Process for preparing substrate of optical disc

Details Process for preparing substrate of optical disc Process for preparing substrate of optical disc

1989-10-03

1991-09-03

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making named article

430296, 430397, 430945, G11B 724

Patent

active

050454382

ABSTRACT:
A process for the preparation of a substrate of an optical disc having a groove or a series of pits at a predetermined track pitch which comprises the steps of: recording a latent pattern image of the groove or the series of pits on a resist disc comprising a glass disc and a photoresist layer formed thereon, by irradiating a surface of the photoresist layer of the resist disc under rotation at a predetermined velocity with a laser beam or an electron beam emitting from a recording head; producing a stamper using the resist disc having the latent pattern image; and producing the substrate by molding a material of the substrate using the stamper as a mold, is disclosed. In the process of producing a recorded resist disc (i.e., cutting process), the recording head moves in a radial direction of the resist disc at a velocity V.sub.1 which is defined by the following equation:

REFERENCES:
patent: 4410968 (1983-10-01), Frohbach et al.
patent: 4716063 (1987-12-01), Uehara et al.

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