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公开(公告)号：US20240048899A1
公开(公告)日：2024-02-08
申请号：US18374993
申请日：2023-09-29
CPC分类号： H04R1/345 , B81B3/0021 , B81B2201/038 , B81B2203/0109 , H04R2201/003 , H04R31/00
摘要： An MEMS sound transducer is provided, having: at least one actuator; a radiation structure coupled to the actuator and configured as a separate element; a structure surrounding the radiation structure, wherein the radiation structure is separated from the surrounding structure by one or more gaps; and at least one screen arranged along at least one of the one or more gaps.
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公开(公告)号：US20230354713A1
公开(公告)日：2023-11-02
申请号：US18220666
申请日：2023-07-11
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. , Christian-Albrechts-Universitaet zu Kiel
发明人： Bernhard WAGNER , Fabian LOFINK , Dirk KADEN , Simon FICHTNER
CPC分类号： H10N30/853 , H10N30/2042 , B81B7/02 , H10N30/1051 , H10N30/045 , H10N30/50 , B81B2201/03
摘要： A ferroelectric material includes a mixed crystal having AlN and at least one nitride of a transition metal. The proportion of the nitride of the transition metal is selected such that a direction of an initial or spontaneous polarity of the ferroelectric material is switchable by applying a switchover voltage. The switchover voltage is below a breakdown voltage of the ferroelectric material.
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公开(公告)号：US20230319485A1
公开(公告)日：2023-10-05
申请号：US18129548
申请日：2023-03-31
CPC分类号： H04R19/02 , H04R7/06 , H04R7/18 , B81B3/0067 , H04R2201/003 , H04R2440/01 , B81B2203/0127
摘要： Embodiments of the present disclosure describe an MEMS sound transducer having an actuator and a structure surrounding the actuator, wherein the actuator is separated from the surrounding structure by one or several slits. Furthermore, the sound transducer includes at least one first diaphragm arranged on the actuator along at least one of the one or several slits; and at least one second diaphragm arranged on the surrounding structure along the slit of the one or several slits.
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公开(公告)号：US20210268470A1
公开(公告)日：2021-09-02
申请号：US17322637
申请日：2021-05-17
发明人： Thomas LISEC , Steffen CHEMNITZ , Bernhard WAGNER
IPC分类号： B01J19/00
摘要： An apparatus includes a substrate having a recess and a multitude of particles arranged in the recess. A first portion of the particles is joined to a porous structure by means of a coating. A second portion of the particles is not joined by means of the coating. The first portion of the particles is arranged closer to an opening of the recess than the second portion of the particles so that a leaking of the second portion of the particles from the recess through the opening is prevented.
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公开(公告)号：US20200100033A1
公开(公告)日：2020-03-26
申请号：US16693016
申请日：2019-11-22
摘要： A micromechanical sound transducer according to a first aspect includes a first bending transducer with a free end and a second bending transducer with a free end, the two bending transducers being arranged in a mutual plane, wherein the free end of the first bending transducer is separated from the free end of the second bending transducer via a slit. The second bending transducer is excited in-phase with the vertical vibration of the first bending transducer. A micromechanical sound transducer according to a second aspect includes a first bending transducer that is excited to vibrate vertically and a diaphragm element extending vertically to the first bending transducer, the diaphragm element being separated from a free end of the first bending transducer via a slit.
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公开(公告)号：US20180029002A1
公开(公告)日：2018-02-01
申请号：US15728167
申请日：2017-10-09
发明人： Thomas LISEC , Steffen CHEMNITZ , Bernhard WAGNER
IPC分类号： B01J19/00
CPC分类号： B01J19/0093 , B01J2219/00783 , B01J2219/0079 , B01J2219/00824 , B01J2219/00831 , B01J2219/00833 , B01J2219/00835 , B01J2219/00844 , B01J2219/00849 , B01J2219/00853 , B01J2219/00873 , B01J2219/00885 , B01J2219/00907 , B01J2219/00918 , B01J2219/00952
摘要： An apparatus includes a substrate having a recess and a multitude of particles arranged in the recess. A first portion of the particles is joined to a porous structure by means of a coating. A second portion of the particles is not joined by means of the coating. The first portion of the particles is arranged closer to an opening of the recess than the second portion of the particles so that a leaking of the second portion of the particles from the recess through the opening is prevented.
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公开(公告)号：US20170325030A1
公开(公告)日：2017-11-09
申请号：US15448846
申请日：2017-03-03
发明人： Fabian STOPPEL , Bernhard WAGNER
CPC分类号： H04R17/00 , H01L41/0946 , H04R3/002 , H04R29/001 , H04R2201/003
摘要： A MEMS includes a diaphragm, a stroke structure coupled to the diaphragm, and at least two piezoelectric actuators coupled to a plurality of mutually spaced-apart contact points of the stroke structure via a plurality of mutually spaced-apart connecting elements, the at least two piezoelectric actuators being configured to cause a stroke movement of the stroke structure so as to deflect the diaphragm.
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