Patent ID: 6403387
Filing Date: 2002-06-11
Classification: H01L

Abstract:
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; forming a substantially continuously formed protruding edge from the heat sink at the peripheral edges of the bottom surface of the heat sink; positioning a semiconductor device separated from a heat sink through a portion of a lead frame; positioning the top surface of the heat sink adjacent to a semiconductor device having a plurality of bond pads thereon; placing the heat sink and semiconductor device in a transfer molding apparatus having the protruding edge formed at the peripheral edges of the bottom surface of the heat sink in contact with a portion of the transfer molding apparatus; and removing the dam from adjacent to the surface of the heat sink following the encapsulation of the semiconductor device and the heat sink.