ESD protection device with high voltage and negative voltage tolerance
US7049663B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 2004 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Dec 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D89/711
Abstract
An electrostatic discharge protection device with high voltage and negative voltage tolerance is provided. The electrostatic discharge protection device comprises: a first type substrate; a first type well inside the first type substrate, the first type well being floating; a second type well inside the first type substrate, the second type well separating the first type well from the first type substrate, the second type well being coupled to a first voltage line; a second type first doped region inside the first type well and coupled to a second voltage line; a second type second doped region inside the first type well and coupled to the pad; and an isolation structure between the second type first doped region and the second type second doped region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.