发明名称 |
PROJECTION OPTICAL SYSTEM, PRODUCTION METHOD FOR PROJECTION OPTICAL SYSTEM, EXPOSURE SYSTEM AND EXPOSURE METHOD |
摘要 |
<p>A projection optical system provided with at least one of optical members made of a calcium fluoride single crystal, wherein each of the optical members satisfies at least any one of the following conditions of (i) to (iii): (i) an RMS value of a spatial frequency component having a number of periods fPD in partial diameter in a range from 10 periods to 50 periods inclusive out of fluctuation of a transmission wavefront relative to light having a wavelength of 633 nm is equal to or below 0.35 nm/cm; (ii) an RMS value of a spatial frequency component having a number of periods fPD in partial diameter in a range from 10 periods to 100 periods inclusive out of fluctuation of a transmission wavefront relative to light having a wavelength of 633 nm is equal to or below 0.45 nm/cm; and (iii) an RMS value of a spatial frequency component having a number of periods fPD in partial diameter in a range from 10 periods to 150 periods inclusive out of fluctuation of a transmission wavefront relative to light having a wavelength of 633 nm is equal to or below 0.50 nm/cm.</p> |
申请公布号 |
KR20070043994(A) |
申请公布日期 |
2007.04.26 |
申请号 |
KR20077002526 |
申请日期 |
2007.01.31 |
申请人 |
NIKON CORPORATION |
发明人 |
KUDO YUJI;IWASAKI TAKESHI |
分类号 |
G02B13/24;G03F7/20;H01L21/027 |
主分类号 |
G02B13/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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