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:
Aug. 25, 2009
Filed:
Jan. 18, 2006
Applicants:
Anke Althoff, St.-Andrä-Wördem, AT;
Adalbert Feltz, Deutschlandsberg, AT;
Heinz Florian, Bad Gams, AT;
Inventors:
Anke Althoff, St.-Andrä-Wördem, AT;
Adalbert Feltz, Deutschlandsberg, AT;
Heinz Florian, Bad Gams, AT;
Assignee:
EPCOS AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 41/083 (2006.01);
U.S. Cl.
CPC ...
Abstract
A piezoelectric actuator includes a stack of piezoceramic layers and electrodes among the piezoceramic layers. At least one edge region of the stack does not include electrodes. A cover layer is at the at least one edge region. The cover layer has a dielectric constant that is less than a dielectric constant of a piezoceramic layer.