Method of patterning a surface using a deformable stamp

• US 7,476,523 B2
• Filed: 08/14/2001
• Issued: 01/13/2009
• Est. Priority Date: 08/14/2000
• Status: Expired due to Fees

• Current Assignee: Komatsu Ltd., Surface Logix, Inc.
• Original Assignee: Surface Logix, Inc.
• Inventors: Schueller, Olivier, Kim, Enoch, Whitesides, George
• Primary Examiner(s): Naff; David M
• Application Number:
  US09/929,736
• Publication Number:
  US 20020050220A1
• Time in Patent Office: 2,709 Days
• Field of Search: 435/174, 435/177, 435/180
• US Class Current: 435/174
• CPC Class Codes: B05D 1/283 Transferring monomolecular layers or solutions of molecules adapted for forming monomolecular layers from carrying elements
• CPC Class Codes: B29C 2059/023 Microembossing
• CPC Class Codes: B29C 59/021 of profiled articles, e.g. hollow or tubular articles, beams
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: G03F 7/0002 Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping
• CPC Class Codes: Y10S 530/81 Carrier - bound or immobilized peptides or proteins and the preparation thereof, e.g. biological cell or cell fragment as carrier
• CPC Class Codes: Y10S 530/811 Peptides or proteins is immobilized on, or in, an inorganic carrier
• CPC Class Codes: Y10S 530/812 Peptides or proteins is immobilized on, or in, an organic carrier
• CPC Class Codes: Y10S 530/815 Carrier is a synthetic polymer

Abstract

A deformable stamp for patterning a surface. The stamp can be placed in contact with an entire 3-dimensional object, such as a rod, in a single step. The stamp can also be used to pattern the inside of a tube or rolled over a surface to form a continuous pattern. The stamp may also be used for fluidic patterning by flowing material through channels defined by raised and recessed portions in the surface of the stamp as it contacts the substrate. The stamp may be used to deposit self-assembled monolayers, biological materials, metals, polymers, ceramics, or a variety of other materials. The patterned substrates may be used in a variety of engineering and medical applications.

Claims

1. A method of patterning a surface, comprising:

providing a stamp having a lumen with a portal;

passing at least a portion of a substrate into the lumen via the portal; and

modulating the dimensions of the stamp by reducing a cross sectional dimension of the lumen to place an interior stamping surface of the lumen in contact with an exterior surface of the substrate and thereby producing a pattern on the exterior surface of the substrate.

2. The method of claim 1, further comprising modulating the dimensions of the stamp before the step of passing at least a portion of a substrate into the lumen.

3. The method of claim 1, further comprising, after the step of modulating the dimensions of the stamp to place the stamping surface in contact with the substrate, modulating the dimensions of the stamp to facilitate removal of the stamping surface from the substrate.

4. The method of claim 1, wherein the step of modulating the dimensions comprises a member of the group consisting of applying a mechanical stress, applying an electrical stimulus, removing a mechanical stress, removing an electrical stimulus, creating a partial vacuum, venting a vacuum, applying a magnetic field, removing a magnetic field, and any combination of the above.

5. The method of claim 4, wherein the mechanical stress comprises a positive hoop stress, a negative hoop stress, or a hydrostatic stress.

6. The method of claim 1, wherein the entirety of the stamp is modulated at the same time.

7. The method of claim 1, wherein at least one of the stamping surface and a surface of the substrate exhibits convexity in at least one dimension, and said convexity does not result from a surface texture or pattern.

8. The method of claim 1, further comprising exposing the substrate to electromagnetic radiation by transmitting said radiation through the stamp, wherein a portion of the stamp is opaque to said radiation.

9. The method of claim 1, further comprising disposing a transferable material on the stamping surface, wherein, when the stamp is in contact with the substrate, the transferable material is transferred to the substrate in a pattern corresponding to the pattern on the stamping surface.

10. The method of claim 9, wherein the transferable material comprises a member of the group consisting of a self-assembled monolayer forming molecule, a protein, an amino acid sequence, a synthetic peptide, a simple carbohydrate, a nucleic acid sequence, a lipid, a complex carbohydrate, an organic molecule, a polymer precursor, an inorganic molecule, an organometallic complex, a metal, a metallic species in a solvent, a metal colloid in a solvent, biological particles suspended in a carrier, and non-biological particles suspended in a carrier, an electroless plating precursor, and any combination of the above.

11. The method of claim 1, wherein the stamping surface comprises a pattern comprising at least one channel defined by raised portions on the surface of the stamp.

12. The method of claim 11, wherein a cross section of the stamp includes two raised portions, and wherein an angular distance between the two raised portions is between 0°

and 180°

.

13. The method of claim 11, wherein a lateral dimension of a channel or a raised portion is 100 nm or greater.

14. The method of claim 11, further comprising:

placing the channel in fluidic communication with a fluid source; and

causing a fluid to flow from the fluid source through a path bounded by the raised portions and the substrate.

15. The method of claim 14, wherein the fluid comprises a member of the group consisting of an etchant, a polymer precursor, a sol-gel fluid, a metal colloid in a solvent, cells suspended in a medium, a metallic species in a solvent, a metal, an electroplating solution, an electroless plating solution, a reactive gas, and any combination of the above.

16. The method of claim 14, wherein the fluid comprises a solution comprising a member of the group consisting of a self-assembled monolayer forming molecule, a protein, an amino acid sequence, a synthetic peptide, a simple carbohydrate, a nucleic acid sequence, a lipid, a complex carbohydrate, an organic molecule, a polymer precursor, an inorganic molecule, an electroless plating precursor, an organometallic complex, a metallic species, cells in a medium, and any combination of the above.

17. The method of claim 14, further comprising adjusting the temperature of the fluid while it is in the channel.

18. The method of claim 14, further comprising exposing the fluid in the channel to an electric current, a magnetic field, or electromagnetic radiation.

19. The method of claim 14, further comprising exposing the fluid to ultraviolet light.

20. The method of claim 14, further comprising adjusting the temperature of the substrate while the fluid is in the channel.

21. The method of claim 14, wherein a lateral dimension of a channel or raised portion is 200 nm or greater.

22. The method of claim 14, further comprising disposing a material on the substrate before the step of causing, wherein a component of the fluid interacts with the material when it is disposed in the channel.

23. The method of claim 14, wherein the fluid comprises a carrier and a material dissolved or suspended in the carrier, wherein the method further comprises allowing the carrier to dissipate and the material to harden.

24. The method of claim 11, further comprising wetting the stamping surface with a fluid, wherein, when the stamping surface is in contact with the surface of the substrate, an interaction of the substrate with the fluid causes the substrate to develop a surface texture in a pattern conforming to the stamping surface of the stamp.

25. The method of claim 24, wherein the fluid dissolves or swells the substrate.

26. The method of claim 24, wherein the substrate comprises a polymer.

27. The method of claim 1, wherein the substrate comprises a metallic material, a semiconductor material, a ceramic, or a polymer.

28. The method of claim 27, wherein the substrate comprises a coating comprising a metallic material, a semiconductor material, a ceramic, a glass, or a polymer.

29. The method of claim 1, further comprising disposing a material on the substrate before the step of passing.

30. The method of claim 1, wherein the stamp has a diameter of at least 100 micrometers.

31. The method of claim 1, wherein the stamp and the substrate have the same or different shapes.

32. The method of claim 1, wherein walls defining the lumen are characterized by flat, curved, or a combination of both.

33. The method of claim 1, wherein the stamp is tubular.

34. The method of claim 1, further comprising increasing a cross sectional dimension of the lumen before the step of passing the at least a portion of the substrate into the lumen.

35. The method of claim 1, wherein the stamp is cylindrical.

36. The method of claim 1, wherein the stamp is spherical.

37. The method of claim 1, wherein the stamp is elliptical.

38. The method of claim 1, wherein the stamp is polygonal.

39. The method of claim 1, wherein the stamp takes the shape of a spheroid having a variety of diameter lengths.

40. The method of claim 1, wherein the lumen has only one portal.

41. A method of patterning a surface, comprising:

providing a stamp having a lumen with a first portal;

providing a substrate having a lumen with a second portal;

passing at least a portion of the stamp into the lumen of the substrate via the second portal; and

modulating the dimensions of the stamp by increasing a cross sectional dimension of the lumen of the stamp to place an exterior stamping surface of the stamp in contact with an interior surface within the lumen of the substrate and thereby producing a pattern on the interior surface within the lumen of the substrate.

42. The method of claim 41, further comprising reducing a cross sectional dimension of the lumen of the stamp before the step of passing the at least a portion of the stamp into the lumen of the substrate.