Optical information recording medium

• US 20060068326A1
• Filed: 07/15/2004
• Published: 03/30/2006
• Est. Priority Date: 07/16/2003
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Mikoshiba, Hisashi, Watanabe, Tetsuya, Katayama, Kazutoshi
• Granted Patent: US 7,491,486 B2
• Time in Patent Office: Days
• US Class Current: 430/270.110
• CPC Class Codes: G11B 2007/25706 containing transition metal elements (Zn, Fe, Co, Ni, Pt)
• CPC Class Codes: G11B 2007/2571 containing group 14 elements except carbon (Si, Ge, Sn, Pb)
• CPC Class Codes: G11B 2007/25715 containing oxygen
• CPC Class Codes: G11B 2007/25716 containing sulfur
• CPC Class Codes: G11B 7/245 containing a polymeric component
• CPC Class Codes: G11B 7/246 containing dyes
• CPC Class Codes: G11B 7/2467 azo-dyes
• CPC Class Codes: G11B 7/247 methine or polymethine dyes
• CPC Class Codes: G11B 7/2472 cyanine
• CPC Class Codes: G11B 7/2475 merocyanine
• CPC Class Codes: G11B 7/2478 oxonol
• CPC Class Codes: G11B 7/248 porphines; azaporphines, e.g. phthalocyanines
• CPC Class Codes: G11B 7/249 containing organometallic compounds G11B7/246 takes precedence
• CPC Class Codes: G11B 7/2531 comprising glass
• CPC Class Codes: G11B 7/2533 comprising resins
• CPC Class Codes: G11B 7/2534 polycarbonates [PC]
• CPC Class Codes: G11B 7/2535 polyesters, e.g. PET, PETG or PEN
• CPC Class Codes: G11B 7/256 of layers improving adhesion between layers
• CPC Class Codes: G11B 7/259 based on silver

Abstract

The present invention provides an optical information recording medium comprising a substrate having provided thereon a recording layer in which information can be recorded by laser light irradiation, wherein the recording layer contains a dye represented by the following formula (I):
Formula (I)

wherein Dye represents a dye residue having an absorption as high as 10000 (cm⁻¹·mol⁻¹) or more as a molar extinction coefficient for light having a wavelength of 450 nm to 900 nm; L represents a divalent connecting group or a single bond; UV represents a dye residue having an absorption as high as 10000 (cm⁻¹·mol⁻¹) or more as a molar extinction coefficient for light having a wavelength of 280 nm to 450 nm; and m denotes an integer from 1 to 8.

Claims

1. An optical information recording medium comprising a substrate having provided thereon a recording layer in which information can be recorded by laser light irradiation,

wherein the recording layer contains a dye represented by the following formula (I):

Formula (I)

wherein Dye represents a dye residue having an absorption as high as 10000 (cm<sup>−

1</sup>·

mol<sup>−

1</sup>) or more as a molar extinction coefficient for light having a wavelength of 450 nm to 900 nm;

L represents a divalent connecting group or a single bond;

UV represents a dye residue having an absorption as high as 10000 (cm<sup>−

1</sup>·

mol<sup>−

1</sup>) or more as a molar extinction coefficient for light having a wavelength of 280 nm to 450 nm; and

m denotes an integer from 1 to 8.

2. The optical information recording medium of claim 1, wherein the maximum absorption wavelength of Dye in the dye represented by formula (I) is 450 nm to 900 nm.

3. The optical information recording medium of claim 1, wherein the maximum absorption wavelength of UV in the dye represented by formula (I) is 280 nm or more and less than 450 nm.

4. The optical information recording medium of claim 1, wherein Dye in formula (I) is a dye residue selected from the group consisting of an azo dye, a large ring dye, an anthraquinone dye, a methine dye and an azomethine dye.

5. The optical information recording medium of claim 1, wherein UV in formula (I) is a dye residue selected from the group consisting of a methine dye, a benzotriazole dye, a benzophenone dye and a triazine dye.

6. The optical information recording medium of claim 1, wherein the medium is produced by applying with a spin-coating method a coating solution containing the dye represented by formula (I) and an organic solvent.

7. The optical information recording medium of claim 1, wherein in the dye represented by formula (I), Dye has a structure represented by the following formula (II) and UV has a structure represented by the following formula (A):

A-N═

N—

B 

 

Formula (II)

Wherein in formula (II), A and B respectively represent an aromatic ring or a hetero ring;

Formula (A)

wherein in formula (A), R¹, R², R³ and R⁴ respectively represent a substituent; and

n denotes an integer from 0 to 5, and when n is 2 or more, multiple R¹s may be the same or different;

wherein the bond on the left side of L is bound with A or B in formula (II) and the bond on the right side of L is bound with the benzene ring or any one of R¹, R¹, R³ and R⁴ in formula (A); and

when L is bound with A, B, R¹, R², R³ or R⁴, A, B, R¹, R², R³ or R⁴ with which L is bound represents a divalent group.

8. The optical information recording medium of claim 7, wherein A in formula (II) is represented by any one of the following formulae:

9. The optical information recording medium of claim 7, wherein B in formula (II) is represented by any one of the following structures:

10. The optical information recording medium of claim 1, wherein Dye in formula (I) is represented by the following formula (α

);

Formula (α

)

11. The optical information recording medium of claim 1, wherein Dye in formula (I) is represented by the following formula (β

);

Formula (β

)

12. The optical information recording medium of claim 1, wherein UV in formula (I) is represented by the following formula (A):

Formula (A)

13. The optical information recording medium of claim 1, wherein UV in formula (I) is represented by the following formula (B):

Formula (B)

14. The optical information recording medium of claim 1, wherein UV in formula (I) is represented by the following formula (C):

Formula (C)

15. The optical information recording medium of claim 1, wherein UV in formula (I) is represented by the following formula (D):

Formula (D)

16. The optical information recording medium of claim 1, wherein UV in formula (I) is represented by the following formula (E):

Formula (E)

17. The optical information recording medium of claim 1, wherein UV in formula (I) is represented by the following formula (Fe):

Formula (F)

18. The optical information recording medium of claim 1, wherein UV in formula (I) is represented by the following formula (G):

Formula (G)