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    • 12. 发明授权
    • Micro electromechanical isolator
    • 微机电隔离器
    • US06417743B1
    • 2002-07-09
    • US09400125
    • 1999-09-21
    • Robert E. MihailovichJun J. Yao
    • Robert E. MihailovichJun J. Yao
    • H03H900
    • H03H9/462
    • The present invention relates to a micro electromechanical (MEM) isolator in which an input signal induces an output signal by means of electrically insulating mechanical motion. The MEM isolator device comprises a dielectric moveable platform suspended above a substrate by flexible beams. A drive and a control capacitor each have one electrode supported by the platform and one electrode supported by the substrate. Coupling between electrical and mechanical energies is achieved by providing an input signal to the drive capacitor to induce platform motion. When the input signal is fed to the drive capacitor, it actuates electrostatic motion of the platform resulting in a change in the value of the control capacitance. The change in the control capacitance is converted via a simple electronics circuit into an output that mirrors the input but is electrically isolated therefrom. The advantages of such a device include simple electrical isolation provided by the dielectric platform, built in signal-debounce inherent to the structure mechanics, and economical integration with silicon integrated circuits.
    • 本发明涉及一种微机电(MEM)隔离器,其中输入信号通过电绝缘的机械运动来感应输出信号。 MEM隔离器装置包括通过柔性梁悬挂在衬底上的介电可移动平台。 驱动器和控制电容器各自具有由平台支撑的一个电极和由基板支撑的一个电极。 通过向驱动电容器提供输入信号以引起平台运动来实现电和机械能之间的耦合。 当输入信号被馈送到驱动电容器时,它致动平台的静电运动,导致控制电容值的变化。 控制电容的变化通过简单的电子电路转换成反映输入的输出,但与之电隔离。 这种器件的优点包括由介电平台提供的简单的电隔离,内置于结构力学固有的信号去抖动,以及与硅集成电路的经济集成。
    • 13. 发明授权
    • Micro electromechanical RF switch
    • 微机电RF开关
    • US5578976A
    • 1996-11-26
    • US493445
    • 1995-06-22
    • Jun J. Yao
    • Jun J. Yao
    • H01H1/20H01H59/00H01P1/10H01H57/00
    • H01H59/0009H01H1/20
    • A micro electromechanical RF switch is fabricated on a substrate using a suspended microbeam as a cantilevered actuator arm. From an anchor structure, the cantilever arm extends over a ground line and a gapped signal line that comprise microstrips on the substrate. A metal contact formed on the bottom of the cantilever arm remote from the anchor is positioned facing the signal line gap. An electrode atop the cantilever arm forms a capacitor structure above the ground line. The capacitor structure may include a grid of holes extending through the top electrode and cantilever arm to reduce structural mass and the squeeze damping effect during switch actuation. The switch is actuated by application of a voltage on the top electrode, which causes electrostatic forces to attract the capacitor structure toward the ground line so that the metal contact closes the gap in the signal line. The switch functions from DC to at least 4 GHz with an electrical isolation of -50 dB and an insertion loss of 0.1 dB at 4 GHz. A low temperature fabrication process allows the switch to be monolithically integrated with microwave and millimeter wave integrated circuits (MMICs). The RF switch has applications in telecommunications, including signal routing for microwave and millimeter wave IC designs, MEMS impedance matching networks, and band-switched tunable filters for frequency-agile communications.
    • 使用悬臂微束作为悬臂式致动器臂,在基板上制造微机电RF开关。 从锚结构中,悬臂在地线和覆盖信号线上延伸,该信号线在衬底上包括微带。 形成在远离锚固件的悬臂的底部上的金属接触件被定位成面对信号线间隙。 悬臂上方的电极在地线上方形成电容器结构。 电容器结构可以包括延伸穿过顶部电极和悬臂的孔格栅,以减少开关致动期间的结构质量和挤压阻尼效应。 通过在顶部电极上施加电压来致动开关,这导致静电力将电容器结构吸引到接地线,使得金属触点闭合信号线中的间隙。 该开关从DC到至少4 GHz,电隔离为-50 dB,在4 GHz时插入损耗为0.1 dB。 低温制造工艺允许开关与微波和毫米波集成电路(MMIC)单片集成。 RF开关具有电信应用,包括用于微波和毫米波IC设计的信号路由,MEMS阻抗匹配网络和用于频率敏捷通信的带通可调谐滤波器。
    • 16. 发明授权
    • Transistor microstructure
    • 晶体管微结构
    • US5397904A
    • 1995-03-14
    • US906873
    • 1992-07-02
    • Susanne C. ArneyNoel C. MacDonaldJun J. Yao
    • Susanne C. ArneyNoel C. MacDonaldJun J. Yao
    • H01L29/06H01L29/423H01L29/73H01L29/786
    • H01L29/0665B82Y10/00H01L29/0673H01L29/42384H01L29/7317H01L29/78654H01L29/78696
    • A method for isolating transistors and a microstructure for providing isolation for transistors includes a beam located on a substrate. The beam is formed from the same material as the substrate, preferably single crystal silicon, and is released so as to be suspended in the cavity and spaced apart from the substrate. The beam is supported in the cavity by a cantilever structure or by spaced pedestals, or both. One or more transistors are fabricated in the beam, and are thus isolated from the substrate and may be isolated from each other if desired. Contact beams may also be provided to contact the transistor electrodes for interconnection of adjacent transistors or connection of the transistors to electrical circuitry on the substrate. The contact beams also provide mechanical support for the beams.Multiple beams in side-by-side arrays or stacked arrays may be provided.
    • 用于隔离晶体管的方法和用于提供晶体管隔离的微结构包括位于衬底上的光束。 光束由与衬底相同的材料形成,优选为单晶硅,并且被释放以便悬挂在空腔中并与衬底间隔开。 梁通过悬臂结构或间隔开的支座或两者支撑在腔体中。 一个或多个晶体管制造在光束中,并且因此与衬底隔离,并且如果需要可以彼此隔离。 还可以提供接触光束以接触晶体管电极,用于相邻晶体管的互连或将晶体管连接到衬底上的电路。 接触梁还为梁提供机械支撑。 可以提供并排阵列或堆叠阵列中的多个光束。
    • 20. 发明授权
    • Signal-carrying flexure structure for micro-electromechanical devices
    • 用于微机电装置的信号承载挠曲结构
    • US07612423B2
    • 2009-11-03
    • US11218082
    • 2005-08-31
    • Jun J. Yao
    • Jun J. Yao
    • H01L29/78
    • H02N1/006
    • A signal-carrying flexure structure for a MEM device comprises at least two conductive flexure segments having respective cross-sectional areas, and at least one crosspiece affixed to the flexure segments to operatively couple the segments together such that the flexure segments and crosspiece form a single flexure structure. The resulting flexure structure's spring constant is less than that of a solid flexure having a comparable total cross-sectional area, while its resistance is approximately equal to that of the solid flexure.
    • 用于MEM装置的信号承载挠曲结构包括至少两个具有相应截面面积的导电弯曲部分,以及固定到挠曲部分的至少一个横档,以将该部分可操作地连接在一起,使得挠曲部分和横档形成单个 弯曲结构。 所产生的弯曲结构的弹簧常数小于具有相当的总横截面积的固体挠曲的弹簧常数,而其电阻近似等于固体挠曲的电阻。