Patent ID: 9633934
Date: 2017-04-25
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising: a first semiconductor substrate with first external connections located on a first side of the first semiconductor substrate; a first plurality of through vias extending through an encapsulant, wherein the encapsulant separates the first semiconductor substrate from the first plurality of through vias; a metal layer covering a second side of the first semiconductor substrate opposite the first side, wherein the metal layer does not extend over the first plurality of through vias; a die attach film disposed on the metal layer; a polymer layer disposed on the die attach film; a backside protection layer disposed on the polymer layer; and a thermally conductive protective feature extending through the backside protection layer, the polymer layer, the die attach film such that the thermally conductive protective feature physically contacts the metal layer, the thermally conductive protective feature formed of a different material than the metal layer, wherein the thermally conductive protective feature has a first portion having a first width a second portion having a second width that is different than the first width.