The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 12, 2012
Filed:
Feb. 13, 2008
Frank Zachariasse, Wuchen, NL;
Frank Zachariasse, Wuchen, NL;
NXP B.V., Eindhoven, NL;
Abstract
A tamper-resistant semiconductor device () which includes a plurality of electronic circuits formed on a circuitry side () of a substrate () having an opposite side which is a backside () of the semiconductor device, and comprises at least one light-emitting device (-) and at least one light-sensing device (--) provided on the circuitry side () of the semiconductor device. The light-emitting device (-) is arranged to emit light, including a wavelength range for which the substrate () is transparent, into the substrate towards the backside (), and the light-sensing device (--) is arranged to sense at least a fraction of the emitted light following passage through the substrate () and reflection at the backside (), and configured to output a signal indicative of a reflecting state of the backside, thereby enabling detection of an attempt to tamper with the backside () of the semiconductor device (). Through the present invention, a semiconductor device can be equipped with a backside tamper protection which neither restricts the field of application of the semiconductor device, nor the choice of packaging of the device.