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. 11, 2003
Filed:
May. 19, 2000
Katsuhiro Ikada, Ishikawa-ken, JP;
Kenji Sakaguchi, Ishikawa-ken, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A method of making surface acoustic wave device includes a piezoelectric substrate, a first surface acoustic wave element having at least one interdigital transducer on the piezoelectric substrate, a second surface acoustic wave element having at least one interdigital transducer which is provided on the piezoelectric substrate. The at least one interdigital transducer of the second surface acoustic wave element has a thickness that is different from the interdigital transducer of the first surface acoustic wave element, and the second surface acoustic wave element has a frequency characteristic that is different from that of the first surface acoustic wave element. An insulating film is applied to the first and second surface acoustic wave elements. A thickness of the insulating film at a region on the first surface acoustic wave element is different from the thickness of a region on the second surface acoustic wave.