Patent ID: 8686546
Filing Date: 2014-04-01
Classification: H01L

Abstract:
1. A combined packaged power semiconductor device, comprising: a high-side (HS) MOSFET and a low-side (LS) MOSFET, each of said HS and LS MOSFETs comprising a bottom drain, a top gate and a top source; a lead frame comprising a die paddle and a plurality of pins separated and electrically insulated from said die paddle, wherein said LS MOSFET is flipped and stacked on said die paddle forming an electrical connection between said LS source and a top surface of said die paddle, as such said LS source is electrically connected to an exposed bottom surface of said die paddle; a first metal interconnection plate stacked on said drain of said LS MOSFET, wherein said HS MOSFET directly stacked or flipped first and then stacked on said first metal interconnection plate, forming an electrical connection between said HS drain or flipped HS source and said LS drain through said first metal interconnection plate; a second metal interconnection plate stacked and electrically connected to said source of said HS MOSFET or said drain of said flipped HS MOSFET; an integrated circuit (IC) controller stacked on said die paddle, said IC controller comprising a plurality of electrodes, wherein electrical connections between said pins, said electrodes on said IC controller and electrodes of HS and LS MOSFETs are formed; and wherein said plurality of pins include a LS gate pin comprising an outer portion and an inner portion with a top surface of the inner portion being coplanar to the top surface of the die paddle, and wherein a matching gap is formed at a side of said die paddle at a corresponding position in said inner portion to separate said gate pin from said die paddle, and said LS MOSFET is stacked on said inner portion and forming an electrical connection with said LS gate pin.