Apparatus for electro-static discharge protection in a semicondu

Details Apparatus for electro-static discharge protection in a semicondu Apparatus for electro-static discharge protection in a semicondu

1995-10-30

1997-09-23

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361111, H02H 900

Patent

active

056711115

ABSTRACT:
An electro-static discharge (ESD) protection circuitry 100 with a gate-capacitor-coupled (GCC) device 120 or 125 and a silicon controlled rectifier (SCR) 130 or 135 coupled to an output 101 of an output device 116 or 117 in a sub micron metal oxide semiconductor circuit is disclosed. The GCC device 120 or 125 has a lower ESD breakdown voltage than the output device 116 or 117, hence, the GCC device 120 or 125 breaks down and causes the SCR 130 or 135 to breakdown when a destructive ESD voltage impinges on the out put 101 of the output device 116 or 117. The SCR 130 or 135 upon breaking down, discharges the destructive ESD to the power supply bus VDD or VSS.

REFERENCES:
patent: 5289334 (1994-02-01), Ker et al.
patent: 5359211 (1994-10-01), Croft
patent: 5400202 (1995-03-01), Metz et al.
patent: 5528188 (1996-06-01), Au et al.

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