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:
Nov. 15, 2016
Filed:
Oct. 05, 2012
Centre National DE LA Recherche Scientifique (C.n.r.s), Paris, FR;
Universite DE Franche-comte, Besancon, FR;
Sylvain Ballandras, Besancon, FR;
Gwenn Ulliac, Besancon, FR;
Blandine Edouard-Guichardaz, Auxon-Dessous, FR;
Florent Bassignot, Besancon, FR;
Emilie Courjon, Besancon, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (C.N.R.S), Paris, FR;
UNIVERSITE DE FRANCHE-COMTE, Besancon, FR;
Abstract
A piezoelectric and ferroelectric bulk wave transducer operating at a predetermined frequency includes a block of substrate, having a first thickness and in a first material, and a piezoelectric and ferroelectric transduction plate, having a length, a width and a second thickness, and in a second piezoelectric material, first and second metal electrodes covering the plate in the direction of the length thereof. The plate has first and second ferroelectric domains with alternating polarizations, distributed along the length of the plate according to a periodic pattern of pitch. The plate is attached perpendicularly to the block so that the width of the plate and the first thickness of the block are the same direction. The first and second material, the first thickness of the block, the length, the width, the second thickness, the pitch of the plate are configured for generating and trapping bulk waves at the operating frequency of the transducer, guided between both electrodes.