Method of manufacturing piezoelectric element, method of manufacturing oscillatory wave motor, method of manufacturing optical apparatus, and method of manufacturing electronic apparatus

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United States of America Patent

PATENT NO 11450801
APP PUB NO 20200119257A1
SERIAL NO

16489270

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Abstract

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Provided is a method of manufacturing a piezoelectric element in which, at a time when the piezoelectric element is manufactured, a piezoelectric material is prevented from being exposed to a temperature higher than a Curie temperature thereof to be depolarized, to thereby significantly decrease piezoelectric properties. The method of manufacturing a piezoelectric element includes a first step of arranging a plurality of electrodes on a piezoelectric material, electrically short-circuiting two or more electrodes of the plurality of electrodes, and subjecting the piezoelectric material to heat treatment, and a second step of, after the first step, electrically opening the short circuit of the two or more electrodes at a time when a temperature of the piezoelectric material decreases to less than a temperature of the piezoelectric material at a time of the heat treatment.

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Patent Owner(s)

Patent OwnerAddress
CANON KABUSHIKI KAISHAOHTA-KU TOKYO 146-8501

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujita, Satoshi Utsunomiya, JP 92 844
Furuta, Tatsuo Machida, JP 101 448
Hayashi, Jumpei Yokohama, JP 65 394
Iitsuka, Yuki Yaita, JP 1 0
Oshima, Kanako Tokyo, JP 42 123
Uebayashi, Akira Tokyo, JP 31 67
Watanabe, Takayuki Yokohama, JP 316 3383

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