Other

Hitachi, Ltd.

Hitachi Yonezawa Electronics Co., Ltd

Shouichi Kobayashi

Yoshihiko Yamaguchi

Kouji Tsuchiya

Takao Matsuura

The semiconductor device comprises: a tub for supporting a semiconductor chip; a sealing body formed by sealing the semiconductor chip with a resin; a plurality of leads made of a copper alloy, exposed to the back face of the sealing body, and having a soldered layer on the exposed mounted face; and wires for connecting the pads of the semiconductor chip and the corresponding leads. In the manufacture method, the sealing body is polished, after resin-molded, at its back face with a brush to form the two widthwise edge portions, as exposed from the back face of the sealing body, of the lead into rounded faces, and the mounted face of the lead including the rounded faces is protruded at its central portion from the back face of the sealing body thereby to improve the connection reliability at the packaging time.

Growing community of inventors

Yonezawa, Japan

Shouichi Kobayashi