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. 09, 2010
Filed:
Sep. 01, 2006
Kazuyuki Sakiyama, Chigasaki, JP;
Kengo Asai, Hachiouji, JP;
Atsushi Isobe, Kodaira, JP;
Kunio Matsumoto, Koshigaya, JP;
Shinichi Fujiwara, Kamakura, JP;
Kazuyuki Sakiyama, Chigasaki, JP;
Kengo Asai, Hachiouji, JP;
Atsushi Isobe, Kodaira, JP;
Kunio Matsumoto, Koshigaya, JP;
Shinichi Fujiwara, Kamakura, JP;
Hitachi Media Electronics Co., Ltd., Iwate, JP;
Abstract
A surface acoustic wave device in the present invention is provided with a piezoelectric substrate, a supporting substrate being jointed to the piezoelectric substrate and including a material different in expansion coefficient from the piezoelectric substrate and an interdigital electrode for exciting a surface acoustic wave, the electrode being arranged on the surface of the piezoelectric substrate. Either the interdigital electrode or the piezoelectric substrate is configured so that the interdigital electrode is 40% or more to 70% or less as long as the piezoelectric substrate in the direction to which a surface acoustic wave propagates.