Patent ID: 8168477

Claim:
A method for enhancing a heat dissipation of a MOSFET package for containing a MOSFET chip having a flat surface electrode, the method comprising: distributing a plurality of conductive traces on multiple layers of a laminated board and connecting said conductive traces disposed on different layers to a via connector penetrating through said multiple layers with said via connector further connected to a top and bottom patterned metal plates and forming a solder mask covering over an extensive area on a bottom surface-of said laminating board next to the bottom patterned metal plate; face-to-face attaching said flat-surface electrode of said MOSFET chip to said bottom patterned metal plate of said laminated board for dissipating heat generated by said MOSFET chip through said bottom patterned metal plate and said via connector and said conductive traces; forming said electronic package with a plurality of ball grid array (BGA) solder pads disposed at outer edges of said soldering surface separated from said solder mask and a plurality of solder balls soldered onto said BGA solder pads disposed on the outer edges of the soldering surface; and forming solder bumps on said MOSFET chip extend vertically from a top surface opposite said flat-surface electrode of said MOSFET chip and extended vertically upward to substantially a same vertical level as said solder balls for conveniently mounting together with said solder balls onto terminals disposed on a top-mounting print circuit board.