Quartz resonating piece, quartz resonator, and quartz device

Details Quartz resonating piece, quartz resonator, and quartz device Quartz resonating piece, quartz resonator, and quartz device

2005-02-01

2005-02-01

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

06849991

ABSTRACT:
The invention provides a stabilized frequency characteristic over a wide temperature range. A quartz resonating piece is provided such that an electrical axis of quartz corresponds to an X axis, a mechanical axis of the quartz corresponds to a Y axis, and an optical axis of the quartz corresponds to a Z axis. The quartz resonating piece includes a quartz plate having a side that is parallel to an X′axis set by clockwise rotation of the X axis around the Z axis by an angle equal to or greater than −5.0° and less than −1.0° or by an angle greater than +1.0° and equal to or less than 15.9°, and another side that is parallel to a Z′ axis set by clockwise rotation of the Z axis around the X′ axis by an angle in a range from 34.6° to 35.1° inclusive; or a quartz plate having a side that is parallel to the X′ axis set by clockwise rotation of the X axis around the Z axis by an angle in a range from −15.9° to −5.0° inclusive, and another side that is parallel to the Z′ axis set by clockwise rotation of the Z axis around the X′ axis by an angle in a range from 34.2° to 35.3° inclusive.

REFERENCES:
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patent: 4178566 (1979-12-01), Kawashima
patent: 4419600 (1983-12-01), Sinha
patent: B2-3218537 (2001-08-01), None
patent: A-2003-324332 (2003-11-01), None
P.C.Y. Lee & Y.K. Yong, “Frequency-Temperature Behavior of Thickness Vibrations of Doubly Rotated Quartz Plates Affected by Plate Dimensions and Orientations”,Journal of Applied Physics, vol. 60, No. 7, Oct. 1, 1986, p. 2340.

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