Compensation techniques for fluid and magnetic bearings
First Claim
1. A system, comprising:
- one or more support devices having one or more openings,a guide passing through respective ones of the one or more openings;
fluid or magnetic bearings configured to guide the one or more support devices along the guide; and
a compensation system coupled to respective ones of the one or more support devices adjacent to each of the fluid or magnetic bearings, the compensation system configured to generate a rotational motion that compensates for tilt in the one or more support devices or to compensate for non-straight areas of the guide or shifting of the one or more support devices, wherein the compensation system comprises a sensor configured to determine at least one of position or tilting of the respective support device based on a measurement using a datum surface of the guide.
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Accused Products
Abstract
A system is configured to compensate for guide flatness errors and/or shifting of a support. The system can include one or more support devices, fluid or magnetic bearings to guide the one or more support devices along a guide, and a compensation system. The compensation system is coupled to respective ones of the one or more support devices adjacent to each of the fluid or magnetic bearings. The compensation system is configured to generate a rotational motion that compensates for tilting in the support devices compensate for any non-straight areas of the guide or shifting (e.g., thermal shifting) of the support devices, which is done through moving of the support devices with respect to the guides during movement of the support devices along the guide.
26 Citations
30 Claims
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1. A system, comprising:
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one or more support devices having one or more openings, a guide passing through respective ones of the one or more openings; fluid or magnetic bearings configured to guide the one or more support devices along the guide; and a compensation system coupled to respective ones of the one or more support devices adjacent to each of the fluid or magnetic bearings, the compensation system configured to generate a rotational motion that compensates for tilt in the one or more support devices or to compensate for non-straight areas of the guide or shifting of the one or more support devices, wherein the compensation system comprises a sensor configured to determine at least one of position or tilting of the respective support device based on a measurement using a datum surface of the guide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 25, 26, 27, 28, 29, 30)
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23. An illumination system of a lithography apparatus, comprising:
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one or more support devices having one or more openings; a guide passing through respective ones of the one or more openings; fluid or magnetic bearings configured to guide the one or more support devices along the guide; and a compensation system coupled to respective ones of the one or more support devices adjacent to each of the fluid or magnetic bearings, the compensation system configured to generate a rotational motion that compensates for tilt in the one or more support devices or to compensate for non-straight areas of the guide or shifting of the one or more support devices, wherein the compensation system comprises a sensor configured to determine at least one of position or tilting of the respective support device based on a measurement using a datum surface of the guide.
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24. A lithography apparatus, comprising:
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an illumination system configured to produce a beam of radiation; a patterning device configured to pattern the beam of radiation; and a projection system configured to project the patterned beam onto a target portion of a substrate, wherein the illumination system comprises; one or more support devices having one or more openings; a guide passing through respective ones of the one or more openings; fluid or magnetic bearings configured to guide the one or more support devices along the guide; and a compensation system coupled to respective ones of the one or more support devices adjacent to each of the fluid or magnetic bearings, the compensation system configured to generate a rotational motion that compensates for a tilt in the one or more support devices or to compensate for non-straight areas of the guide or shifting of the one or more support devices, which is done through moving of the one or more support devices traverse to the guide, during movement of the one or more support devices along the guide.
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Specification