Patent ID: 9214419
Filing Date: 2015-12-15
Classification: H01L

Abstract:
1. A preparation method of a power semiconductor device, the preparation method comprising the steps of: providing a lead frame containing a plurality of chip mounting units, wherein one side edge of a die paddle of each chip mounting unit is bent and extended upwardly and one lead connects to the bent side edge of the die paddle and is horizontally extended out in an opposite direction from the die paddle; attaching a semiconductor chip to a top surface of the die paddle; forming metal bumps on each electrode at a front of the semiconductor chip with a top end of each metal bump protruding out of a plane of a top surface of the lead; heating the metal bump and pressing the top end of each metal bump by a pressing plate forming a flat top end surface that is coplanar with the top surface of the lead; and cutting the lead frame to separate individual chip mounting units.