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Title:
ELECTROACOUSTIC CONVERSION FILM, METHOD FOR PRODUCING ELECTROACOUSTIC CONVERSION FILM AND ELECTROACOUSTIC TRANSDUCER
Document Type and Number:
WIPO Patent Application WO/2017/030045
Kind Code:
A1
Abstract:
Provided are: an electroacoustic conversion film which is capable of reproduction with a sufficient sound volume and has high heat dissipation properties, while being suppressed in sound pressure change over time; a method for producing an electroacoustic conversion film; and an electroacoustic transducer. This electroacoustic conversion film is obtained by laminating: 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. This electroacoustic conversion film has a projected part that is molded to have a convex shape protruding on one main surface side, and the ratio of the molded height H of the projected part to the breadth Ds of the projected part when viewed from a direction perpendicular to the main surface, namely H/Ds satisfies 0 < H/Ds ≤ 0.15.

Inventors:
OZAWA Shin (577 Ushijima, Kaisei-machi, Ashigara-kami-gu, Kanagawa 77, 〒2588577, JP)
ARAKAWA Takami (577 Ushijima, Kaisei-machi, Ashigara-kami-gu, Kanagawa 77, 〒2588577, JP)
INOUE Daisuke (577 Ushijima, Kaisei-machi, Ashigara-kami-gu, Kanagawa 77, 〒2588577, JP)
Application Number:
JP2016/073413
Publication Date:
February 23, 2017
Filing Date:
August 09, 2016
Export Citation:
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Assignee:
FUJIFILM CORPORATION (26-30, Nishiazabu 2-chome Minato-k, Tokyo 20, 〒1068620, JP)
International Classes:
H04R17/00; H01L41/09; H01L41/18; H01L41/333; H01L41/37; H04R7/12; H04R31/00
Domestic Patent References:
WO2007097077A12007-08-30
Foreign References:
JP2014017799A2014-01-30
JP2011097181A2011-05-12
JP2004007400A2004-01-08
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (Yusen Iwamoto-cho Bldg. 6F, 3-3 Iwamoto-cho 2-chome, Chiyoda-k, Tokyo 32, 〒1010032, JP)
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