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:
Dec. 07, 1999
Filed:
Jan. 27, 1998
Seung-Eek Park, State College, PA (US);
Thomas R Shrout, Port Matilda, PA (US);
Patrick D Lopath, Port Matilda, PA (US);
The Penn State Research Foundation, University Park, PA (US);
Abstract
<001>oriented crystals of lead zinc niobate--lead titanate solid solution (0 to 5 mole % lead titanate) have high electromechanical coupling>85% and exhibit electric field induced phase transition at electric field levels>10.times.Ec (where Ec is the coercive field), resulting in increased transducer driving voltages, decreased fabrication degradation, and high sensitivity/large bandwidth transducer characteristics due to high electromechanical couplings, up to 92%. <001>oriented crystals of lead magnesium niobate--lead titanate solid solution (20 to 50 mole % lead titanate) also exhibit high electromechanical couplings>85% and up to 94%, and thereby can be formed into transducers which exhibit both high sensitivity and large bandwidth.