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US 6,901,043 B2Granted
Scratch-off material layer applied on optical recording media
AssigneeU-Tech Media Corp.
InventorsShi-Hui Zhang, Irene Chen, Hung-Hsum Huang, Hsien-Chin Liu, Kuan-Chung Chang
Life of this patent
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Abstract
An optical recording medium having a scratch-off material layer includes a transparent substrate, a reflective layer formed on the transparent substrate, a protective layer formed on the reflective layer, information formed on a surface of the protective layer, and at least one opaque scratch-off material layer formed on the protective layer for disguising the information.
Claims27
Optical recording media having a scratch-off material layer comprising:
- a transparent substrate comprising a first recordable region for recording a first specific data and a second recordable region for recording a second specific data;
- a reflective layer formed on the transparent substrate;
- a protective layer formed on the reflective layer, and not covering the second recordable region;
- and
- at least one opaque scratch-off material layer formed on the protective layer and covering the second recordable region;
- wherein when the scratch-off material layer is not scratched, the first and second specific data are is-a readable data, and when the scratch-off material layer is scratched, the first specific data is a readable data and the second specific data is becomes a non-readable data.
3 more elements
Dependencies are inferred from the claim text.