Segmented silicon-control-rectifier (SCR) electrostatic discharge (ESD) protection circuit
US5880488A · kind A · utility
22Cited by
7References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1996 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Sep 25, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D89/713
Abstract
A segmented SCR ESD protection circuit for discharging an external electrostatic stress on a semiconductor integrated circuit is formed over a semiconductor substrate. The protection circuit includes an SCR device and a number of resistors. The SCR device is separated into a plurality of SCR segments for suppressing the occurrence of the secondary breakdown. Each of the resistors is connected to one of the SCR segments. The resistors can be in the form of parasitic resistances of the SCR device or in the form of additional electronic components formed on the semiconductor substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.