Patent ID: 7132756
Filing Date: 2006-11-07
Classification: H01L,H05K

Abstract:
1. A semiconductor device comprising: a semiconductor element including a plurality of electrode parts; and a wiring substrate including: the insulation layer has an elastic modulus of not less than 0.1 GPa and not more than 5 GPa, and a surface of the electrode-part-connection electrode defining a smooth surface with adjacent portions of a surface of the wiring substrate on a semiconductor element side, and the surface of the wiring substrate on the semiconductor element side being recessed at a position where the electrode-part-connection electrode is provided; the electrode part and the electrode-part-connection electrode include metal layers made of at least one kind of metal selected from the group consisting of noble metals and solder alloys, and the metal layer of the electrode part and the metal layer of the electrode-part-connection electrode are connected by a metal joint that is devoid of bumps, and further wherein a surface of the wiring substrate on a semiconductor element side and a surface of the semiconductor element on a wiring substrate side are bonded directly with each other so that spaces between the electrode parts are filled with the insulation layer.