Fingerprint sensor and touch device including the same

摘要

A fingerprint sensor includes a piezoelectric substrate (100 ; 200 ; 500), and an electrode on the piezoelectric substrate (100 ; 200 ; 500). The electrode includes a first electrode (310) and a second electrode (320) on at least one of one surface of the piezoelectric substrate (100 ; 200 ; 500) and an opposite surface opposite to the one surface. The electrode includes a node area (N) in which the first electrode (310) crosses the second electrode (320), and the node area (N) transmits and receives a signal by an object that makes contact with the node area (N) or approaches the node area (N) in a direction of the piezoelectric substrate (100 ; 200 ; 500). The fingerprint sensor includes a substrate (100 ; 200 ; 500) including a first area (310) to a fourth area (1A to 4A). At least one of first and second electrodes (310 ; 320) is provided in the first area to the third area (1A to 3A), and a chip (600) connected with the first and second electrodes (310 ; 320) is provided in the fourth area (4A).