Apparatus for manufacturing disc medium

Details Apparatus for manufacturing disc medium Apparatus for manufacturing disc medium

1992-12-18

1994-02-22

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Step and repeat

355 50, G03B 2742

Patent

active

052892310

ABSTRACT:
This specification discloses a method of and an apparatus for manufacturing a disc medium which utilize the projection exposure technique of a stopper for lithography, rotate a circular photosensitive substrate which provides the disc medium at the same speed as a circular reticle having a pattern of information tracks while rotating the reticle, and irradiate the reticle with illuminating light of a slit-like shape or a sectoral shape extending in the diametrical direction of the circular reticle to thereby effect rotation scan exposure.

REFERENCES:
patent: 4899195 (1990-02-01), Gotoh
patent: 4910549 (1990-03-01), Sugita
patent: 5028955 (1991-07-01), Hayashida et al.
patent: 5168021 (1992-12-01), Arai et al.
patent: 5168304 (1992-12-01), Hattori

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