METHODS FOR FABRICATING A BIOSENSOR WITH A SURFACE TEXTURE

• US 20080035478A1
• Filed: 08/13/2007
• Published: 02/14/2008
• Est. Priority Date: 08/11/2006
• Status: Abandoned Application

• Current Assignee: Home Diagnostics Incorporated
• Original Assignee: Home Diagnostics Incorporated
• Inventors: Popovich, Natasha, Wegner, Greta
• Application Number:
  US11/837,630
• Publication Number:
  US 20080035478A1
• Time in Patent Office: Days
• US Class Current: 204/403.01
• CPC Class Codes: C12Q 1/001 Enzyme electrodes
• CPC Class Codes: C12Q 1/006 for glucose
• CPC Class Codes: G01N 2333/904 acting on CHOH groups as donors, e.g. glucose oxidase, lactate dehydrogenase (1.1)
• CPC Class Codes: G01N 27/3272 Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels optical biosensors G01N33/52
• CPC Class Codes: G01N 33/54393 Improving reaction conditions or stability, e.g. by coating or irradiation of surface, by reduction of non-specific binding, by promotion of specific binding

Abstract

The present invention includes a biosensor having a generally planar substrate including a surface texture configured to increase a surface area of the generally planar substrate. The biosensor may also include at least one conductive component at least partially formed on a portion of the surface texture. The invention also includes a method for manufacturing a biosensor. The method may include forming a surface texture on a generally planar substrate whereby the surface texture increases a surface area of the generally planar substrate. The method also includes at least partially forming at least one conductive component on a portion of the surface texture. The present invention also includes a reel having a generally planar substrate including a surface texture configured to increase a surface area of the generally planar substrate. The reel also includes at least one conductive component at least partially formed on a portion of the surface texture, and a plurality of registration points formed on the generally planar substrate.

Claims

1. A biosensor, comprising:

a generally planar substrate including a surface texture configured to increase a surface area of the generally planar substrate; and

at least one conductive component at least partially formed on a portion of the surface texture.

2. The biosensor of claim 1, wherein the surface texture includes a plurality of surface features.

3. The biosensor of claim 2, wherein at least one of the plurality of surface features includes a geometry selected from the group consisting of a corrugation, a pyramid, a box-like structure, a needle, and a dimple.

4. The biosensor of claim 3, wherein the surface texture includes a first surface feature having a first geometry and a second surface feature having a second geometry, wherein the first geometry is substantially similar to the second geometry.

5. The biosensor of claim 3, wherein the surface texture includes a first surface feature having a first geometry and a second surface feature having a second geometry, wherein the first geometry and the second geometry are not the same.

6. The biosensor of claim 2, wherein the plurality of surface features forms an array.

7. The biosensor of claim 2, wherein the plurality of surface features forms an irregular arrangement.

8. The biosensor of claim 2, wherein the plurality of surface features have a density in a range of 1 surface feature per 10 mm² to 1,000,000 surface features per mm².

9. The biosensor of claim 2, wherein at least one of the plurality of surface features has a dimension in a range of 100 micrometers to 1 nanometer.

10. The biosensor of claim 2, wherein at least one of the plurality of surface features further includes a secondary surface feature dimensioned smaller than the at least one of the plurality of surface features.

11. The biosensor of claim 1, wherein the at least one conductive component includes a top surface and a bottom surface, and wherein the top surface has a geometry substantially similar to a geometry of the bottom surface.

12. The biosensor of claim 1, wherein the at least one conductive components includes at least one of an anode, a cathode, a fill-detect electrode, an auto-on conductor, and a coding region.

13. The biosensor of claim 1, wherein the at least one conductive component is formed from at least one of palladium, gold, platinum, silver, iridium, carbon, indium tin oxide, indium zinc oxide, copper, aluminum, gallium, iron, mercury amalgams, tantalum, titanium, zirconium, nickel, osmium, rhenium, rhodium palladium, an organometallic, and a metallic alloy.

14. The biosensor of claim 1, wherein the at least one conductive component is at least partially formed using at least one process selected from the group consisting of sputtering, evaporation, electroplating, ultrasonic spraying, pressure spraying, direct writing, shadow mask lithography, lift-off lithography, and laser ablation.

15. The biosensor of claim 1, wherein the generally planar substrate includes at least one of an acrylic, a PET, and a plastic.

16. The biosensor of claim 1, wherein the surface texture is at least partially formed by a process selected from the group consisting of microreplication, embossing, thermoforming, injection molding, deposition, etching, laser ablation, and extreme ultra-violet radiation.

17. The biosensor of claim 1, wherein the biosensor further includes a reagent layer at least partially deposited on the at least one conductive component.

18. The biosensor of claim 17, wherein the reagent layer is deposited using a process selected from the group consisting of screen-printing, spray deposition, piezo, and ink jet printing.

19. The biosensor of claim 17, wherein the reagent layer includes at least one of glucose oxidase, glucose dehydrogenase, potassium ferricyanide, and ruthenium hexamine.

20. The biosensor of claim 1, wherein the biosensor further includes a dielectric spacer layer at least partially deposited on the at least one conductive component.

21. The biosensor of claim 20, wherein the dielectric spacer layer includes at least one of an acrylic, a PET, and a plastic.

22. The biosensor of claim 20, wherein the biosensor further includes an adhesive layer disposed between the dielectric spacer layer and the at least one conductive component.

23. A method for manufacturing a biosensor, comprising:

forming a surface texture on a generally planar substrate whereby the surface texture increases a surface area of the generally planar substrate; and

at least partially forming at least one conductive component on a portion of the surface texture.

24. The method of claim 23, wherein forming the surface texture includes forming a plurality of surface features.

25. The method of claim 24, wherein forming at least one of the plurality of surface features includes forming at least one surface feature with a geometry selected from the group consisting of a corrugation, a pyramid, a box-like structure, a needle, and a dimple.

26. The method of claim 24, wherein the surface texture includes a first surface feature having a first geometry and a second surface feature having a second geometry, wherein the first geometry is substantially similar to the second geometry.

27. The method of claim 24, wherein the surface texture includes a first surface feature having a first geometry and a second surface feature having a second geometry, wherein the first geometry and the second geometry are not the same.

28. The method of claim 24, wherein forming the surface texture includes forming the plurality of surface features in an array formation.

29. The method of claim 24, wherein forming the surface texture includes forming the plurality of surface features in an irregular arrangement.

30. The method of claim 24, wherein the plurality of surface features are formed with a density in a range of 1 surface feature per 10 mm² to 1,000,000 surface features per mm².

31. The method of claim 24, wherein at least one of the plurality of surface features has a dimension in a range of 100 micrometers to 1 nanometer.

32. The method of claim 24, wherein forming at least one of the plurality of surface features further includes forming a plurality of secondary surface features dimensioned smaller than the at least one of the plurality of surface features.

33. The method of claim 23, wherein at least partially forming the at least one conductive component includes at least partially forming a top surface and at least partially forming a bottom surface, and wherein the top surface has ageometry substantially similar to a geometry of the bottom surface.

34. The method of claim 23, wherein at least partially forming the at least one conductive components includes at least partially forming at least one of an anode, a cathode, a fill-detect electrode, an auto-on conductor, and a coding region.

35. The method of claim 23, wherein the at least one conductive component is formed from at least one of palladium, gold, platinum, silver, iridium, carbon, indium tin oxide, indium zinc oxide, copper, aluminum, gallium, iron, mercury amalgams, tantalum, titanium, zirconium, nickel, osmium, rhenium, rhodium palladium, an organometallic, and a metallic alloy.

36. The method of claim 23, wherein the at least one conductive component is at least partially formed using at least one process selected from the group consisting of sputtering, evaporation, electroplating, ultrasonic spraying, pressure spraying, direct writing, shadow mask lithography, lift-off lithography, and laser ablation.

37. The method of claim 23, wherein the generally planar substrate includes at least one of an acrylic, a PET, and a plastic.

38. The method of claim 23, wherein the surface texture is at least partially formed by a process selected from the group consisting of microreplication, embossing, thermoforming, injection molding, deposition, etching, laser ablation, and extreme ultra-violet radiation.

39. The method of claim 23, wherein the method further includes at least partially depositing a reagent layer on the at least one conductive component.

40. The method of claim 39, wherein the reagent layer is deposited using a process selected from the group consisting of screen-printing, spray deposition, piezo, and ink jet printing.

41. The method of claim 39, wherein the reagent layer includes at least one of glucose oxidase, glucose dehydrogenase, potassium ferricyanide, and ruthenium hexamine.

42. The method of claim 23, wherein the method further includes at least partially depositing a dielectric spacer layer on the at least one conductive component.

43. The method of claim 42, wherein the dielectric spacer layer includes at least one of an acrylic, a PET, and a plastic.

44. The method of claim 42, wherein the method further includes depositing an adhesive layer on the dielectric spacer layer such that the adhesive layer is disposed between the dielectric spacer layer and the at least one conductive component.

45. A reel, comprising:

a generally planar substrate including a surface texture configured to increase a surface area of the generally planar substrate;

at least one conductive component at least partially formed on a portion of the surface texture; and

a plurality of registration points formed on the generally planar substrate.

46. The reel of claim 45, wherein the surface texture includes a plurality of surface features.

47. The reel of claim 46, wherein at least one of the plurality of surface features includes a geometry selected from the group consisting of a corrugation, a pyramid, a box-like structure, a needle, and a dimple.

48. The reel of claim 47, wherein the surface texture includes a first surface feature having a first geometry and a second surface feature having a second geometry, wherein the first geometry is substantially similar to the second geometry.

49. The reel of claim 47, wherein the surface texture includes a first surface feature having a first geometry and a second surface feature having a second geometry, wherein the first geometry and the second geometry are not the same.

50. The reel of claim 46, wherein the plurality of surface features forms an array.

51. The reel of claim 46, wherein the plurality of surface features forms an irregular arrangement.

52. The reel of claim 46, wherein the plurality of surface features have a density in a range of 1 surface feature per 10 mm² to 1,000,000 surface features per mm².

53. The reel of claim 46, wherein at least one of the plurality of surface features has a dimension in a range of 100 micrometers to 1 nanometer.

54. The reel of claim 46, wherein at least one of the plurality of surface features further includes a secondary surface feature dimensioned smaller than the at least one of the plurality of surface features.

55. The reel of claim 45, wherein the at least one conductive component includes a top surface and a bottom surface, and wherein the top surface has a geometry substantially similar to a geometry of the bottom surface.

56. The reel of claim 45, wherein the at least one conductive components includes at least one of an anode, a cathode, a fill-detect electrode, an auto-on conductor, and a coding region.

57. The reel of claim 45, wherein the at least one conductive component is formed from at least one of palladium, gold, platinum, silver, iridium, carbon, indium tin oxide, indium zinc oxide, copper, aluminum, gallium, iron, mercury amalgams, tantalum, titanium, zirconium, nickel, osmium, rhenium, rhodium palladium, an organometallic, and a metallic alloy.

58. The reel of claim 45, wherein the at least one conductive component is at least partially formed using at least one process selected from the group consisting of sputtering, evaporation, electroplating, ultrasonic spraying, pressure spraying, direct writing, shadow mask lithography, lift-off lithography, and laser ablation.

59. The reel of claim 45, wherein the generally planar substrate includes at least one of an acrylic, a PET, and a plastic.

60. The reel of claim 45, wherein the surface texture is at least partially formed by a process selected from the group consisting of microreplication, embossing, thermoforming, injection molding, deposition, etching, laser ablation, and extreme ultra-violet radiation.

61. The reel of claim 45, wherein the biosensor further includes a reagent layer at least partially deposited on the at least one conductive component.

62. The reel of claim 61, wherein the reagent layer is deposited using a process selected from the group consisting of screen-printing, spray deposition, piezo, and ink jet printing.

63. The reel of claim 61, wherein the reagent layer includes at least one of glucose oxidase, glucose dehydrogenase, potassium ferricyanide, and ruthenium hexamine.

64. The reel of claim 45, wherein the biosensor further includes a dielectric spacer layer at least partially deposited on the at least one conductive component.

65. The reel of claim 64, wherein the dielectric spacer layer includes at least one of an acrylic, a PET, and a plastic.

66. The reel of claim 64, wherein the biosensor further includes an adhesive layer disposed between the dielectric spacer layer and the at least one conductive component.

67. The reel of claim 45, wherein the plurality of registration points are formed by a process selected from the group consisting of laser ablation, etching, drilling, printing, punching, scoring, heating, compression and molding.

68. The reel of claim 45, wherein the plurality of registration points are separated by less than 500 mm.

69. The reel of claim 45, wherein at least one of the plurality of registration points is less than 10 mm wide.