Patent ID: 11881404
Assignee: QROMIS, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of forming a p-type gallium nitride layer, the method comprising:
providing a substrate structure including an epitaxial gallium nitride layer;
sputtering a dopant source including magnesium onto the epitaxial gallium nitride layer;
patterning the dopant source to form a patterned dopant source region and one or more openings to the epitaxial gallium nitride layer;
depositing a dielectric capping structure over the patterned dopant source region and the one or more openings;
thereafter, annealing the substrate structure at a temperature ranging from about 1000° C. to about 1400° C. to diffuse magnesium into the epitaxial gallium nitride layer;
removing the dielectric capping structure and the patterned dopant source region; and
thereafter, activating the diffused magnesium to form the p-type gallium nitride layer.