Patent ID: 11916152
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. A method of forming a Schottky diode in an integrated circuit, comprising:
forming a guard ring in a semiconductor layer over a substrate, the guard ring having a first conductivity type, the guard ring including a continuous closed path that encloses a central area, and further including guard ring projections having the first conductivity type extending from the guard ring into the enclosed central area;
forming a drift region in the central area of the semiconductor layer, the drift region having a second conductivity type opposite from the first conductivity type;
forming barrier regions having the second conductivity type that extend from the drift region between the guard ring projections; and
forming a metal-containing layer that has a Schottky barrier with the barrier regions.