ESD protection circuit with high substrate-triggering...

Details ESD protection circuit with high substrate-triggering... ESD protection circuit with high substrate-triggering...

2005-02-22

2005-02-22

Tran, Minhloan (Department: 2826)

Active solid-state devices (e.g., transistors, solid-state diode

Field effect device

Having insulated electrode

C257S355000, C257S356000, C257S358000, C361S056000

Reexamination Certificate

active

06858901

ABSTRACT:
An ESD protection circuit with high substrate-triggering efficiency. The circuit comprises a multi-finger-type device having a plurality of finger gates below which a parasitic BJT is formed, a plurality of finger sources, each of which is an emitter of one parasitic BJT, and at least one finger drain coupled to a pad, a plurality of voltage drop elements, each of which is coupled between one of the finger sources and a power line to detect a transient current flowing through one of the finger gates, and a plurality of feedback circuits, each of which is coupled between a base and an emitter respectively of a first and second parasitic BJT, and activates the first BJT to bypass ESD current during an ESD event.

REFERENCES:
patent: 20020033507 (2002-03-01), Verhaege et al.

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