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:
Nov. 27, 2007
Filed:
Jun. 28, 2005
Yuuko Yokota, Kyoto, JP;
Masayuki Funami, Kyoto, JP;
Takanori Ikuta, Kyoto, JP;
Wataru Koga, Kyoto, JP;
Yoshifumi Yamagata, Kyoto, JP;
Motoki Ito, Kyoto, JP;
Kiyohiro Iioka, Kyoto, JP;
Yuuko Yokota, Kyoto, JP;
Masayuki Funami, Kyoto, JP;
Takanori Ikuta, Kyoto, JP;
Wataru Koga, Kyoto, JP;
Yoshifumi Yamagata, Kyoto, JP;
Motoki Ito, Kyoto, JP;
Kiyohiro Iioka, Kyoto, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
A conductor layeris provided so as to prevent pyroelectric destruction occurring in the steps of manufacturing a surface acoustic wave elementon the other surface opposite to an IDT electrode formation surface of a piezoelectric substrate. At this time, the conductor layeris formed, except for a regionopposed to an input electrode sectionin a filter regionand/or a regionopposed to an output electrode section. This allows a coupling amount between the input electrode sectionand the output electrode sectiondue to a parasitic capacitance formed between the input electrode sectionand the output electrode sectionin the filter regionto be reduced, thereby allowing the out-of-band attenuation characteristics of a surface acoustic wave device to be improved.