Pad protection diode structure
US5432368A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1993 |
| Grant date | Jul 11, 1995 |
| Priority date | — |
| Expiry date | Jun 24, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D89/611
Abstract
A diode structure for protecting a pad in an integrated circuit formed in a P-type substrate coupled between a first supply terminal connected to the substrate and a second supply terminal. The structure includes a P-type pocket whose edges and bottom contact an N-type region, an N-type area formed in the pocket, an N-type ring laterally surrounding the region of the second conductivity type and contacting the substrate, and a P-type well surrounding the ring. The ring and the pocket are connected to the pad, the N-type area formed in the pocket is connected to the second supply terminal and the well is connected to the first supply terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.