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    • 4. 发明授权
    • Acceleration sensor
    • 加速度传感器
    • US08497672B2
    • 2013-07-30
    • US12881765
    • 2010-09-14
    • Takashi KawakuboToshihiko NaganoMichihiko NishigakiHiroshi Ono
    • Takashi KawakuboToshihiko NaganoMichihiko NishigakiHiroshi Ono
    • G01P15/00
    • G01P15/097G01P15/0888G01P15/18G01P2015/0817G01P2015/0845
    • The present embodiments provide an acceleration sensor, which enables highly accurate detection and has an extremely compact size. The acceleration sensor of the present embodiments is provided with a substrate, a anchor portion formed on the substrate, a support beam, which has one end connected to the anchor portion and extends across a space from the substrate, and a proof mass which is connected to the other end of the support beam and held across a space from the substrate. The acceleration sensor is further provided with first and second piezoelectric bending resonators, a comparison unit, and a calculation unit. The first and second piezoelectric bending resonators have one end connected to the anchor portion and the other end connected to the proof mass or the support beam and have a stack of a first electrode, a first piezoelectric film, and a second electrode. The first and second piezoelectric bending resonators extend on the both sides of the support beam and perform bending resonance motion in a direction perpendicular to the piezoelectric film. The comparison unit measures a difference of a resonance frequency between the first and second piezoelectric bending resonators. The calculation unit calculates an acceleration in a direction perpendicular to the extending direction of the support beam in the substrate surface from the difference of the resonance frequency.
    • 本实施例提供加速度传感器,其能够进行高精度的检测并具有非常紧凑的尺寸。 本实施例的加速度传感器设置有基板,形成在基板上的锚固部分,支撑梁,其一端连接到锚定部分并且延伸穿过基板的空间,以及连接的检测质量块 到支撑梁的另一端并且保持在与基板的空间上。 加速度传感器还设置有第一和第二压电弯曲谐振器,比较单元和计算单元。 第一和第二压电弯曲谐振器的一端连接到锚定部分,另一端连接到检测质量块或支撑梁,并且具有第一电极,第一压电膜和第二电极的堆叠。 第一和第二压电弯曲谐振器在支撑梁的两侧延伸,并在垂直于压电薄膜的方向上进行弯曲共振运动。 比较单元测量第一和第二压电弯曲谐振器之间的谐振频率的差。 计算单元从谐振频率的差计算与基板表面中的支撑梁的延伸方向垂直的方向的加速度。
    • 7. 发明授权
    • Actuator and electronic hardware using the same
    • 执行器和电子硬件使用相同
    • US07830068B2
    • 2010-11-09
    • US12354182
    • 2009-01-15
    • Michihiko NishigakiToshihiko NaganoKazuhiko ItayaTakashi Kawakubo
    • Michihiko NishigakiToshihiko NaganoKazuhiko ItayaTakashi Kawakubo
    • H01L41/08
    • H01H57/00B81B3/0021B81B2201/032H01G5/18H01H2057/006H01L41/094H01L41/0973
    • An actuator includes a first beam, a first fixed part, a second beam, a first connective part, and a first fixed electrode. The first beam extends from a first fixed end to a first connective end, and the first fixed part connects the first fixed end and the substrate and supports the first beam above a main surface of the substrate with a gap. The second beam extends from a second connective end to a first action end and is provided in parallel to the first beam, and has a first division part divided by a first slit extending from the first action end toward the second connective end. The first connective part connects the first connective end and the second connective end and holds the second beam above the main surface of the substrate with a gap. The first fixed electrode is provided on the main surface of the substrate being configured to be opposed to a part of the first division part on a side of the first action end.
    • 致动器包括第一光束,第一固定部分,第二光束,第一连接部分和第一固定电极。 第一光束从第一固定端延伸到第一连接端,并且第一固定部分连接第一固定端和衬底,并且将第一光束以间隙支撑在衬底的主表面上方。 第二光束从第二连接端部延伸到第一动作端部并且平行于第一光束提供,并且具有由从第一动作端向第二连接端部延伸的第一狭缝分割的第一分割部分。 第一连接部分连接第一连接端和第二连接端,并且将第二光束以间隙保持在基板的主表面上方。 第一固定电极设置在基板的主表面上,该主表面被配置为与第一动作端侧的第一分割部分的一部分相对。
    • 8. 发明授权
    • Piezoelectric driven MEMS apparatus and portable terminal
    • 压电驱动MEMS器件和便携式终端
    • US07816841B2
    • 2010-10-19
    • US12133027
    • 2008-06-04
    • Takashi KawakuboToshihiko NaganoMichihiko Nishigaki
    • Takashi KawakuboToshihiko NaganoMichihiko Nishigaki
    • H01L41/08
    • H01G5/16H01H2057/006H01L41/094H01L41/0946
    • A piezoelectric driven MEMS apparatus includes: a substrate; a support part provided on the substrate; a fixed electrode provided on the substrate; and an actuator having a first electrode film, a piezoelectric film formed on the first electrode film, and a second electrode film formed on the piezoelectric film, a first end of the actuator being supported by the support part, a second end of the actuator being disposed so as to be opposed to the fixed electrode. The second end of the actuator is divided into a plurality of electrode parts by a plurality of slits which pass through the first electrode film, the piezoelectric film and the second electrode film, at least a part of each electrode part is linked to parts of adjacent electrode parts, and each electrode part is capable of generating bending deformation individually.
    • 压电驱动MEMS装置包括:基板; 设置在基板上的支撑部; 设置在基板上的固定电极; 以及致动器,其具有第一电极膜,形成在所述第一电极膜上的压电膜和形成在所述压电膜上的第二电极膜,所述致动器的第一端由所述支撑部支撑,所述致动器的第二端为 被设置为与固定电极相对。 致动器的第二端通过穿过第一电极膜,压电膜和第二电极膜的多个狭缝分成多个电极部分,每个电极部分的至少一部分连接到相邻部分 电极部分,并且每个电极部分能够分别产生弯曲变形。