Patent ID: 9589927
Date: 2017-03-07
CPC Classifications: H01L,H03F

Claim:
1. A packaged radio frequency (RF) amplifier device comprising: a device substrate having a top substrate surface; a transistor die, wherein the transistor die includes a top die surface, a bottom die surface coupled to the top substrate surface, a semiconductor substrate, first and second transistors formed in the semiconductor substrate, a conductive structure at the top die surface and positioned between the first and second transistors, and a low resistance path that extends vertically through the semiconductor substrate between the conductive structure and the bottom die surface, wherein the first transistor forms a portion of a first signal path through the device, and the second transistor forms a portion of a second signal path through the device; and an isolation structure coupled to the conductive structure and extending into an area above the top die surface between the first and second transistors, wherein the isolation structure reduces inductive coupling between the first and second signal paths.