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US 2014/0231963 A1Published application
Uni-directional transient voltage suppressor (tvs)
AssigneeAlpha and Omega Semiconductor Incorporated
InventorsLingpeng Guan, Madhur Bobde, Anup Bhalla
Life of this patent
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Abstract
A unidirectional transient voltage suppressor (TVS) device includes first and second NPN transistors that are connected in parallel to each other. Each NPN transistor includes a collector region, an emitter. The first and second NPN structures are formed on a common substrate. The first NPN transistor has a floating base and the second NPN transistor has a base shorted to an emitter.
Claims35
A unidirectional transient voltage suppressor (TVS) device comprising:
- first and second NPN transistors that are connected in parallel to each other, wherein each of the first and second NPN transistors includes a collector region, an emitter and a base, wherein the first and second NPN structures are formed on a common substrate, wherein the first NPN transistor has a floating base, and wherein the second NPN transistor has a base shorted to an emitter.
A method for manufacturing a unidirectional transient voltage suppressor (TVS) device, comprising:
- forming first and second NPN transistors that are connected in parallel to each other, wherein each of the first and second NPN transistors includes a collector region, an emitter and a base, wherein the first and second NPN structures are formed on a common substrate, wherein the first NPN transistor has a floating base, and shorting a base of the second NPN transistor to an emitter of the second NPN transistor.
Dependencies are inferred from the claim text.