Title:
WRITE ONCE OPTICAL DISK FOR CD OR CD-ROM
Document Type and Number:
Japanese Patent JP2500969
Kind Code:
B2
Abstract:
PURPOSE: To obtain a write once optical disk for a CD or CD-ROM excellent in stability and also improved in recording characteristics by successively laminating a recording film containing a specific phthalocyanine compound, a reflecting film and a protective film on a transparent substrate.
CONSTITUTION: A predetermined amount of a phothalocyanine compound represented by formula I [wherein X1-X4 are substituents such as an alkyl group, an aryl group, an aralkyl group or an aryloxy group, n1-n4 are an integer of 0-4, M is a metal such as Al or Ga, Z is a group represented by formula II (wherein R1 and R2 are an alkyl group or an aryl group) and m is 1 or 2] is dissolved in an org. solvent to prepare a coating solution for a recording film. This coating solution is applied to a transparent substrate made of glass or a synthetic resin and dried to form the recording film. A film of metal such as Au, Al or Co is formed on the recording film by vacuum vapor deposition to form a reflecting film and, subsequently, an ultraviolet curable resin is applied to the reflecting film by spin coating and dried to form a protective film to obtain a write once optical disk.
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Inventors:
SAKAMOTO MARE
TAMANO MICHIKO
TAMANO MICHIKO
Application Number:
JP32389291A
Publication Date:
May 29, 1996
Filing Date:
November 12, 1991
Export Citation:
Assignee:
TOYO INK MFG CO
International Classes:
B41M5/26; C09B47/18; G11B7/24; G11B7/244; (IPC1-7): B41M5/26; C09B47/18; G11B7/24
Domestic Patent References:
| JP648903A | ||||
| JP6438289A |