Alignment device and lithographic apparatus provided with such a

Optics: measuring and testing – By alignment in lateral direction – With registration indicia

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G01B 1100

Patent

active

059176040

ABSTRACT:
A device is described for aligning a first object provided with a first alignment mark (P) with respect to a second object provided with a second alignment mark (M), which marks have a periodical structure and are imaged onto each other. By selecting beam portions from the radiation from the first alignment mark (P) with the aid of an order diaphragm (55'), which beam portions are deflected through larger angles, the sensitivity of the device to errors can be decreased. Such a device may be used to great advantage in a lithographic apparatus.

REFERENCES:
patent: 4251160 (1981-02-01), Bouwhuis et al.
patent: 4778275 (1988-10-01), Van Den Brink et al.
patent: 5100237 (1992-03-01), Wittekoek et al.

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

Alignment device and lithographic apparatus provided with such a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Alignment device and lithographic apparatus provided with such a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alignment device and lithographic apparatus provided with such a will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1380551

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