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Figure 5
Imaging optics for EUVL. (a) Two-aspherical-mirror optics designed by NTT. (b) Three-aspherical-mirror optics designed by HIT. M: mask; W: wafer; m1, m2, m3: aspherical mirrors; PM: plane mirror. |
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Figure 5
Imaging optics for EUVL. (a) Two-aspherical-mirror optics designed by NTT. (b) Three-aspherical-mirror optics designed by HIT. M: mask; W: wafer; m1, m2, m3: aspherical mirrors; PM: plane mirror. |