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:
Apr. 09, 2002
Filed:
Mar. 28, 2000
Applicant:
Inventors:
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 9/64 ;
U.S. Cl.
CPC ...
H03H 9/64 ;
Abstract
A surface acoustic wave filter includes a glass substrate, an interdigital transducer provided on the glass substrate, a piezoelectric film arranged on the glass substrate so as to cover the interdigital transducer; a terminal electrode provided on the glass substrate and electrically connected to the interdigital transducer; and a coating film having an area smaller than that of the terminal electrode. The coating film is arranged on the terminal electrode such that a portion of a top surface of the terminal electrode is exposed throughout the periphery thereof.