Patent ID: 7402844

Claim:
A unit cell of a metal-semiconductor field-effect transistor (MESFET), comprising: a MESFET having a source, a drain and a gate, the gate being between the source and the drain and on a channel layer of the MESFET, the channel layer having a first thickness on a source side of the channel layer and a second thickness, thicker than the first thickness, on a drain side of the channel layer; and a recess between the source and the drain that exposes the channel layer, the recess having a first depth on a source side of the recess that defines the first thickness of the channel layer and a second depth on a drain side of the recess that defines the second thickness of the channel, the gate being disposed in the recess, wherein the first depth is from about 700 Å to about 2200 Å and the second depth is from about 500 Å to about 1500 Å.