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. 05, 2000
Filed:
Aug. 21, 1998
Stephen Clark, Norfolk, VA (US);
Face International Corp., Norfolk, VA (US);
Abstract
A method for manufacturing a multi-layer piezoelectric transducer having enhanced mechanical output displacement capability resulting from an increase in the amount of 'pre-stress' applied to the electroactive (ceramic) layer by the pre-stress layer. The pre-stress layer is heated to a temperature above the temperature of the ceramic layer and bonded at an elevated temperature to the ceramic layer, such that, as the pre-stress layer subsequently cools down to ambient temperature, it applies a compressive stress to the ceramic layer. During the step of cooling the layers to ambient temperature, the temperature drop of the pre-stress layer is greater than the temperature drop of the ceramic layer, thereby increasing the amount of 'pre-stress' applied to the electroactive (ceramic) layer by the pre-stress layer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile