Mask-holding apparatus for a light exposure apparatus and...

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

Reexamination Certificate

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C355S053000, C430S005000

Reexamination Certificate

active

06888621

ABSTRACT:
An exposure apparatus for exposing a substrate with an image of a pattern formed on a mask, including an illumination system or irradiation for illuminating or irradiating the mask with exposure light. A projection optical system is included for projecting, onto the substrate, an image of the pattern illuminated by the exposure light. The mask is securely supported on a movable mask stage. In one example, a mask holder is provided for supporting the mask from below. A pressing member is also included for applying, from above, a prescribed force to the mask, outside of the points supported by the mask holder.

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patent: 6172738 (2001-01-01), Korenaga et al.

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