PICKUP SENSOR AND BIOLOGICAL SENSOR
» Número: US2019141433A1 (A1)
» Fecha Publicación: 09/05/2019
» Solicitante: FUJIFILM CORP?[JP]
» Inventor: MIYOSHI TETSU?[JP]; SATO JUN?[JP]
Provided are a pickup sensor and a biological sensor that are small-sized and can detect micro vibration efficiently and stably with high accuracy. The pickup sensor includes an electroacoustic converter film including: a piezoelectric polymer composite in which piezoelectric particles are dispersed in a viscoelastic matrix that is formed of a polymer material having viscoelasticity at normal temperature; two thin film electrodes that are laminated on opposite surfaces of the piezoelectric polymer composite, respectively; and a protective layer that is laminated on at least one of the two thin film electrodes, in which at least a part of a surface of the electroacoustic converter film is an abutting surface that abuts against a test object, and the thin film electrode on a surface opposite to the abutting surface is grounded.