Storage phosphor screen having binderless colored layers

• US 20030183777A1
• Filed: 02/19/2003
• Published: 10/02/2003
• Est. Priority Date: 03/26/2002
• Status: Active Grant

• Current Assignee: AGFA Healthcare NV (Agfa-Gevaert N.V.)
• Original Assignee: Agfa-Gevaert N.V.
• Inventors: Struye, Luc, Leblans, Paul
• Granted Patent: US 6,977,385 B2
• Time in Patent Office: Days
• US Class Current: 250/484.4
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• CPC Class Codes: C09K 11/7733 with alkali or alkaline earth metals
• CPC Class Codes: G21K 2004/06 with a phosphor layer
• CPC Class Codes: G21K 2004/10 with a protective film
• CPC Class Codes: G21K 2004/12 with a support
• CPC Class Codes: G21K 4/00 Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens photographic processes using X-ray intensifiers G03C5/17; discharge tubes comprising luminescent screens H01J1/62; cathode ray tubes for X-ray conversion with optical output H01J31/50

Abstract

A layer arrangement comprising, at least in a binderless layer thereof, one or more vapor deposited pigments like the preferred nanocrystalline β-Cu-phthalocyanine nanocrystalline dye compound has been disclosed, wherein said layer layer arrangement is, in a preferred embodiment a photostimulable phosphor plate or panel having a binderless needle-shaped photostimulable alkali metal phosphor, and, more preferably, a CsBr:Eu²⁺ phosphor, showing besides a high image definition, an excellent preservation of color stability; and wherein the thus produced binderless photostimulable phosphor screen is overcoated with a strong protective layer in order to provide ability for easy transport through a scanning module, without jamming, in a diagnostic radiographic image reading system.

Claims

1. A layer arrangement on a substrate characterized in that at least one nanocrystalline dye compound is present in at least one binderless layer on the said substrate.

2. A layer arrangement according to claim 1, wherein said layer having at least one nanocrystalline dye compound further comprises colloidal silica.

3. A layer arrangement according to claim 1, wherein said dye compound is a copper complex of a cyanine dye.

4. A layer arrangement according to claim 2, wherein said dye compound is a copper complex of a cyanine dye.

5. A layer or layer arrangement according to claim 3, wherein said dye compound is β

-Cu-phthalocyanine.

6. A layer or layer arrangement according to claim 4, wherein said dye compound is β

-Cu-phthalocyanine.

7. Layer arrangement according to claim 1, representing a photostimulable phosphor screen having a binderless vapor deposited phosphor layer on the substrate, characterized in that at least one nanocrystalline dye compound is present in at least the said binderless phosphor layer on the said substrate.

8. Layer arrangement according to claim 1, representing a photostimulable phosphor screen having a support and a binderless vapor deposited photostimulable phosphor layer with phosphor needles and voids between said needles, characterized in that said voids between said needles are partially filled with the said nanocrystalline dye.

9. Layer arrangement according to claim 2, representing a photostimulable phosphor screen having a binderless vapor deposited phosphor layer on the substrate, characterized in that at least one nanocrystalline dye compound is present in at least the said binderless phosphor layer on the said substrate.

10. Layer arrangement according to claim 2, representing a photostimulable phosphor screen having a support and a binderless vapor deposited photostimulable phosphor layer with phosphor needles and voids between said needles, characterized in that said voids between said needles are partially filled with the said nanocrystalline dye.

11. Layer arrangement according to claim 5, representing a photostimulable phosphor screen having a binderless vapor deposited phosphor layer on the substrate, characterized in that at least one nanocrystalline dye compound is present in at least the said binderless phosphor layer on the said substrate.

12. Layer arrangement according to claim 6, representing a photostimulable phosphor screen having a binderless vapor deposited phosphor layer on the substrate, characterized in that at least one nanocrystalline dye compound is present in at least the said binderless phosphor layer on the said substrate.

13. Layer arrangement according to claim 5, representing a photostimulable phosphor screen having a support and a binderless vapor deposited photostimulable phosphor layer with phosphor needles and voids between said needles, characterized in that said voids between said needles are partially filled with the said nanocrystalline dye.

14. Layer arrangement according to claim 6, representing a photostimulable phosphor screen having a support and a binderless vapor deposited photostimulable phosphor layer with phosphor needles and voids between said needles, characterized in that said voids between said needles are partially filled with the said nanocrystalline dye.

15. Layer arrangement according to claim 11, wherein said photostimulable phosphor layer is composed of a vapor deposited alkali metal halide phosphor.

16. Layer arrangement according to claim 12, wherein said photostimulable phosphor layer is composed of a vapor deposited alkali metal halide phosphor.

17. Layer arrangement according to claim 13, wherein said photostimulable phosphor layer is composed of a vapor deposited alkali metal halide phosphor.

18. Layer arrangement according to claim 14, wherein said photostimulable phosphor layer is composed of a vapor deposited alkali metal halide phosphor.

19. Layer arrangement according to claim 11, wherein said photostimulable phosphor layer comprises a needle-shaped CsX:

Eu phosphor, wherein X represents a halide selected from the group consisting of Br and Cl.

20. Layer arrangement according to claim 12, wherein said photostimulable phosphor layer comprises a needle-shaped CsX:

Eu phosphor, wherein X represents a halide selected from the group consisting of Br and Cl.

21. Layer arrangement according to claim 13, wherein said photostimulable phosphor layer comprises a needle-shaped CsX:

Eu phosphor, wherein X represents a halide selected from the group consisting of Br and Cl.

22. Layer arrangement according to claim 14, wherein said photostimulable phosphor layer comprises a needle-shaped CsX:

Eu phosphor, wherein X represents a halide selected from the group consisting of Br and Cl.

23. Layer arrangement according to claim 7, wherein said binderless photostimulable phosphor screen is overcoated with a protective layer comprising besides moieties carrying fluor-atoms, polymeric beads or at least one nanocrystalline dye compound or a combination thereof.

24. Layer arrangement according to claim 8, wherein said binderless photostimulable phosphor screen is overcoated with a protective layer comprising besides moieties carrying fluor-atoms, polymeric beads or at least one nanocrystalline dye compound or a combination thereof.

25. Layer arrangement according to claim 9, wherein said binderless photostimulable phosphor screen is overcoated with a protective layer comprising besides moieties carrying fluor-atoms, polymeric beads or at least one nanocrystalline dye compound or a combination thereof.

26. Layer arrangement according to claim 10, wherein said binderless photostimulable phosphor screen is overcoated with a protective layer comprising besides moieties carrying fluor-atoms, polymeric beads or at least one nanocrystalline dye compound or a combination thereof.

27. Layer arrangement according to claim 7, wherein said binderless photostimulable phosphor screen is overcoated with a vacuum deposited protective layer of poly(p-xylylene), poly(p-2-chloroxylylene), poly(p-2,6-dichloroxyly-lene), fluoro substituted poly(p-xyly-lene), MgF₂, or a combination thereof.

28. Layer arrangement according to claim 8, wherein said binderless photostimulable phosphor screen is overcoated with a vacuum deposited protective layer of poly(p-xylylene), poly(p-2-chloroxylylene), poly(p-2,6-dichloroxyly-lene), fluoro substituted poly(p-xyly-lene), MgF₂, or a combination thereof.

29. Layer arrangement according to claim 9, wherein said binderless photostimulable phosphor screen is overcoated with a vacuum deposited protective layer of poly(p-xylylene), poly(p-2-chloroxylylene), poly(p-2,6-dichloroxyly-lene), fluoro substituted poly(p-xyly-lene), MgF₂, or a combination thereof.

30. Layer arrangement according to claim 10, wherein said binderless photostimulable phosphor screen is overcoated with a vacuum deposited protective layer of poly(p-xylylene), poly(p-2-chloroxylylene), poly(p-2,6-dichloroxyly-lene), fluoro substituted poly(p-xyly-lene), MgF₂, or a combination thereof.

31. Layer arrangement according to claim 23, wherein said binderless photostimulable phosphor screen is overcoated with a vacuum deposited protective layer of poly(p-xylylene), poly(p-2-chloroxylylene), poly(p-2,6-dichloroxyly-lene), fluoro substituted poly(p-xyly-lene), MgF₂, or a combination thereof.

32. Layer arrangement according to claim 24, wherein said binderless photostimulable phosphor screen is overcoated with a vacuum deposited protective layer of poly(p-xylylene), poly(p-2-chloroxylylene), poly(p-2,6-dichloroxyly-lene), fluoro substituted poly(p-xyly-lene), MgF₂, or a combination thereof.

33. Layer arrangement according to claim 25, wherein said binderless photostimulable phosphor screen is overcoated with a vacuum deposited protective layer of poly(p-xylylene), poly(p-2-chloroxylylene), poly(p-2,6-dichloroxyly-lene), fluoro substituted poly(p-xyly-lene), MgF₂, or a combination thereof.

34. Layer arrangement according to claim 26, wherein said binderless photostimulable phosphor screen is overcoated with a vacuum deposited protective layer of poly(p-xylylene), poly(p-2-chloroxylylene), poly(p-2,6-dichloroxyly-lene), fluoro substituted poly(p-xyly-lene), MgF₂, or a combination thereof.

35. Layer arrangement according to claim 7, wherein said binderless photostimulable phosphor screen is coated on the said a substrate, wherein said substrate is in contact with a Fibre Optic Plate (FOP).

36. Layer arrangement according to claim 8, wherein said binderless photostimulable phosphor screen is coated on the said a substrate, wherein said substrate is in contact with a Fibre Optic Plate (FOP).

37. Layer arrangement according to claim 9, wherein said binderless photostimulable phosphor screen is coated on the said a substrate, wherein said substrate is in contact with a Fibre Optic Plate (FOP).

38. Layer arrangement according to claim 10, wherein said binderless photostimulable phosphor screen is coated on the said a substrate, wherein said substrate is in contact with a Fibre Optic Plate (FOP).

39. Layer arrangement according to claim 11, wherein said binderless photostimulable phosphor screen is coated on the said a substrate, wherein said substrate is in contact with a Fibre Optic Plate (FOP).

40. Layer arrangement according to claim 12, wherein said binderless photostimulable phosphor screen is coated on the said a substrate, wherein said substrate is in contact with a Fibre Optic Plate (FOP).

41. Layer arrangement according to claim 13, wherein said binderless photostimulable phosphor screen is coated on the said a substrate, wherein said substrate is in contact with a Fibre Optic Plate (FOP).

42. Layer arrangement according to claim 14, wherein said binderless photostimulable phosphor screen is coated on the said a substrate, wherein said substrate is in contact with a Fibre Optic Plate (FOP).

43. A layer arrangement according to claim 1, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

44. A layer arrangement according to claim 2, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

45. A layer arrangement according to claim 3, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

46. A layer arrangement according to claim 4, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

47. A layer arrangement according to claim 5, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

48. A layer arrangement according to claim 6, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

49. A layer arrangement according to claim 7, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

50. A layer arrangement according to claim 8, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

51. A layer arrangement according to claim 9, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

52. A layer arrangement according to claim 10, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

53. A layer arrangement according to claim 11, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

54. A layer arrangement according to claim 12, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

55. A layer arrangement according to claim 13, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or an alloy selected from the group of aluminum, steel, brass and copper.

56. A layer arrangement according to claim 14, wherein said substrate is selected from the group consisting of glass, polyethylene therephthalate, polyethylene naphthalate, polycarbonate, aluminum, Pyrex®

, polymethylacrylate, polymethylmethacrylate, sapphire, zinc selenide, Zerodur®

, a ceramic layer and a metal or

an alloy selected from the group of aluminum, steel, brass and copper.