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EP0123223A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Laser recording medium

Assignee: Fujifilm Holdings Corp
•
Filing: 1984-04-12
•
Granted: —
•
Expires: 2004-04-12
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Abstract

Abstract A laser recording medium is disclosed. The medium is comprised of a transparent base having thereon a laser readable-recordable material layer. On the surface opposite the laser readable-recordable layer is provided an inorganic material film which in turn has a protective layer provided thereon. The protective layer is comprised of a radiation hardenable resin film or a plasma polymerization film. The inorganic material layer provides excellent moisture protection and the protective film provides improved scratch resistance. The layers have been found to adhere together well and provide an improved laser recording medium.

Inventors

  • 👤 Toshiyuki Masuda
  • 👤 Yonosuke Takahashi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 15:37
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/2403; G11B7/24053; G11B7/241; G11B7/252; G11B7/254; G11B7/2542

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 64 words
A laser recording medium, comprising: a transparent plastic base having thereon; a laser readable-recordable material layer; an inorganic film provided on the base at a side opposite the side where the laser readable-recordable material layer is provided; and a protective layer selected from the group . consisting of a radiation hardenable resin film and a plasma polymerization film provided on the inorganic material film.
Claim 2
Dependent Claim 64 words
A laser recording medium, comprising: a transparent plastic base having thereon; a laser readable-recordable material layer; an inorganic film provided on the base at a side opposite the side where the laser readable-recordable material layer is provided; and a protective layer selected from the group . consisting of a radiation hardenable resin film and a plasma polymerization film provided on the inorganic material film.
Claim 3
Dependent Claim 32 words
A laser recording medium as claimed in Claim 1, wherein the inorganic material film is comprised of a compound selected from the group consisting of silicon dioxide, silicon monoxide and magnesium fluoride.
Claim 4
Dependent Claim 26 words
A laser recording medium as claimed in Claim 2, wherein the inorganic material film has a thickness in the 0 range of 100 to 5,000 A.
Claim 5
Dependent Claim 19 words
A laser recording medium as claimed in Claim 1, wherein the protective layer is a radiation hardenable resin film.
Claim 6
Dependent Claim 20 words
A laser recording medium as claimed in Claim 1, wherein the protective layer is comprised of a plasma polymerization film.
Claim 7
Dependent Claim 26 words
A laser recording medium as claimed in Claim 4, wherein the radiation hardenable resin film has a thickness in the range of 0.1 to 100 µm.
Claim 8
Dependent Claim 26 words
A laser recording medium as claimed in Claim 5, wherein the plasma polymerization film has a thickness in the range of 300 A to 10 µm.

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