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    • 2. 发明申请
    • A METHOD OF SETTING UP A PROJECTION EXPOSURE SYSTEM, A PROJECTION EXPOSURE METHOD AND A PROJECTION EXPOSURE SYSTEM FOR MICROLITHOGRAPHY
    • WO2022156875A1
    • 2022-07-28
    • PCT/EP2021/050977
    • 2021-01-19
    • CARL ZEISS SMT GMBHASML NETHERLANDS B.V.
    • SCHNEIDER, EvaGRUNER, ToralfTUDOROVSKIY, Timur
    • G03F7/20
    • In a method of setting up a projection exposure system for exposing a radiation sensitive substrate with at least one image of a pattern, the projection exposure system comprises an illumination system (ILL) configured to generate illumination radiation (ILR) directed onto the pattern in an illumination field; a projection lens (PO) comprising a plurality of optical elements configured to project a part of the pattern lying in the illumination field onto an image field at the substrate with projection radiation; a measuring system (MS) capable of measuring at least one property of the projection radiation representing an aberration level at a plurality of spaced apart measuring points distributed in the image field; and an operating control system comprising at least one manipulator operatively connected to an optical element of the projection exposure system to modify imaging properties of the projection exposure system based on measurement results generated by the measuring system. The method comprises the step of determining, in a measuring point distribution calculation (MPDC), a measuring point distribution defining a number and positions of measuring points to be used in a measurement, wherein the measuring point distribution calculation (MPDC) is performed under boundary conditions representing at least: (i) manipulation capacities of the operating control system; (ii) measuring capacities of the measuring system; and (iii) predefined use case scenarios defining a set of representative use cases, wherein each use case corresponds to a specific aberration pattern generated by the projection exposure system under a predefined set of use conditions.