wire electrically connecting an electrode of said semiconductor chip to said plated film, said carrier substrate including a sheet-like metal substrate dissolvable by an etchant solution not dissolving said plated film, and suitable for fixing said semiconductor chip; a recess disposed at a position of said metal substrate corresponding to said resin protuberance, and having a bottom surface and/or side surface that are/is rugged; and a plated film for covering continuously said bottom surface and said side surface of said recess, and having a surface shape corresponding to surface shapes of said bottom surface and said side surface, said process comprising:forming an etching resist layer on both surfaces of said sheet-like metal substrate; patterning said etching resist layer on one of the surfaces of said metal substrate to form a resist pattern having an opening at a position corresponding to said resin protuberance such that a part of said etching resist layer remains in an island-like shape inside said opening; etching said metal substrate, said island-like shape causing said etching to proceed non-uniformly inside said opening, thereby forming a recess having a side surface and a rugged bottom surface at the position of said opening of said resist pattern; and forming a plated film covering said side surface and said bottom surface of said recess.