MEMS-based structure for pico speaker
First Claim
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1. A microelectromechanical system (MEMS) device, the device comprising:
- a first movable element that is positioned in a first plane, formed from a first layer of a semiconductor substrate, and configured to oscillate along a first directional path substantially orthogonal to the first plane; and
a second movable element that is formed from a second layer of the semiconductor substrate that is a different layer than the first layer of the semiconductor substrate, wherein the second movable element is configured to oscillate along a second directional path that is substantially parallel to the first directional path.
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Abstract
Techniques described herein generally include methods and systems related to a MEMS-based audio speaker system that includes a first movable element, formed from a first layer of a semiconductor substrate, and a second movable element, formed from a second layer of the semiconductor substrate that is a different layer than the first layer of the semiconductor substrate. The first movable element may be configured to oscillate along a first directional path substantially orthogonal to the first plane.
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Citations
28 Claims
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1. A microelectromechanical system (MEMS) device, the device comprising:
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a first movable element that is positioned in a first plane, formed from a first layer of a semiconductor substrate, and configured to oscillate along a first directional path substantially orthogonal to the first plane; and a second movable element that is formed from a second layer of the semiconductor substrate that is a different layer than the first layer of the semiconductor substrate, wherein the second movable element is configured to oscillate along a second directional path that is substantially parallel to the first directional path. - 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 microelectromechanical system (MEMS) device, the device comprising:
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an acoustic pipe configured to conduct an ultrasonic acoustic signal along a first directional path; a first movable element that is positioned at a first end of the acoustic pipe, formed from a first layer of a semiconductor substrate, and configured to direct the ultrasonic signal into the acoustic pipe; a blind element that is formed from a second layer of the semiconductor substrate, includes one or more apertures, and is positioned at a second end of the acoustic pipe, wherein the second layer is a different layer than the first layer and the second end is opposite to the first end; and a second movable element that is disposed outside the acoustic pipe and is formed from a third layer of the semiconductor substrate, wherein the third layer of the semiconductor substrate is a different layer than the first layer or the second layer, wherein the second movable element is configured to oscillate along a second directional path that is substantially parallel to the first directional path. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. A method to operate a microelectromechanical system (MEMS) device, the method comprising:
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oscillating a first movable element along a first directional path to generate an ultrasonic acoustic signal; conducting the ultrasonic acoustic signal along the first directional path via an acoustic pipe to a second movable element; and oscillating the second movable element along a second directional path that is substantially orthogonal or substantially parallel to the first directional path to modulate the ultrasonic acoustic signal and generate an audio signal. - View Dependent Claims (28)
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Specification