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:
Oct. 26, 2021
Filed:
Dec. 09, 2019
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 9/145 (2006.01); H03F 3/21 (2006.01); H04B 1/04 (2006.01); H03H 9/25 (2006.01);
U.S. Cl.
CPC ...
H03H 9/02937 (2013.01); H03F 3/211 (2013.01); H03H 9/02637 (2013.01); H03H 9/02834 (2013.01); H03H 9/02866 (2013.01); H03H 9/02992 (2013.01); H03H 9/14541 (2013.01); H03H 9/25 (2013.01); H04B 1/04 (2013.01); H03F 2200/165 (2013.01); H03F 2200/294 (2013.01); H03F 2200/451 (2013.01); H04B 2001/0408 (2013.01);
Abstract
An acoustic wave device includes a high-acoustic-velocity film, a piezoelectric layer provided directly or indirectly on the high-acoustic-velocity film, an IDT electrode provided on the piezoelectric layer, and a dielectric film provided on the piezoelectric layer to cover the IDT electrode. An acoustic velocity of bulk waves propagating through the high-acoustic-velocity film is higher than an acoustic velocity of acoustic waves propagating through the piezoelectric layer. The dielectric film includes a material including hydrogen atoms.