ILLUMINATION OPTICAL UNIT FOR EUV MICROLITHOGRAPHY
PROBLEM TO BE SOLVED: To provide an illumination optical unit and a projection exposure apparatus including the same. SOLUTION: The illumination optical unit includes a first optical element having a plurality of first reflective facet elements and a second optical element having a plurality of seco...
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| creator | ENDRES MARTIN DOERN SEBASTIAN BIELING STIG KIRCH MARC |
| description | PROBLEM TO BE SOLVED: To provide an illumination optical unit and a projection exposure apparatus including the same. SOLUTION: The illumination optical unit includes a first optical element having a plurality of first reflective facet elements and a second optical element having a plurality of second reflective facet elements. Each first reflective facet element from the plurality of the first reflective facet elements is embodied such that it has a respective maximum number of different positions which defines a set, associated with the first facet element, consisting of second facet elements in that the set consists of all second facet elements onto which the first facet element directs radiation in its different positions during the operation of the illumination optical unit. The plurality of second facet elements forms a plurality of mutually disjoint groups, wherein each of the groups and each of the sets contain at least two second facet elements, and there are no two second facet elements of a set which belong to the same group. This construction makes it possible to provide an illumination optical unit which can be used to provide a large number of different angle-dependent intensity distributions at the location of an object field. COPYRIGHT: (C)2011,JPO&INPIT |
| format | Patent |
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SOLUTION: The illumination optical unit includes a first optical element having a plurality of first reflective facet elements and a second optical element having a plurality of second reflective facet elements. Each first reflective facet element from the plurality of the first reflective facet elements is embodied such that it has a respective maximum number of different positions which defines a set, associated with the first facet element, consisting of second facet elements in that the set consists of all second facet elements onto which the first facet element directs radiation in its different positions during the operation of the illumination optical unit. The plurality of second facet elements forms a plurality of mutually disjoint groups, wherein each of the groups and each of the sets contain at least two second facet elements, and there are no two second facet elements of a set which belong to the same group. This construction makes it possible to provide an illumination optical unit which can be used to provide a large number of different angle-dependent intensity distributions at the location of an object field. 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This construction makes it possible to provide an illumination optical unit which can be used to provide a large number of different angle-dependent intensity distributions at the location of an object field. 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SOLUTION: The illumination optical unit includes a first optical element having a plurality of first reflective facet elements and a second optical element having a plurality of second reflective facet elements. Each first reflective facet element from the plurality of the first reflective facet elements is embodied such that it has a respective maximum number of different positions which defines a set, associated with the first facet element, consisting of second facet elements in that the set consists of all second facet elements onto which the first facet element directs radiation in its different positions during the operation of the illumination optical unit. The plurality of second facet elements forms a plurality of mutually disjoint groups, wherein each of the groups and each of the sets contain at least two second facet elements, and there are no two second facet elements of a set which belong to the same group. This construction makes it possible to provide an illumination optical unit which can be used to provide a large number of different angle-dependent intensity distributions at the location of an object field. COPYRIGHT: (C)2011,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BASIC ELECTRIC ELEMENTS ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS SEMICONDUCTOR DEVICES |
| title | ILLUMINATION OPTICAL UNIT FOR EUV MICROLITHOGRAPHY |
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