MEMS device and interconnects for same
First Claim
Patent Images
1. A microelectromechanical systems device, comprising:
- a lower electrode;
a movable conductive layer;
a cavity between the lower electrode and the movable conductive layer;
an electrical interconnect layer electrically connected to at least one of the lower electrode and the movable conductive layer, wherein the electrical interconnect and the movable conductive layer are formed of a same material and wherein the electrical interconnect layer is formed directly over a thin film that is etchable by fluorine-based etchants.
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Abstract
A microelectromechanical systems device having an electrical interconnect connected to at least one of an electrode and a movable layer within the device. At least a portion of the electrical interconnect is formed from the same material as a movable layer of the device. A thin film, particularly formed of molybdenum, is provided underneath the electrical interconnect. The movable layer preferably comprises aluminum.
295 Citations
38 Claims
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1. A microelectromechanical systems device, comprising:
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a lower electrode; a movable conductive layer; a cavity between the lower electrode and the movable conductive layer; an electrical interconnect layer electrically connected to at least one of the lower electrode and the movable conductive layer, wherein the electrical interconnect and the movable conductive layer are formed of a same material and wherein the electrical interconnect layer is formed directly over a thin film that is etchable by fluorine-based etchants. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of forming a microelectromechanical systems device, comprising:
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providing an electrode in an array region; depositing a sacrificial layer over the electrode in the array region; depositing a thin film over the sacrificial layer and in an interconnect region; forming a movable layer over the thin film; and forming an electrical interconnect layer over the thin film in the interconnect region, wherein the electrical interconnect layer comprises a same material as the movable layer. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A microelectromechanical systems device, comprising:
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a first means for conducting; a second means for conducting, wherein the second means for conducting comprises a movable layer; a cavity between the first means for conducting and the second means for conducting; an interconnect means for electrically communicating between circuitry outside the device and at least one of the first and second means for conducting, wherein the interconnect means and the second means for conducting are formed of a same material and wherein the interconnect means is formed directly over a thin film that is etchable by fluorine-based etchants. - View Dependent Claims (35, 36, 37, 38)
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Specification