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:
Aug. 10, 2004
Filed:
Jul. 19, 2001
Other;
Abstract
In a surface acoustic wave resonator in which an interdigital transducer is formed on a piezoelectric substrate with apodization based on cross lengths of electrode fingers and the inside face of each bus bar is not parallel to a group velocity direction of a surface acoustic wave excited on the interdigital transducer, reflector electrode fingers and excitation-area electrode fingers are disposed to provide relatively shifted positioning therebetween in the group velocity direction of the surface acoustic wave or a distance between the periphery of an excitation area and the inside face of each bus bar is limited within a predetermined range.
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