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1. WO1998053451 - ARCHIVAL IMAGING AND METHOD THEREFOR

Publication Number WO/1998/053451
Publication Date 26.11.1998
International Application No. PCT/US1998/010344
International Filing Date 21.05.1998
Chapter 2 Demand Filed 30.11.1998
IPC
C CHEMISTRY; METALLURGY
25
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
D
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; JOINING WORKPIECES BY ELECTROLYSIS; APPARATUS THEREFOR
11
Electrolytic coating by surface reaction, i.e. forming conversion layers
02
Anodisation
04
of aluminium or alloys based thereon
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
24
Record carriers characterised by shape, structure or physical properties, or by the selection of the material 
26
Apparatus or processes specially adapted for the manufacture of record carriers
C25D 11/04 (2006.01)
G11B 7/26 (2006.01)
CPC
B41M 5/262
C25D 11/04
G11B 7/26
Y10S 148/903
Y10S 430/146
Y10T 428/12701
Applicants
  • FROMSON, Howard, A. [US/US]; US
Inventors
  • FROMSON, Howard, A.; US
  • ROZELL, William, J.; US
Agents
  • LYNCH, John, E.; Fulbright & Jaworski LLP 666 Fifth Avenue New York, NY 10103, US
Priority Data
09/019,83006.02.1998US
09/038,67211.03.1998US
09/079,73415.05.1998US
60/047,44622.05.1997US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ARCHIVAL IMAGING AND METHOD THEREFOR
(FR) ARCHIVAGE D'IMAGES ET PROCEDE CORRESPONDANT
Abstract
(EN)
An archival medium, such as a compact disc, is made of a metal such as aluminum which is mechanically roughened and visibly imageable by selective exposure to infrared laser radiation. A mechanically roughened aluminum medium can also be anodically oxidized under conditions that do not impair the ability of the substrate to be laser imaged. The archival medium can be coated with opaque and transparent polymer coatings before or after imaging for security and/or protection. The coating can be a laser ablatable coating to provide a tamper-proof medium.
(FR)
Cette invention se rapporte à un support d'archivage, du type disque compact, qui est constitué d'un métal tel que l'aluminium, dont la surface est rendue rugueuse par procédé mécanique et sur lequel il est possible d'enregistrer des images par exposition sélective à un rayonnement infrarouge. Un support en aluminium rendu mécaniquement rugueux peut également être soumis à une oxydation anodique dans des conditions telles que la capacité du substrat à être imprimé au laser n'est pas modifiée. Il est possible de recouvrir ce support d'archivage de revêtements polymères transparents aux U.V. et opaques au rayonnement visible, avant ou après l'enregistrement des images, à des fins de sécurité et/ou protection. Ledit revêtement peut être conçu pour subir une ablation par laser, ce qui permet de disposer d'un support inviolable.
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