Patent ID: 9252143
Filing Date: 2016-02-02
CPC Classification: G09G,H01L,H03F

Claim Text:
1. A Field Effect Transistor (FET) cascode device comprising: a compound semiconductor layer; an ohmic metal layer comprising: a plurality of ohmic metal input drain fingers and output drain fingers disposed on a surface of the compound semiconductor layer, a plurality of ohmic metal input source fingers and output source fingers disposed on the surface of the compound semiconductor layer, the input source fingers alternating with the input drain fingers, and the output source fingers alternating with the output drain fingers, each of the plurality of input drain fingers integrally connected to a corresponding output source finger of the plurality of output source fingers, the input drain finger and corresponding, connected output source finger forming a continuous ohmic metal finger, a plurality of input gate fingers, each disposed on the surface of the compound semiconductor layer between adjacent input drain and source fingers, a plurality of output gate fingers, each disposed on the surface of the compound semiconductor layer between adjacent output drain and source fingers, a plurality of first and second input gate pads disposed at opposite ends of the plurality of input gate fingers to form a serpentine path, each of the first and second input gate pads configured to couple an input gate signal to two of the input gate fingers, each of the plurality of first input gate pads disposed between one of the plurality of input source fingers and a respective output drain finger, and a plurality of first and second output gate pads disposed at opposite ends of the plurality of output gate fingers to form a serpentine path, each of the first and second output gate pads configured to couple an output gate signal to two of the output gate fingers, each of the plurality of first output gate pads disposed adjacent at least one of the first input gate pads and between one of the plurality of input source fingers and a respective output drain finger; and a first metal layer comprising: