Device for detecting a laser attack in an integrated circuit chip
US9070697B2 · kind B2 · utility
1Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2014 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Nov 3, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D84/615
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A device for detecting a laser attack made on an integrated circuit chip comprises a bipolar transistor of a first type formed in a semiconductor substrate, that bipolar transistor comprising a parasitic bipolar transistor of a second type. A buried region, forming the base of the parasitic bipolar transistor, operates as a detector of the variations in current flowing caused by impingement of laser light on the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.