Electrostatic discharge protective circuit having high trigger current

An electrostatic discharge protection and trigger current technology, applied in circuits, electrical components, electrical solid devices, etc., can solve the problems of unacceptable or sending signals, small trigger current, latching, etc., to avoid latching effect, good ESD The effect of protective ability
CN1248310CInactive Publication Date: 2006-03-29WINBOND ELECTRONICS CORP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
WINBOND ELECTRONICS CORP
Publication Date
2006-03-29
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The electrostatic protecting circuit includes one semiconductor controlled rectifier (SCR) and one bipolar transistor in MOS structure. The SCR includes one anode, one anode / grid, one cathode / grid and one cathode, the anode is coupled to the first joint soldering pad, and the cathode / grid and the cathode are coupled to the second soldering pad. The bipolar transistor has one collector and one emitter, of which one is coupled to the anode / grid and the other to the second joint soldering pad. The electrostatic protecting circuit has relatively great triggering current to block the SCR, so that it can avoid accident blocking caused by noise during normal operation.
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Description

technical field

[0001] The present invention relates to an electrostatic discharge (ESD) protection circuit using a semiconductor controlled rectifier (SCR), especially an ESD protection circuit with high trigger current. Background technique

[0002] ESD has been one of the important reliability measurement standards in semiconductor products, especially for downsized complementary metal oxide semiconductor (complementary metal oxide semiconductor, CMOS) technology. Because the breakdown voltage of the gate oxide layer of metal oxide semiconductor transistors (metal oxide semiconductor, MOS) becomes lower with the progress of manufacturing technology, therefore, setting up an ESD protection circuit at each input and output port is to prevent ESD stress from affecting gate oxidation. One of the effective ways to cause damage to layers. Because of its very low holding voltage, SCRs are often used as ESD protection components. figure 1 It is a schematic cross-sectional view ...

Claims

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