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:
Sep. 20, 2005
Filed:
Feb. 10, 2003
Kazuo Ikeda, Osaka, JP;
Masahiro Takada, Osaka, JP;
Kazunori Nishimura, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A surface acoustic wave device comprises: a plurality of surface acoustic wave elements provided on a piezoelectric substrate to be electrically isolated with each other, a substrate provided with a first conductor electrically connecting the plurality of surface acoustic wave elements, a second conductor electrically isolated to the first conductor and an external terminal, and a sealing member for protecting the substrate and the piezoelectric substrate. For the substrate, a package having a recess or an insulating substrate is used. The first conductor is electrically isolated to the external terminal, while the second conductor is electrically connected with the external terminal. The above-described structure provides a small-sized surface acoustic wave device with excellent-attenuation characteristics.