Patent ID: 7838985

Claim:
A semiconductor assembly, comprising: i. a first subassembly comprising; a heat sink; a first patterned polymer layer disposed on a surface of the heat sink to define an exposed portion of the first surface, said exposed portion of the first surface extending radially inward along the heat sink surface from the first layer; a second patterned polymer layer disposed on top of a radially outer portion of the first patterned polymer layer, said first and second layers defining a cell for accommodating a power semiconductor die; ii. solder material disposed on the exposed portion of the heat sink surface and in the cell; and iii. a power semiconductor die, located within the cell mounted on a radially inward portion of the first patterned polymer layer on a portion of the first patterned polymer layer that is not covered by the second patterned polymer layer, and thermally coupled to the heat sink by the solder material.