Lithographic apparatus and device manufacturing method
First Claim
Patent Images
1. A lithographic apparatus, comprising:
- an illumination system that supplies a beam of radiation;
a patterning array of individually controllable elements having an active surface, the active surface being configured to pattern the beam;
a mounting plate on which said patterning array is mounted;
an adjustment structure that elevates or deforms at least a portion of the active surface of said patterning array, wherein the adjustment structure comprises an array of vertically extensible adjusters in contact with a side opposite of the active surface of said patterning array; and
a projection system that projects the patterned beam onto a target portion of a substrate.
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Abstract
One or more patterning arrays are mounted to a mounting plate via height adjustment structures that enable the flatness of the active surfaces of the patterning arrays to be controlled. The height adjustment structures may comprise an array of piezoelectric actuators or screws. Alternatively, the backside of the patterning means may be polished to optical flatness and bonded by crystal bonding to an optically flat surface of a rigid mounting body.
47 Citations
14 Claims
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1. A lithographic apparatus, comprising:
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an illumination system that supplies a beam of radiation; a patterning array of individually controllable elements having an active surface, the active surface being configured to pattern the beam; a mounting plate on which said patterning array is mounted; an adjustment structure that elevates or deforms at least a portion of the active surface of said patterning array, wherein the adjustment structure comprises an array of vertically extensible adjusters in contact with a side opposite of the active surface of said patterning array; and a projection system that projects the patterned beam onto a target portion of a substrate. - View Dependent Claims (2, 3, 4, 5, 6, 12, 13)
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7. A device manufacturing method, comprising:
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elevating or deforming an active surface of a patterning array of individually controllable elements using an array of vertically extensible adjusters in contact with a side opposite of the active surface of said patterning array; patterning a beam of radiation using the active surface of the patterning array; and projecting the patterned beam onto a target portion of a substrate. - View Dependent Claims (8, 9, 10, 11)
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14. A lithographic apparatus, comprising:
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an illumination system configured to supply a beam of radiation; a patterning array of individually controllable elements having an active surface, the active surface being configured to pattern the beam; a mounting plate on which the patterning array is mounted; an adjustment structure configured to (i) elevate or de-elevate at least a portion of the active surface of the patterning array to a new plane parallel to a plane of the patterning array or (ii) deform at least a portion of the active surface of the patterning array to produce a non-planar surface, wherein the adjustment structure comprises an array of vertically extensible adjusters in contact with a side opposite of the active surface of the patterning array; and a projection system that projects the patterned beam onto a target portion of a substrate.
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Specification