Patent ID: 7952150

Claim:
An apparatus comprising: a substrate formed from a group III-V material system; an enhancement-mode MOSFET formed on the substrate and comprising a first body, a first source, a first drain and a first gate structure, which is provided on the first body and between the first source and the first drain, the first gate structure comprising a first gate contact and a first gate oxide, wherein the first gate oxide resides between the first gate contact and the first body and is an oxidized section of an oxidizable material that comprises Aluminum and Phosphorus; and a depletion-mode FET formed on the substrate and comprising a second body, a second source, a second drain and a second gate structure, which is provided on the second body and between the second source and the second drain, wherein the enhancement-mode MOSFET comprises a first sub-gate area that resides within the first body and below the first gate structure and is doped with first dopant material, and the depletion-mode FET comprises a second sub-gate area that resides within the second body and below the second gate structure and is doped with the first dopant material such that the first sub-gate area is sufficiently doped to cause the enhancement-mode MOSFET to operate in an enhancement mode and the second sub-gate area is sufficiently doped to cause the depletion-mode FET to operate in a depletion mode.