Low temperature material bonding technique

• US 6,428,896 B1
• Filed: 06/17/1998
• Issued: 08/06/2002
• Est. Priority Date: 05/16/1996
• Status: Expired due to Fees

• Current Assignee: UT-Battelle LLC
• Original Assignee: UT-Battelle LLC
• Inventors: Foote, Robert S., Ramsey, J. Michael
• Primary Examiner(s): Pyon, Harold
• Assistant Examiner(s): Miggins, Michael C.
• Application Number:
  US09/098,743
• Time in Patent Office: 1,511 Days
• Field of Search: 428/426, 428/428, 428/315.5, 428/315.9, 427/243
• US Class Current: 428/428
• CPC Class Codes: B32B 17/06 comprising glass as the main or only constituent of a layer, next to another layer of a specific material
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10688 Adjustment of the adherence to the glass layers
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C03C 27/06 Joining glass to glass by processes other than fusing fusing C03B23/20; units for use as elements for closing wall or like openings and comprising two or more parallel glass panes in spaced relationship, the panes being permanently secured together E06B3/66
• CPC Class Codes: C09J 1/02 containing water-soluble alkali silicates
• CPC Class Codes: Y10T 428/13 Hollow or container type article [e.g., tube, vase, etc.]
• CPC Class Codes: Y10T 428/131 Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
• CPC Class Codes: Y10T 428/249978 Voids specified as micro
• CPC Class Codes: Y10T 428/24998 Composite has more than two layers
• CPC Class Codes: Y10T 428/261 In terms of molecular thickness or light wave length

Abstract

A method of performing a lower temperature bonding technique to bond together two mating pieces of glass includes applying a sodium silicate aqueous solution between the two pieces.

Claims

1. A device comprising:

a first non-perforated glass piece;

a second non-perforated glass piece having a surface mating with a corresponding surface of the first non-perforated glass piece;

a film disposed between the first and the second non-perforated glass pieces and bonding the first and second non-perforated glass pieces, the film being made of a bonding agent that is capable of covalently bonding to both mating surfaces, wherein the bonding between the first and second non-perforated glass pieces is effected without use of temperatures greater than 90°

C., wherein the bonding agent is sodium silicate, silicic acid, polymeric forms of silicic acid, alkoxysilane, silane, or tetramethoxysilane; and

at least one microchannel located on the mating surfaces of the glass pieces, wherein the at least one microchannel is a groove in the mating surface of the first or the second non-perforated glass piece.

2. A device according to claim 1, wherein the bonding is effected at room temperature.

3. A device according to claim 1, wherein the device further comprises bio-molecules or binding moieties located within the microchannel.

4. A device according to claim 3, wherein the biomolecules or binding moieties comprise nucleic acids, nucleic acid probes, enzymes, antibodies, peptides, or proteins.

5. A device according to claim 1, wherein the film is prepared by application of the bonding agent, wherein the bonding agent comprises an aqueous silicate solution at a concentration of less than about 30 wt. %.

6. A device according to claim 5, wherein the concentration is about 15 wt. % or less.

7. A device according claim 5, wherein the application of the bonding agent is carried out by spin coating.

8. A device according to claim 7, wherein the spin coating is effected at a spin speed of at least about 4,000 rpm.

9. A device according to claim 1, wherein the device further comprises a metal electrode.

10. A device according to claim 9, wherein the metal electrode is disposed in the microchannel.

11. A device according to claim 1, wherein the film is prepared by the applying the bonding agent by spin coating.

12. A device comprising two bonded, mating non-perforated glass pieces having respective mating surfaces and at least one microchannel located on the mating surfaces of the glass pieces, the mating surfaces being bonded by a bonding agent comprising a thin layer of silicate, wherein the bonding occurs without use of temperatures greater than 90°

C. and the at least one microchannel is a groove in the mating surface of at least one of the glass pieces.

13. A device according to claim 12, wherein the device further comprises bio-molecules or binding moieties, wherein the bio-molecules or binding moieties are located within the at least one microchannel.

14. A device according to claim 13, wherein the biomolecules or binding moieties comprise nucleic acids, nucleic acid probes, enzymes, antibodies, peptides, or proteins.

15. A device according to claim 12, wherein the silicate layer is formed from an aqueous silicate solution with a concentration of less than 30 wt. %.

16. A device according to claim 15, wherein the concentration is about 15 wt. % or less.

17. A device prepared by a process comprising:

providing first and second non-perforated mating pieces having respective mating surfaces and at least one microchannel located on the mating surfaces of the first or the second mating pieces, wherein the at least one microchannel is a groove in the mating surface of at least one of the mating pieces;

applying an aqueous solution of silicate to a surface of the first non-perforated mating piece, wherein the concentration of silicate in the aqueous solution is less than 30 wt. %;

eliminating excess water from the applied aqueous solution to form a film on the first non-porous mating piece, the film comprising a molecule having the ability to covalently bond to the first non-perforated mating piece with a reactive moiety at one position on the molecule and covalently bond with the second non-perforated mating piece with a reactive moiety at another position on the molecule;

bringing the second non-perforated mating piece in contact with the first non-perforated mating piece with the film located between the first non-perforated mating piece and the second non-perforated mating piece, wherein the bonding method provides for strong bonds at temperatures of 90°

C. and less.

18. A device according to claim 17, wherein each of the non-perforated mating pieces is a glass piece.

19. A device according to claim 17, wherein the step of eliminating water is carried out by spinning the first mating piece.

20. A device according to claim 19, wherein the spinning is carried out at a speed of at least about 4,000 rpm.

21. A device according to claim 17, wherein the concentration of silicate in the aqueous solution is about 15 wt. % or less.

22. A device according to claim 17, wherein the mating surface of the second non-perforated mating piece contains the at least one microchannel and the mating surface of the second non-perforated mating piece faces the thin layer.

23. A device according to claim 22, wherein the at least one microcharnel contains bio-molecules or binding moieties.

24. A device according to claim 23, wherein the biomolecules or binding moieties comprise nucleic acids, nucleic acid probes, enzymes, antibodies, peptides, or proteins.

25. A device according to claim 22, wherein the device further comprises a metal electrode, wherein the metal electrode is disposed in the at least one microchannel.

26. A device according to claim 17, wherein the film is substantially continuous.

27. A device according to claim 17, wherein the film is discontinuous.