Exposure apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 14, 2000
Grant Date -
N/A
app pub date -
Nov 16, 1998
filing date -
Nov 15, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An exposure apparatus includes a frame member with a first stage having a substrate disposed thereon provided in a lower portion of the frame member. A leveling mechanism is provided for adjusting an orientation of the first stage. The exposure apparatus further includes a second stage positioned over the first stage and fixed to the frame member. A reticle is positioned on the second stage. An exposure area limiting mechanism is provided in the exposure apparatus and positioned over the second stage. The exposure area limiting mechanism defines an opening through which light is capable of passing during exposure for limiting an exposure area of the second stage. The exposure apparatus also includes an illumination system to irradiate light to the exposure area limiting means. The illumination system includes a shutter and an exposure sensor for sensing an amount of light that will exit the illumination system, wherein the shutter is controlled in response to the exposure sensor to control the amount of light exiting the illumination system to the exposure area limiting mechanism. A detecting mechanism for detecting alignment of the first and second stages also is provided in the exposure apparatus.
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