Microelectromechanical device with thermal expansion balancing layer or stiffening layer
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United States of America Patent
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Apr 24, 2012
Grant Date -
Sep 17, 2009
app pub date -
Feb 22, 2008
filing date -
Feb 22, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An interferometric modulating device is provided with a thermal expansion balancing layer on a side of the movable flexible layer opposite the movable reflector such that when temperature changes the distance between the movable reflector and the optical stack does not change significantly, thereby leading to stable color. Additionally, an interferometric modulating device is provided with a stiffening layer between the movable flexible layer and the movable reflector and at least one hollow void exists on the surface where the movable reflector and the stiffening layer contact each other so that the movable reflector is more rigid to bending, thereby reducing the temperature sensitivity of the movable reflector.
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