Patent ID: 8278742
Filing Date: 2012-10-02
Classification: H01L

Abstract:
1. A method of packaging a semiconductor device comprising the steps of: providing a lead frame having input and output lead pads and a central die attach region for receiving and holding a semiconductor die; applying a first adhesive die attach material to the central die attach region of the lead frame; attaching one surface of the semiconductor die to the central die attach region of the lead frame; wire bonding regions of the semiconductor die to the input and output lead pads of the lead frame; applying a second adhesive to another surface of the semiconductor die and to the lead frame; providing an upper heat sink with an annular base having an inner boundary surrounding a central protruding portion and a perimeter, a plurality of sloped wall members extending from the inner boundary of the annular base to the central protruding portion and support arms on the perimeter of the annular base, said upper heat sink having an interior surface and an exterior surface; placing the interior surface of the upper heat sink in contact with the second adhesive on the another surface of the semiconductor die to attach the upper heat sink to the another surface of the semiconductor die and to attach the support arms of the upper heat sink to the lead frame; and encapsulating the die and lead frame to leave exposed the exterior surface of the heat sink and surfaces of the input and output lead pads.