Patent ID: 9275972
Filing Date: 2016-03-01
CPC Classification: H01L

Claim Text:
1. A resin-encapsulated semiconductor device, comprising: a die pad portion; a semiconductor element mounted on the die pad portion; a plurality of lead portions arranged so as to be opposed to at least two sides of the die pad portion; thin metal wires connecting the plurality of lead portions to a plurality of electrodes provided on a surface of the semiconductor element; and an encapsulation resin for encapsulating the die pad portion, the semiconductor element, and the plurality of lead portions in a manner that the plurality of lead portions are partially exposed, wherein the plurality of lead portions each comprise a lead bottom surface part that is a bottom surface exposed from the encapsulation resin, a lead outer surface part that is a leading end, and a lead upper end part that is a part of an upper surface, wherein the lead bottom surface part is flush with a bottom surface of the encapsulation resin, wherein the lead bottom surface part and the lead upper end part each have a plating layer formed thereon at a region of the lead portion that has a uniform thickness, and wherein the encapsulation resin has a cutout on a side surface thereof vertically above a portion of the lead upper end part on which the plating layer is formed.