Patent ID: 8153900
Filing Date: 2012-04-10
Classification: H01L,H05K,Y02P

Abstract:
1. A wiring substrate with a lead pin, comprising: a wiring substrate; and a lead pin bonded to an electrode pad formed on the wiring substrate through a conductive material, wherein the lead pin includes a shaft part and a head part formed in one end of the shaft part, the head part having a conic protrusion part formed in an end face side of the head part opposed to the electrode pad, the conic protrusion part being a conic body having a side surface formed as a concave curve when viewed from a sectional direction, said concave curved side surface of the conic body forming a side surface of the head part of the lead pin, said sectional direction is a section cut at a surface parallel to an axis including an apex of the conic body.