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. 07, 2013
Filed:
Feb. 24, 2012
Richard C. Ruby, Menlo Park, CA (US);
Wei Pang, Fort Collins, CO (US);
Qiang Zou, Fort Collins, CO (US);
Donald Lee, Fort Collins, CO (US);
Richard C. Ruby, Menlo Park, CA (US);
Wei Pang, Fort Collins, CO (US);
Qiang Zou, Fort Collins, CO (US);
Donald Lee, Fort Collins, CO (US);
Avago Technologies General IP (Singapore) Pte. Ltd., Singapore, SG;
Abstract
An acoustic resonator device includes a composite first electrode on a substrate, a piezoelectric layer on the composite electrode, and a second electrode on the piezoelectric layer. The first electrode includes a buried temperature compensating layer having a positive temperature coefficient. The piezoelectric layer has a negative temperature coefficient, and thus the positive temperature coefficient of the temperature compensating layer offsets at least a portion of the negative temperature coefficient of the piezoelectric layer.