Exposure apparatus and device fabrication method

Photocopying – Projection printing and copying cameras – Step and repeat

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07889319

ABSTRACT:
The present invention provides an exposure apparatus including a measuring unit which includes an imaging optical system configured to guide light having propagated through a projection optical system to an image sensor, and is configured to measure the overall birefringence of the imaging optical system and the projection optical system, a calibration unit which is set on a side of an object plane of the projection optical system in order to measure a birefringence of the imaging optical system, and is configured to reflect the light from the measuring unit back to the measuring unit without using the projection optical system, and a calculation unit configured to isolate, from the result of measuring the overall birefringence, the birefringence of the imaging optical system measured by the measuring unit, thereby calculating the birefringence of the projection optical system.

REFERENCES:
patent: 7106452 (2006-09-01), Ouchi
patent: 7283207 (2007-10-01), Nomura
patent: 7605914 (2009-10-01), Stammler et al.
patent: 2006/0170932 (2006-08-01), Hayashi et al.
patent: 2007/0046922 (2007-03-01), Kadono et al.
patent: 2006-214856 (2006-08-01), None
patent: 2007-059566 (2007-03-01), None
patent: 10-0379521 (2003-04-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Exposure apparatus and device fabrication method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exposure apparatus and device fabrication method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exposure apparatus and device fabrication method will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2623587

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.