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1. (WO2017018313) ELECTROACOUSTIC CONVERSION FILM, METHOD FOR PRODUCING SAME, ELECTROACOUSTIC TRANSDUCER, FLEXIBLE DISPLAY, VOCAL CORD MICROPHONE AND SENSOR FOR MUSICAL INSTRUMENTS

Pub. No.:    WO/2017/018313    International Application No.:    PCT/JP2016/071392
Publication Date: Fri Feb 03 00:59:59 CET 2017 International Filing Date: Fri Jul 22 01:59:59 CEST 2016
IPC: H04R 17/00
G10H 3/14
H01L 41/09
H01L 41/113
H01L 41/18
H01L 41/257
H04R 17/02
Applicants: FUJIFILM CORPORATION
富士フイルム株式会社
Inventors: MURAKAMI Naoki
村上 直樹
MIYOSHI Tetsu
三好 哲
Title: ELECTROACOUSTIC CONVERSION FILM, METHOD FOR PRODUCING SAME, ELECTROACOUSTIC TRANSDUCER, FLEXIBLE DISPLAY, VOCAL CORD MICROPHONE AND SENSOR FOR MUSICAL INSTRUMENTS
Abstract:
Provided are: an electroacoustic conversion film which has high conversion efficiency and is capable of reproduction with a sufficient sound volume; a method for producing this electroacoustic conversion film; an electroacoustic transducer; a flexible display; a vocal cord microphone; and a sensor for musical instruments. This electroacoustic conversion film comprises: a polymer composite piezoelectric body which is obtained by dispersing piezoelectric particles in a viscoelastic matrix that is formed of a polymer material which has viscoelasticity at room temperature; two thin film electrodes which are respectively laminated on both surfaces of the polymer composite piezoelectric body; and two protective layers which are respectively laminated on the two thin film electrodes. The intensity ratio α1 of the peak intensity of the (002) plane and the peak intensity of the (200) plane ascribed to the piezoelectric particles as the polymer composite piezoelectric body is evaluated by an X-ray diffraction method, namely the intensity ratio α1 = (peak intensity of (002) plane)/( (peak intensity of (002) plane) + (peak intensity of (200) plane)) is 0.6 or more but less than 1.