Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Optical information medium

A technology of optical information and media, applied in the field of optical information media, can solve problems such as insufficient storage capacity and the impact of errors

Inactive Publication Date: 2006-07-19
KONINK PHILIPS ELECTRONICS NV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 4.7GB single-layer rewritable DVD format is easier to handle than, for example, a conventional CD (Compact Disc), but has insufficient storage capacity for video recording purposes
This requires a skilled optical designer, and the methods described above are susceptible to errors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical information medium
  • Optical information medium
  • Optical information medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] in the attached figure 1 A first exemplary embodiment of an erasably recordable optical information medium 20 according to the DVR-Blue format is shown in . A radiation beam 10 having a radiation wavelength λ of 405 nm and a numerical aperture NA of 0.85 is focused in a medium 20 . The medium 20 has a substrate 1 and a stack 2 of layers provided thereon. Stack 2 includes a first recording stack 3 with an IPIM layer structure, in this order, where I is composed of (ZnS) 80 (SiO 2 ) 20 Fabricated dielectric layer, P is a compound with Ge 14 Sb 28 Te 5 8 phase change alloy, M is the metal mirror layer of aluminum (Al). The thicknesses of the layers in IPIM recording stack 3 are 115 nm, 27 nm, 26 nm and 100 nm, respectively. The Al layer is in the vicinity of the substrate 1 . The stack 2 further comprises two radiation beam transmissive layers 4 , 5 . The first transmission layer 4 is made of ultraviolet curing resin, such as Daicure EX-860 provided by Dainippon...

Embodiment 2

[0039] in the attached figure 2 A second exemplary embodiment of an erasably recordable optical information medium 20 according to the DVR-Blue format is shown in . A radiation beam 10 having a radiation wavelength λ of 405 nm and a numerical aperture NA of 0.85 is focused in a medium 20 . The medium 20 has a substrate 1 and a stack 2 of layers provided thereon. The stack 2 comprises a first recording stack 3 identical to the stack 3 described in exemplary embodiment 1 and two radiation beam transmissive layers 6 , 7 . The first transmissive layer 6 is made of a layer of pressure sensitive adhesive (PSA) commercially available from eg 3M. The PSA layer 6 may comprise a transparent backing and / or a carrier layer, such as an optionally surface-treated amorphous polymer layer, such as polyethylene terephthalate (PET) with an adhesive layer on each side. , PC or polymethyl methacrylate (PMMA) layer, but preferably it is a transfer film that does not include a backing and / or ca...

Embodiment 3

[0043] in the attached image 3 A third exemplary embodiment of an erasably recordable optical information medium 20 according to the DVR-Blue format but with an additional second recording layer is shown in . A radiation beam 10 having a radiation wavelength λ of 405 nm and a numerical aperture NA of 0.85 is focused in a medium 20 . The medium 20 has a substrate 1 and a stack 2 of layers provided thereon. The stack 2 comprises a first recording stack 3 , a second recording stack 3 ′ and three radiation beam transmissive layers 11 , 12 , 13 . The first recording stack 3 has an IPIM structure similar to that of the exemplary embodiment 1, including in the following order:

[0044] - Dielectric layer (ZnS) with a thickness of 30 nm 80 (SiO 2 ) 20 ,

[0045] - Compound GeSb with a thickness of 25 nm 2 Te 4 record layer,

[0046] - Dielectric layer (ZnS) with a thickness of 15 nm 80 (SiO 2 ) 20 ,

[0047] - An aluminum mirror layer adjacent to the substrate with a thi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

An optical information medium (20) for recording, such as DVR-blue, and a method for manufacturing such a medium (20) is provided. Reading from and recording onto the medium (20) is performed by means of a focused radiation beam (10) having a radiation wavelength » and a numerical aperture NA. Said medium has a substrate (1), and a stack (2) of layers provided thereon. The stack (2) comprises at least a first recording stack (3) and k radiation beam transmissive layers (4, 5). Each transmissive layer (4, 5) has a refractive index n i and an average thickness d i µm and 1 ‰ i ‰ k and k ‰¥ 2. The thickness d k of layer k (5) is determined by a simple formula which depends on the parameters n i for i = 1...k and d i for i = 1...k-1. Such a medium (20) has zero or substantially zero spherical aberration at the focal point, being at the recording layer of the first recording stack (3), of said radiation beam (10).

Description

[0001] This application is a divisional application of the application No. 01807089.2, the filing date is December 20, 2001, and the invention title is "Optical Information Media and Method for Manufacturing the Media". technical field [0002] The invention relates to an optical information medium for recording by means of a focused radiation beam having a radiation wavelength λ and a numerical aperture NA, said medium having a substrate and a stack of layers provided on the substrate, the stack comprising at least a first a recording stack and k radiation beam transmitting layers, each radiation beam transmitting layer having a refractive index n i and average thickness d i microns, and 1≤i≤k and k≥2. [0003] The invention further relates to a method of manufacturing such an optical information medium. Background technique [0004] An example of such an optical information medium is disclosed in European patent application EP-A-1047055. In particular, the use of a ligh...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/24G11B7/26G11B7/2433G11B7/24027G11B7/2403G11B7/24038G11B7/24067G11B7/243G11B7/254G11B7/2542G11B7/257G11B7/258G11B7/2585
CPCG11B7/2403G11B7/254G11B2007/24314G11B7/257G11B7/26G11B7/2542G11B7/24038G11B7/24067G11B7/243G11B2007/24316G11B7/2585G11B2007/24312Y10T428/21G11B7/24056G11B2007/25705
Inventor B·H·W·亨德里克斯
Owner KONINK PHILIPS ELECTRONICS NV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com