Patent Number: 6,297,713

Title: Surface acoustic wave device with split electrodes and outermost electrodesof a different width than the split electrodes

Abstract: A surface acoustic wave device is constructed to operate using an SH typesurface acoustic wave and so that the surface acoustic wave is reflectedby two opposite edges of the device. The surface acoustic wave deviceincludes a piezoelectric substrate having first and second main surfacesand the two edges arranged opposite to each other and which connect thefirst and second main surfaces, respectively, and an interdigitaltransducer having a pair of interdigital electrodes provided on the firstmain surface of the piezoelectric substrate and arranged so that theelectrode fingers thereof are interdigitated with each other. Theelectrode fingers of the interdigital electrodes include a plurality ofsplit electrodes, except for the electrode fingers located at theoutermost sides in the surface acoustic wave propagation direction. Theelectrode fingers on the outermost sides have a width that is differentfrom that of the split electrodes.

Inventors: Kadota; Michio (Kyoto, JP), Ago; Junya (Nagaokakyo, JP), Horiuchi; Hideya (Kyoto, JP), Ikeura; Mamoru (Nagaokakyo, JP)


International Classification:

Expiration Date: 10/02/2013