Piezoelectric device and manufacturing method of the same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11824516
APP PUB NO 20210135650A1
SERIAL NO

17080860

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Abstract

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A piezoelectric device includes a container and an AT-cut crystal element. The AT-cut crystal element has at least one side surface intersecting with a Z′-axis of the crystallographic axis of the crystal constituted of three surfaces. The first surface is a surface equivalent to a surface formed by rotating the principal surface by 4°±3.5° with an X-axis of the crystal as a rotation axis. The second surface is a surface equivalent to a surface formed by rotating the principal surface by −57°±5° with the X-axis. The third surface is a surface equivalent to a surface formed by rotating the principal surface by −42°±5° with the X-axis. When two corner portions on a side of a second side opposed to the first side of the AT-cut crystal element are viewed in plan view, each of the two corner portions have an approximately right angle.

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Patent Owner(s)

Patent OwnerAddress
NIHON DEMPA KOGYO CO LTD47-1 SASAZUKA 1-CHOME SHIBUYA-KU TOKYO 1518569 ?1518569

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Iwata, Hirokazu Saitama, JP 59 754
Shimao, Kenji Saitama, JP 12 89
Toshikawa, Koji Saitama, JP 4 4
Watanabe, Tetsuya Saitama, JP 269 2141

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