INHIBITING PROPAGATION OF SURFACE CRACKS IN A MEMS DEVICE
    130.
    发明申请
    INHIBITING PROPAGATION OF SURFACE CRACKS IN A MEMS DEVICE 有权
    抑制MEMS器件中表面裂纹的传播

    公开(公告)号:US20140287547A1

    公开(公告)日:2014-09-25

    申请号:US13848819

    申请日:2013-03-22

    Applicant: Chad S. Dawson

    Inventor: Chad S. Dawson

    CPC classification number: B81B7/0016 B81B3/0078 B81C2201/017

    Abstract: A microelectromechanical systems (MEMS) device (58) includes a structural layer (78) having a top surface (86). The top surface (86) includes surface regions (92, 94) that are generally parallel to one another but are offset relative to one another such that a stress concentration location (90) is formed between them. Laterally propagating shallow surface cracks (44) have a tendency to form in the structural layer (78), especially near the joints (102) between the surface regions (92, 94). A method (50) entails fabricating (52) the MEMS device (58) and forming (54) trenches (56) in the top surface (86) of the structural layer (78) of the MEMS device (58). The trenches (56) act as a crack inhibition feature to largely prevent the formation of deep cracks in structural layer (78) which might otherwise result in MEMS device failure.

    Abstract translation: 微机电系统(MEMS)装置(58)包括具有顶表面(86)的结构层(78)。 顶表面(86)包括通常彼此平行但相对于彼此偏移的表面区域(92,94),使得在它们之间形成应力集中位置(90)。 横向传播的浅表面裂纹(44)在结构层(78)中尤其是在表面区域(92,94)之间的接头(102)附近形成倾向。 方法(50)需要在MEMS装置(58)的结构层(78)的顶表面(86)中制造(52)MEMS器件(58)并形成(54)沟槽(56)。 沟槽(56)用作裂纹抑制特征,以大大地防止在结构层(78)中形成深裂纹,否则可能导致MEMS器件失效。

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