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

Claim 8:
9. An apparatus comprising:
a semiconductor layer of p-type conductivity;
a lateral NPN transistor disposed in the semiconductor layer, the lateral NPN transistor including:
a collector implant disposed in the semiconductor layer, the collector implant being of n-type conductivity;
an emitter implant disposed in the semiconductor layer, the emitter implant being of n-type conductivity; and
a base implant disposed in the semiconductor layer adjacent to the emitter implant, the base implant being of p-type conductivity; and

an isolation trench disposed in the semiconductor layer in a base region of the lateral NPN transistor, the isolation trench being disposed between the collector implant and the emitter implant, and disposed between the collector implant and the base implant, wherein the isolation trench is not disposed between the emitter implant and the base implant, the isolation trench having a depth in the semiconductor layer that is greater than a depth of the emitter implant in the semiconductor layer, and greater than a depth of the collector implant in the semiconductor layer.