OPTICAL RECORDING MEDIUM

PURPOSE:To prevent spontaneous degradation and to enhance reliability of medium by employing a material, hard to be decomposed, in a recording layer. CONSTITUTION:Polycarbonate is employed in a substrate 1 and a pigment hard to be decomposed, i.e., a phthalocyanine pigment shown by formula I, is emp...

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Bibliographic Details
Main Authors MATSUURA KOTARO, TATSUZONO FUMIO
Format Patent
LanguageEnglish
Published 02.07.1992
Subjects
COLOUR PRINTING
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:PURPOSE:To prevent spontaneous degradation and to enhance reliability of medium by employing a material, hard to be decomposed, in a recording layer. CONSTITUTION:Polycarbonate is employed in a substrate 1 and a pigment hard to be decomposed, i.e., a phthalocyanine pigment shown by formula I, is employed in a recording layer. Cu is employed in a reflective layer. The phthalocyanine pigment is subjected to resistive heating in vacuum to form a recording layer on the substrate and then a reflective layer is formed thereon through vacuum deposition of Cu. Thickness of the recording layer is set to maximize the reflectivity thereof. When the phthalocyanine pigment is employed, improvement of lightfastness can be confirmed and information can be recorded with no trouble.
Bibliography:Application Number: JP19900313475