Mitsubishi Kagaku Media Co., Ltd.

Hideharu Takeshima

Naoyuki Uchida

Mitsugu Wakabayashi

Hideyuki Kubo

Susumu Satou

Katsumi Ebashi

Shigeyuki Furomoto

Masafumi Aga

Toshifumi Kawano

Yukari Kiritou

Atsushi Komura

Kumi Mizuno

Yumi Matsumura

Masayoshi Akiyama

To produce an optical recording medium having a good concavo-convex shape whereby optical information recording/retrieving is stabilized. A process for producing an optical recording mediumprovided with an interlayerhaving a concavo-convex shape, which comprises a step of forming a recording layeron a substratedirectly or via another layer; a step of placing a resin material layerand a stamperhaving a concavo-convex shape for transfer, in this order on the recording layer, and curing the resin material layerin this laminated state to obtain a bonded bodycomprising the substrate, the recording layer, the resin material layerand the stamper, and a step of separating the stamperfrom the resin material layerso that the concavo-convex shape for transfer is transferred to the resin material layer, and applying surface modification treatment to promote the curing of the resin material layer, to form the interlayer

Process and apparatus for producing optical recording medium

The invention is principally to provide an archival optical recording medium of high quality which has satisfactory recording/reading characteristics when used in high-speed recording and high-density recording. The invention accomplishes the object with an optical recording medium comprising a resin substrate, a recording layer comprising an organic dye, and a reflective layer, wherein the reflective layer has a first reflective layer and a second reflective layer in this order from the side close to the recording layer, the second reflective layer has a thermal conductivity lower than the thermal conductivity of the first reflective layer, and the first reflective layer has a film thickness larger than the thickness of the second reflective layer.

Optical recording medium

In an optical recording medium having a plurality of recording layers on which information can be recorded by irradiating a laser beam from one side thereof, an optimum recording power to each of the recording layers can be determined. The optical recording medium has a plurality of recording layers on which information can be recorded by irradiating a laser beam from one side thereof, and each of the recording layers has a power calibration area (PCA) for optimizing the intensity of the laser beam.

Optical recording medium with power calibration areas and a recording method therefor with optimum power control

Optical recording method and medium on which recording and/or reading are performed from one side

An optical recording medium which comprises a print-receiving layer as the outermost layer on the side opposite to the light incidence side, wherein a pattern is formed on the print-receiving layer.

Optical recording medium having a pattern

Optical recording medium having a print receiving layer and pattern

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Tokyo, Japan

Hideharu Takeshima