US 12,293,008 B2
Security device
Henri Verhoeven, Someren (NL); Edwin Schapendonk, Oss (NL); Oswald Moonen, Eindhoven (NL); and Matheus Johannus Gerardus Lammers, Nederweert (NL)
Assigned to NXP USA, Inc., Austin, TX (US)
Filed by NXP USA, Inc., Austin, TX (US)
Filed on May 13, 2022, as Appl. No. 17/663,333.
Prior Publication US 2023/0367917 A1, Nov. 16, 2023
Int. Cl. G06F 21/86 (2013.01); G06K 19/07 (2006.01); G06K 19/077 (2006.01); B42D 25/24 (2014.01)
CPC G06F 21/86 (2013.01) [G06K 19/0723 (2013.01); G06K 19/07786 (2013.01); G06K 19/07798 (2013.01); B42D 25/24 (2014.10)] 22 Claims
OG exemplary drawing
 
1. A security device, comprising:
a bulk security capacitance, including a first endpoint and a second endpoint, and having,
a first layer including a first set of two conductive elements, the first endpoint, and the second endpoint; and
a second layer including a second set of two conductive elements;
wherein the first set of conductive elements and the second set of conductive elements together form at least two bulk capacitors in series;
wherein the first and second layers are separated by a distance; and
wherein the first and second endpoints are configured to be coupled to a tamper detection circuit configured to detect a change in the bulk security capacitance.