Security chip
US8410583B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2008 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Jun 30, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A security chip is disclosed. The security chip includes: a substrate; an integrated circuit disposed on the substrate, the integrated circuit including circuit elements, circuit interconnect layers connecting the circuit elements together, and interlayer contacts supporting the circuit interconnect layers; a shield to at least partially shield the integrated circuit; and at least one lightwell in the shield and the integrated circuit, wherein each lightwell has a closed shape formed from parts of the circuit interconnect layers and interlayer contacts, wherein no exploitable voltage can be measured on the parts of the circuit interconnect layers and interlayer contacts, and wherein each lightwell forms a path for light to penetrate to the substrate preventing the light from reaching the circuit elements. Related apparatus and methods are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.