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:
May. 22, 2007
Filed:
Nov. 17, 2004
Satoshi Orito, Yokohama, JP;
Toru Takezaki, Yokohama, JP;
Satoshi Ichikawa, Otawara, JP;
Hirotada Wachi, Yokohama, JP;
Tsuyoshi Oura, Kawasaki, JP;
Toshifumi Tanaka, Otawara, JP;
Koichi Wada, Yokohama, JP;
Satoshi Orito, Yokohama, JP;
Toru Takezaki, Yokohama, JP;
Satoshi Ichikawa, Otawara, JP;
Hirotada Wachi, Yokohama, JP;
Tsuyoshi Oura, Kawasaki, JP;
Toshifumi Tanaka, Otawara, JP;
Koichi Wada, Yokohama, JP;
Fujitsu Media Devices Limited, Yokohama, JP;
Abstract
A surface acoustic wave device includes a piezoelectric substrate, a first and a second interdigital transducers (IDTs) provided on the piezoelectric substrate. The first IDT includes multiple tracks having different frequency characteristics that are connected in parallel. The second IDT includes a normalized electrode pattern. The frequency characteristic of the multiple tracks is asymmetric to a center frequency of the SAW filter, substantially flat in a passband when those of the multiple tracks are overlapped, or complementary in the passband. Thus, it is possible to provide the surface acoustic wave device having a high damping property.