Patent ID: 6250606
Filing Date: 2001-06-26
Classification: H01L,H05K,Y02P

Abstract:
A substrate for a semiconductor device, comprising:an insulating substrate having one surface and the other surface opposing the one surface and having a plurality of first through holes communicating between the one surface and the other surface; anda conductive layer having a conductive portion formed to cover the opening portion of said first through hole in the one surface of said insulating substrate,said first through hole being defined by a sidewall surface of said insulating substrate, said sidewall surface of said insulating substrate being formed such that the opening area of said first through hole increases from the one surface to the other surface of said insulating substrate,the shape of the opening of said first through hole having a projected portion at a part where stress concentrates when said insulating substrate having a semiconductor chip mounted on the one surface is mounted on and connected to a mounting board by an external connection terminal joined to said conductive portion through said first through hole.