Title:
OPTICAL DATA RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP3500474
Kind Code:
B2
Abstract:
PURPOSE: To obtain an optical data recording medium such as a write-once CD extended in preservation life and reduced in the deterioration due to reproduction, in an optical data recording medium wherein a recording layer and a protective layer are provided on a substrate, by adding a phthalocyanine compd. represented by a specific formula to the recording layer.
CONSTITUTION: In an optical recording medium wherein a recording layer is provided on a substrate directly or through an undercoat layer and a protective layer is provided on the recording layer, a phthalocyanine compd. represented by general formula [M is a metal atom which may have two hydrogen atoms, halogen atoms or oxygen atoms or a metal atom which may have-(OR5)p or (OSiR6R7R8)q, R5-R8 are respectively independently a hydrogen atom, an aliphatic hydrocarbon group, p and q are an integer of 0-2 and X1-X4 are respectively independently an-OR1 SiR2R3R4 group] to the recording layer. By this constitution, high absorbing capacity and high reflectivity (refractive index) are obtained and the solubility in an org. solvent is enhanced.
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Inventors:
Tatsuya Tomura
Tsutomu Sato
Noboru Sasa
Tsutomu Sato
Noboru Sasa
Application Number:
JP12840394A
Publication Date:
February 23, 2004
Filing Date:
May 18, 1994
Export Citation:
Assignee:
株式会社リコー
International Classes:
B41M5/26; G11B7/24012; G11B7/244; (IPC1-7): B41M5/26; G11B7/24
Domestic Patent References:
| JP6454069A | ||||
| JP313384A | ||||
| JP1176585A | ||||
| JP371888A | ||||
| JP789240A | ||||
| JP6290291A |
Attorney, Agent or Firm:
Toshiaki Ikeura (1 outside)