Semiconductor device, carrier, card reader, methods of initializing and checking authenticity
US7288834B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Dec 8, 2005 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Feb 23, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S257/922
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The semiconductor device has a security coating with embedded magnetic particles and magnetoresistive sensors. This renders possible a measurement of the impedance of security elements defined by magnetoresistive sensors and security coating. If initial values of the impedance are stored, actual values can be compared therewith to see if the device has not been electrically probed or modified. Such a comparison can be used to check the authenticity of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.