Optical recording material
AssigneeAsahi Denka Kogyo Kabushiki Kaisha
InventorsKeiji Oya, Atsurou Tomita, Toru Yano
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Abstract
An optical recording medium comprising a substrate having formed thereon a thin film comprising an organic compound dye that can form pits when irradiated with a semiconductor laser beam and a compound represented by formula (I) as a recording layer: 1 wherein X represents a metallocene group; ring A represents a specific heterocyclic ring with the metallocene group X bonded to the 2-position thereof; Anm− represents an m-valent anion; m represents 1 or 2; and p represents a coefficient for maintaining the charges neutral.
Claims12
An optical recording medium comprising a substrate having formed thereon a thin film comprising an organic compound dye that can form pits when irradiated with a semiconductor laser beam and a compound represented by formula (I) as a recording layer:
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- wherein X represents a metallocene group;
- ring A represents a heterocyclic group selected from the group consisting of:
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- wherein n represents an integer of 0 to 2;
- R represents an organic group having 1 to 30 carbon atoms;
- R1 represents a hydrogen atom, a halogen atom, a nitro group, a cyano group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or an aryl group having 6 to 30 carbon atoms;
- Y represents an alkylidene group having 1 to 6 carbon atoms, or a cycloalkylidene group having 3 to 6 carbon atoms, with the metallocene group X bonded to the 2-position thereof;
- Anm− represents an m-valent anion;
- m represents 1 or 2;
- and p represents a coefficient for maintaining the charges neutral.
The optical recording medium wherein said Anm−is diphenylamine-4-sulfonate.
Dependencies are inferred from the claim text.