Early trigger of ESD protection device by a current spike genera

Details Early trigger of ESD protection device by a current spike genera Early trigger of ESD protection device by a current spike genera

1997-10-22

1999-02-09

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transient responsive

361 56, 257355, H02H 322

Patent

active

058702687

ABSTRACT:
A transient switching circuit is provided to generate a voltage signal with fast voltage switching phenomenon during the initial ESD transient. The voltage signal is applied to a current spike generator for generating a current spike which forward bias an n+/pwell diode for injecting minority carriers into a substrate on which ESD protection device is embodied. The injected minority carriers are used to trigger turn-on of the ESD protection device. 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: 5173755 (1992-12-01), Co et al.
patent: 5218222 (1993-06-01), Roberts
patent: 5272371 (1993-12-01), Bishop et al.
patent: 5290724 (1994-03-01), Leach
patent: 5508224 (1996-04-01), Jang
patent: 5545910 (1996-08-01), Jang
patent: 5565790 (1996-10-01), Lee
patent: 5719733 (1998-02-01), Wei et al.
patent: 5745323 (1998-04-01), English
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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