Patent ID: 11901216
Assignee: STMICROELECTRONICS (CROLLES 2) SAS
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. An electronic device, comprising:
a substrate including a solid semiconductor region and a semiconductor on insulator region;
a cavity in the solid semiconductor region of the substrate;
an insulating layer lining sidewalls of the cavity;
wherein the cavity includes an upper portion and a lower portion;
wherein the sidewalls of the cavity include a change in slope at a level of a change from the lower portion to the upper portion;
wherein the level of change from the lower portion to the upper portion corresponds to a level of an insulator layer of the semiconductor on insulator region; and
wherein sidewalls of the insulating layer adjacent the upper portion of the cavity define a rounded shape.