Patent ID: 9721909
Date: 2017-08-01
CPC Classifications: H01L

Claim:
1. A radio frequency (RF) integrated circuit comprising: a first layer of semiconductor material, having formed therein, a high electron mobility transfer (HEMT) device; a first semiconductor heat spreader substrate configured to support the first layer of semiconductor material; a pair of matching circuits configured to be electrically connected to the HEMT device, wherein the pair of matching circuits are supported on a semiconductor substrate comprising a semiconductor material different than the semiconductor material of the first semiconductor heat spreader substrate, wherein the first layer of semiconductor material and the first semiconductor heat spreader substrate have a thickness that is less than a second thickness of the semiconductor substrate supporting the pair of matching circuits; and a conductive layer disposed on a surface of the first semiconductor heat spreader substrate opposite the HEMT device, wherein the first semiconductor heat spreader substrate has defined therethrough at least one conductive via in electrical communication with the conductive layer and at least one electrode of the HEMT device.