US 12,001,593 B2
Physical unclonable function device and method
Francesco La Rosa, Rousset (FR)
Assigned to STMICROELECTRONICS (ROUSSET) SAS, Rousset (FR)
Filed by STMicroelectronics (Rousset) SAS, Rousset (FR)
Filed on Mar. 12, 2021, as Appl. No. 17/199,438.
Claims priority of application No. 2002929 (FR), filed on Mar. 25, 2020.
Prior Publication US 2021/0303735 A1, Sep. 30, 2021
Int. Cl. G06F 21/75 (2013.01); G06F 21/72 (2013.01); G11C 11/4096 (2006.01); H01L 27/088 (2006.01); H03K 19/17768 (2020.01)
CPC G06F 21/75 (2013.01) [G06F 21/72 (2013.01); G11C 11/4096 (2013.01); H01L 27/0883 (2013.01); H03K 19/17768 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A system comprising:
a physical unclonable function device, the device comprising:
a first assembly of non-volatile memory cells each having a selection transistor embedded in a semiconductor substrate and a depletion-type state transistor having a control gate and a floating gate that are electrically connected, the depletion-type state transistors having respective effective threshold voltages belonging to a common random distribution; and
a processing circuit configured to deliver, to an output interface of the device, a group of output data based on differential readings of pairs of effective threshold voltages of the depletion-type state transistors of pairs of the memory cells of the first assembly.