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:
Jul. 28, 2020
Filed:
Nov. 29, 2017
Applicant:
Qorvo Us, Inc., Greensboro, NC (US);
Inventors:
Jyothi Swaroop Sadhu, Apopka, FL (US);
Maria Wang, Richardson, TX (US);
Assignee:
Qorvo US, Inc., Greensboro, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 9/60 (2006.01); H03H 9/56 (2006.01); H03H 9/17 (2006.01); H03H 9/205 (2006.01); H03H 9/13 (2006.01); H03H 9/02 (2006.01); H03H 9/58 (2006.01);
U.S. Cl.
CPC ...
H03H 9/605 (2013.01); H03H 9/02031 (2013.01); H03H 9/131 (2013.01); H03H 9/175 (2013.01); H03H 9/176 (2013.01); H03H 9/205 (2013.01); H03H 9/562 (2013.01); H03H 9/564 (2013.01); H03H 9/568 (2013.01); H03H 9/583 (2013.01); H03H 9/589 (2013.01);
Abstract
A bulk acoustic wave (BAW) resonator has a bottom electrode, a top electrode over the bottom electrode, and a multilayer piezoelectric structure between the bottom electrode and the top electrode. The multilayer piezoelectric structure has a first piezoelectric layer having a first electromechanical coupling coefficient and a second piezoelectric layer having a second electromechanical coupling coefficient that is different than the first electromechanical coupling coefficient.