Patent ID: 8119488

Claim:
A method of manufacturing a quantum well device comprising: forming a quantum well region, comprising: forming a buffer structure by epitaxial growth, the buffer structure overlying the substrate and comprising a semiconductor material having a first band gap, forming a channel structure by epitaxial growth, the channel structure overlying the buffer structure and comprising a semiconductor material having a second band gap, forming a barrier layer by epitaxial growth, the barrier layer overlying the channel structure and comprising an un-doped semiconductor material having a third band gap, wherein the first and the third band gap are wider than the second band gap, forming a gate region overlying a portion of the quantum well region; and forming a source region and a drain region self-aligned to the gate region by selective growth of a semiconductor material having a fourth band gap wider than the second band gap, wherein each of the source region and the drain region comprises a doped region.