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- W3080189216 abstract "This article presents the design, development, and characterization of a double-bridge electrostatically actuated micromirror for multiobject spectroscopy (MOS). The proposed structure is an improvement over singlebridge micromirrors in terms of aperture size, pull-in voltage, degrees of freedom, and fill factor. The two-axis symmetric rotation mechanism of the proposed micromirror is achieved by bending and twisting action of the suspended cantilevers which is contrary to the twisting cantilevers of a conventional one-axis torsional micromirror. The placement of anchor and cantilevers under the mirror plate results in a high fill factor when arranged in a 2-D array. The analytical modeling, design optimization, and static and dynamic analysis are done using finite-element method (FEM) in Coventorware. An optimized design is fabricated using a simple approach of surface micromachining and electroplating. For a micromirror of size 200 μm x 200 μm and the actuation gap of 2.5 μm, the device exhibits a tilt angle of 1.5 <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>o</sup> at a pull-in voltage of 23.1 V, a switching time of 38 μs, and the resonance frequency of 35.23 kHz. A 3 x 3 array of the micromirror is demonstrated with a fill factor of more than 95%. The deflection range can be increased by simply increasing the thickness of the sacrificial layer and without any major process modification." @default.
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- W3080189216 date "2020-10-01" @default.
- W3080189216 modified "2023-09-27" @default.
- W3080189216 title "Design and Development of a Double-Bridge Micromirror With Bending and Twisting Cantilevers for Multiobject Spectroscopy" @default.
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- W3080189216 doi "https://doi.org/10.1109/ted.2020.3016624" @default.
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