Nano-structure based system and method for charging a photoconductive surface

• US 7,002,609 B2
• Filed: 11/07/2002
• Issued: 02/21/2006
• Est. Priority Date: 11/07/2002
• Status: Expired due to Fees

• Current Assignee: Brother International Corporation (Brother Industries Limited)
• Original Assignee: Brother International Corporation (Brother Industries Limited)
• Inventors: Lewis, Howard
• Primary Examiner(s): Tran, Huan
• Application Number:
  US10/289,939
• Publication Number:
  US 20040091285A1
• Time in Patent Office: 1,202 Days
• Field of Search: 347/129, 347/238
• US Class Current: 347/129
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: G03G 15/328 using a CRT
• CPC Class Codes: Y10S 977/932 for electronic or optoelectronic application

Abstract

A system for charging a photoconductive surface being suitable use in forming an image on a substrate, the system including: an at least partial vacuum chamber; at least one nanostructure being disposed within the vacuum chamber and suitable for emitting electrons; and, at least one cap disposed with respect to the at least one nanostructure such that electrons emitted from the at least one nanostructure and colliding with the cap cause radiation suitable for charging the photoconductive surface.

Claims

1. A system for charging a photoconductive surface being suitable for use in forming an image on a substrate, said system comprising:

an at least partial vacuum chamber;

at least one nanostructure being disposed within said vacuum chamber and suitable for emitting electrons; and

,

at least one cap disposed with respect to said at least one nanostructure such that electrons emitted from said at least one nanostructure and colliding with said cap to emit radiation suitable for charging at least one portion of said photoconductive surface.

2. The system of claim 1, further comprising at least one cathode disposed within said chamber, wherein said at least one nanostructure is operatively coupled to said at least one cathode.

3. The system of claim 2, further comprising at least one anode being disposed with respect to said cathode and cap so as to accelerate electrons emitted from said at least one nanostructure towards said cap.

4. The system of claim 3, further comprising at least one gate electrode positioned with respect to said anode and cathode to control at least acceleration of said emitted electrons.

5. The system of claim 4, further comprising at least one substrate supporting said chamber, at least one nanostructure, cap, anode and cathode.

6. The system of claim 5, wherein said substrate comprises at least one of silicon material and amorphous silicon material.

7. The system of claim 6, wherein said at least one gate electrode comprises a conductive material.

8. The system of claim 7, further comprising at least one insulating material interposed between said anode and cathode.

9. The system of claim 8, wherein said insulating material at least partially defines said cavity.

10. The system of claim 8, wherein said insulating material comprises at least one of an amorphous silicon material and amorphous silicon dioxide material.

11. The system of claim 7, wherein said cap comprises at least one metallic material.

12. The system of claim 11, wherein said at least one metallic material comprises copper.

13. The system of claim 7, wherein said cap comprises at least one non-metallic material.

14. The system of claim 13, wherein said at least one non-metallic material comprises glass.

15. The system of claim 3, wherein said anode comprises a mesh anode.

16. The system of claim 3, wherein said anode comprises at least one anode gating electrode.

17. The system of claim 1, wherein said at least one nanostructure comprises at least one nanotube.

18. The system of claim 1, wherein said at least one nanostructure comprises a film including nanotubes.

19. The system of claim 1, wherein said at least one nanostructure comprises a plurality of vertically aligned carbon nanotubes.

20. The system of claim 1, wherein said at least one nanostructure comprises at least one array of nanotubes.

21. The system of claim 1, wherein said at least one nanostructure comprises at least one carbon single-wall nanotube.

22. The system of claim 1, wherein said at least one nanostructure comprises at least one array of carbon single-wall nanotubes.

23. The system of claim 1, wherein said at least one nanostructure comprises at least one regular array of nanotubes.

24. The system of claim 1, wherein said at least one nanostructure comprises at least one regular array of carbon single-wall nanotubes.

25. The system of claim 22, further comprising at least one controller operatively coupled to at least one of said anode, cathode and at least one gating electrode, and being suitable for receiving information being indicative of said image to be formed on said substrate and selectively causing said at least one nanostructure to emit said electrons responsively to said received information.

26. The system of claim 1, wherein said radiation comprises ultraviolet radiation.

27. A method for charging a photoconductive surface being suitable for use in forming an image on a substrate, the method comprising the steps of:

receiving information being indicative of said image to be formed on said substrate; and

,

selectively inducing at least one of a plurality of nanostructures being disposed within a vacuum chamber to emit electrons that cause electromagnetic radiation to impinge upon said photoconductive surface thereby creating an electrostatic representation of said image to be formed on said substrate on said photoconductive surface depending upon said received information.

28. The method of claim 27, further comprising activating at least one cathode and anode so as to accelerate said electrons.

29. The method of claim 27, wherein said selective inducing comprises selectively activating at least one gating electrode.

30. The method of claim 27, wherein said emitted electrons collide with at least one cap to cause said electromagnetic radiation.

31. The method of claim 27, wherein said at least one nanostructure comprises at least one nanotube.

32. The method of claim 27, wherein said at least one nanostructure comprises a film including nanotubes.

33. The method of claim 27, wherein said at least one nanostructure comprises a plurality of vertically aligned carbon nanotubes.

34. The method of claim 27, wherein said at least one nanostructure comprises at least one array of nanotubes.

35. The method of claim 27, wherein said at least one nanostructure comprises at least one carbon single-wall nanotube.

36. The method of claim 27, wherein said at least one nanostructure comprises at least one array of carbon single-wall nanotubes.

37. The method of claim 27, wherein said at least one nanostructure comprises at least one regular array of nanotubes.

38. The method of claim 27, wherein said at least one nanostructure comprises at least one regular array of carbon single-wall nanotubes.

39. The method of claim 27, wherein said radiation comprises ultraviolet radiation.

40. A controller for charging a photoconductive surface being suitable for use in forming an image on a substrate, said controller comprising a computer program product being embodied in a tangible medium, said computer program product comprising:

code for receiving information being indicative of said image to be formed on said substrate; and

,

code for selectively inducing at least one of a plurality of nanostructures being disposed within a vacuum chamber to emit electrons that cause electromagnetic radiation to impinge upon said photoconductive surface thereby creating an electrostatic representation of said image to be formed on said substrate on said photoconductive surface depending upon said received information.

41. The controller of claim 40, further comprising code for activating at least one cathode and anode so as to accelerate said electrons.

42. The controller of claim 40, wherein said selective inducing comprises selectively activating at least one gating electrode.

43. The controller of claim 40, wherein said emitted electrons collide with at least one cap to cause said electromagnetic radiation.

44. The controller of claim 40, wherein said at least one nanostructure comprises at least one nanotube.

45. The controller of claim 40, wherein said at least one nanostructure comprises a film including nanotubes.

46. The controller of claim 40, wherein said at least one nanostructure comprises a plurality of vertically aligned carbon nanotubes.

47. The controller of claim 40, wherein said at least one nanostructure comprises at least one array of nanotubes.

48. The controller of claim 40, wherein said at least one nanostructure comprises at least one carbon single-wall nanotube.

49. The controller of claim 40, wherein said at least one nanostructure comprises at least one array of carbon single-wall nanotubes.

50. The controller of claim 40, wherein said at least one nanostructure comprises at least one regular array of nanotubes.

51. The controller of claim 40, wherein said at least one nanostructure comprises at least one regular array of carbon single-wall nanotubes.

52. The controller of claim 40, wherein said radiation comprises ultraviolet radiation.

53. A system for forming an image on a substrate, said system comprising:

at least one photoconductive surface;

an at least partial vacuum chamber;

at least one nanostructure being disposed within said vacuum chamber and suitable for emitting electrons; and

,

at least one cap disposed with respect to said at least one nanostructure such that electrons emitted from said at least one nanostructure and colliding with said cap cause radiation suitable for charging at least one portion of said photoconductive surface with an electrostatic image of said image to be formed on said substrate.

54. The system of claim 53, further comprising toner being suitable for adhering to said latent image and then transferred to said substrate.

55. The system of claim 53, further comprising at least one cathode disposed within said chamber, wherein said at least one nanostructure is operatively coupled to said at least one cathode.

56. The system of claim 55, further comprising at least one anode being disposed with respect to said cathode and cap so as to accelerate electrons emitted from said at least one nanostructure towards said cap.

57. The system of claim 55, wherein said cap is adapted to serve as an anode for accelerating electrons emitted from said at least one nanostructure.

58. The system of claim 56, further comprising at least one gate electrode positioned with respect to said anode and cathode to control at least acceleration of said emitted electrons.

59. The system of claim 58, further comprising at least one substrate supporting said chamber, at least one nanostructure, cap, anode and cathode.

60. The system of claim 59, wherein said substrate comprises at least one of silicon material and amorphous silicon material.

61. The system of claim 60, wherein said at least one gate electrode comprises a conductive material.

62. The system of claim 61, further comprising at least one insulating material interposed between said anode and cathode.

63. The system of claim 62, wherein said insulating material at least partially defines said cavity.

64. The system of claim 63, wherein said insulating material comprises at least one of an amorphous silicon material and amorphous silicon dioxide material.

65. The system of claim 59, wherein said cap comprises at least one metallic material.

66. The system of claim 65, wherein said at least one metallic material comprises copper.

67. The system of claim 59, wherein said cap comprises at least one non-metallic material.

68. The system of claim 67, wherein said at least one non-metallic material comprises glass.

69. The system of claim 59, wherein said anode comprises a mesh anode.

70. The system of claim 59, wherein said anode comprises at least one anode gating electrode.

71. The system of claim 53, wherein said at least one nanostructure comprises at least one nanotube.

72. The system of claim 53, wherein said at least one nanostructure comprises a film including nanotubes.

73. The system of claim 53, wherein said at least one nanostructure comprises a plurality of vertically aligned carbon nanotubes.

74. The system of claim 53, wherein said at least one nanostructure comprises at least one array of nanotubes.

75. The system of claim 53, wherein said at least one nanostructure comprises at least one carbon single-wall nanotube.

76. The system of claim 53, wherein said at least one nanostructure comprises at least one array of carbon single-wall nanotubes.

77. The system of claim 53, wherein said at least one nanostructure comprises at least one regular array of nanotubes.

78. The system of claim 53, wherein said at least one nanostructure comprises at least one regular array of carbon single-wall nanotubes.

79. The system of claim 53, further comprising at least one controller operatively coupled to at least one of said anode, cathode and at least one gating electrode, and being suitable for receiving information being indicative of said image to be formed on said substrate and selectively causing said at least one nanostructure to emit said electrons responsively to said received information.

80. The system of claim 53, wherein said radiation comprises ultraviolet radiation.