Generation of periodic sawtooth optical intensity by phase-shifting mask

被引:1
|
作者
Ura, Shogo [1 ]
Kintaka, Kenji [2 ]
Awazu, Hideyuki [1 ]
Nishio, Kenzo [1 ]
Awatsuji, Yasuhiro [1 ]
Nishii, Junji [3 ]
机构
[1] Kyoto Inst Technol, Dept Elect, Grad Sch Sci & Technol, Kyoto 6068585, Japan
[2] Natl Inst Adv Ind Sci & Technol, Photon Res Inst, Tsukuba, Ibaraki 3058568, Japan
[3] Natl Inst Adv Ind Sci & Technol, Photon Res Inst, Osaka 5638577, Japan
关键词
D O I
10.1143/APEX.1.022005
中图分类号
O59 [应用物理学];
学科分类号
摘要
A new simple interference exposure method using a phase-shifting mask was discussed on the basis of Fourier synthesis for fabricating blazed gratings. Phase-shifting mask was designed with 244nm exposure-light wavelength to launch multiple diffraction beams so that resultant interference pattern fit to required optical intensity profile. Fine surface-relief pattern on SiO(2) mask for 3-mu m-period sawtooth optical-intensity profile was fabricated by electron-beam direct-writing lithography with 30nm scanning step and relief height of 65nm. Sawtooth-like intensity profile was demonstrated with theoretically predicted interference visibility. (c) 2008 The Japan Society of Applied Physics.
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页数:3
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