OPTICAL STORAGE DEVICE HAVING LIMITED-USE CONTENT AND METHOD FOR MAKING SAME
First Claim
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1. An optical storage device, on which at least some limited-use data is stored, comprising:
- a storage layer for storing data readable by an optical storage device data reader system;
a content access layer covering at least a portion of the data stored on the storage layer and made from a dye composition that comprises a dye compound and that exhibits a measurable change in optical properties upon sufficient exposure to one or more characteristic wavelengths of energy; and
an optically transparent layer through which stored data from the storage layer is accessible,wherein the dye compound comprises a xanthene, a thiazine, an oxazine, a fluorone, or a combination thereof.
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Abstract
The invention relates generally to optical storage devices, such as DVDs and CDs, on which compositions containing dyes are disposed so as to facilitate limited or selective use of at least a portion of the content of the optical storage devices. The invention also relates to methods of making limited-use content optical storage devices.
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Citations
28 Claims
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1. An optical storage device, on which at least some limited-use data is stored, comprising:
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a storage layer for storing data readable by an optical storage device data reader system; a content access layer covering at least a portion of the data stored on the storage layer and made from a dye composition that comprises a dye compound and that exhibits a measurable change in optical properties upon sufficient exposure to one or more characteristic wavelengths of energy; and an optically transparent layer through which stored data from the storage layer is accessible, wherein the dye compound comprises a xanthene, a thiazine, an oxazine, a fluorone, or a combination thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of fabricating a limited-use optical storage device comprising:
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(a) depositing a content access layer on a read surface of a pre-fabricated optical storage device that comprises; (i) a storage layer for storing data readable by an optical storage device data reader system; and (ii) an optically transparent layer through which stored data from the storage layer is accessible, wherein the content access layer is made from a dye composition comprising a dye compound and that exhibits a measurable change in optical properties upon sufficient exposure to one or more characteristic wavelengths of energy; (b) optionally depositing a second optically transparent layer upon the content access layer; (c) selectively exposing at least a portion of the dye composition of the content access layer to the energy emitted by the optical storage device data reader system for a sufficient time to effect the change in optical properties; and (d) forming at least one region on the optical storage device that is interpreted as a read error, a parity error, or both by the optical storage device data reader system, wherein the dye compound exhibits the measurable change in optical properties upon not more than about 100 seconds of direct exposure to a light source emitting wavelengths from about 635 nm to about 650 nm at an intensity from about 5 mW to about 10 mW. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A method of fabricating a limited-use optical storage device comprising:
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providing a storage layer for storing data readable by an optical storage device data reader system; providing an optically transparent layer through which stored data from the storage layer is accessible; depositing a content access layer on any surface of the optical storage device between the storage layer and the optical storage device data reader system so as to cover at least a portion of the data stored on the storage layer, wherein the content access layer is made from a dye composition that comprises a dye compound and that exhibits a measurable change in optical properties upon sufficient exposure to one or more characteristic wavelengths of energy emitted by the optical storage device data reader system; selectively exposing at least a portion of the dye composition of the content access layer to the energy emitted by the optical storage device data reader system for a sufficient time to effect the change in optical properties; and forming at least one region on the optical storage device that is interpreted as a read error, a parity error, or both by the optical storage device data reader system, wherein the dye compound exhibits the measurable change in optical properties upon not more than about 100 seconds of direct exposure to a light source emitting wavelengths from about 635 nm to about 650 nm at an intensity from about 5 mW to about 10 mW. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification