Patent ID: 7304394

Claim:
A semiconductor device comprising: an insulating tape on which a plurality of wiring patterns are provided; a semiconductor element having protrusion electrodes that are respectively electrically connected with the insulating tape via the corresponding wiring patterns; an insulating resin provided between the semiconductor element and the insulating tape; and connection sections, each of the connection sections (i) respectively provided in those facing regions of the wiring patterns which is directly under the surface of the corresponding protrusion electrodes that faces the insulating tape, and (ii) connected with the corresponding protrusion electrodes in such a manner that the connection sections deform and intrude into the corresponding protrusion electrodes, while pushing away the insulating resin; wherein each connection section has a narrower-width portion and a wider-width portion, the narrower-width portion located toward a middle of the semiconductor element, and the wider-width portion located toward an outer circumference of a region in which the semiconductor element is mounted, and that portion of each facing regions which is associated with the narrower-width portion is not less than ⅓ but not more than ⅔ of a length of the facing regions.