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US 12,630,656 B2Granted
Infrared cut-off filter, solid-state image sensor filter, solid-state image sensor, and method for producing solid-state image sensor filter
AssigneeToppan Inc.
InventorsReiko Iwata, Yuri Nagai, Hanae Tagami, Shigeki Furukawa
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Abstract
An infrared cut-off filter, including a cyanine dye and a copolymer. The cyanine dye includes tris(pentafluoroethyl) trifluorophosphate and a cation having a polymethine and a nitrogen-containing heterocycle at each end of the polymethine. The copolymer includes a first repeating unit from a first monomer and a second repeating unit from a second monomer different from the first monomer. The first monomer includes a phenolic hydroxyl group.
Claims19
An infrared cut-off filter, comprising:
- a film comprising a cyanine dye and a copolymer,
- wherein the cyanine dye includes tris (pentafluoroethyl) trifluorophosphate and a cation having a polymethine and a nitrogen-containing heterocycle at each end of the polymethine,
- the copolymer includes a first repeating unit from a first monomer and a second repeating unit from a second monomer different from the first monomer,
- the first monomer includes a phenolic hydroxyl group, and
- the copolymer has a glass transition temperature of 75° C. or higher.
2 more elements
An infrared cut-off filter, comprising:
- a film comprising a cyanine dye and a copolymer,
- wherein the cyanine dye includes tris(pentafluoroethyl) trifluorophosphate and a cation having a polymethine and a nitrogen-containing heterocycle at each end of the polymethine,
- the copolymer consists of a first repeating unit from a first monomer and a second repeating unit from a second monomer different from the first monomer,
- the first monomer includes a phenolic hydroxyl group, and
- the copolymer includes 5 wt. %-30 wt. % of the first repeating unit.
2 more elements
An infrared cut-off filter, comprising:
- a film comprising a cyanine dye and a copolymer,
- wherein the cyanine dye includes tris (pentafluoroethyl) trifluorophosphate and a cation having a polymethine and a nitrogen-containing heterocycle at each end of the polymethine,
- the copolymer includes a first repeating unit from a first monomer, a second repeating unit from a second monomer different from the first monomer, and a third repeating unit from glycidyl methacrylate, and
- the first monomer includes a phenolic hydroxyl group.
1 more element
An infrared cut-off filter, comprising:
- a film comprising a cyanine dye and a copolymer,
- wherein the cyanine dye includes tris(pentafluoroethyl) trifluorophosphate and a cation having a polymethine and a nitrogen-containing heterocycle at each end of the polymethine,
- the copolymer includes a first repeating unit from a first monomer and a second repeating unit from a second monomer different from the first monomer, and
- the first monomer includes a phenolic hydroxyl group,
- wherein the film includes a monomer remaining in the film at a weight percentage of 20% or less with respect to a sum of a weight of the copolymer and a weight of the monomer, which is represented by
- (MM/MS)×100≤20%
- where MM is the weight of the monomer, and MS is the sum of the weight of the copolymer and the weight of the monomer.
4 more elements
Dependencies are inferred from the claim text.