POLYVINYLIDENE FLUORIDE PIEZOELECTRIC MATERIAL, PREPARATION METHOD THEREFOR, AND FINGERPRINT RECOGNITION MODULE

WIPO Patent Application WO/2020/107790

A1

Disclosed is a polyvinylidene fluoride piezoelectric material, comprising the following components in parts by weight: 3-18% of polyvinylidene fluoride, 31-54% of a first solvent, 26-63% of a second solvent, 2-4% of a fluorine-containing surfactant, and 0.01-0.1% of an inducing material, wherein the inducing material is one of carbon nanotubes, carbon black, and gold nanorods. A method for preparing the polyvinylidene fluoride piezoelectric material using same comprises: providing a thin film transistor substrate, providing the polyvinylidene fluoride piezoelectric material, coating same on one surface of the thin film transistor substrate, and carrying out polarization treatment. A fingerprint recognition module containing the polyvinylidene fluoride piezoelectric material comprises: a thin film transistor substrate and a piezoelectric thin film layer coated thereon, wherein the piezoelectric thin film layer contains the polyvinylidene fluoride piezoelectric material.

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ZHOU YONGXIANG (CN)

PCT/CN2019/084240

June 04, 2020

April 25, 2019

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WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD (CN)

C08L27/16; C09D127/16; C09D7/61; G06K9/00

WO2018085936A1	2018-05-17
WO2018085936A1	2018-05-17

CN109651900A	2019-04-19
CN107462350A	2017-12-12
CN105449095A	2016-03-30
CN104829976A	2015-08-12

ESSEN PATENT&TRADEMARK AGENCY (CN)

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