Resin sealing type semiconductor device having thin portions formed on the leads

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United States of America Patent

PATENT NO 5777380
SERIAL NO

08615869

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Abstract

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A resin sealing type semiconductor device includes a radiator, a semiconductor element, a frame lead arranged at a distance around this semiconductor element and displaced from the radiator, and a plurality of leads extending from this frame lead and attached to a mounting surface with a insulating lead support therebetween. The leads are pressed downward by an upper mold so that the radiator is pressed against a lower mold in such a manner that resin cannot seep therebetween. Thin portions are formed in the leads to ensure that the leads do not peel away from the insulating lead support.

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Patent Owner(s)

  • SEIKO EPSON CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ito, Tadami Suwa, JP 1 21
Otsuki, Tetsuya Suwa, JP 45 489

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