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Method for transfer molding encapsulation of a semiconductor die with attached heat sink

  • US 6,001,672 A
  • Filed: 02/25/1997
  • Issued: 12/14/1999
  • Est. Priority Date: 02/25/1997
  • Status: Expired due to Term
First Claim
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1. A method of packaging a semiconductor device assembly, comprising:

  • forming a heat sink having a top surface and a bottom surface, each top and bottom surface having peripheral edges therearound and central portions thereof;

    forming a protrusion at the peripheral edges of the bottom surface of the heat sink away from the central portion of the bottom surface of the heat sink;

    positioning the top surface of the heat sink adjacent to a semiconductor device having a plurality of bond pads thereon; and

    placing the heat sink and semiconductor device in a transfer molding apparatus with the protrusion formed at the peripheral edges of the bottom surface of the heat sink in contact with a portion of the transfer molding apparatus.

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