Metrology target indentification, design and verification
First Claim
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1. A metrology tool comprising:
- at least one active vibration isolation device; and
,at least one passive vibration isolation device, wherein at least one of the at least one active vibration isolation devices or at least one passive vibration isolation devices, is selected from a group consisting of;
A) a constrained layer damper and at least one particle or liquid impact damper within a supporting structure of the metrology tool;
B) at least one noise cancellation transducer arranged to reduce mechanical frequencies by cancelling noise;
C) at least one noise cancellation transducer arranged to detect a vibration wave and generate an opposite wave having reversed polarity;
D) at least one acoustic skin with at least one noise cancellation transducer configured to isolate the tool from acoustic vibrations in an environment of the tool;
E) at least one acoustic transducer applied to at least one of a tool base table and optics'"'"' supporting structures; and
,F) combinations thereof.
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Abstract
Metrology tools are provided, which comprise both active and passive vibration isolation devices, passive or active isolation systems such as constrained layer dampers, particle impact dampers or liquid impact dampers, and/or noise cancellation transducers, combined in different supporting structures of the metrology tool to dampen and reduce vibrations at a wide range of frequencies and intensities, and to which frequency range spectral analysis and optimization may be applied to determine specific tool configurations according to the provided principles.
15 Citations
16 Claims
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1. A metrology tool comprising:
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at least one active vibration isolation device; and
,at least one passive vibration isolation device, wherein at least one of the at least one active vibration isolation devices or at least one passive vibration isolation devices, is selected from a group consisting of; A) a constrained layer damper and at least one particle or liquid impact damper within a supporting structure of the metrology tool; B) at least one noise cancellation transducer arranged to reduce mechanical frequencies by cancelling noise; C) at least one noise cancellation transducer arranged to detect a vibration wave and generate an opposite wave having reversed polarity; D) at least one acoustic skin with at least one noise cancellation transducer configured to isolate the tool from acoustic vibrations in an environment of the tool; E) at least one acoustic transducer applied to at least one of a tool base table and optics'"'"' supporting structures; and
,F) combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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combining at least one active vibration isolation device and at least one passive vibration isolation device into a metrology tool, and, performing at least one step selected from a group consisting of; A) introducing constrained layer dampers and at least one particle or liquid impact damper into a supporting structure of the metrology tool; B) reducing mechanical frequencies by cancelling noise using at least one noise cancellation transducer; C) cancelling noise by detecting a vibration wave and generating an opposite wave having reversed polarity; D) combining at least one acoustic skin with at least one noise cancellation transducer configured to isolate the tool from acoustic vibrations in an environment of the tool; E) applying acoustic transducers to at least one of a tool base table and optics'"'"' supporting structures; and
,F) combinations thereof. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification