Linear motor and stage apparatus, exposure apparatus, and device manufacturing method using the same
First Claim
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1. A linear motor comprising:
- a first magnet group having a plurality of first magnets arrayed such that polarization directions thereof are periodically opposite, and a plurality of second magnets arrayed such that polarization directions thereof are periodically opposite and intersect those of the first magnets;
a second magnet group having a plurality of third magnets arrayed such that polarization directions thereof are periodically opposite, and a plurality of fourth magnets arrayed such that polarization directions thereof are periodically opposite and intersect those of said third magnets;
a support member which supports the first magnet group on one side and the second magnet group on the other side;
first and second electromagnetic coils disposed on both sides of the support member, wherein the first electromagnetic coil is disposed to oppose the first magnet group to generate a Lorentz force in cooperation with the first magnet group, and the second electromagnetic coil is disposed to oppose the second magnet group to generate a Lorentz force in cooperation with the second magnet group; and
first and second yokes disposed on both sides of the support member, wherein the first yoke is integrated with the first electromagnetic coil and the second yoke is integrated with the second electromagnetic coil.
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Abstract
A linear motor includes a magnet array having a plurality of first magnets arrayed such that polarization directions thereof are periodically opposite, and a plurality of second magnets arrayed such that polarization directions thereof are periodically opposite and intersect those of the first magnets. The linear motor further includes an electromagnetic coil disposed to oppose the magnet array to generate a Lorentz force in cooperation with the magnet array and a yoke integrated with the coil at a first side opposite to a second side of the coil disposed opposite to the magnet array.
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Citations
11 Claims
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1. A linear motor comprising:
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a first magnet group having a plurality of first magnets arrayed such that polarization directions thereof are periodically opposite, and a plurality of second magnets arrayed such that polarization directions thereof are periodically opposite and intersect those of the first magnets;
a second magnet group having a plurality of third magnets arrayed such that polarization directions thereof are periodically opposite, and a plurality of fourth magnets arrayed such that polarization directions thereof are periodically opposite and intersect those of said third magnets;
a support member which supports the first magnet group on one side and the second magnet group on the other side;
first and second electromagnetic coils disposed on both sides of the support member, wherein the first electromagnetic coil is disposed to oppose the first magnet group to generate a Lorentz force in cooperation with the first magnet group, and the second electromagnetic coil is disposed to oppose the second magnet group to generate a Lorentz force in cooperation with the second magnet group; and
first and second yokes disposed on both sides of the support member, wherein the first yoke is integrated with the first electromagnetic coil and the second yoke is integrated with the second electromagnetic coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A stage apparatus comprising:
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a stage;
a linear motor which drives the stage;
one of a motor movable element and a stator having (i) a first magnet group having a plurality of first magnets arrayed such that polarization directions thereof are periodically opposite, and a plurality of second magnets arrayed such that polarization directions thereof are periodically opposite and intersect those of the first magnets, and (ii) a second magnet group having a plurality of third magnets arrayed such that polarization directions thereof are periodically opposite, and a plurality of fourth magnets arrayed such that the polarization directions thereof are periodically opposite and intersect those of said third magnets, and (iii) a support member which supports the first magnet group on one side and the second magnet group on the other side; and
the other of the motor movable element and the stator having (i) first and second electromagnetic coils disposed on both sides of the support member, wherein the first electromagnetic coil is disposed to oppose the first magnet group to generate a Lorentz force in cooperation with the first magnet group, and the second electromagnetic coil is disposed to oppose the second magnet group to generate a Lorentz force in cooperation with the second magnet group, and (ii) first and second yokes disposed on both sides of the support member, wherein the first yoke is integrated with the first electromagnetic coil and the second yoke is integrated with the second electromagnetic coil.
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10. An exposure apparatus for exposing a pattern of a master to a substrate, said apparatus comprising:
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a stage which moves at least one of the master and the substrate;
a linear motor which drives the stage;
one of a motor movable element and a stator having (i) a first magnet group having a plurality of first magnets arrayed such that polarization directions thereof are periodically opposite, and a plurality of second magnets arrayed such that polarization directions thereof are periodically opposite and intersect those of said first magnets, (ii) a second magnet group having a plurality of third magnets arrayed such that polarization directions thereof are periodically opposite, and a plurality of fourth magnets arrayed such that polarization directions thereof are periodically opposite and intersect those of said third magnets, and (iii) a support member which supports the first magnet group on one side and the second magnet group on the other side; and
the other of the motor movable element and the stator having (i) first and second electromagnetic coils disposed on both sides of the support member, wherein the first electromagnetic coil is disposed to oppose the first magnet group to generate a Lorentz force in cooperation with the first magnet group, and the second electromagnetic coil is disposed to oppose the second magnet group to generate a Lorentz force in cooperation with the second magnet group; and
(ii) first and second yokes disposed on both sides of the support member, wherein the first yoke is integrated with the first electromagnetic coil and the second yoke is integrated with the second electromagnetic coil. - View Dependent Claims (11)
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Specification