Patent ID: 11869964
Assignee: WOLFSPEED, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 23:
24. A transistor device, comprising:
a semiconductor epitaxial layer structure including a channel layer and a barrier layer on the channel layer, wherein the barrier layer has a higher bandgap than the channel layer;
a modified access region at an upper surface of the barrier layer opposite the channel layer, wherein the modified access region comprises a region of increased conductivity relative to a conductivity of the barrier layer at an upper surface of the barrier layer opposite the channel layer, and wherein the modified access region comprises an implanted region comprising implanted dopants at the upper surface of the barrier layer opposite the channel layer;
a source contact and a drain contact on the barrier layer; and
a gate contact between source contact and the drain contact.