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US 2023/0028064 A1Published application
Light-absorbing material, recording medium using the same, information recording method and information reading method
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsMASAKO YOKOYAMA, NAOYA SAKATA, KENJI TAGASHIRA, KOTA ANDO
Life of this patent
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Abstract
A light-absorbing material includes a compound represented by the formula (1) below. In the formula (1), L1 to L3 are each independently represented by the formula (2) or (3) below:
Claims17
A light-absorbing material comprising a compound represented by the following formula (1):
- wherein R1 to R15 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br, and L1 to L3 are each independently represented by the following formula (2) or (3):
- wherein R16 to R19 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br, and n is an integer of 1 to 3,
- wherein R20 to R23 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br, and m is an integer of 1 to 3,
- when the compound is represented by the formula (4) below, at least one selected from the group consisting of R1, R6 and R11 is a halogen atom, an alkyl group, an alkyl halide group, an unsaturated hydrocarbon group, a hydroxyl group, a carboxyl group, an alkoxycarbonyl group, an acyl group, an amide group, an acyloxy group, a thiol group, an alkylthio group, a sulfonic acid group, an acylthio group, an alkylsulfonyl group, a sulfonamide group, a primary amino group or a secondary amino group,
1 more element
A light-absorbing material used in a device utilizing light having a wavelength of greater than or equal to 390 nm and less than or equal to 420 nm,
- the light-absorbing material comprising a compound represented by the following formula (1):
- wherein R1 to R15 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br, and L1 to L3 are each independently represented by the following formula (2) or (3):
- wherein R16 to R19 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br, and n is an integer of 1 to 3,
- wherein R20 to R23 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br, and m is an integer of 1 to 3.
1 more element
A recording medium comprising a recording film containing a light-absorbing material containing a compound represented by the following formula (1):
- wherein R1 to R15 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br, and L1 to L3 are each independently represented by the following formula (2) or (3):
- wherein R16 to R19 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br, and n is an integer of 1 to 3,
- wherein R20 to R23 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br, and m is an integer of 1 to 3.
An information recording method comprising:
- providing a light source that emits light having a wavelength of greater than or equal to 390 nm and less than or equal to 420 nm;
- and
- focusing the light from the light source with a lens and applying the light to a recording region in a recording medium including a recording film containing a light- absorbing material containing a compound represented by the following formula (1):
- wherein R1 to R15 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br, and L1 to L3 are each independently represented by the following formula (2) or (3):
- wherein R16 to R19 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br, and n is an integer of 1 to 3,
- wherein R20 to R23 each independently include at least one atom selected from the group consisting of H, C, N, O, F, P, S, Cl, I and Br, and m is an integer of 1 to 3.
3 more elements
Dependencies are inferred from the claim text.