METHOD FOR MANUFACTURING MEMS TORSIONAL ELECTROSTATIC ACTUATOR

    公开(公告)号:US20170174508A1

    公开(公告)日:2017-06-22

    申请号:US15327230

    申请日:2015-07-31

    Inventor: Errong JING

    Abstract: A method for manufacturing an MEMS torsional electrostatic actuator comprises: providing a substrate, wherein the substrate comprises a first silicon layer, a buried oxide layer and a second silicon layer that are laminated sequentially; patterning the first silicon layer and exposing the buried oxide layer to form a rectangular upper electrode plate separated from a peripheral region, wherein the upper electrode plate and the peripheral region are connected by only using a cantilever beam, and forming, on the peripheral region, a recessed portion exposing the buried oxide layer; patterning the second silicon layer and exposing the buried oxide layer to form a back cavity, wherein the back cavity is located in a region of the second silicon layer corresponding to the upper electrode plate, covers 40% to 60% of the area of the region corresponding to the upper electrode plate, and is close to one end of the cantilever beam; exposing the second silicon layer, and suspending the upper electrode plate and the cantilever beam; and respectively forming an upper contact electrode and a lower contact electrode on the second silicon layer.

    ETCH RELEASE RESIDUE REMOVAL USING ANHYDROUS SOLUTION
    100.
    发明申请
    ETCH RELEASE RESIDUE REMOVAL USING ANHYDROUS SOLUTION 有权
    使用非离子解决方案去除蚀刻残留物

    公开(公告)号:US20150368099A1

    公开(公告)日:2015-12-24

    申请号:US14307877

    申请日:2014-06-18

    Abstract: A method of making a microelectromechanical systems (MEMS) device includes etching away a sacrificial material layer to release a mechanical element of the MEMS device. The MEMS device is formed at least partially on the sacrificial material layer, and the etching leaves a residue in proximity to the mechanical element. The residue is exposed to an anhydrous solution to remove the residue. The residue may be an ammonium fluorosilicate-based residue, and the anhydrous solution may include acetic acid, isopropyl alcohol, acetone, or any anhydrous solution that can effectively dissolve the ammonium fluorosilicate-based residue.

    Abstract translation: 制造微机电系统(MEMS)器件的方法包括蚀刻掉牺牲材料层以释放MEMS器件的机械元件。 MEMS器件至少部分地形成在牺牲材料层上,蚀刻在机械元件附近留下残留物。 将残余物暴露于无水溶液中以除去残余物。 残渣可以是氟硅酸铵系残渣,无水溶液可以含有乙酸,异丙醇,丙酮或能够有效溶解氟硅酸铵残渣的任意无水溶液。

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