US 12,444,932 B2
Biometric sensor and system level electrostatic discharge (ESD) protection
Imre Knausz, Fairport, NY (US)
Assigned to IDEX Biometrics ASA, Oslo (NO)
Filed by IDEX BIOMETRICS ASA, Oslo (NO)
Filed on Feb. 9, 2023, as Appl. No. 18/166,528.
Prior Publication US 2024/0275164 A1, Aug. 15, 2024
Int. Cl. H02H 9/04 (2006.01); G06K 19/077 (2006.01)
CPC H02H 9/045 (2013.01) [G06K 19/07771 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A system for electrostatic discharge (ESD) protection on a smart card, comprising:
a substrate having a biometric sensor and an integrated circuit (IC) mounted thereon; and
a conductive element mounted to the substrate, wherein a current induced by an ESD strike is conducted to a ground through the conductive element and the substrate through a separate electrostatic discharge (ESD) path bypassing the IC and a sensing area of the biometric sensor, wherein the conductive element is a ring-shaped electrically conductive structure connected to a resistance and the separate ESD path to ground comprises the resistance, a first solder ball having a resistive characteristic and a direct electrical connection bypassing the IC and the sensing area of the biometric sensor through the substrate.