Patent ID: 11869946
Assignee: MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A transistor, comprising:
a source;
a gate;
a drain;
a semiconductor region under the source, the gate and the drain, such that the semiconductor region includes a gallium nitride (GaN) layer and a three nitride (III-N) layer, wherein GaN layer includes a band gap, and the III-N layer includes a band gap, such that the III-N layer band gap is higher than the GaN layer band gap, wherein the GaN layer and the III-N layer are undoped; and
a sub-region of the semiconductor region underneath the gate is doped with Mg ions at selective locations in the sub-region, wherein each of the selective locations doped with Mg ions in the sub-region has a profile, such that the profile includes a vertical profile length and a profile width, and wherein the profiles form a pattern, such that profile widths of the profiles increase along a direction from a first width end to a second width end of the field effect transistor.