The EUV phase-shifting point diffraction interferometer

被引:0
|
作者
Naulleau, P [1 ]
Goldberg, KA [1 ]
Lee, SH [1 ]
Chang, C [1 ]
Attwood, D [1 ]
Bokor, J [1 ]
机构
[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA
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中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The extreme ultraviolet (EUV) phase-shifting point diffraction interferometer (PS/PDI) was developed and implemented at Lawrence Berkeley National Laboratory to meet the significant measurement challenge of characterizing EUV projection lithography optics. The PS/PDI has been in continuous use and under ongoing development since 1996. Here we describe recent improvements made to the interferometer, and we summarize metrology results from state-of-the-art 10x-reduction EUV projection optics.
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页码:66 / 72
页数:7
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