Invention Grant
- Patent Title: Method for producing a multilayer coating, optical element and optical arrangement
- Patent Title (中): 制造多层涂层,光学元件和光学布置的方法
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Application No.: US12965280Application Date: 2010-12-10
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Publication No.: US08457281B2Publication Date: 2013-06-04
- Inventor: Hartmut Enkisch , Stephan Muellender , Martin Endres
- Applicant: Hartmut Enkisch , Stephan Muellender , Martin Endres
- Applicant Address: DE Oberkochen
- Assignee: Carl Zeiss SMT GmbH
- Current Assignee: Carl Zeiss SMT GmbH
- Current Assignee Address: DE Oberkochen
- Agency: Sughrue Mion, PLLC
- Priority: DE102008002403 20080612
- Main IPC: G21K1/06
- IPC: G21K1/06

Abstract:
A method for producing a multilayer coating (17) for reflecting radiation in the soft X-ray or EUV wavelength range on an optical element (8, 9) operated at an operating temperature (TOP) of 30° C. or more, including: determining an optical design for the multilayer coating (17) which defines an optical desired layer thickness (nOP dOP) of the layers (17.1, 17.2) of the multilayer coating (17) at the operating temperature (TOP), and applying the layers (17.1, 17.2) of the multilayer coating (17) with an optical actual layer thickness (nB dB) chosen such that a layer thickness change(nOP dOP−nB dB) caused by thermal expansion of the layers (17.1, 17.2) between the coating temperature (TB) and the operating temperature (TOP) is compensated for. Also provided are an associated optical element (8, 9) and a projection exposure apparatus having at least one such optical element (8, 9).
Public/Granted literature
- US20110222144A1 METHOD FOR PRODUCING A MULTILAYER COATING, OPTICAL ELEMENT AND OPTICAL ARRANGEMENT Public/Granted day:2011-09-15
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