Displacement device
First Claim
1. A displacement device comprising a first part and a second part, at least one of which can be displaced with respect to the other in at least an X-direction and a Y-direction perpendicular thereto,the part comprising an array of magnets arranged in accordance with a pattern of rows extending parallel to the X-direction and columns extending parallel to the Y-direction, the array of magnets comprising:
- magnets of a first type, having a magnetization direction which extends at right angles to the X- and Y-directions and towards the second part, and magnets of a second type, having a magnetization direction which extends at right angles to the X- and Y-directions and away from the second part, said magnets of a first type and magnets of a second type being alternatively arranged in each row and each column, each of said magnets of the first and second types corresponding to one of the rows and one of the columns, and magnets of a third type arranged between each pair of juxtaposed magnets of the first and the second type in each row and column, each magnet of a third type having a magnetization direction which extends in one of the X- and Y-directions, wherein each of said magnets of the first and second types has a rectangular cross-section in a first plane extending in the X- and Y-directions, and wherein each of said magnets of the third type has a cross-section in the first plane that is different from the cross-section of said magnets of the first and second types.
1 Assignment
0 Petitions
Accused Products
Abstract
A positioning device comprising a first part (1) which is movable relatively to a second part (2) in an X-direction and a Y-direction, said first part (1) comprising a carrier (5) on which a system of magnets (3) is arranged according to a pattern of rows (7) and columns (8) extending parallel to the X-direction and the Y-direction, respectively. The magnets in each row and column are arranged according to a Halbach array, i.e. the magnetic orientation of successive magnets in each row (7) and each column (8) rotates 90° counter-clockwise. The second part (2) comprises an electric coil system (4) with two types of electric coils (C1, C2), one type having an angular offset of +45°, and the other type having an offset of −45° with respect to the X-direction. The magnet configuration causes a very strong magnetic field.
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Citations
71 Claims
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1. A displacement device comprising a first part and a second part, at least one of which can be displaced with respect to the other in at least an X-direction and a Y-direction perpendicular thereto,
the part comprising an array of magnets arranged in accordance with a pattern of rows extending parallel to the X-direction and columns extending parallel to the Y-direction, the array of magnets comprising: -
magnets of a first type, having a magnetization direction which extends at right angles to the X- and Y-directions and towards the second part, and magnets of a second type, having a magnetization direction which extends at right angles to the X- and Y-directions and away from the second part, said magnets of a first type and magnets of a second type being alternatively arranged in each row and each column, each of said magnets of the first and second types corresponding to one of the rows and one of the columns, and magnets of a third type arranged between each pair of juxtaposed magnets of the first and the second type in each row and column, each magnet of a third type having a magnetization direction which extends in one of the X- and Y-directions, wherein each of said magnets of the first and second types has a rectangular cross-section in a first plane extending in the X- and Y-directions, and wherein each of said magnets of the third type has a cross-section in the first plane that is different from the cross-section of said magnets of the first and second types. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A lithographic apparatus comprising:
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a frame;
a mask holder;
a substrate holder; and
a displacement device comprising a first part and a second part, at least one of which can be displaced with respect to the other in at least an X-direction and a Y-direction perpendicular thereto, the first part comprising are array of magnets arranged in accordance with a pattern of rows extending parallel to the X-direction and columns extending parallel to the Y-direction, the array of magnets comprising;
magnets of a first type, having a magnetization direction which extends at right angles to the X- and Y-directions and towards the second part, and magnets of a second type, having a magnetization direction which extends at right angles to the X- and Y-directions and away from the second part, said magnets of a first type and magnets of a second type being alternately arranged in each row and in each column, each of said magnets of the first and second types corresponding to one of the rows and one of the columns, and magnets of a third type arranged between each pair of juxtaposed magnets of the first and the second type in each row and column, each magnet of the third type having a magnetization direction which extends in one of the X- and Y-directions, wherein each of said magnets of the third type has a non-square cross-section in a first plane extending in the X and Y directions, and wherein each of said magnets of the first and second types has a cross-section in the first plane that is different from the cross-section of said magnets of the third type in the plane, and wherein one of the first and second parts of the displacement device is secured relative to the frame, and wherein the other of the first and second parts is configured to move one among the mask holder and the substrate holder relative to the frame. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A displacement device comprising a first part and a second part, at least one of which can be displaced with respect to the other in at least an X-direction and a Y-direction perpendicular thereto,
the first part comprising an array of magnets arranged in accordance with a pattern of rows extending parallel to the X-direction and columns extending parallel to the Y-direction, the array of magnets comprising: -
magnets of a first type, having a magnetization direction which extends at right angles to the X- and Y-directions and tow the second part, and magnets of a second type, having a magnetization direction which extends at right angles to the X- and Y-directions and away from the second part, said magnets of a first type and magnets of a second type being alternately arranged in each row and in each column, each of said magnets of the first and second types corresponding to one of the rows and one of the columns, and magnets of a third type arranged between each pair of juxtaposed magnets of the first and the second type in each row and column, each magnet of the third type having a magnetization direction which extends in one of he X- and Y-directions, wherein each of said magnets of the third type has a non-square cross-section in a first plane extending in the X and Y directions, and wherein each of said magnets of the first and second types has a cross-section in the first plane that is different from the cross-section of said magnets of the third type in the plane. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. A lithographic apparatus comprising:
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a frame;
a mask holder;
a substrate holder; and
a displacement device comprising a first part and a second part, at least one of which can be displaced with respect to the other in at least an X-direction and a Y-direction perpendicular thereto, the first part comprising an array of magnets arranged in accordance with a pattern of rows extending parallel to the X-direction and columns extending parallel to the Y-direction, the array of magnets comprising;
magnets of a first type, having a magnetization direction which extends at right angles to the X- and Y-directions and towards the second part, and magnets of a second type, having a magnetization direction which extends at right angles to the X- and Y-directions and away from the second part, said magnets of a first type and magnets of a second type being alternately arranged in each row and in each column, each of said magnets of the first and second types corresponding to one of the rows and one of the columns, and magnets of a third type arranged between each pair of juxtaposed magnets of the first and the second type in each row and column, each magnet of the third type having a magnetization direction which extends in one of the X- and Y-directions, wherein each of said magnets of the third type has a non-square cross-section in a first plane extending in the X and Y directions, and wherein each of said magnets of the first and second types has a cross-section in the first plane that is different from the cross-section of said magnets of the third type in the plane, and wherein one of the first and second parts of the displacement device is secured relative to the frame, and wherein the other of the first and second parts is configured to move one among the mask holder and the substrate holder relative to the frame. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
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Specification