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:
Mar. 04, 2003
Filed:
Mar. 13, 2000
Applicant:
Inventors:
Ytshak Avrahami, Somerville, MA (US);
Harry L. Tuller, Wellesley, MA (US);
Assignee:
Massachusetts Institute of Technology, Cambridge, MA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 3/00 ; H01L 4/104 ; C04B 3/500 ;
U.S. Cl.
CPC ...
G01N 3/00 ; H01L 4/104 ; C04B 3/500 ;
Abstract
A piezoelectric transducer includes a barium-titanate-based piezoelectric material having a poled, rhombohedral structure. The rhombohedral barium titanate structure can include a dopant, such as KNbO , BaHfO , BaSnO , BaZrO or KTaO . The piezoelectric transducer can be used either as an actuator or as a sensor.