Gas bearings for use with vacuum chambers and their...

Photocopying – Projection printing and copying cameras – Detailed holder for original

Reexamination Certificate

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C355S072000, C250S492100

Reexamination Certificate

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06844922

ABSTRACT:
A bearing for use in a vacuum chamber comprises a gas bearing discharging pressurised gas into a gap between two members to maintain a predetermined separation between those members. To avoid the gas forming the gas bearing being an unacceptable leak into the vacuum chamber, a vacuum pump is provided between the vacuum chamber and the gas bearing

REFERENCES:
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patent: 4726689 (1988-02-01), Pollock
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patent: 6445440 (2002-09-01), Bisschops et al.
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patent: WO 9828665 (1998-07-01), None
patent: WO 9840791 (1998-09-01), None
patent: WO 9966221 (1999-12-01), None
Ceglio et al., “Front-end design issues in soft-x-ray projection lithography,”Applied Optics, Optical Society of America, Washington, US, vol. 32, no. 34, Dec. 1, 1993, pp. 7050-7056 (Abstract No. XP000414608 ISSN: 0003-6935).

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