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:
Feb. 21, 2006
Filed:
Aug. 25, 2004
Applicants:
Osamu Kawachi, Yokohama, JP;
Satoshi Orito, Yokohama, JP;
Takuya Abe, Sagamihara, JP;
Inventors:
Assignee:
Fujitsu Media Devices Limited, Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/64 (2006.01);
U.S. Cl.
CPC ...
Abstract
A surface acoustic wave device includes: a substrate; a pair of reflection electrodes that are formed on the substrate; and drive electrodes that are interposed between the reflection electrodes. In this surface acoustic wave device, the pitches in each of the reflection electrodes vary according to a predetermined variation pattern. With this structure, the suppression on spurious signals and the shape factor (the sharpness of the cut-off region of the pass band) can be improved at the same time.