Semiconductor integrated circuit device having substrate potential detecting circuit less damaged by static charge propagated thereto through shared conductive line
US5812354A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1997 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Apr 22, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D89/601
Abstract
A semiconductor integrated circuit device communicates with an external device through signal terminals, and is powered through power terminals; protective circuits are respectively connected to the signal terminals for discharging static electric charge through a shared conductive line to the power terminal connected to a ground line, and a potential level of the semiconductor substrate is propagated through the shared conductive line to a detecting circuit for reversely biasing the semiconductor substrate at intervals; and an interrupting circuit discriminates isolating state of the power terminal from the ground line so as to cut off a current path between the shared conductive line and the detecting circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.