Two-step electrode for MEMs micromirrors
First Claim
1. A micro-electro-mechanical device mounted on a substrate comprising:
- a pivoting member having a first inner end and a first outer free end pivotally mounted above the substrate about a first pivoting axis;
a first electrode disposed below the pivoting member for actuation thereof;
wherein the first electrode includes a first portion beneath the first inner end of the pivoting member with a first force per unit area of the pivoting member, and a second portion beneath the first outer free end of the pivoting member with a second force per unit area of the pivoting member, which is less than the first force per unit area.
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Accused Products
Abstract
A “piano”-style MEMs device includes an elongated platform pivotally mounted proximate the middle thereof by a torsional hinge. The middle portion of the platform and the torsional hinge have a combined width less than the width of the rest of the platform, whereby several of these “piano” MEMs devices can be positioned adjacent each other pivotally mounted about the same axis with only a relatively small air gap therebetween. In a preferred embodiment the range of angular motion of a MEMs device'"'"'s platform is increased by reducing the field strength, i.e. the force per unit area, that is sensed at the outer free ends of the platform. Ideally two-step electrodes are provided with a lower step positioned beneath the outer free end of the platform.
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Citations
20 Claims
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1. A micro-electro-mechanical device mounted on a substrate comprising:
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a pivoting member having a first inner end and a first outer free end pivotally mounted above the substrate about a first pivoting axis; a first electrode disposed below the pivoting member for actuation thereof; wherein the first electrode includes a first portion beneath the first inner end of the pivoting member with a first force per unit area of the pivoting member, and a second portion beneath the first outer free end of the pivoting member with a second force per unit area of the pivoting member, which is less than the first force per unit area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A micro-electro-mechanical device mounted on a substrate comprising;
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a plurality of platforms pivotally mounted above the substrate adjacent each other, and pivotable about the same or parallel axes, each platform having an inner end and an outer free end; and at least one electrode disposed beneath each of the platforms, wherein each electrode includes a first portion beneath the inner end of one of the platforms with a first force per unit area of the platform, and a second portion beneath the outer free end of one of the platforms with a second force per unit area of the platform, which is less than the first force per unit area. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification