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:
Dec. 08, 2020
Filed:
Dec. 07, 2017
Applicant:
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Inventors:
Assignee:
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/02 (2006.01); H03H 9/25 (2006.01); H03H 9/05 (2006.01); H03H 9/145 (2006.01); H01L 41/047 (2006.01); H03H 9/64 (2006.01);
U.S. Cl.
CPC ...
H03H 9/25 (2013.01); H03H 9/02559 (2013.01); H03H 9/02574 (2013.01); H03H 9/0595 (2013.01); H03H 9/14544 (2013.01); H01L 41/0477 (2013.01); H03H 9/6483 (2013.01);
Abstract
An elastic wave device includes a piezoelectric thin film provided on a low acoustic velocity film and an IDT electrode provided on the piezoelectric thin film, wherein the piezoelectric thin film is made of a piezoelectric single crystal and includes a first principal surface that is a positive surface in a polarization axis direction and a second principal surface that is a negative surface in the polarization axis direction. The first principal surface of the piezoelectric thin film faces the low acoustic velocity film, and the second principal surface faces the IDT electrode.