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. 15, 2005
Filed:
Jul. 07, 2003
Takeshi Nakao, Nagaokakyo, JP;
Koji Fujimoto, Otsu, JP;
Michio Kadota, Kyoto, JP;
Toshimaro Yoneda, Ishikawa, JP;
Takeshi Nakao, Nagaokakyo, JP;
Koji Fujimoto, Otsu, JP;
Michio Kadota, Kyoto, JP;
Toshimaro Yoneda, Ishikawa, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
In a method of manufacturing a surface acoustic wave device using a Shear Horizontal type surface acoustic wave, at least one interdigital transducer (IDT) is made of a material having a larger mass-load effect than that of aluminum. The metallization ratio of the IDT and the normalization film thickness h/λ of the IDT are controlled such that ripple caused by a transversal mode wave is about 1.5 dB or less, where 'h' indicates the film thickness of the electrodes and 'h' indicates the wavelength of a surface acoustic wave.