Micro mirror unit including mirror substrate and wiring substrate spaced by conductive spacer
First Claim
Patent Images
1. A micro mirror unit comprising:
- a micro mirror substrate that includes a mirror-formed portion, a first frame surrounding the mirror-formed portion, first torsion bars connecting the mirror-formed portion to the first frame, second frame surrounding the first frame, and second torsion bars connecting the first frame to the second frame;
a wiring substrate formed with a wiring pattern; and
a plurality of electroconductive spacers for electrically connecting the micro mirror substrate to the wiring pattern and for spacing the micro mirror substrate and the wiring substrate apart from each other;
wherein the second frame includes a plurality of electroconductive islands electrically separated from each other, each of the electroconductive spacers being connected to a respective one of the electroconductive islands.
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Abstract
A micro mirror unit includes a micro mirror substrate, a wiring substrate and an electroconductive spacer disposed between these substrates. The micro mirror substrate includes a moving part, a frame and torsion bars connecting the moving part to the frame. The moving part is provided with a mirror-formed portion. The wiring substrate is formed with a wiring pattern. The electroconductive spacer electrically connects the frame to the wiring pattern, while also providing a space between the micro mirror substrate and the wiring substrate.
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Citations
18 Claims
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1. A micro mirror unit comprising:
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a micro mirror substrate that includes a mirror-formed portion, a first frame surrounding the mirror-formed portion, first torsion bars connecting the mirror-formed portion to the first frame, second frame surrounding the first frame, and second torsion bars connecting the first frame to the second frame;
a wiring substrate formed with a wiring pattern; and
a plurality of electroconductive spacers for electrically connecting the micro mirror substrate to the wiring pattern and for spacing the micro mirror substrate and the wiring substrate apart from each other;
wherein the second frame includes a plurality of electroconductive islands electrically separated from each other, each of the electroconductive spacers being connected to a respective one of the electroconductive islands. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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2. A micro mirror unit comprising:
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a micro mirror substrate including a plurality of mirror-formed portions, a plurality of frames each surrounding a respective one of the mirror-formed portions, first torsion bars connecting each of the mirror-formed portions to a respective one of the first frames, a second frame surrounding each of the first frames, and second torsion bars connecting each of the first frames to the second frame;
a wiring substrate formed with a wiring pattern; and
a plurality of electroconductive spacers for electrically connecting the micro mirror substrate to the wiring pattern and for spacing the micro mirror substrate and the wiring substrate apart from each other, wherein the second frame includes, for each of the first frames, a plurality of electroconductive islands electrically separated from each other, each of the electroconductive spacers being connected to a respective one of the electroconductive islands.
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18. A micro mirror unit comprising:
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a micro mirror substrate mounted on a wiring substrate via a plurality of electrically separated electroconductive spacers, the micro mirror substrate including a mirror portion surrounded sequentially by first and second frames, the mirror portion and first and second frames being rotatably connected by first and second torsion bars, respectively, wherein the second frame has a plurality of electroconductive islands each electrically connected to a respective one of the electroconductive spacers.
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Specification