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:
Mar. 02, 2004
Filed:
Jul. 22, 2000
Takashi Yamamoto, Ishikawa-ken, JP;
Yuko Yokoi, Toyama-ken, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A piezoelectric resonator includes an internal electrode sandwiched between two layers of ceramic piezoelectric substrates each having a substantially square shape. Surface electrodes are arranged on the front surface and the back surface of the piezoelectric substrate. Both of the piezoelectric substrates are polarization-treated in the substantially perpendicular direction relative to the main surfaces and in the opposite directions with respect to the sandwiched internal electrode. When a signal voltage is applied across the surface electrodes, the piezoelectric resonator is bending-deformed so as to become convex on one side of the main surfaces and become concave on the other side thereof.