LENS FOR STEP-BY-STEP MULTIPLICATION UNIT MADE FROM QUARTZ GLASS Russian patent published in 2001 - IPC

Abstract RU 2175647 C2

FIELD: printing industry. SUBSTANCE: invention relates to multiplication unit capable of being used in photolithography at wavelengths 193 and 248 nm. Lens resistant to laser effects (pressing or compaction) is made either by flame hydrolysis technique or according to sol-gel method using organosilicon compounds. When irradiated by high-intensity dose of excimer emission (I2N = 6,3•1010), lens shows phase front distortion less than 0.095 ppm. EFFECT: improved photolithographic process reliability. 5 cl, 1 dwg

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RU 2 175 647 C2

Authors

Borrelli Nikolas F.

S'Juard Tomas P.

Smit Charlin

Dates

2001-11-10Published

1997-08-27Filed