Write-once high density optical storage medium and process for fabricating the same
AssigneeRitek Corporation
InventorsShyhyeu Wang, Chun-Han Wu
Life of this patent
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Abstract
A write-once high density optical storage medium. The optical storage medium is applicable in an optical read or write system with blue laser having a wavelength in between 385 nm to 425 nm and an objective lens with numerical aperture (NA) greater than 0.8 and includes the following film structure: a substrate; a reflective layer disposed on the substrate; a dye recording layer disposed on the reflective layer; a protective layer disposed on the dye recording layer; and a cover layer disposed on the protective layer. The protective layer prevents direct contact between the dye recording layer and cover layer, thus assuring the medium quality.
Claims23
A write-once high density optical storage medium, applicable in an optical read or write system with blue laser having a wavelength in between 385 nm to 425 nm and an objective lens with numerical aperture (NA) greater than 0.8, the optical storage medium comprising:
- a substrate;
- a reflective layer disposed on the substrate;
- a dye recording layer disposed on the reflective layer;
- a protective layer disposed on the dye recording layer;
- and
- a cover layer disposed on the protective layer, the cover layer having a thickness of 50 μm to 200 μm.
A write-once high density optical storage medium, applicable in an optical read or write system with blue laser having a wavelength in between 385 nm to 425 nm and an objective lens with numerical aperture (NA) greater than 0.8 the optical storage medium comprising:
- a substrate;
- a reflective layer disposed on the substrate;
- a dye recording layer disposed on the reflective layer;
- and
- a cover layer disposed on the dye recording layer, the cover layer having a thickness of 50 μm to 200 μm,
- characterized in that the optical storage medium further includes a protective layer disposed between the dye recording layer and the cover layer.
A process for fabricating a write-once high density optical storage medium, comprising the following steps:
- forming a reflective layer on a substrate by sputtering;
- forming a dye recording layer on the reflective layer by spin coating or vacuum deposition;
- forming a protective layer on the dye recording layer by sputtering;
- and
- forming a cover layer on the protective layer.
Dependencies are inferred from the claim text.