Bulk micromachining process for fabricating an optical MEMS device with integrated optical aperture
First Claim
1. A method for fabricating an optical MEMS device comprising the steps of:
- (a) providing a first substrate having a first side and an opposing second side;
(b) forming an aperture through the first substrate to enable an optical signal to be transmitted through the aperture along a path generally perpendicular to the first and second sides;
(c) forming a movable, actuatable microstructure on a second substrate; and
(d) bonding the second substrate to the first substrate, whereby the first and second substrates are aligned to enable the microstructure to interact with the optical signal upon actuation of the microstructure.
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Accused Products
Abstract
An optical MEMS device is fabricated by forming and aperture through the thickness of a first substrate to enable an optical signal to be transmitted through the aperture. A movable, actuatable microstructure is formed on a second substrate. The second substrate is bonded to the first substrate. The first and second substrates are aligned to enable the microstructure to interact with the optical signal upon actuation of the microstructure. A conductive element is formed on the first substrate to serve as a contact or an interconnect. A channel is formed in the second substrate. An insulating layer can be deposited on the inside surfaces of this channel. When the first and second substrates are bonded together, the conductive element formed on the first substrate is disposed within the channel and is isolated from conductive regions of the resulting optical MEMS device. In another method, an optical MEMS device is fabricated from a substrate that comprises an etch-stop layer interposed between first and second bulk layers. The movable, actuatable microstructure is formed into the first bulk layer, and the aperture is formed through the second bulk layer.
90 Citations
26 Claims
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1. A method for fabricating an optical MEMS device comprising the steps of:
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(a) providing a first substrate having a first side and an opposing second side;
(b) forming an aperture through the first substrate to enable an optical signal to be transmitted through the aperture along a path generally perpendicular to the first and second sides;
(c) forming a movable, actuatable microstructure on a second substrate; and
(d) bonding the second substrate to the first substrate, whereby the first and second substrates are aligned to enable the microstructure to interact with the optical signal upon actuation of the microstructure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24)
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17. A method for fabricating an optical MEMS device comprising the steps of:
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(a) providing a substrate comprising an etch-stop layer interposed between first and second bulk layers;
(b) forming a movable, actuatable microstructure in the first bulk layer;
(c) forming an aperture through the second bulk layer to enable an optical signal to be transmitted through the aperture along a path generally perpendicular to the substrate; and
(d) removing at least a portion of the etch-stop layer sufficient to release the microstructure, thereby enabling the microstructure to interact with the optical signal upon actuation of the microstructure.
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25. A method for fabricating an optical MEMS device comprising the steps of:
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(a) providing a first substrate having a first side and an opposing second side;
(b) forming an aperture through the first substrate to enable an optical signal to be transmitted through the aperture along a path generally perpendicular to the first and second sides;
(c) forming a movable, actuatable microstructure from a second substrate;
(d) forming a conductive component on the second substrate;
(e) forming a gap in the second substrate to electrically isolate the conductive component from the microstructure; and
(f) bonding the second substrate to the first substrate, whereby the first and second substrates are aligned to enable the microstructure to interact with the optical signal upon actuation of the microstructure. - View Dependent Claims (26)
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Specification