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公开(公告)号：US20200295253A1
公开(公告)日：2020-09-17
申请号：US16814804
申请日：2020-03-10
发明人： Gouki WATANABE , Ryo ITO , Takayuki GOTO , Hiroyuki SHIMIZU , Sumiaki KISHIMOTO
IPC分类号： H01L41/187 , H01L41/047 , H01L41/083 , H01L41/09 , H01L41/273 , C04B35/495 , C04B37/00
摘要： A multilayer piezoelectric ceramic is such that: its piezoelectric ceramic layers do not contain lead as a constituent element, and have a perovskite compound expressed by the composition formula LixNayK1-x-yNbO3 (where 0.02
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2.发明申请公开(公告)号：US20190027677A1
公开(公告)日：2019-01-24
申请号：US16039159
申请日：2018-07-18
IPC分类号： H01L41/083 , H01L41/27 , H01L41/047 , H01L41/293 , H01L41/09 , H01L41/187
摘要： A multilayer piezoelectric element includes a ceramic base body, a pair of external electrodes, multiple internal electrodes, and surface electrodes. The ceramic base body is formed by a piezoelectric ceramic. The pair of external electrodes cover a pair of end faces. The multiple internal electrodes are stacked inside the ceramic base body along a thickness direction crossing at right angles with a longitudinal direction, and connected alternately to the pair of external electrodes in the thickness direction. The surface electrodes are provided on a pair of principal faces, respectively, and are each connected to the external electrode different from the one to which the internal electrode adjacent in the thickness direction is connected. The pair of external electrodes have a higher porosity than the surface electrodes.
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3.发明申请公开(公告)号：US20210162458A1
公开(公告)日：2021-06-03
申请号：US16952506
申请日：2020-11-19
摘要： Provided is a driving apparatus that sets a signal wave in a low-frequency region having a frequency of 10 Hz or more and 250 Hz or less as a modulating wave and outputs to a piezoelectric actuator a driving signal having a waveform obtained by modulating an amplitude of a sine wave in a high-frequency region having a frequency of 20 kHz or more and 40 kHz or less with the modulating wave.
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公开(公告)号：US20190237652A1
公开(公告)日：2019-08-01
申请号：US16258359
申请日：2019-01-25
IPC分类号： H01L41/083 , H01L41/09 , H01L41/047
CPC分类号： H01L41/083 , H01L41/0471 , H01L41/0477 , H01L41/09
摘要： A multi-layer piezoelectric ceramic component includes: a piezoelectric ceramic body having a cuboid shape, having upper and lower surfaces facing in a thickness direction, first and second end surfaces facing in a length direction, and a pair of side surfaces facing in a width direction, and including first and second regions; first internal electrodes in the first region; second internal electrodes in the second region; third internal electrodes in the first and second regions; a first terminal electrode formed on the first end surface and electrically connected to the first internal electrodes; a second terminal electrode formed on the first end surface and electrically connected to the second internal electrodes; a third terminal electrode formed on the second end surface and electrically connected to the third internal electrodes; a first surface electrode formed on the upper surface; and a second surface electrode formed on the lower surface.
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公开(公告)号：US20190237657A1
公开(公告)日：2019-08-01
申请号：US16258391
申请日：2019-01-25
IPC分类号： H01L41/273 , H01L41/083 , H01L41/187 , H01L41/047 , H01L41/297 , H01L41/338 , H01L41/312 , H01L41/09
CPC分类号： H01L41/273 , H01L41/0471 , H01L41/083 , H01L41/09 , H01L41/187 , H01L41/297 , H01L41/312 , H01L41/338
摘要： A method of producing a multi-layer piezoelectric ceramic component includes: laminating ceramic green sheets to form a laminate, each of the ceramic green sheets being made of a piezoelectric ceramic material and including an electrically conductive pattern, the electrically conductive pattern including a base metal, being to be an internal electrode, and being formed on an inner side of an outer edge of the ceramic green sheet; sintering the laminate; and cutting the sintered laminate and causing the internal electrodes to be exposed.
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6.发明申请公开(公告)号：US20180375010A1
公开(公告)日：2018-12-27
申请号：US16011286
申请日：2018-06-18
IPC分类号： H01L41/047 , B06B1/06 , H01L41/083 , H01L41/09 , H01L41/273 , H01L41/297 , H01L41/293 , H01L41/257
摘要： In an embodiment, a multilayer piezoelectric element includes a multilayer piezoelectric body and multiple internal electrodes. The multilayer piezoelectric body has a pair of principal faces in a first-axis direction, a pair of end faces in a second-axis direction crossing at right angles with the first-axis direction and defining the longitudinal direction, and a pair of side faces in a third-axis direction crossing at right angles with the first-axis direction and second-axis direction. The multiple internal electrodes are placed inside the multilayer piezoelectric body and stacked in the first-axis direction. Among the multiple internal electrodes, a center internal electrode placed at the center part of the multilayer piezoelectric body is such that its first cross-sectional shape, as viewed from the third-axis direction, has undulations greater than the undulations of the second cross-sectional shape of the center internal electrode as viewed from the second-axis direction.
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公开(公告)号：US20170263845A1
公开(公告)日：2017-09-14
申请号：US15455034
申请日：2017-03-09
IPC分类号： H01L41/047 , H01L41/29 , H01L41/273 , H01L41/187
CPC分类号： H01L41/0477 , H01L41/083 , H01L41/1873 , H01L41/273 , H01L41/29
摘要： A piezoelectric element which is a single-layer or laminated piezoelectric element has a first electrode, a second electrode, and a piezoelectric ceramic layer. The first electrode and second electrode contain silver by 50 percent by weight or more. The piezoelectric ceramic layer is placed between the first electrode and second electrode, and constituted by a polycrystalline substance of alkali niobate piezoelectric ceramic containing at least one alkali earth metal being calcium, strontium, or barium, and silver. According to this constitution, the electrical resistance and piezoelectric property can be improved, and consequently high reliability and good piezoelectric characteristics can be achieved.
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公开(公告)号：US20210376771A1
公开(公告)日：2021-12-02
申请号：US17207241
申请日：2021-03-19
摘要： A driving device generates a driving signal and outputs the driving signal to a piezoelectric element, the driving signal having a waveform obtained by using, as a first modulated wave, a first low-frequency wave having a frequency of 1 Hz or more and less than 100 Hz, using, as a second modulated wave, a waveform obtained by modulating an amplitude of a second low-frequency wave having a frequency of 100 Hz or more and 300 Hz or less with the first modulated wave, and modulating a high-frequency wave having a frequency of 20 kHz or more and 100 kHz or less with the second modulated wave.
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9.发明申请公开(公告)号：US20200287124A1
公开(公告)日：2020-09-10
申请号：US16800894
申请日：2020-02-25
IPC分类号： H01L41/187 , H01L41/047 , H01L41/43
摘要： A piezoelectric ceramic, which does not contain lead as a constituent element, is characterized in that: its primary component is a perovskite compound expressed by the composition formula (Bi0.5−x/2Na0.5−x/2Bax)(Ti1−yMny)O3 (where 0.01≤x≤0.25, 0.001≤y≤0.020); and the coefficient of variation (CV) in grain size among the grains contained therein is 35 percent or lower. The piezoelectric ceramic presents an improved dielectric loss tangent tan δ.
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公开(公告)号：US20190237656A1
公开(公告)日：2019-08-01
申请号：US16258376
申请日：2019-01-25
IPC分类号： H01L41/187 , H01L41/047 , H01L41/083 , H01L41/09
CPC分类号： H01L41/187 , H01L41/0471 , H01L41/083 , H01L41/09
摘要： A multi-layer piezoelectric ceramic component includes: a piezoelectric ceramic body having a cuboid shape having upper and lower surfaces facing in a thickness direction, first and second end surfaces facing in a length direction, and a pair of side surfaces facing in a width direction; first internal electrodes formed in the piezoelectric ceramic body and drawn to the first end surface; second internal electrodes formed in the piezoelectric ceramic body and drawn to the second end surface; a first terminal electrode formed on the first end surface; and a second terminal electrode formed on the second end surface, the first and second internal electrodes each having a width equal to a distance between the pair of side surfaces, at least one of the pair of side surfaces including a groove extending in non-parallel with the length direction.
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