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Method and structure for fabricating smooth mirrors for liquid crystal on silicon devices
   
Document Number
US Patent 7527993
Issued Date
May 5, 2009
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Inventors
Lee; Roger (Shanghai,CN)
Chang; Lee (Shanghai,CN)
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Abstract
A method for fabricating a liquid crystal on silicon display device. The method includes providing a substrate, e.g., silicon wafer. The method includes forming a transistor layer overlying the substrate. Preferably, the transistor layer has a plurality of MOS devices therein. The method includes forming an interlayer dielectric layer (e.g., BPSG, FSG) overlying the transistor layer. The method includes planarizing the interlayer dielectric layer and forming a sacrificial layer (e.g., bottom antireflective coating, polymide, photoresist, polysilicon) overlying the planarized interlayer dielectric layer. The method includes forming a plurality of recessed regions within a portion of the interlayer dielectric layer through the sacrificial layer while other portions of the interlayer dielectric layer remain intact. Preferably, lithographic techniques are used for forming the recessed regions. The method includes forming an aluminum layer (or other reflective layer or multilayers) to fill the recessed regions and overlying remaining portions of the sacrificial layer and selectively removing the aluminum layer overlying portions of the sacrificial layer to form a plurality of electrode regions corresponding to each of the recessed regions.
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Number of Claims:
11
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Published
May 5, 2009
Application Number
10/927,707
Filed
August 26, 2004
US Classification
438/30   438/672
Int'l Classification
H01L   21/00   (20060101)  
Examiner
Assistant Examiner
USPTO Field of Search
438/30   438/149   438/688   438/672   438/675   438/612   438/613   438/614   438/615   438/616   438/617   438/618   438/619   438/620   438/621   438/622   438/623   438/624   438/625   438/626   438/627   438/628   438/629   438/630   438/631   438/632   438/633   438/634   438/635   438/636   438/637   438/638   438/639   438/640   438/641   438/642   438/643   438/644   438/645   438/646   438/647   438/648   438/649   438/650   438/651  
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