Patent ID: 8127323

Claim:
An information storage medium with a Low-to-High recording characteristic, the information storage medium comprising: a light reflective layer; a recording layer formed on or above the light reflective layer, the recording layer including an unrecorded portion, a part of the recording layer being recordable with light in the range of wavelengths between 355 nm and 455 nm; and a transparent layer formed on or above the recording layer, wherein light is incident to the light reflective layer through the transparent layer and the recording layer, and light is reflected by the light reflective layer, wherein the recording layer comprises an organic metal complex including cobalt, nickel, scandium, yttrium, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chrome, molybdenum, tungsten, manganese, technetium, rhenium, iron, ruthenium, osmium, rhodium, iridium, palladium, platinum, copper, silver, gold, zinc, cadmium, or mercury, and the recording layer has properties of a light absorbance in a recorded portion being smaller than a light absorbance in the unrecorded portion in a wavelength range of 355 nm to 455 nm, and a light absorbance in the unrecorded portion at a wavelength of 405 nm being not smaller than 40% of the light absorbance in the unrecorded portion at a peak absorption wavelength in a range of wavelengths longer than 405 nm, the peak absorption wavelength being a wavelength for which the light absorbance in the unrecorded portion, in the range of wavelengths longer than 405 nm, is highest.