Patent ID: 9214534
Filing Date: 2015-12-15
Classification: H01L

Abstract:
1. A lateral bipolar transistor, comprising: a semiconductor substrate of a first conductivity type; a first buried layer of the first conductivity type and a second buried layer of a second conductivity type both formed on the substrate, the second conductivity type being opposite the first conductivity type; a first epitaxial layer of the second conductivity type formed on the substrate; third, fourth, and fifth buried layers of the first conductivity type formed in the first epitaxial layer, the third buried layer being formed in vertical alignment with the first buried layer, the fourth and fifth buried layers being positioned above and separated from the second buried layer; a second epitaxial layer of the second conductivity type formed on the first epitaxial layer; and first, second and third sinker regions of the first conductivity type formed in the second epitaxial layer, the first sinker region being in vertical alignment with the third buried layer, the second sinker region being in vertical alignment with the fourth buried layer, and the third sinker region being in vertical alignment with the fifth buried layer, wherein the first buried layer, the third buried layer and the first sinker region form a contiguous diffusion region of the first conductivity type and function as an isolation structure, the fourth buried layer and the second sinker region form a contiguous diffusion region of the first conductivity type and function as an emitter region, the fifth buried layer and the third sinker region form a contiguous diffusion region of the first conductivity type and function as a collector region, a base region being formed in the first and second epitaxial layers between the emitter and collector regions.