Piezoelectric single crystal device and fabrication method thereof
AssigneeJfe Mineral Company, Ltd.
InventorsMitsuyoshi Matsushita, Yousuke Iwasaki
Life of this patent
Estimating the term…
Abstract
A piezoelectric single crystal device for actively employing the electromechanical coupling factor k31 in the direction orthogonal to the polarization direction is provided. Specifically, with the polarization direction as [001] axis of a pseudocubic system, an angle between the normal direction 1 of the piezoelectric device edge face and the direction n orthogonal to the domain structure within the crystal face including [010] and [100] axes orthogonal to the polarization direction is in the range 0 to 15° or 40 to 50°.
Claims11
A piezoelectric single crystal device which, with the polarization direction as a [001] axis of a pseudocubic system, that has an electromechanical coupling factor k31 in the vibration mode of the lateral direction wherein:
- a normal direction of the piezoelectric device edge face is orthogonal to the polarization direction;
- and
- an angle between the normal direction of the piezoelectric device edge face and a direction orthogonal to a domain structure within a crystal face including [010] and [100] axes orthogonal to the polarization direction, is within a range of one of at least 0 to 15 degrees and 40 to 50 degrees.
Dependencies are inferred from the claim text.