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. 12, 2020
Filed:
Dec. 24, 2015
Applicant:
Citizen Watch Co., Ltd., Tokyo, JP;
Inventors:
Youichi Nonogaki, Hachiouji, JP;
Yoshitaka Kinoshita, Tokyo, JP;
Takashi Akahane, Tokorozawa, JP;
Satoshi Sohda, Kawagoe, JP;
Assignee:
CITIZEN WATCH CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01K 11/26 (2006.01); H03H 9/02 (2006.01); G01K 7/32 (2006.01); H03H 9/25 (2006.01); H01L 41/107 (2006.01); H01L 41/18 (2006.01); H03H 9/64 (2006.01); H01L 41/41 (2013.01);
U.S. Cl.
CPC ...
G01K 11/265 (2013.01); G01K 7/32 (2013.01); H01L 41/107 (2013.01); H01L 41/18 (2013.01); H03H 9/02543 (2013.01); H03H 9/25 (2013.01); H03H 9/642 (2013.01); H01L 41/41 (2013.01);
Abstract
Provided is a surface acoustic wave device using a novel and steadily suppliable piezoelectric material that is resistant to a high-temperature environment and enables the surface acoustic wave device to use a 2 GHz to 2.5 GHz band or higher. The surface acoustic wave device includes: a piezoelectric substrate formed from a monocrystal of gehlenite (CAS: Ca2Al(AlSi)O7); and interdigital transducers formed on a surface acoustic wave propagation plane of the piezoelectric substrate.