Micro-fabricated device and method of making

• US 20040147056A1
• Filed: 01/29/2003
• Published: 07/29/2004
• Est. Priority Date: 01/29/2003
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Chen, Chien-Hua, Liebeskind, John, McKinnell, James C.
• Application Number:
  US10/353,332
• Publication Number:
  US 20040147056A1
• Time in Patent Office: Days
• US Class Current: 438/52
• CPC Class Codes: B81B 7/0093 by cooling
• CPC Class Codes: G11B 9/10 using electron beam; Record carriers therefor G11B9/08 takes precedence see provisional also G11B11/03

Abstract

A micro-fabricated device, includes a support structure and a device substrate disposed a distance G from the support structure. The micro-fabricated device further includes one or more thermally isolating structures that have a characteristic length, and the one or more thermally isolating structures is thermally coupled to the device substrate and the support structure. The characteristic length is greater than said distance G.

Claims

1. A micro-fabricated device, comprising

a support structure;

a device substrate disposed a distance G from said support structure; and

at least one thermally isolating structure having a characteristic length, said at least one thermally isolating structure thermally coupled to said device substrate and said support structure, wherein said characteristic length is greater than said distance G.

2. The micro-fabricated device in accordance with claim 1, wherein said at least one thermally isolating structure, further comprises two or more layers formed in a manner minimizing tension in said thermally isolating structure.

3. The micro-fabricated device in accordance with claim 1, wherein said at least one thermally isolating structure, further comprises a cross-sectional area having a substantially uniform thermal coefficient of expansion.

4. The micro-fabricated device in accordance with claim 3, wherein said cross-sectional area, further comprises a uniform composition of matter.

5. The micro-fabricated device in accordance with claim 1, wherein said at least one thermally isolating structure, further comprises a folded structure having at least one fold.

6. The micro-fabricated device in accordance with claim 5, wherein said folded structure, further comprises a first section, a second section, and a folding section, wherein said second section is folded back and substantially parallel to said first section, whereby a U shaped structure is formed.

7. The micro-fabricated device in accordance with claim 1, wherein said at least one thermally isolating structure, further comprises a cross-sectional area that varies.

8. The micro-fabricated device in accordance with claim 1, wherein said at least one thermally isolating structure is thermally coupled to said device substrate at multiple locations.

9. The micro-fabricated device in accordance with claim 1, wherein said at least one thermally isolating structure is thermally coupled to said support structure at multiple locations.

10. The micro-fabricated device in accordance with claim 1, wherein said device substrate, further comprises at least one micro fluidic channel disposed on said device substrate.

11. The micro-fabricated device in accordance with claim 1, wherein said device substrate, further comprises at least one micro electromechanical device disposed on said device substrate.

12. The micro-fabricated device in accordance with claim 1, wherein said at least one thermally isolating structure, further comprises a thickness that varies.

13. The micro-fabricated device in accordance with claim 1, wherein said support structure, further comprises an aperture, and said device substrate is disposed within said aperture forming a substantially planar structure between said support structure and said device substrate.

14. The micro-fabricated device in accordance with claim 13, wherein said support structure, said device substrate, and said at least one thermally isolating structure, are made from the same material.

15. The micro-fabricated device in accordance with claim 14, wherein said substantially planar structure is formed utilizing a material selected from the group consisting of glass, ceramic, silicon, gallium arsenide, germanium, indium phosphide, metals, polymers, and combinations thereof.

16. The micro-fabricated device in accordance with claim 13, wherein said at least one thermally isolating structure, further comprises an annular structure disposed between said device substrate and said support structure.

17. The micro-fabricated device in accordance with claim 1, wherein said device substrate is disposed over said support structure.

18. The micro-fabricated device in accordance with claim 1, wherein said support structure further comprises a support attachment surface including a support attachment surface normal, and wherein said device substrate further comprises a substrate attachment surface including a substrate attachment surface normal, wherein said at least one thermally isolating structure attaches to said device substrate at a first predetermined angle to said substrate attachment surface normal and said at least one thermally isolating structure attaches to said support at a second predetermined angle to said support attachment surface normal.

19. The micro-fabricated device in accordance with claim 1, further comprising at least one active device disposed on said device substrate.

20. The micro-fabricated device in accordance with claim 19, wherein said at least one active device, further comprises at least one transistor.

21. The micro-fabricated device in accordance with claim 1, further comprising at least one electrical trace disposed on said thermally isolating structure.

22. The micro-fabricated device in accordance with claim 1 further comprising at least one electrical trace disposed on said device substrate.

23. The micro-fabricated device in accordance with claim 1, further comprising a package enclosing said device substrate.

24. The micro-fabricated device in accordance with claim 23, wherein said package is sealed at a pressure below atmospheric pressure.

25. The micro-fabricated device in accordance with claim 23, wherein said package, further comprises a vacuum portion and a fluid flow portion.

26. The micro-fabricated device in accordance with claim 23, wherein said package reduces convective thermal transfer from said device substrate.

27. The micro-fabricated device in accordance with claim 23, wherein said package, further comprises a radiation reflecting surface.

28. The micro-fabricated device in accordance with claim 23, wherein said package, further comprises an outer vacuum package enclosing a reflecting surface interposed between a cover and said device substrate.

29. The micro-fabricated device in accordance with claim 23, wherein said package, further comprises a reflector interposed between said device substrate and a cover or a lid.

30. The micro-fabricated device in accordance with claim 29, wherein said reflector further comprises a metal surface.

31. The micro-fabricated device in accordance with claim 23, wherein said package provides fluid flow.

32. A fuel cell comprising at least one micro-fabricated device of claim 1.

33. A micro chemical reactor comprising at least one micro-fabricated device of claim 1.

34. The micro-fabricated device in accordance with claim 1, further comprising a light reflective surface disposed on said device substrate.

35. The micro-fabricated device in accordance with claim 1, further comprising a light absorbing surface disposed on said device substrate.

36. The micro-fabricated device in accordance with claim 1, further comprising a vacuum device disposed on said device substrate.

37. The micro-fabricated device in accordance with claim 36, wherein said vacuum device, further comprises an electron emitter.

38. A storage device, comprising:

at least one micro-fabricated device of claim 37;

and

a storage medium in close proximity to said at least one electronic device, said storage medium having a storage area in one of a plurality of states to represent information stored in that storage area.

39. A computer system, comprising:

a microprocessor;

an electronic device including at least one micro-fabricated device of claim 1 coupled to said microprocessor; and

memory coupled to said microprocessor, said microprocessor operable of executing instructions from said memory to transfer data between said memory and the electronic device.

40. The computer system in accordance with claim 39, wherein said electronic device is a storage device.

41. The computer system in accordance with claim 39, wherein said electronic device is a display device.

42. The computer system in accordance with claim 39, wherein said microprocessor further comprises a micro-fabricated device having:

a support structure;

a device substrate disposed a distance G from said support structure; and

at least one thermally isolating structure having a characteristic length, said at least one thermally isolating structure thermally coupled to said device substrate and said support structure, wherein said characteristic length is greater than said distance G.

43. A micro-fabricated device, comprising:

a device substrate;

means to support said device substrate; and

means to reduce thermal conduction between said device substrate and

said support structure.

44. The micro-fabricated device in accordance with claim 43, wherein said device substrate, said means of support, and said means to thermally isolate are made from the same material.

45. The micro-fabricated device in accordance with claim 43, wherein said device substrate, further comprises means for processing electronic signals.

46. The micro-fabricated device in accordance with claim 43, wherein said device substrate, further comprises means for emitting electrons.

47. The micro-fabricated device in accordance with claim 43, further comprising means for sealing the micro-fabricated device in a package.

48. The micro-fabricated device in accordance with claim 47, wherein said package further comprises means for reducing thermal transfer by convection from or to said device substrate.

49. The micro-fabricated device in accordance with claim 47, wherein said package further comprises means for reducing radiation thermal transfer from or to said substrate.

50. The micro-fabricated device in accordance with claim 49, wherein said means for reducing radiation further comprises means for reflecting radiation emitted from or to said substrate.

51. The micro-fabricated device in accordance with claim 47, wherein said package operates is at a pressure less than atmospheric pressure.

52. The micro-fabricated device in accordance with claim 47, wherein said package further comprises means for separating said package into a vacuum portion and a fluid flow portion.

53. A micro-fabricated device, comprising

a support structure having an aperture;

a device substrate disposed in said aperture a distance G from said support structure; and

at least one thermally isolating structure comprising;

a thermal conduction path greater than said distance G, and

a folded structure having;

a first section,

a second section, and

a folding section, wherein said second section is folded back

and substantially parallel to said first section, whereby a U shaped

structure is formed,

wherein said at least one thermally isolating structure thermally couples to said device substrate and said support structure.

54. A method of manufacturing a micro-fabricated device, comprising:

forming a support structure;

defining a device substrate disposed a distance G from said support structure; and

forming at least one thermally isolating structure, having a characteristic length greater than said distance G, and thermally coupled to said device substrate and said support structure.

55. The method in accordance with claim 54, wherein forming said at least one thermally isolating structure, further comprises forming two or more layers minimizing tension in said at least one thermally isolating structure.

56. The method in accordance with claim 54, wherein forming at least one thermally isolating structure, further comprises forming a folded structure having at least one fold.

57. The method in accordance with claim 56, wherein forming said folded structure having at least one fold, further comprises forming a first section folded back substantially parallel to a second section.

58. A micro-fabricated device manufactured in accordance with claim 57.

59. The method in accordance with claim 54, wherein forming said at least one thermally isolating structure, further comprises forming a cross-sectional area of said at least one thermally isolating structure that varies.

60. The method in accordance with claim 54, wherein forming said at least one thermally isolating structure, further comprises forming a thcikness of said at least one thermally isolating structure that varies.

61. The method in accordance with claim 54, wherein forming said at least one thermally isolating structure, further comprises thermally coupling said at least one thermally isolating structure to said device substrate at multiple locations.

62. The method in accordance with claim 54, wherein forming said at least one thermally isolating structure, further comprises thermally coupling said at least one thermally isolating structure to said support structure at multiple locations.

63. The method in accordance with claim 54, wherein defining said device substrate, further comprises defining said device substrate disposed over said support structure.

64. The method in accordance with claim 54, wherein defining said device substrate, further comprises forming at least one micro fluidic channel on said device substrate.

65. The method in accordance with claim 54, wherein defining said device substrate, further comprises forming at least one micro-electromechanical device on said device substrate.

66. The method in accordance with claim 54, wherein forming said support structure, further comprises forming an aperture in said support structure with said device substrate disposed within said aperture forming a substantially planar structure.

67. The method in accordance with claim 54, wherein defining said device substrate, further comprises forming said device substrate from a material selected from the group consisting of glass, ceramic, silicon, gallium arsenide, germanium, indium phosphide, metals, polymers, and combinations thereof.

68. The method in accordance with claim 66, wherein forming said aperture, further comprises anisotropically etching said at least one thermally isolating structure.

69. The method in accordance with claim 54, wherein forming said at least one thermally isolating structure, further comprises minimizing tension in said at least one thermally isolating structure.

70. The method in accordance with claim 54, further comprising forming a package around said device substrate and said at least one thermally isolating structure.

71. The method in accordance with claim 54, wherein forming said package, further comprises sealing said package under a vacuum.

72. The method in accordance with claim 54, wherein forming said package, further comprises forming a vacuum portion and a fluid flow portion.

73. The method in accordance with claim 54, wherein forming said package, further comprises reducing convective thermal transfer from said device substrate.

74. A micro-fabricated device manufactured in accordance with claim 73.

75. The method in accordance with claim 54, wherein forming said package, further comprises forming a radiation reflective surface.

76. A micro-fabricated device manufactured in accordance with claim 75.

77. The method in accordance with claim 75, wherein forming said radiation reflective surface, further comprises interposing said radiation reflective surface between a cover and said device substrate.

78. The method in accordance with claim 54, wherein forming said package further comprises:

interposing a reflecting surface interposed between a cover and said device substrate; and

forming an outer vacuum package enclosing said reflecting surface.

79. A micro-fabricated device manufactured in accordance with claim 54.

80. A method of manufacturing a micro-fabricated device, comprising:

forming a support structure;

defining a device substrate disposed a distance G from said support structure; and

forming at least one thermally isolating structure, having a folded section and a first section, substantially parallel to a second section, said folded section interposed between said first and said second sections, wherein said at least one thermally isolating structure has a characteristic length greater than said distance G, and thermally coupled to said device substrate and said support structure.