HIGH-RESOLUTION ELECTRIC FIELD SENSOR IN COVER GLASS

摘要

A fingerprint sensor is described that includes a thin protective cover layer on a sensor glass layer with receive circuitry between the thin protective cover layer and the sensor glass layer. In an implementation, a fingerprint sensor assembly includes a controller; a metal layer configured to be electrically coupled to the controller; a transmit layer electrically connected to the metal layer and the controller; a sensor glass layer, where the transmit layer is disposed on a first side of the sensor glass layer, and where the transmit layer is electrically coupled to the controller; a receive layer disposed on a second side of the sensor glass layer, where the receive layer is electrically coupled to the controller; and a protective cover layer disposed on the receive layer.

主权项

1. A sensor assembly, comprising:
a controller; a metal layer configured to be electrically coupled to the controller; a sensor glass layer; a transmit layer electrically connected to the metal layer and the controller, the transmit layer being disposed on a first side of the sensor glass layer, the transmit layer being configured to transmit an electric field; a receive layer disposed on a second side of the sensor glass layer, the receive layer being electrically coupled to the metal layer, the receive layer being configured to detect changes in the electric field; and a protective cover layer disposed proximate the receive layer.