Sensing element and fingerprint sensor comprising the sensing elements

Abstract

A fingerprint sensor comprises a substrate, a first sensing electrode over the substrate, a second sensing electrode spaced apart from the first sensing electrode over the substrate, a first conductive plate and a second conductive plate. The first sensing electrode is configured to detect a capacitance in response to a touch event on the fingerprint sensor, and to receive an input signal from a signal source. The second sensing electrode is configured to detect a capacitance in response to the touch event. The first conductive plate is configured to shield at least a portion of each of the first sensing electrode and the second sensing electrode from the substrate. The second conductive plate is disposed between the substrate and the second sensing electrode. The sensitivity of the fingerprint sensor is inversely proportional to the capacitance between the second sensing electrode and the second conductive plate.

Dependencies are inferred from the claim text.