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US 12,706,588 B2Granted
Crystal element and crystal device
AssigneeKYOCERA Corporation
InventorDaisuke Matsuura
Life of this patent
Estimating the term…
Abstract
Provided are a crystal element and a crystal device that have an improved DLD characteristic. The crystal element includes a crystal piece and a pair of electrodes. Each of the electrodes is positioned on a corresponding one of both surfaces of the crystal piece and includes a conductive layer having a gold content of 90% or more in mass ratio. The crystal element has the DLD characteristic in which a portion in a positive direction (+) and a portion in an opposite direction (−) are mixed.
Claims16
A crystal element comprising:
- a crystal piece;
- and
- a pair of electrodes, each of the electrodes being positioned on a corresponding one of both surfaces of the crystal piece and comprising a conductive layer having a gold content of 90% or more in mass ratio, wherein
- the crystal element has a drive level dependency (DLD) characteristic in which a portion in a positive direction (+) and a portion in an opposite direction (−) are mixed;
- and wherein a crystal impedance of the crystal element is less than 30 Ω.
2 more elements
A crystal element comprising:
- a crystal piece;
- and
- a pair of electrodes, each of the electrodes being positioned on a corresponding one of both surfaces of the crystal piece and comprising a conductive layer having a gold content of 90% or more in mass ratio, wherein
- the crystal element has a drive level dependency (DLD) characteristic in which a portion in a positive direction (+) and a portion in an opposite direction (−) are mixed and wherein a product value of a thickness (mm) of the conductive layer and a resonance frequency (MHz) of the crystal element is 0.017272 or more and 0.019684 or less.
1 more element
A crystal element comprising:
- a crystal piece;
- and
- an electrode comprising:
- a base layer positioned on both surfaces of the crystal piece at an identical position in plan view on the respective surfaces;
- and
- a conductive layer positioned on the base layer and having a gold content of 90% or more in mass ratio, wherein
- a product value of a thickness (mm) of the conductive layer and a resonance frequency (MHz) of the crystal element is 0.017272 or more and 0.019684 or less.
4 more elements
Dependencies are inferred from the claim text.