Method of manufacturing an optical storage medium and...

Details Method of manufacturing an optical storage medium and... Method of manufacturing an optical storage medium and...

2007-05-22

2007-05-22

Neyzari, Ali (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S288000, C369S280000, C428S064400

Reexamination Certificate

active

10514589

ABSTRACT:
A method of manufacturing an optical storage medium is provided, which comprises at least a transparent spacer layer (22) or transparent cover layer. This layer is provided by spincoating a liquid layer (22) between an inner radius ri and outer radius ro and substantial solidification by means of exposure to e.g. UV-radiation. The solidification of the liquid (22) is started at ri at a moment in time defined as t=ti. The solidification of the liquid (22) at ro takes place at a moment in time defined as t=to and to=ti+d and d>1 s. The solidification of the liquid (22) between ri and ro takes place at a moment in time between ti and to. The advantage is that the radial thickness uniformity of the solidified liquid (22) is substantially improved and better than +/−μm. Further an optical storage medium is provided manufactured using the method wherein additionally a stamper, preferably transparent to radiation, is pressed into an unsolidified top portion of the liquid layer (22) and solidified using a special device. In this way information is provided into the spacer layer (22) without disturbing the thickness uniformity of the spacer layer (22).

REFERENCES:
patent: 2006/0059501 (2006-03-01), Vromans et al.
patent: 60182534 (1985-09-01), None
patent: 02010539 (1990-01-01), None
patent: 06004910 (1994-01-01), None
patent: 10074342 (1998-03-01), None

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