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:
Jan. 31, 2006
Filed:
Feb. 07, 2002
Yukinori Sasaki, Hyogo, JP;
Tetsuro Shimamura, Kyoto, JP;
Tetsuo Kawasaki, Osaka, JP;
Kazunari Nishihara, Osaka, JP;
Tetsuya Furihata, Osaka, JP;
Kuniaki Matsushita, Osaka, JP;
Katsunori Moritoki, Osaka, JP;
Katsu Takeda, Osaka, JP;
Yukinori Sasaki, Hyogo, JP;
Tetsuro Shimamura, Kyoto, JP;
Tetsuo Kawasaki, Osaka, JP;
Kazunari Nishihara, Osaka, JP;
Tetsuya Furihata, Osaka, JP;
Kuniaki Matsushita, Osaka, JP;
Katsunori Moritoki, Osaka, JP;
Katsu Takeda, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A piezoelectric vibrator which uses lithium tantalate as a piezoelectric material and of which main vibration is thickness shear vibration. The thickness direction of the vibrator forms angle of 0°±5° to the X-axis of a single crystal. The longitudinal direction of vibrator lies, with the X-axis used as a rotation axis, in direction n +57°±2° clockwise from the Y-axis of the single crystal. A ratio L/H of the length L of the vibrator to the thickness H is not less than 15. A ratio Le/H of the length Le of the exciting electrode to the thickness H of the vibrator element portion is 3–6. Accordingly, a vibrator having improved temperature characteristics and a large Q is realized.