Quartz-crystal vibrating piece and quartz crystal device using the same

An AT-cut quartz-crystal vibrating piece includes a vibrator, a peripheral portion, and a level difference. The peripheral portion has a thickness thinner than a thickness of the vibrator. The level difference is on each of a front and a back of the quartz-crystal vibrating piece. The level differen...

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Bibliographic Details
Main Authors YAMAGUCHI, TAKASHI, TOSHIKAWA, KOJI
Format Patent
LanguageChinese
English
Published 01.05.2024
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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Summary:An AT-cut quartz-crystal vibrating piece includes a vibrator, a peripheral portion, and a level difference. The peripheral portion has a thickness thinner than a thickness of the vibrator. The level difference is on each of a front and a back of the quartz-crystal vibrating piece. The level difference is generated caused by a thickness difference between the vibrator and the peripheral portion. When a dimension along an X-axis of a crystal of the quartz-crystal vibrating piece is defined as Lx, a dimension along a Z'-axis of the crystal of the quartz-crystal vibrating piece is defined as Lz, a thickness of the vibrator is defined as t, and a height of the level difference is defined as d, Lx is in a range from 849 to 857 [mu]m, Lz is in a range from 625 to 645 [mu]m, and d/t is in a range of 0.094 ≤ d/t ≤ 0.11.
Bibliography:Application Number: TW202312140938