Fluorescent composition for the manufacture of CD-ROM type optical memory disks
AssigneeD Data Inc.
InventorsMark Alperovich, Eugene Levich, Irene Zuhi
Life of this patent
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Abstract
A CD-ROM type optical disk, whether single-layer or multi-layer, is formed on a substrate having pits in its surface. The pits are filled with a fluorescent composition. Multiple disks such as that one can be glued on top of one another. Suitable fluorescent compositions include xanthene dyes of the eosine group, xanthene dyes of the rhodamine group, acridine dyes, oxazine dyes, azine dyes, indigoide dyes, perylene dyes, violanthrone dyes, cyanine dyes, phthalocynanine dyes, and porphyrins.
Claims26
A fluorescent composition for manufacture of a single-layer optical disk of CD-ROM type with fluorescence reading, the fluorescent composition comprising:
- at least one fluorescent dye;
- at least one film-forming polymer;
- a plastisizer;
- and
- an organic solvent.
A method of manufacturing a CD-ROM type optical disk, the method comprising:
- providing a substrate which is formed as a disk which has a surface, said surface is covered with pits;
- and
- applying a fluorescent composition by spin coating, roller coating, or dip costing to the surface of the substrate so as to fill the pits with the fluorescent composition, while the surface outside the pits remains free of the fluorescent composition and does not fluoresce.
A fluorescent CD-ROM optical disk comprising at least one substrate, said substrate containing pits wherein said pits are filled or coated with a fluorescent composition, said fluorescent composition comprising a fluorescent dye, a film-forming polymer and a plasticizer.
Dependencies are inferred from the claim text.