Semiconductor device, carrier, card reader, methods of...

Details Semiconductor device, carrier, card reader, methods of... Semiconductor device, carrier, card reader, methods of...

2007-10-30

2007-10-30

Ho, Tu-Tu V. (Department: 2818)

Active solid-state devices (e.g., transistors, solid-state diode

Housing or package

Smart card package

C257S421000, C257S922000, C257SE23064, C257SE23117

Reexamination Certificate

active

11299173

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.

REFERENCES:
patent: 2001/0033012 (2001-10-01), Kommerling et al.
patent: 2005/0021993 (2005-01-01), De Jongh et al.

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