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. 06, 2004
Filed:
Jul. 16, 2001
Kenji Yoshida, Tokyo, JP;
Shusou Wadaka, Tokyo, JP;
Koichiro Misu, Tokyo, JP;
Tsutomu Nagatsuka, Tokyo, JP;
Kouji Murai, Tokyo, JP;
Masatsune Yamaguchi, Chiba, JP;
Kenya Hashimoto, Chiba, JP;
Tatsuya Ohmori, Chiba, JP;
Koji Ibata, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
There is disclosed an acoustic wave apparatus, constructed in such a manner that a surface rotated in the range of 34° to 41° from a crystal Y axis around the crystal X axis of lithium tantalate is set as the surface of a substrate, a standardized electrode thickness (h/&lgr;) obtained by standardizing a thickness h of an electrode finger constituting at least a part of an interdigital transducer by a wavelength &lgr; of a surface acoustic wave is set to the range of 0.01 to 0.05, and a duty ratio (w/p) of the electrode finger decided based on a width w and an arraying cycle p of the electrode finger is set to the value ranging from 0.6 to just below 1.0.