Optical information recording carrier

Abstract

The present invention provides an optical information recording medium with good recording characteristics by suppressing the deterioration of the recording layer in the manufacturing process. A spiral initial groove is formed in a predetermined area except the peripheral portion of the central hole of the disc-shaped substrate 12 having a thickness of 1.0 to 1.2mm and the outer peripheral portion of the substrate 12, and the initial groove is formed on the area of ​​the substrate 12. A light reflection layer 14 and a recording layer 16 capable of recording information by laser light with a wavelength of 380 nm to 500 nm are laminated in this order. In addition, on the recording layer 16, that is, on the surface of the magnetic disk opposite to the substrate 12, a protective layer 18 for protecting the recording layer is provided. The agent layer 20 is provided with a transparent film protective layer 22 .

Description

technical field [0001] The present invention relates to an optical information recording medium, especially an optical information recording medium in which information is recorded and reproduced by irradiating laser light from one side of the film protective layer. Background technique [0002] Conventionally, a write-once optical information recording medium (optical disc) in which information can only be recorded once by laser is known as CD-R. A typical structure of this CD-R type optical information recording medium is that a dye recording layer made of an organic dye, a light reflection layer made of a metal such as gold, and a resin protective layer are sequentially laminated on a transparent disk-shaped substrate. And the information recording of this optical disc is carried out by irradiating the laser light of the near-infrared region to the optical disc (usually the laser light of wavelength near 780nm). , generation of pits, etc.) its partial optical characteris...

AI Technical Summary

Problems solved by technology

That is to say, in the structure of the short-wavelength optical information recording medium, there is a problem that the recording material contained in the recording layer is partially deteriorated during manufacture, and the recording characteristics are lowered.

In particular, in the case of a recording layer containing a pigment, the absorption of the pigment contained in the recording layer extends to the short wavelength side of 400nm, and the pigment is easily decomposed by absorbing ultraviolet rays, which shows serious deterioration.

[0006] On the other hand, in Japanese Patent Laid-Open No. 11-27314, it is proposed that a transparent film is pasted on a substrate through a pressure-sensitive adhesive sheet or a dry photographic polymer sheet, and a light-transmitting film protection is formed without irradiating ultraviolet rays. layer optical information recording medium, but when the transparent film is pasted on the substrate through a pressure-sensitive adhesive sheet, etc., bubbles are generated between the transparent film and the substrate, and the problem of insufficient adhesion occurs.

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