Optical information recording medium

Abstract

Abstract PURPOSE:To provide an organic optical information recording medium which has high sensitivity and high density capable of obtaining high CNR (carriorate noise ration) with the irradiation of a low-output laser by containing metal complex of specific monoazo compound in a recording layer. CONSTITUTION:A recording layer has a sole metal complex of monoazo compound represented by the general formula (1), [where X is a residue for forming cyclic ring substituted by electron imparting group or electron absorbing group together with nitrogen atom and carbon atom coupled therewith, Y is a residue for forming an aromatic ring which may be substituted by electron imparting group together with two carbon atoms coupled therewith, and Z is hydroxyl or carboxyl group], or a combination of other materials, and is provided on a support made of an inorganic material such as glass, aluminum, ceramics, or synthetic resin material such as polymethylmethacrylate, polycarbonate, polyester. The support is transparent or opaque, and uses a support having optical property adapted for the recording and reproducing light incident directions. Specially, in the incident light from the transparent support side is preferably used because of the capability of recording and reproducing without influence of dusts adhered to the surface or defects such as scratch. The thickness of the set layer is preferably 10-500nm, and the transmission factor of the recording laser light is preferably 70% or less.

Inventors

• 👤 Atsuo Yoshikawa
• 👤 淳夫 吉川
• 👤 Shiro Osada
• 👤 長田　司郎

Bibliographic Details