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US 12,620,968 B2Granted
Quartz crystal resonator, quartz crystal resonator unit and quartz crystal oscillator
AssigneeMurata Manufacturing Co., Ltd.
InventorToshio Nishimura
Life of this patent
Estimating the term…
Abstract
A quartz crystal resonator that includes a quartz crystal element having main surfaces extending in a plane φ degrees around a Z axis of the quartz crystal element and θ degrees around an X′ axis of the quartz crystal element; and an electrode in contact with the quartz crystal element, where x=t/T≥0.01, |φ−(−98.6x3+114.0x2−22.3x+1.3)|≤5 and |θ−(−9.5x3−10.9x2+1.4x+35.3)|≤0.5, wherein T is a thickness of the quartz crystal element and t is a thickness of the electrode.
Claims20
A quartz crystal resonator, comprising:
- a quartz crystal element having main surfaces extending in a plane φ degrees around a Z axis of the quartz crystal element and θ degrees around an X′ axis of the quartz crystal element;
- and
- an electrode in contact with the quartz crystal element, where
- x=t/T≥0.01,
- 0<φ,
- |φ−(−98.6x3+114.0x2−22.3x+1.3)|≤5, and
- |θ−(−9.5x3-10.9x2+1.4x+35.3)|≤0.5,
- wherein T is a thickness of the quartz crystal element and t is a thickness of the electrode.
5 more elements
A quartz crystal resonator, comprising:
- a quartz crystal element having main surfaces extending in a plane φ degrees around a Z axis of the quartz crystal element and θ degrees around an X′ axis of the quartz crystal element;
- and
- an electrode in contact with the quartz crystal element, where
- x=t/T≥0.01,
- 0<φ, and
- |φ−(−0.017θ3+1.37θ2-37.6θ+351)|≤5,
- wherein T is a thickness of the quartz crystal element and t is a thickness of the electrode.
4 more elements
Dependencies are inferred from the claim text.