Recording media with features to render media unreadable and method and apparatus for replication of said media
View Patent ↗Optical recording media configured to deter unauthorized access are described. Methods for manufacturing the optical recording media described above are also presented.
1. An optical recording medium having at least a first read surface, comprising:
a substrate;
an information layer on said substrate; and
a first film layer including a first surface and a second surface, said first film layer being positioned between said first read surface and said substrate,
wherein said first film layer is configured with a film thickness and a light transmissive property such that one of the following occurs: (a) said film layer is removed to allow a light beam incident on said first read surface to focus on said information layer; and (b) removal of said film layer inhibits a light beam incident on said first read surface from being focused on said information layer.
2. The optical recording medium of claim 1 , wherein said optical recording medium further includes a device between said first film layer and a first substrate.
3. The optical recording medium of claim 2 , wherein said device is a radio frequency identification device.
4. The optical recording medium of claim 1 , wherein said device is a material with optical properties that changes between two or more states upon application of light energy of a wavelength in a predetermined range.
5. The optical recording medium of claim 1 further comprising an adhesive layer bonding said first film layer to said optical recording medium, wherein said adhesive layer has a layer thickness within a predetermined range, and said removal of said first film layer inhibits said light beam incident on said first read surface from focusing on said one or more information layers.
6. A method of manufacturing an optical recording medium, comprising:
forming a substrate having a predetermined thickness and an information layer;
forming a film layer on a light incident surface of said optical recording medium,
said film layer having a selected film thickness and a light transmissive property such that one of the following occurs: (a) said film layer is removed to allow a light beam incident on said first read surface to focus on said information layer; and (b) removal of said film layer inhibits a light beam incident on said first read surface from being focused on said information layer.
7. The method of claim 6 further comprising attaching a device to said substrate prior to applying said film layer to said optical recording medium.
8. The method of claim 6 further comprising attaching a device to said film layer prior to applying said film layer to said optical recording medium.
9. The method of claim 6 , further comprising configuring said film layer to receive a device.