Patent ID: 11862511
Assignee: GLOBALFOUNDRIES U.S. INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A method comprising:
forming a trench isolation region in a first trench in a semiconductor substrate, wherein the semiconductor substrate includes a device layer, a buried insulator layer, and a handle substrate separated from the device layer by the buried insulator layer, and the first trench penetrates through the device layer and the buried insulator layer into the handle substrate;
forming a second trench in the trench isolation region that is surrounded by a dielectric material of the trench isolation region;
forming a plurality of openings that penetrate through the dielectric material to the handle substrate; and
forming a semiconductor layer positioned in the second trench of the trench isolation region, wherein the semiconductor layer comprises a single-crystal semiconductor material.