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. 17, 2012
Filed:
Mar. 25, 2008
Ikuo Obara, Kyoto, JP;
Daisuke Makibuchi, Kyoto, JP;
Kunihiko Muraoka, Kyoto, JP;
Kiyohiro Iioka, Kyoto, JP;
Ikuo Obara, Kyoto, JP;
Daisuke Makibuchi, Kyoto, JP;
Kunihiko Muraoka, Kyoto, JP;
Kiyohiro Iioka, Kyoto, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
A surface acoustic wave device configured by forming an oxide layeron a piezoelectric substratecomposed of a lithium tantalate single crystal or a lithium niobate single crystal and having weak pyroelectric properties having a lower oxygen content than a stoichiometric composition ratio, and forming thereon an IDT electrode. There is no static destruction of a minute electrode due to the pyroelectric effect of the piezoelectric substrate having weak pyroelectric properties, and frequency characteristics are not degraded.