Optical carrier
A technology for recording media and optical information, applied in the directions of optical record carriers, record carrier types, record carrier materials, etc., and can solve the problems that recording materials cannot be recorded and reproduced.
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Embodiment 1
[0061] Through the injection molding method, a polycarbonate with a thickness of 0.6mm and an outer diameter (diameter) of 120mm formed on the surface with a spiral groove of a width of 0.32μm, a depth of 100nm, and a track pitch of 0.74μm is made transparent. substrate.
[0062] Next, trimethine cyanine dye NK-4285 (n=2.70, k=0.41 at a wavelength of 635 nm) represented by the following [Chem. Cyan dye NK-4270 (n=2.41, k=0.01 at a wavelength of 635 nm) (manufactured by Japan Photochrome Research Institute) was mixed in a weight ratio of 25:75, and the mixture was dissolved in 2,2,3,3-tetrafluoro-1 - In propanol (manufactured by Tokyo Chemical Industry Co., Ltd., hereinafter abbreviated as TEP), the mixture accounts for 3% by weight, and the above solution is coated on the surface of the substrate by the spin coating method, and the light interference is formed by a photosensitive pigment film with a film thickness of 110 nm. layer.
[0063]
[0064] [chemical 10]
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Embodiment 2
[0079] Except that the Au in embodiment 1 is replaced by Al for sputtering, except that the Al film with a thickness of 80nm forms a reflective layer, other steps are all the same as in embodiment 1, and a CD is made, which is carried out in the same manner as in embodiment 1 records, and the results are shown in Table 1.
[0080] The optical disc of embodiment 2 is only different from the optical disc of embodiment 1 in the material of the reflective layer. It can be recorded by a laser with a wavelength of 635nm, and can also be reproduced by a laser with a wavelength of 650nm, and the information instability does not increase. High, push-pull, modulation rate, reflectivity and other performances are not worse than that of Example 1.
Embodiment 3
[0082] Trimethine cyanine dye NK-4321 (manufactured by Japan Photochrome Laboratories) represented by the following [Chem. 12] was dissolved in TEP solvent so that NK-4321 accounted for 3% by weight. The above solution was coated on the surface of the substrate by spin coating, and a light interference layer was formed from a photosensitive pigment film with a film thickness of 90 nm.
[0083]
[0084] [chemical 12]
[0085] The maximum absorption wavelength (maximum absorption peak wavelength) of the light interference layer and the optical coefficient of laser light with a wavelength of 635 nm were measured by the same method as in Example 1. The results are shown in Table 1. Utilize the absorption spectrum that the method same method as embodiment 1 records by Figure 5 The solid line in represents. From Figure 5 It can be seen that the above light interference layer has a maximum absorption wavelength and a second maximum absorption peak wavelength at 500-655 nm.
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Abstract
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