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Optical recording materials and optical recording media

An optical recording medium and optical recording technology, applied in the direction of optical record carrier, record carrier material, temperature recording method, etc., can solve the problem of short wavelength of reproduced light, and achieve the effect of satisfying sensitivity and beating requirements, high recording speed, and restraining beating

Inactive Publication Date: 2005-11-02
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, widely popularized optical recording media include CD-R (additional CD), DVD-R (additional DVD) and other optical recording discs, but in order to make the recording density higher, the wavelength of the recording and reproduction light has become increasingly shorter

Method used

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  • Optical recording materials and optical recording media
  • Optical recording materials and optical recording media
  • Optical recording materials and optical recording media

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] On the one hand, on a polycarbonate resin substrate with a depth of 0.16 μm, a width of 0.30 μm, and a groove pitch of 0.74 μm, the trimethylcyanine pigment formed with the trimethylcyanine pigment cation and its counter anion and A chelate compound, an optical recording material prepared by mixing the combinations and ratios shown in Table 17, is dissolved in 2,2,3,3-tetrafluoropropanol at a ratio of 1.0% by weight to form a mixed solution , coated on a polycarbonate resin substrate, dried to form a recording layer (thickness 130nm). Then, an Ag reflective layer (thickness 85 nm) was formed on the recording layer by sputtering, and a transparent protective layer (thickness 5 μm) made of ultraviolet curable acrylic resin was formed on the Ag reflective layer to obtain a laminated structure. Then, these two laminated structures are bonded together with an adhesive so that their respective protective layers are on the inside to form a figure 2 The optical recording disc...

Embodiment 2～22 and comparative example 1～7

[0111] The preparation and evaluation of optical recording discs were carried out in the same manner as in Example 1, except that materials mixed in combinations and ratios shown in Table 17 were used. In addition, the Nos. of the trimethylcyanine dye cation and the chelate compound used in the optical recording material are those shown in Tables 1 to 6 and Tables 7 to 12 and their corresponding chemical structural formulas, respectively. in PF 6 - is the counter anion of the trimethylcyanine pigment cation, with Na + It is the balance cation of the chelate. Table 18 with " * 1" or " * The example of 2" indicates that an optical recording material was prepared by using a salt (integrated salt) of a trimethylcyanine dye cation and a chelate complex as follows. In addition, in Comparative Examples 5, 6, and 7, trimethylcyanine was used. The cyanine pigment cation is R in the formula (1a) 1 , R 2 , R 3 , R 4 Comparative compounds A and B represented by the following form...

Embodiment 23

[0119] On the one hand, a polycarbonate resin substrate with a depth of 0.16 μm, a width of 0.30 μm, and a groove pitch of 0.74 μm is formed on a polycarbonate resin substrate. 6 - The formed trimethylcyanine dye and additives were mixed according to the combinations shown in Table 19, and the content ratio of the additive compound was prepared at a ratio of 10% by weight based on the entire optical recording material, and the content was adjusted to 1.0 It was dissolved in 2,2,3,3-tetrafluoropropanol at a weight % ratio to form a mixed liquid, coated on a polycarbonate resin substrate, and dried to form a recording layer (thickness: 130 nm). Then, an Ag reflective layer (thickness 85 nm) was formed on the recording layer by sputtering, and a transparent protective layer (thickness 5 μm) made of ultraviolet curable acrylic resin was formed on the Ag reflective layer to obtain a laminated structure. Then, these two laminated structures are bonded together with an adhesive so t...

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Abstract

This optical recording material is used for an optical recording medium, which can record information by being irradiated with light and includes a cation represented by general formula (1a), wherein R1, R2, R3, R4, R5 and R6 independently and respectively represent a 1-4C alkyl group or the like, R7represents a hydrogen atom or the like, Q1 and Q2 independently and respectively represent an atomic group comprising a benzen ring or the like provided that at least one among R1, R2, R3 and R4 represents a group, which is not a methyl group, and a chelate compound of an azo compound and a metal under the condition that the containing percentage of the chelate compound is 10-70 mol% on the total amount of the cation and the chelate compound.

Description

technical field [0001] The present invention relates to an optical recording medium for recording information by using light, and an optical recording material used for the optical recording medium. Background technique [0002] At present, widely popularized optical recording media include CD-R (additional CD), DVD-R (additional DVD) and other optical recording discs, but in order to make the recording density higher, the wavelength of the recording and reproduction light has become increasingly shorter. For example, the current recording and reproducing wavelength of CD-R is 780nm, and the wavelength of next-generation CD-R and DVD-R is shortened to 635nm~680nm. Pigments used in optical recording media corresponding to this short-wavelength light have been known so far, including cyanine dyes (see JP-A-11-34499 A), and azo compounds called "metal-containing azocyanine dyes". Pigments such as cyanine pigments formed with metal chelates (see JP-A-9-323478). Contents of t...

Claims

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Application Information

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IPC IPC(8): B41M5/26G11B7/24G11B7/244
Inventor 田辺顺志门田敦志新海正博
Owner TDK CORPARATION
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