Patent ID: 7885173
Filing Date: 2011-02-08
Classification: G11B

Abstract:
1. A write-once information recording medium comprising a transparent resin substrate with concentric or spiral grooves and lands, and a recording film formed on the grooves and lands of the transparent resin substrate, wherein the recording film comprises an organic dye layer comprising a metal complex monomer comprising a structure in which two constituent units represented by formula (1) are arranged for one central metal and a metal complex polymer comprising a structure in which two constituent units represented by formula (2) are arranged for one central metal; a recording mark is formed in the organic dye layer by emission of a short-wavelength laser beam, and light reflectance of the recording mark formed by emission of the short-wavelength laser beam is higher than light reflectance before the emission of the short-wavelength laser beam in the organic dye layer; and the grooves wobble within a predetermined amplitude range, wherein ring C in (1) is a substituted hydrocarbon ring, a non-substituted hydrocarbon ring, a substituted heterocyclic ring, or a non-substituted heterocyclic ring; the central metal in (1) is selected from the group consisting of magnesium, aluminum, scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, ruthenium, rhodium, palladium, indium, tin, hafnium, osmium, platinum, gold, silver, tantalum, tungsten, molybdenum, and yttrium; X in formula (1) comprises an atom or group selected from the group consisting of a hydrogen atom, a halogen atom selected from the group consisting of a fluorine atom, a chlorine atom, and a bromine atom, a hydroxyl group, an amino group, a nitro group, a cyano group, a carboxyl group, an alkoxycarbonyl group, an aralkyloxycarbonyl group, an aryloxycarbonyl group, an acyl group, an arylcarbonyl group, a heteroarylcarbonyl group, an alkyl group, an aralkyl group, an aryl group, a heteroaryl group, an alkenyl group, an alkinyl group, a metalocenyl group, an alkoxy group, an aralkyloxy group, an aryloxy group, a heteroaryloxy group, an acyloxy group, an alkylthio group, an aralkylthio group, an arylthio group, a heteroarylthio group, an alkylamino group, an arylamino group, a heteroarylamino group, an alkylcarbonylamino group, an arylcarbonylamino group, a phenyl group, a phthaloimide group, and a barbituric acid group; Y in formula (1) comprises an active hydrogen group selected from the group consisting of —SH, —SO R3, R4, and R5 in formula (1) comprise an atom or group selected from the group consisting of a hydrogen atom, a halogen atom selected from the group consisting of a fluorine atom, a chlorine atom, and a bromine atom, a hydroxyl group, an amino group, a nitro group, a cyano group, a carboxyl group, an alkoxycarbonyl group, an aralkyloxycarbonyl group, an aryloxycarbonyl group, an acyl group, an arylcarbonyl group, a heteroarylcarbonyl group, an alkyl group, an aralkyl group, an aryl group, a heteroaryl group, an alkenyl group, an alkinyl group, a metalocenyl group, an alkoxy group, an aralkyloxy group, an aryloxy group, a heteroaryloxy group, an acyloxy group, an alkylthio group, an aralkylthio group, an arylthio group, a heteroarylthio group, an alkylamino group, an arylamino group, a heteroarylamino group, an alkylcarbonylamino group, an arylcarbonylamino group, a phenyl group, a phthaloimide group, and a barbituric acid group, wherein ring C in formula (2) is a substituted hydrocarbon ring, a non-substituted hydrocarbon ring, a substituted heterocyclic ring, or a non-substituted heterocyclic ring; the central metal is selected from the group consisting of magnesium, aluminum, scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, zirconium, ruthenium, rhodium, palladium, indium, tin, hafnium, osmium, platinum, gold, silver, tantalum, tungsten, molybdenum, and yttrium; R1 in formula (2) comprises an atom or group selected from the group consisting of a hydrogen atom, a halogen atom selected from the group consisting of a fluorine atom, a chlorine atom, and a bromine atom, a hydroxyl group, an amino group, a nitro group, a cyano group, a carboxyl group, an alkoxycarbonyl group, an aralkyloxycarbonyl group, an aryloxycarbonyl group, an acyl group, an arylcarbonyl group, a heteroarylcarbonyl group, an alkyl group, an aralkyl group, an aryl group, a heteroaryl group, an alkenyl group, an alkinyl group, a metalocenyl group, an alkoxy group, an aralkyloxy group, an aryloxy group, a heteroaryloxy group, an acyloxy group, an alkylthio group, an aralkylthio group, an arylthio group, a heteroarylthio group, an alkylamino group, an arylamino group, a heteroarylamino group, an alkylcarbonylamino group, an arylcarbonylamino group, a phenyl group, a phthaloimide group, and a barbituric acid group; and Y in formula (2) comprises an active hydrogen group selected from the group consisting of —SH, —SO