Invention Grant
- Patent Title: EUV mirror and optical system comprising EUV mirror
-
Application No.: US15215123Application Date: 2016-07-20
-
Publication No.: US10203435B2Publication Date: 2019-02-12
- Inventor: Thomas Schicketanz , Oliver Dier , Sebastian Strobel , Ralf Winter
- Applicant: Carl Zeiss SMT GmbH
- Applicant Address: DE Oberkochen
- Assignee: CARL ZEISS SMT GMBH
- Current Assignee: CARL ZEISS SMT GMBH
- Current Assignee Address: DE Oberkochen
- Agency: Edell, Shapiro & Finnan, LLC
- Priority: DE102014200932 20140120
- Main IPC: G02B5/08
- IPC: G02B5/08 ; G21K1/06

Abstract:
An EUV mirror has a multilayer arrangement applied on a substrate. The multilayer arrangement includes a first layer group having ten or more first layer pairs. Each first layer pair has a first layer composed of a high refractive index first layer material having a first layer thickness, has a second layer composed of a low refractive index second layer material having a second layer thickness and has a period thickness corresponding to the sum of the layer thicknesses of all the layers of a first layer pair. The layer thicknesses of one of the layer materials are defined, depending on the period number, by a simply monotonic first layer thickness profile function, e.g. by a linear, quadratic or exponential layer thickness profile function. The layer thicknesses of the other of the layer materials vary, depending on the period number, in accordance with a second layer thickness profile function.
Public/Granted literature
- US20160327702A1 EUV MIRROR AND OPTICAL SYSTEM COMPRISING EUV MIRROR Public/Granted day:2016-11-10
Information query