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:
Jul. 06, 2010
Filed:
Jun. 26, 2008
Hirozumi Ogawa, Yasu, JP;
Takuya Sawada, Moriyama, JP;
Masahiko Kimura, Kusatsu, JP;
Kosuke Shiratsuyu, Omihachiman, JP;
Akira Ando, Omihachiman, JP;
Hirozumi Ogawa, Yasu, JP;
Takuya Sawada, Moriyama, JP;
Masahiko Kimura, Kusatsu, JP;
Kosuke Shiratsuyu, Omihachiman, JP;
Akira Ando, Omihachiman, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A piezoelectric ceramic whose resonance frequency temperature characteristic can be easily adjusted is provided. It contains first and second parts (and) which can be alternately stacked layers. The first and second parts (and) are each composed of a compound having a bismuth layer structure, such as a complex oxide containing at least Sr, Bi, and Nb, and have degrees of c-axis orientation different from each other. Since the resonance frequency temperature characteristics change according to the degree of orientation, the first and second parts (and) having different degrees of orientation are appropriately combined so that the resonance frequency temperature characteristics of the piezoelectric ceramic () as a whole is easily adjusted.