High contrast spatial light modulator
First Claim
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1. A spatial light modulator, comprising:
- a substrate having a plurality of electrodes;
a mirror plate suspended over the plurality of electrodes, the mirror plate having an upper reflective surface and a lower surface, the mirror plate having an upper layer and a lower layer, the upper layer formed of a highly reflective material and the lower layer having a different composition from the upper layer;
a support post on the substrate; and
a torsion hinge connecting the support post to the mirror plate, the torsion hinge positioned in the recess of the mirror plate and permitting the mirror plate to rotate about an axis of the torsion hinge;
wherein the lower layer includes doped silicon and an aluminum alloy.
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Abstract
A high contrast spatial light modulator for display and printing is fabricated by coupling a high active reflection area fill-ratio and non-diffractive micro mirror array with a high electrostatic efficiency and low surface adhesion control substrate.
19 Citations
16 Claims
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1. A spatial light modulator, comprising:
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a substrate having a plurality of electrodes; a mirror plate suspended over the plurality of electrodes, the mirror plate having an upper reflective surface and a lower surface, the mirror plate having an upper layer and a lower layer, the upper layer formed of a highly reflective material and the lower layer having a different composition from the upper layer; a support post on the substrate; and a torsion hinge connecting the support post to the mirror plate, the torsion hinge positioned in the recess of the mirror plate and permitting the mirror plate to rotate about an axis of the torsion hinge; wherein the lower layer includes doped silicon and an aluminum alloy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification