Photocopying – Projection printing and copying cameras – Step and repeat
Patent
1994-09-27
1997-02-11
Metjahic, Safet
Photocopying
Projection printing and copying cameras
Step and repeat
355 72, G03B 2754
Patent
active
056026196
ABSTRACT:
A mechanical scanner design suitable for use in a step and scan lithography system with arbitrary image magnification includes a projection optical system (20) and a relatively rotatable platform (40). The optical system has the property that a point within a predetermined object field in a first plane is imaged with suitable magnification at a corresponding point within a corresponding image field in a second plane, parallel to the first plane. The object and image fields are displaced from each other. A light source (22) illuminates an aperture such as a slit which is imaged in the object plane, whereupon a slit image is formed in the image plane. The reticle and wafer are mounted to the platform at respective locations in the object and image planes. The axis (42) of relative rotation is perpendicular to the conjugate planes, and located relative to the optical system such that the object field and image field slit images are at respective distances from the rotation axis that are in the ratio equal to the magnification.
REFERENCES:
patent: 3139013 (1964-06-01), Graves
patent: 3592114 (1971-07-01), Minett
patent: 3610750 (1971-10-01), Lewis et al.
patent: 3722996 (1973-03-01), Fox
patent: 3732009 (1973-05-01), Callum
patent: 3819265 (1974-06-01), Feldman et al.
patent: 4068947 (1978-01-01), Buckley et al.
patent: 4241390 (1980-12-01), Markle et al.
patent: 4336597 (1982-06-01), Okubo et al.
patent: 4425508 (1984-01-01), Lewis, Jr. et al.
patent: 4444531 (1984-04-01), Baker et al.
patent: 4516852 (1985-05-01), Liu et al.
patent: 4539695 (1985-09-01), La Fiandra
patent: 4616908 (1986-10-01), King
patent: 4640619 (1987-02-01), Edmark, III
patent: 4667415 (1987-05-01), Barsky
patent: 4697087 (1987-09-01), Wu
patent: 4818838 (1989-04-01), Young et al.
patent: 4822975 (1989-04-01), Torigoe
patent: 4872358 (1989-10-01), Buis
patent: 4953960 (1990-09-01), Williamson
patent: 5285236 (1994-02-01), Jain
patent: 5309198 (1994-05-01), Nakagawa
Malley D. P.
Metjahic Safet
Nikon Precision Inc.
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