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. 02, 2001
Filed:
May. 27, 1999
Michio Kadota, Kyoto, JP;
Junya Ago, Nagaokakyo, JP;
Hideya Horiuchi, Kyoto, JP;
Mamoru Ikeura, Nagaokakyo, JP;
Murata Manufacturing Co., LTD, Kyoto, JP;
Abstract
A surface acoustic wave device is constructed to operate using an SH type surface acoustic wave and so that the surface acoustic wave is reflected by two opposite edges of the device. The surface acoustic wave device includes a piezoelectric substrate having first and second main surfaces and the two edges arranged opposite to each other and which connect the first and second main surfaces, respectively, and an interdigital transducer having a pair of interdigital electrodes provided on the first main surface of the piezoelectric substrate and arranged so that the electrode fingers thereof are interdigitated with each other. The electrode fingers of the interdigital electrodes include a plurality of split electrodes, except for the electrode fingers located at the outermost sides in the surface acoustic wave propagation direction. The electrode fingers on the outermost sides have a width that is different from that of the split electrodes.