This paper presents a novel CMOS-compatible fabrication process and evaluations of a micro mirror array (MMA) made of mono-crystalline silicon (m-Si) for adaptive optic (...Show More
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Abstract:
This paper presents a novel CMOS-compatible fabrication process and evaluations of a micro mirror array (MMA) made of mono-crystalline silicon (m-Si) for adaptive optic (AO) applications. The m-Si mirror layer is transfer bonded from a silicon-on-insulator (SOI) donor wafer with adhesive wafer bonding towards an intermediate patterned polymer spacer layer and clamped with metal plating. We present a CMOS compatible, bond alignment-free fabrication scheme offering the potential for high air gap distances between substrate and mirrors and we show first measurements of the fabricated mirrors.
Micro-mirrors have found a wide range of applications in the past decades, e.g. in projection systems [1], optical scanners [2], optical switches [3] and maskless lithography systems [4] to mention a few examples.
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1.
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