Patent ID: 8994159
Filing Date: 2015-03-31
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: (a) preparing a lead frame having a chip mounting portion and a plurality of leads; (b) mounting a semiconductor chip over a first main surface of the chip mounting portion; (c) electrically connecting a plurality of pads of an obverse surface of the semiconductor chip and an inner-lead portion of each of the plurality of leads via a plurality of metal wires, respectively; and (d) forming a sealing body resin-sealing the semiconductor chip, a part of the first main surface of the chip mounting portion not overlapped with the semiconductor chip, the inner-lead portion of each of parts of the plurality of leads, and the plurality of metal wires, wherein, in the step (d), the sealing body is formed such that a second main surface opposite a first main surface of the chip mounting portion is exposed from the sealing body and an outer-lead portion of each of the plurality of leads is projected from the sealing body, and wherein a roughness of the first main surface of the chip mounting portion is greater than both a roughness of the second main surface of the chip mounting portion and a roughness of a surface of the inner-lead portion of each of the plurality of leads.