Device for protecting an integrated circuit chip against attacks
US8796765B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2012 |
| Grant date | Aug 5, 2014 |
| Priority date | — |
| Expiry date | Jun 13, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D84/854
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
An integrated circuit chip includes: a plurality of parallel wells of alternated conductivity types formed in the upper portion of a semiconductor substrate of a first conductivity type; in each well of the first type, a plurality of MOS transistors having a channel of the second conductivity type, and in each well of the second type, a plurality of MOS transistors having a channel of the first type, transistors of neighboring wells being inverted-connected; and a device of protection against attacks, including: a layer of the second type extending under said plurality of wells, from the lower surface of said wells; and regions of lateral insulation between the wells, said regions extending from the upper surface of the wells to said layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.