Early trigger of ESD protection device by an oscillation circuit

Details Early trigger of ESD protection device by an oscillation circuit Early trigger of ESD protection device by an oscillation circuit

1997-10-22

1998-12-22

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transient responsive

361 56, 257355, H02H 322

Patent

active

058525416

ABSTRACT:
A transient oscillating circuit is provided to generate a series of current pulses for triggering turn-on of an ESD protection device. As VDD-to-VSS voltage increases rapidly in the initial ESD event, the series of current pulses injects minority carriers into the pwell of an NMOS transistor via an adjacent n+/pwell diode. These minority carriers flow toward the drain-substrate junction of the NMOS transistor such that the NMOS transistor is triggered at a trigger voltage lower than that provided by the prior arts. The present invention improves the ESD performance of an ESD protection device, such as a MOSFET or bipolar transistor, which is provided for protecting the power bus or IC pins during an ESD event.

REFERENCES:
patent: 4503448 (1985-03-01), Miyasaka
patent: 4958121 (1990-09-01), Cuomo et al.
patent: 5218222 (1993-06-01), Roberts
patent: 5272371 (1993-12-01), Bishop et al.
patent: 5290724 (1994-03-01), Leach
patent: 5313111 (1994-05-01), Walker et al.
patent: 5508224 (1996-04-01), Jang
patent: 5545910 (1996-08-01), Jang
patent: 5708549 (1998-01-01), Croft
A. Amerasekera, et al., Substrate Triggering and Salicide Effects on ESD Performance and Protection Circuit Design in Deep Submicron CMOS Processes, IEDM-95, pp. 547-550.
A. Amerasekera, et al., ESD in Silicon Integrated Circuits, John Wiley & Sons, pp. 40-48 and 68-72.

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