Back to results
US 12,444,932 B2Granted
Biometric sensor and system level electrostatic discharge (ESD) protection
AssigneeIDEX Biometrics ASA
InventorImre Knausz
Life of this patent
Estimating the term…
Abstract
A system for electrostatic discharge (ESD) protection on a smart card includes a substrate having a biometric sensor 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.
Claims15
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.
A method for electrostatic discharge (ESD) protection in a smart card, comprising:
- receiving an ESD strike on the smart card;
- routing a current associated with the ESD strike to a ground bypassing an integrated circuit (IC) located on the smart card through a plurality of paths including at least one separate electrostatic discharge (ESD) path to ground;
- and
- routing the current associated with the ESD strike to the ground through a conductive element comprising a ring-shaped electrically conductive structure connected to a resistance, wherein a path to ground comprises the resistance, a first solder ball having a resistive characteristic and a direct electrical connection through a substrate associated with the smart card.
1 more element
A device for electrostatic discharge (ESD) protection in a smart card, comprising:
- means for receiving an ESD strike on the smart card;
- and
- means for routing a current associated with the ESD strike to a ground bypassing an integrated circuit (IC) located on the smart card through a plurality of paths including at least one separate electrostatic discharge (ESD) path to ground, wherein the means for routing the current associated with the ESD strike to the separate ESD path to ground comprises a conductive element comprising a ring-shaped electrically conductive structure connected to a resistance, wherein the separate ESD path to ground comprises the resistance, a first solder ball having a resistive characteristic and a direct electrical connection through a substrate associated with the smart card.
Dependencies are inferred from the claim text.