Device for detecting an attack in an integrated circuit chip
US8946859B2 · kind B2 · utility
16Cited by
2References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2012 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Jan 2, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D84/854
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
An integrated circuit chip including a plurality of parallel wells of alternated conductivity types formed in the upper portion of a semiconductor substrate of a first conductivity type, and a device of protection against attacks including: between the wells, trenches with insulated walls filled with a conductive material, said trenches extending from the upper surface of the wells to the substrate; and a circuit capable of detecting a modification of the stray capacitance formed between said conductive material and a region of the chip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.