Active solid-state devices (e.g. – transistors – solid-state diode – Integrated circuit structure with electrically isolated... – Lateral bipolar transistor structure
Patent
1996-05-31
1998-08-04
Crane, Sara W.
Active solid-state devices (e.g., transistors, solid-state diode
Integrated circuit structure with electrically isolated...
Lateral bipolar transistor structure
257544, H01L 2900
Patent
active
057897980
ABSTRACT:
A semiconductor device has a p-n-p transistor structure having a collector implemented by a p.sup.- -substrate, a base formed as an n-diffused region in the surface region of the substrate, and an emitter formed as a p.sup.+ -diffused region in the first n-diffused layer. The p.sup.- -substrate and the n-base are maintained at a ground level, while the p.sup.+ -collector is maintained at a positive potential for biasing the p-n junction formed between the emitter and the base. The bias potential allows the p-n-p transistor structure to operate in its saturation region to activate the base region to define an enlarged carrier-incresed zone. An analog input pad is located within the carrier-increased zone and protected from a noise propagated from a digital circuit section located outside the carrier-increased zone.
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Cao Phat X.
Crane Sara W.
NEC Corporation
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