Patent ID: 8878246

Claim:
A high electron mobility transistor (HEMT), comprising: a channel forming layer; a channel supplying layer on the channel forming layer, the channel supplying layer configured to induce a two-dimensional electron gas (2DEG) channel in the channel forming layer; a channel increase layer on the channel supplying layer, the channel increase layer defining an opening that exposes a portion of the channel supplying layer; source and drain electrodes on the channel increase layer; and a gate electrode on a first part of the portion of the channel supplying layer exposed by the opening of the channel increase layer, wherein the channel forming layer includes a lightly doped drain (LDD) region between the gate electrode and the drain electrode, the LDD region of the channel forming layer is below a second part of the portion of the channel supplying layer exposed by the opening of the channel increase layer, and a segment of the channel increase layer extends from contacting a sidewall of the gate electrode to a region between the source electrode and the channel supplying layer.