Multi-layer recording medium and method for producing same
AssigneeSony Corporation
InventorsHiroshi Ohki, Toshiyuki Kashiwagi, Motohiro Furuki
Life of this patent
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Abstract
A multi-layer recording medium including a light-transmitting substrate, a first information recording layer formed on the substrate, an intermediate layer at least part of which is formed of a photo-curable resin film, and which is formed on the first information recording layer, a second information recording layer formed on a surface of the intermediate layer opposite to the surface facing the first information signal layer, and a protective layer formed on the second information signal layer. A method for producing such multi-layer recording medium is also disclosed.
Claims8
A method for producing a multi-layer recording medium comprising the steps of:
- pressure bonding a photo-curable resin film to a substrate having a first information recording layer formed thereon;
- photo-curing said photo-curable resin film by light irradiation;
- interposing a liquid photo-curable resin between said photo-curable resin film and a master disc;
- peeling off the master disc from the liquid photo-curable resin thereby forming an intermediate layer and a second information recording layer on said intermediate layer;
- sputtering a reflective film on said second information layer;
- and
- forming a protective layer on said reflective film.
A method for producing a multi-layer recording medium comprising the steps of:
- forming a first information recording layer on a substrate by a first master disc;
- bonding a photo-curable resin film to said substrate by pressing between pressure rollers;
- photo-curing said photo-curable resin film by light irradiation;
- interposing a liquid photo-curable resin between said photo-curable resin film and a second master disc;
- curing said liquid photo-curable resin by light irradiation thereby forming an intermediate layer;
- peeling off said second master disc from said cured liquid photo-curable resin;
- thereby
- transcribing a second information recording layer onto said intermediate layer;
- sputtering a reflective film on said second information layer;
- and
- forming a protective layer on said reflective film.
Dependencies are inferred from the claim text.