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1.发明公开TRANSDUCTEUR ÉLECTROACOUSTIQUE À POLARISATION FERROÉLECTRIQUE PÉRIODIQUE RÉALISÉ SUR UNE STRUCTURE VERTICALE MICRO USINÉE 有权具周期FERRO电极化电声转换在微观装配式结构VERTIKALERN
公开(公告)号：EP2764616A1
公开(公告)日：2014-08-13
申请号：EP12769653.2
申请日：2012-10-05
发明人： BALLANDRAS, Sylvain , ULLIAC, Gwenn , EDOUARD-GUICHARDAZ, Blandine , BASSIGNOT, Florent , COURJON, Emilie
摘要： A volume wave piezoelectric and ferroelectric transducer operating at a predetermined frequency
f comprises a substrate block (4), having a first thickness e1 and consisting of a first material, and a piezoelectric and ferroelectric transducer plate (6), having a length L, a width I and a second thickness e2, and consisting of a second piezoelectric material, a first and a second metal electrodes (12, 14) covering the piezoelectric transducer plate (6) in the lengthwise direction. The piezoelectric and ferroelectric transducer plate (6) comprises ferroelectric first domains and second domains (17, 18) with alternating polarizations, distributed in the lengthwise direction L of the plate in a periodic pattern of pitch p. The piezoelectric transducer plate (6) is fixed perpendicular to the substrate block (4) such that the width
I of the piezoelectric transducer plate (6) and the first thickness e1 of the substrate block (4) are in the same direction. The first material, the second material, the first thickness of the substrate block (4), the length L, the width I, the second thickness e2, the pitch
p of the transducer plate (6) are configured for creating and trapping volume waves at the operating frequency of the transducer guided between the two electrodes (12, 14).-
2.发明授权TRANSDUCTEUR ÉLECTROACOUSTIQUE À POLARISATION FERROÉLECTRIQUE PÉRIODIQUE RÉALISÉ SUR UNE STRUCTURE VERTICALE MICRO USINÉE 有权具周期FERRO电极化电声转换在微观装配式结构VERTIKALERN
公开(公告)号：EP2764616B1
公开(公告)日：2015-12-16
申请号：EP12769653.2
申请日：2012-10-05
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公开(公告)号：EP2324516B1
公开(公告)日：2012-06-06
申请号：EP09740349.7
申请日：2009-09-17
申请人： Etat Français représenté par le Délégué Général pour L'Armement , Centre National de la Recherche Scientifique , Université de Franche-Comté
CPC分类号： H03H9/02228 , H03H9/02574 , H03H9/25 , H03H9/64
摘要： The invention pertains to the field of acoustic wave devices, particularly to that of transducers capable of operating at very high frequencies from some hundreds of MHz up to several GHz, and more particularly relates to an interface acoustic wave device (1) that comprises at least two substrates and a layer (2) made of a ferroelectric material, the latter being provided between a first electrode (3) and a second electrode (4) and including first positive-polarisation domains (7) and second negative-polarisation domains (8), the first and second domains being alternated, wherein said device is characterised in that the assembly comprising the first electrode (3), the ferroelectric material layer (2), and the second electrode (4), is provided between a first substrate (5) and a second substrate (6).
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公开(公告)号：EP2324516A1
公开(公告)日：2011-05-25
申请号：EP09740349.7
申请日：2009-09-17
申请人： Etat Français représenté par le Délégué Général pour L'Armement , Centre National de la Recherche Scientifique , Université de Franche-Comté
CPC分类号： H03H9/02228 , H03H9/02574 , H03H9/25 , H03H9/64
摘要： The invention pertains to the field of acoustic wave devices, particularly to that of transducers capable of operating at very high frequencies from some hundreds of MHz up to several GHz, and more particularly relates to an interface acoustic wave device (1) that comprises at least two substrates and a layer (2) made of a ferroelectric material, the latter being provided between a first electrode (3) and a second electrode (4) and including first positive-polarisation domains (7) and second negative-polarisation domains (8), the first and second domains being alternated, wherein said device is characterised in that the assembly comprising the first electrode (3), the ferroelectric material layer (2), and the second electrode (4), is provided between a first substrate (5) and a second substrate (6).
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