Patent ID: 8378484

Claim:
A semiconductor device comprising: an integrated circuit; and an electrode, wherein the integrated circuit is electrically connected to an external circuit through the electrode, wherein the electrode has a first portion and a second portion, wherein the first portion is a projection, all regions of the projection are rounded, wherein all regions of the projection are inserted into the external circuit, wherein a taper angle of the first portion is larger than a taper angle of the second portion, wherein a non-conductive resin paste is interposed between the external circuit and the second portion, wherein the non-conductive resin paste is in contact with an upper surface of the second portion and the external circuit, wherein a side surface of the projection is in contact with the external circuit, wherein the non-conductive resin paste comprises a region, a whole of the region overlapping with the second portion, and the external circuit in a direction perpendicular to a plane on which the integrated circuit or the external circuit is formed, wherein a first part of the second portion is closer to the projection than a second part of the second portion, and wherein an angle between an upper surface of the first part and a bottom surface of the electrode is larger than an angle between an upper surface of the second part and the bottom surface.