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Figure 4
Depth profile of the etched pattern in SiO2. The reaction gas was SF6 (0.05 torr). The exposure dose of the synchrotron radiation irradiation was 1 × 104 mA min. (a) An Al (thickness ∼38 nm) contact mask with 1 × 1 mm2 opening was used. (b) A stainless steel (thickness 0.1 mm) contact mask with 1 × 1 mm2 opening was used.

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SYNCHROTRON
RADIATION
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