Fabrication of a reflective spatial light modulator
First Claim
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1. A method of fabricating a spatial light modulator, comprising:
- forming cavities in a first side of a first substrate;
fabricating electrodes on a first side of a second substrate;
bonding the first side of the first substrate to the first side of the second substrate; and
forming hinges, connectors, and mirror plates on a second side of the first substrate after bonding the first side of the first substrate to the first side of the second substrate.
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Abstract
Fabrication of a reflective spatial light modulator including a micro-mirror array. In one embodiment, the micro mirror array is fabricated from a substrate that is a single crystal material by only two main etching steps. A first etch forms cavities in a first side of the material. A second etch forms support posts, a vertical hinge, and a mirror plate. Between the first and second etches, the substrate can be bonded to addressing and control circuitry.
73 Citations
20 Claims
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1. A method of fabricating a spatial light modulator, comprising:
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forming cavities in a first side of a first substrate;
fabricating electrodes on a first side of a second substrate;
bonding the first side of the first substrate to the first side of the second substrate; and
forming hinges, connectors, and mirror plates on a second side of the first substrate after bonding the first side of the first substrate to the first side of the second substrate. - View Dependent Claims (2, 3, 4, 5)
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6. A method of fabricating a plurality of mirrors for a spatial light modulator, comprising:
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generating a first mask defining areas to be etched from a first side of a first substrate;
removing material in the areas on the first side of the first substrate defined by the first mask;
thinning a second side of the first substrate to a predetermined thickness;
creating a reflective surface on the second side of the first substrate;
generating a second mask defining areas to be etched from the second side of the first substrate; and
removing material in the areas on the second side of the first substrate defined by the second mask to form a plurality of hinges and mirror plates. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A method of fabricating a spatial light modulator including an array of a plurality of mirrors, comprising:
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generating a first mask defining areas to be etched from a first side of a first substrate;
etching the areas on the first side of the first substrate defined by the first mask to form a plurality of cavities in the first side of the first substrate;
fabricating electrodes on a first side of a second substrate;
bonding the first side of the first substrate to the first side of the second substrate;
creating a reflective surface on the second side of the first substrate;
generating a second mask defining areas to be etched from the second side of the first substrate; and
etching the areas on the second side of the first substrate defined by the second mask to form a plurality of hinges and mirror plates. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification