FACET MIRROR FOR USE IN A PROJECTION EXPOSURE APPARATUS FOR MICROLITHOGRAPHY
    5.
    发明公开
    FACET MIRROR FOR USE IN A PROJECTION EXPOSURE APPARATUS FOR MICROLITHOGRAPHY 审中-公开
    面镜用在投射曝光设备的微型光刻

    公开(公告)号:EP2243047A1

    公开(公告)日:2010-10-27

    申请号:EP09709960.0

    申请日:2009-02-06

    申请人: Carl Zeiss SMT AG

    IPC分类号: G02B5/09 G03F7/20

    摘要: A facet mirror is to be used as a bundle-guiding optical component in a projection exposure apparatus for microlithography. The facet mirror has a plurality of separate mirrors. For individual deflection of incident illumination light, the separate mirrors are in each case connected to an actuator in such a way that they are separately tiltable about at least one tilt axis. A control device, which is connected to the actuators, is configured in such a way that a given grouping of the separate mirrors can be grouped into separate mirror groups that include in each case at least two separate mirrors. The result is a facet mirror which, when installed in the projection exposure apparatus, increases the variability for setting various illumination geometries of an object field to be illuminated by the projection exposure apparatus. Various embodiments of separate mirrors for forming the facet mirrors are described.

    HIGH-PRECISION OPTICAL SURFACE PREPARED BY SAGGING FROM A MASTERPIECE
    8.
    发明公开
    HIGH-PRECISION OPTICAL SURFACE PREPARED BY SAGGING FROM A MASTERPIECE 审中-公开
    BY拐点一个MASTER PIECE WON OPTICAL面加工精度高的

    公开(公告)号:EP1812935A2

    公开(公告)日:2007-08-01

    申请号:EP05808702.4

    申请日:2005-11-08

    申请人: Carl Zeiss SMT AG

    IPC分类号: G21K1/06 B24B13/00 G03F7/20

    摘要: A method of making a high-precision optical surface which may be used either as a Wolter-type segment in an X-ray mirror system or in a collector of a EUVL system or as a spherical, aspherical, or free form normal or grazing incidence mirror in an EUVL system is prepared by sagging a thin flat glass sheet onto a masterpiece, in particular a mandrel, made from a temperature-resistant material, such as an alumina based ceramic or a keatite glass ceramic. The glass sheet is polished to the desired surface roughness (14), is posi­tioned to an upper surface of the masterpiece (16), and is heated (18) to effect sagging onto the upper surface of the masterpiece for generating a shaped body. Thereafter, the shaped body is cooled and removed from the masterpiece, is mounted within a holder (22), is inspected for deviations from the specification (24) preferably using interferometric measurements, and is corrected for defects (26), preferably using ion beam figuring.