Patent ID: 8159002

Claim:
A device, comprising: a semiconductor multi-layer structure including a first layer comprising a buffer layer and a second layer comprising a barrier layer, the semiconductor multi-layer structure having a first region coupled to a source electrode, a second region coupled to a drain electrode, and a third region disposed between the first region and the second region, wherein the third region is coupled to a gate electrode and provides a switchable electrically conductive pathway from the source electrode to the drain electrode, and wherein the third region comprises iodine ions implanted into the barrier layer of the semiconductor multi-layer structure; wherein the barrier layer comprises an epitaxially grown aluminum gallium nitride layer and the buffer layer comprises a gallium nitride layer; and wherein the third region comprises iodine ions implanted into the aluminum gallium nitride layer so as to provide a switchable electrically conductive pathway from the source electrode to the drain electrode.