| 摘要 |
PURPOSE:To obtain an optical recording medium capable of optical writing with semiconductor laser, by a method wherein an A layer consisting of monomolecular film of diacetylene derivative compound having hydrophilic portions as well as hydrophobic portions is laminated on a B layer containing at least one among a pyrylium dye, a thiopyrylium dye, and a selenapyrylium dye. CONSTITUTION:As a DA compound of diacetylene derivative compound having hydrophilic portions and hydrophobic portions, a compound shown by a formula (I) is typically used. A pyrylium dye, a thiopyrylium dye, or a selenapyrylium dye is a compound shown by a structural formula (II) which has an absorption peak at 780-900nm and heats by irradiation of an infrared ray of this wave length. An optical recording medium consists of a substrate 1 and a recording layer 2. The recording layer 2 is so constructed as to form a B layer 4 containing a pyrylium dye group on the substrate 1 and thereon an A layer 3 made of a monomolecular film or cumulative film of the DA compound. In this construction, a recording can be conducted with high-density and high- resolving power. |
