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:
May. 08, 2007
Filed:
Mar. 03, 2004
Applicants:
Osamu Nakagawara, Rittou, JP;
Akinori Shinoda, Shiga-ken, JP;
Inventors:
Osamu Nakagawara, Rittou, JP;
Akinori Shinoda, Shiga-ken, JP;
Assignee:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 31/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A piezoelectric substrate is provided with interdigital transducer electrodes including a first electrode layer, a second electrode layer, and a third electrode layer that is principally made of aluminum. The piezoelectric substrate has a stepped structure on the surface of the piezoelectric substrate, the stepped structure including terraces each having a width of about 50 nm or less and steps each having a width of a mono-molecular layer (e.g., about 14 Å).