Semiconductor integrated circuit device
US5416661A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1993 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Feb 19, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D89/811
Abstract
A semiconductor integrated circuit device is equipped with a built-in power supply voltage conversion circuit which converts an external power supply voltage into an internal, lower voltage and supplies the internal voltage to internal circuits, and a clamping element which is inserted between an external power supply wiring connected to an external power supply pin and at least one of an input pin and an internal power supply wiring serving as an output line of the power supply voltage conversion circuit. As a result of distribution of electric charge to the capacitor formed between the internal power supply wiring and the substrate due to operation of the clamping element caused by the application of an overvoltage, it is possible to obtain an electrostatic withstand voltage comparable to that of a semiconductor integrated circuit device which lacks a built-in power supply voltage conversion circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.