Optical information storage medium
AssigneesCase Western Reserve University, Folio Photonics, Inc.
InventorsKenneth D. Singer, Irina Shiyanovskaya
Life of this patent
Estimating the term…
Abstract
An optical information storage medium includes a substrate and a multilayer polymeric film. The multilayer polymeric film has a first surface and an opposite second surface that extend the length of the multilayer polymeric film. The second surface is adhered to a surface of the substrate. The multilayer polymeric film includes a plurality of coextruded alternating polymeric active data storage layers and polymeric buffer layers.
Claims35
An optical information storage medium comprising a substrate and a multilayer polymeric film, the multilayer polymeric film having a first surface and an opposite second surface that extend the length of the multilayer polymeric film, the second surface being adhered to a surface of the substrate, the multilayer polymeric film including a plurality of coextruded alternating polymeric active data storage layers and polymeric buffer layers, the active data storage layers configured to undergo a permanent induced localized nonlinear or threshold change of optical properties when written by a one photon or multi-photon optical writing process, the buffer layers separating the active data storage layers with sufficient thicknesses to axially confine at least one data voxel written by the optical writing process into a single discrete active data storage layer that is readable by an optical reading device, wherein the buffer layers have an average thickness of 3 μm to about 100 μm and wherein at least one of the active data storage layers or buffer layers include a material that limits diffusion of a photosensitive or thermosensitive material from the active data storage layers into the buffer layers.
An optical disc comprising:
- comprising a substrate, a multilayer polymeric film adhered to the substrate, and cover layer adhered to the multilayer polymeric film, the multilayer polymeric film including a plurality of coextruded alternating polymeric active data storage layers and polymeric buffer layers, the active data storage layers configured to undergo a permanent induced localized nonlinear or threshold change of optical properties when written by a one photon or multi-photon optical writing process, the buffer layers separating the active data storage layers with sufficient thicknesses to axially confine at least one data voxel written by the optical writing process into a single discrete active data storage layer that is readable by an optical reading device, wherein the buffer layers have an average thickness of 3 μm to about 100 μm and wherein at least one of the active data storage layers or buffer layers include a material that limits diffusion of a photosensitive or thermosensitive material from the active data storage layers into the buffer layers.
A method of forming an optical disc, the method comprising:
- providing a multilayer polymeric film having a first surface and an opposing second surface, the multilayer polymeric film including a plurality of coextruded alternating polymeric active data storage layers and polymeric buffer layers, the active data storage layers configured to undergo a permanent induced localized nonlinear or threshold change of optical properties when written by a one photon or multi-photon optical writing process, the buffer layers separating the active data storage layers with sufficient thicknesses to axially confine at least one data voxel written by the optical writing process into a single discrete active data storage layer that is readable by an optical reading device, wherein the buffer layers have an average thickness of 3 μm to about 100 μm and wherein at least one of the active data storage layers or buffer layers include a material that limits diffusion of a photosensitive or thermosensitive material from the active data storage layers into the buffer layers;
- applying a cover layer to a first surface of the multilayer polymeric film;
- and adhering the second surface of the multilayer polymeric film to a surface of a substrate.
Dependencies are inferred from the claim text.