Semiconductor device having an electrostatic discharging protection circuit using a non-ohmic material
US5889308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Aug 8, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/19107
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
Disclosed is a semiconductor device capable of protecting an internal circuit from an ESD impact, damage and a mistaken working caused by an electrostatic discharge, a surge pulse and a noise, and more particularly to a semiconductor device capable of protecting an internal circuit from an external abnormal input without a protection circuit. The semiconductor device includes a varistor coupled to a conductor for discharging an abnormal input signal input to a ground voltage level. The varistor acts as a conductor when an input signal is an abnormal input signal and acts as an insulator when the input signal is a normal input signal. The use of the varistor may provide an improved ESD protection circuit and then promote the reliability of the semiconductor device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.