Optical disc and method for manufacturing the same
AssigneeTDK Corporation
InventorsNarutoshi Fukuzawa, Hiroshi Take, Hiroshi Kawahara
Life of this patent
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Abstract
An optical disc is includes a recording layer, a reflective layer, and a protective layer provided, in that order, on one surface of a light-transmissive substrate and a hard coating layer having a thickness in the range of 1 to 5 μm on the other surface of the substrate. The hard coating layer is formed by applying and curing a solution comprising a hard coating agent containing colloidal silica and a UV-curable acrylic resin and a solvent containing propylene glycol monomethyl ether acetate as a principal constituent. The hard coating layer contains 110 mg/cm3 or less of residual solvent.
Claims5
An optical disc comprising:
- a light-transmissive substrate;
- a recording layer, a reflective layer, and a protective layer provided, in that order, on one surface of the substrate;
- and
- a hard coating layer having a thickness in the range of 1 to 5 μm on the other surface of the substrate, the hard coating layer being formed by applying and curing a solution comprising a hard coating agent containing colloidal silica and a UV-curable acrylic resin and a solvent principally containing propylene glycol monomethyl ether acetate, the hard coating layer containing 110 mg/cm3 or less of residual solvent.
Dependencies are inferred from the claim text.