Semiconductor integrated circuit having an SOI structure, provided with a protective circuit
US5786616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1997 |
| Grant date | Jul 28, 1998 |
| Priority date | — |
| Expiry date | Sep 10, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D86/201
Abstract
A SOI semiconductor integrate circuit device, which can protect against surges between a signal-input terminal and power-supply input terminal thereof to obtain an improved electrostatic withstand quantity, is disclosed. An inverter circuit which is an integrated circuit is formed in a thin-film semiconductor layer formed through an insulation film on a p-type silicon substrate. An n-type diode diffusion region, resistor diffusion region, and FET diffusion region are formed within the silicon substrate. An input portion of the inverter circuit is connected through the resistor diffusion region to a signal-input terminal IN. A power-supply input terminal VC is connected to a ground terminal GND through a reverse-biased diode D formed by the diode diffusion region. When surge is applied to the signal-input terminal IN, a parasitic diode DD composed by the resistor diffusion region and silicon substrate exhibits avalanche breakdown and surge voltage is bypassed. An electrostatic withstand quantity of the inverter circuit can be increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.