Micro-electromechanical system devices
    9.
    发明授权
    Micro-electromechanical system devices 有权
    微机电系统设备

    公开(公告)号:US08993394B2

    公开(公告)日:2015-03-31

    申请号:US13685684

    申请日:2012-11-26

    CPC classification number: B81C1/00246 B81B2201/0271 B81C2203/0742

    Abstract: Micro-electromechanical system (MEMS) devices and methods of manufacture thereof are disclosed. In one embodiment, a MEMS device includes a semiconductive layer disposed over a substrate. A trench is disposed in the semiconductive layer, the trench with a first sidewall and an opposite second sidewall. A first insulating material layer is disposed over an upper portion of the first sidewall, and a conductive material disposed within the trench. An air gap is disposed between the conductive material and the semiconductive layer.

    Abstract translation: 公开了微机电系统(MEMS)装置及其制造方法。 在一个实施例中,MEMS器件包括设置在衬底上的半导体层。 沟槽设置在半导体层中,沟槽具有第一侧壁和相对的第二侧壁。 第一绝缘材料层设置在第一侧壁的上部之上,并且设置在沟槽内的导电材料。 在导电材料和半导体层之间设置气隙。

    Detecting capacitive faults and sensitivity faults in capacitive sensors

    公开(公告)号:US11953533B2

    公开(公告)日:2024-04-09

    申请号:US17347776

    申请日:2021-06-15

    CPC classification number: G01R27/2605 G01R27/28 G01R31/2843

    Abstract: A capacitive sensor includes a first conductive structure; a second conductive structure that is counter to the first conductive structure, wherein the second conductive structure is movable relative to the first conductive structure in response to an external force acting thereon, wherein the second conductive structure is capacitively coupled to the first conductive structure to form a first capacitor having a first capacitance that changes with a change in a distance between the first conductive structure and second conductive structure; a signal generator configured to apply a first electrical signal step at an input or at an output of the first capacitor to induce a first voltage transient response at the output of first capacitor; and a diagnostic circuit configured to detect a fault in the capacitive sensor by measuring a first time constant of the first voltage transient response and detecting the fault based on the first time constant.

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