Producing cover layers in optical discs

Details Producing cover layers in optical discs Producing cover layers in optical discs

2008-01-15

2008-01-15

Tadesse, Yewebdar (Department: 1734)

Coating apparatus

With means to centrifuge work

C118S641000, C118S642000, C118S666000

Reexamination Certificate

active

07318867

ABSTRACT:
Techniques for a cover layer with uniform thickness are disclosed. The cover layer is formed with a type of material, such as glue, in hardened form. In one embodiment, a certain amount of the material in liquid form is dispensed onto a dispensing structure. After the dispensing structure is engaged to hold a disc, the dispensing structure and the disc as a whole unit is rotated at a predefined speed. While the dispensed material on the dispensing structure is being dispersed evenly onto the surface of the disc as result of the centrifugal force, a heater is employed to retain or control the temperature of the dispensed material so that the flow of the dispensed material outwards can be effectively controlled to form a cover layer of uniform thickness on the disc.

REFERENCES:
patent: 6025012 (2000-02-01), Matsuda et al.
patent: 6497925 (2002-12-01), Chen et al.
patent: 10289489 (1998-10-01), None
patent: 11165114 (1999-06-01), None
English translated Abstract of JP-11-165114.
English Translated Abstract of JP-10-289489.

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