Patent ID: 9508552
Filing Date: 2016-11-29
CPC Classification: H01L

Claim Text:
1. A method of providing a transistor having an emitter, a base, and a collector comprising: forming a metallic sub-collector on the collector, the metallic sub-collector electrically and thermally coupled to the collector, wherein the metallic sub-collector comprises a metallic thin film; forming a collector contact electrically connected to the metallic sub-collector; bonding the metallic sub-collector to a substrate with an adhesion layer consisting of a single material, wherein the adhesion layer is between the substrate and the metallic sub-collector and bonded directly to the substrate and directly to the metallic sub-collector; and forming a thermal via coupled to the metallic sub-collector and coupled to the substrate for thermally coupling the metallic sub-collector to the substrate, wherein the thermal via contacts a top surface of the substrate through an opening in the adhesion layer.