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Optical information storage medium

A technology for optical information and storage media, applied in the field of three-dimensional multi-layer optical information storage media, can solve the problems of difficulty in economical scale, complex and expensive lasers, etc.

Active Publication Date: 2014-04-30
CASE WESTERN RESERVE UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have obvious limitations
Holographic storage requires complex and potentially expensive optical read / write hardware
Similarly, the lasers required for multiphoton absorption are more complex, expensive and introduce an additional source of noise
Physical layering uses simpler hardware, but fabrication of multiple layers in storage media has proven difficult to scale economically

Method used

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Examples

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Embodiment

[0086] This example describes a coextrusion process for the manufacture of roll-to-roll multilayer (ML) films for high density optical data storage systems ODS. The method can easily produce contiguous, complete storage media, hundreds of meters in length and meters in width, suitable for a variety of formats with a total writable area sufficient for gigabyte to petabyte scale capacities. The coextrusion method is also low cost and simpler than current fabrication methods such as spin coating and lamination.

[0087] This example also demonstrates data storage of 23 layers of 78 μm thick, 100 m long ML strips by fluorescence (FL) quenching of organic dyes, using a continuous-wave Blu-Ray (BR) laser. The areal density was found to be similar to commercial disks, and the small layer spacing allowed by the FL-based scheme yielded 1.2x10 12 cm 3 bit density. Given the mechanism and high shaft density, crosstalk during writing was also checked. The approach is general so that m...

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Abstract

An optical information storage medium includes a multilayer film that includes a plurality of extruded alternating active data storage layers and buffer layers, which separate the active data storage layers. The active data storage layers and buffer layers have thicknesses that allow the active data storage layers to be writable by permanent or reversible one- or multiphoton, linear, nonlinear, or threshold optical writing processes to define data voxels within the active data storage layers that are readable by an optical reading device.

Description

[0001] related application [0002] This application claims priority to US Provisional Application No. 61 / 494,966, filed June 9, 2011, the subject matter of which is incorporated herein by reference in its entirety. [0003] Government funding [0004] This invention was made with Government support under Grant No. RES501499 awarded by the National Science Foundation. The United States Government may have certain rights in this invention. technical field [0005] The present application relates to optical information storage media, and in particular to three-dimensional multilayer optical information storage media formed using polymer extrusion methods. Background technique [0006] Media that can be patterned by exposure are common manifestations of information storage. In one of the oldest techniques, photographic emulsions are used to record images of light incident on them. Recently there has been a growing need to store information by optical means for archiving, se...

Claims

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Application Information

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IPC IPC(8): G11B7/004G11B7/24
CPCG11B2007/24624G11B7/24038G11B7/26G11B7/004G11B7/24G11B7/0052G11B7/0079G11B7/24027G11B7/24056G11B7/24065G11B7/242G11B2007/0013G11B2007/240025
Inventor K·D·桑热C·赖安J·山J·洛特C·韦德B·威莱E·贝尔
Owner CASE WESTERN RESERVE UNIV
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