The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2009
Filed:
Oct. 28, 2004
Mitsuyoshi Matsushita, Chiba, JP;
Mitsuyoshi Matsushita, Chiba, JP;
JFE Mineral Company, Ltd., Tokyo, JP;
Abstract
To provide a piezoelectric single-crystal device which can stably attain an electromechanical coupling factor kof 60% or more in the lateral vibration mode and a method of manufacturing the same. Specifically, the piezoelectric single-crystal device has the polarization directionin the [110] axis of a pseudocubic system and has the direction normal to an end faceof the piezoelectric device within the solid angle range of the [001] axis ±35° including the [001] axis approximately orthogonal to the polarization direction. The electromechanical coupling factor kin the direction orthogonal to the polarization direction, in the so-called lateral vibration mode, is 60% or more.