Patent ID: 11887981
Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. An apparatus comprising:
a semiconductor layer of n-type conductivity;
a lateral silicon-controlled rectifier (SCR) disposed in the semiconductor layer, the lateral SCR including:
a first p-type implant disposed in the semiconductor layer, the first p-type implant being included in an emitter of a PNP transistor of the lateral SCR;
a first n-type implant disposed in the semiconductor layer, the first n-type implant being included in a base of the PNP transistor and a collector of an NPN transistor of the lateral SCR;
a second p-type implant disposed in the semiconductor layer, the second p-type implant being included in a collector of the PNP transistor and a base of the NPN transistor; and
a second n-type implant disposed in the semiconductor layer, the second n-type implant being included in an emitter of the NPN transistor; and

an isolation trench disposed in the semiconductor layer in a base region of the PNP transistor and a collector region of the NPN transistor, at least a portion of the semiconductor layer being included in the base region of the PNP transistor and the collector region of the NPN transistor, wherein the isolation trench is not disposed between the second p-type implant and the second n-type implant, the isolation trench having a depth in the semiconductor layer that is greater than a depth of the first p-type implant in the semiconductor layer, greater than a depth of the first n-type implant in the semiconductor layer, greater than a depth of the second p-type implant in the semiconductor layer, and greater than a depth of the second n-type implant in the semiconductor layer.