Self detection device for high voltage ESD protection
US8519434B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2011 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Feb 27, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D62/378
Abstract
An electrostatic discharge (ESD) protected device may include a substrate, an N-type well region disposed corresponding to a first portion of the substrate and having two N+ segments disposed at a surface thereof, an a P-type well region disposed proximate to a second portion of the substrate and having a P+ segment and an N+ segment. The two N+ segments may be spaced apart from each other and each may each be associated with an anode of the device. The N+ segment may be associated with a cathode of the device. A contact may be positioned in a space between the two N+ segments and connected to the P+ segment. The contact may form a parasitic capacitance that, in connection with a parasitic resistance formed in association with the N+ segment, provides self detection for high voltage ESD protection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.