Fingerprint sensor including a substrate defining a ledge with contact points for incorporation into a smartcard

A smart card comprising:

• a card body formed of at least three layers including an intermediate layer with electrical conductors and outer layers between which the intermediate layer is sandwiched;
• a microchip connected to the electrical conductors;
• and
• a fingerprint sensor disposed within a cavity formed in the card body, the fingerprint sensor comprising:
• a contact surface;
• sensor electrodes for detecting fingerprint features of a finger placed on the contact surface;
• a substrate layer disposed beneath the sensor electrodes, wherein the substrate layer comprises a first portion, a second portion, and a ledge where an edge of the first portion extends beyond an edge of the second portion;
• conductors connected to the sensor electrodes and extending at least partially through the substrate layer;
• and
• contact points disposed on the ledge connecting the fingerprint sensor to the electrical conductors of the intermediate layer of the smart card.