Manufacturing method of magneto-optical master disk

Details Manufacturing method of magneto-optical master disk Manufacturing method of magneto-optical master disk

1995-07-05

1998-10-13

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 133, 264 25, 264 137, 4251744, B29D 1100, G11B 724

Patent

active

058207953

ABSTRACT:
It can be selected whether to form a both-side wobble groove whose both side walls wobble by irradiating two light beams while oscillating the same along the radius of a magneto-optical master disk, or to form a one-side wobble groove one of whose side walls alone wobbles by irradiating two light beams while fixing one of the same and oscillating the other along the radius of the magneto-optical master disk. Then, either a single one-side or both-side groove for tracking-use is formed by irradiating both the two light beams on a photo-resist applied on a glass substrate in accordance with address data. As a result, grooves of different types, both-side and one-side grooves, can be formed continuously in the exposing process.

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patent: 5279775 (1994-01-01), Thomas et al.
patent: 5539724 (1996-07-01), Ohtomo
Dr. G. Otte, et al, "Langspiel-Bildplatte mit optischer Abtastung", Funk-Technik, 1972 No. 19, vol. 2, pp. 692-694.

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