Reflective loop system producing incoherent radiation
First Claim
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1. A system, comprising:
- a source of radiation that produces a coherent or partially coherent beam; and
a reflective loop system comprising a reflective device comprising at least one opening,wherein the reflective device is configured to reflect the coherent or partially coherent beam through one or more loops, each of the loops comprising four reflections, to form a more incoherent beam,wherein the beam enters or exits the reflective loop system through the at least one opening, andwherein the reflective loop system includes a field plane and a pupil plane.
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Abstract
A system and method are used to form incoherent beams from a coherent beam. A system comprises a source of radiation and a reflective loop system. The source of radiation produces a coherent or partially coherent beam. The reflective loop system received the partially coherent beam and reflects the partially coherent beam through a loop, or alternatively through non-overlapping loops, to form an incoherent beam.
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Citations
29 Claims
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1. A system, comprising:
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a source of radiation that produces a coherent or partially coherent beam; and a reflective loop system comprising a reflective device comprising at least one opening, wherein the reflective device is configured to reflect the coherent or partially coherent beam through one or more loops, each of the loops comprising four reflections, to form a more incoherent beam, wherein the beam enters or exits the reflective loop system through the at least one opening, and wherein the reflective loop system includes a field plane and a pupil plane. - 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 lithography system, comprising:
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an illumination system that generates an illumination beam of radiation, comprising, a source of radiation, and a reflective loop system comprising a reflective device comprising at least one opening, wherein the reflective device is configured to reflect a partially coherent beam through one or more loops, each of the loops comprising four reflections, to form a more incoherent beam, wherein the beam enters or exits the reflective loop system through the at least one opening; a patterning device that patterns the illumination beam of radiation; and a projection system that projects the patterned beam onto a target portion of a substrate. - View Dependent Claims (19, 20)
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21. A device manufacturing method, comprising:
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using a reflective loop system comprising a reflective device comprising at least one opening, wherein the reflective device is configured to reflect a coherent or partially coherent beam through one or more loops to form an incoherent beam, each of the loops comprising four reflections, wherein the beam enters or exits the reflective loop system through the at least one opening; forming an illumination beam from the incoherent beam; patterning the illumination beam; and projecting the patterned illumination beam onto a target portion of a substrate. - View Dependent Claims (22, 23)
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24. A laser that outputs an incoherent output beam, comprising:
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a source of radiation that produces a coherent or partially coherent beam; and a reflective loop system comprising a reflective device comprising at least one opening, wherein the reflective device is configured to receive the coherent or partially coherent beam and reflect the partially coherent beam through one or more loops, each of the loops comprising four reflections, to form the incoherent output beam, wherein the beam enters or exits the reflective loop system through the at least one opening, and wherein the reflective loop system includes a field plane and a pupil plane. - View Dependent Claims (25, 26)
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27. An illuminator that outputs an incoherent illumination beam, comprising:
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a source of radiation that produces a coherent or partially coherent beam; and a reflective loop system comprising a reflective device comprising at least one opening, wherein the reflective device is configured to receive the partially coherent beam and reflect the partially coherent beam through one or more loops, each of the loops comprising four reflections, to form the incoherent illumination beam, wherein the beam enters or exits the reflective loop system through the at least one opening, and wherein the reflective loop system includes a field plane and a pupil plane. - View Dependent Claims (28, 29)
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Specification