Patent ID: 8564110

Claim:
A power device with bottom source electrode comprising: a lead frame unit comprising a first base and a second base separated from each other, a third base and a fourth base located at two opposite sides of the first base; a primary packaging structure attached to the first base and the second base, the primary packaging structure comprising a front surface and a plurality of solder bumps formed thereon, said solder bumps being further attached respectively to the first base and the second base; a bridge-shaped metal clip attached atop the primary packaging structure, the bridge-shaped metal clip comprises a top metal portion and side metal portions that are: connected to two opposite sides of the top metal portion; and are bent downwards such that a first predetermined members of the side metal portions are positioned and trapped into a groove formed on the top surface of the third base and a second predetermined members of the side metal portions are aligned and positioned and trapped into a groove formed on the top surface of the fourth base; a bottom metal layer formed at a back surface of the primary packaging structure and connected to a bottom surface of the top metal portion through a conductive material; and a plastic packaging body encapsulating the lead frame unit, the primary packaging structure and the bridge-shaped metal clip, wherein the bottom surfaces of the first base, the third base and the fourth base are all exposed through the bottom surface of the plastic packaging body.