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:
Oct. 19, 2010
Filed:
Apr. 08, 2004
Koji Fujimoto, Otsu, JP;
Michio Kadota, Kyoto, JP;
Yoshiharu Yoshii, Kanazawa, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A surface acoustic wave sensor for detecting a target substance by measuring the change in frequency due to the mass applied to a reaction membrane placed on a surface acoustic wave element having high sensitivity due to the improvement of the surface acoustic wave element structure. The surface acoustic wave sensor includes an SH-type surface acoustic wave and a rotated Y-cut LiTaOsubstrate having Euler angles (0°, 120° to 140°, 0°±5°); electrodes principally containing Au, for exciting a surface acoustic wave, the electrodes being arranged on the LiTaOsubstrate; and a reaction membrane bound to a target substance or a binding substance bound to the target substance covering the electrodes arranged on the LiTaOsubstrate. The interdigital transducers have a normalized thickness of about 3.0% to about 5.0%, the normalized thickness being determined by normalizing the thickness of the interdigital transducers by the wavelength of the surface acoustic wave.