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:
Jun. 28, 2005
Filed:
Jul. 26, 2002
Kenji Sakaguchi, Komatsu, JP;
Masanobu Watanabe, Kanazawa, JP;
Mitsushi Takatori, Ishikawa-ken, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A surface acoustic wave device includes a surface acoustic wave element, a packaging case, and a packaging electrode. The surface acoustic wave element has a piezoelectric substrate, an interdigital transducer, an electrode pad, an intermediate electrode, an upper electrode, and a bump electrode. The intermediate electrode is preferably made of NiCr including about 15 to about 30 weight percent of Cr. The electrode pad and upper electrode are made of Al. The bump electrode is press-bonded to the packaging electrode with an ultrasonic wave or heat applied to the bump electrode. The resulting surface acoustic wave device has excellent characteristics and the surface acoustic wave element is not removed or peeled from the packaging case during a drop test.