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:
Jan. 07, 2014
Filed:
Dec. 23, 2010
Applicants:
Shuichi Kawano, Suwa, JP;
Masashi Fujioka, Minowa, JP;
Inventors:
Shuichi Kawano, Suwa, JP;
Masashi Fujioka, Minowa, JP;
Assignee:
Seiko Epson Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/64 (2006.01); H03H 9/25 (2006.01); H03B 5/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
A surface acoustic wave device includes: a sapphire substrate having a C-plane main surface; an aluminum nitride film which is formed on the main surface of the sapphire substrate; comb-like electrodes which are formed on the surface of the aluminum nitride film to excite surface acoustic waves; and a silicon dioxide film which covers the comb-like electrodes and the surface of the aluminum nitride film.