Method of bonding two surfaces and construct therefrom and microfluidic device containing the construct

Patent metadata

Field	Value
Publication number	US-9782772-B2
Application number	US-201514930412-A
Country	US
Kind code	B2
Filing date	Nov 2, 2015
Priority date	Oct 31, 2014
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

Provided is a method of bonding two surfaces, which includes providing nitrogen or ammonia plasma to a plastic material where a polysiloxane contacted, and a construct manufactured therefrom.

First claim

What is claimed is:

1. A method of bonding two surfaces, the method comprising:
contacting a surface of a plastic material with a polysiloxane material;
removing the polysiloxane material from the surface of the plastic material;
providing nitrogen or ammonia plasma to the surface of the plastic material that was contacted with the polysiloxane material;
providing oxygen plasma to a surface of a polysiloxane material; and
contacting the surface of the plastic material provided with nitrogen or ammonia plasma with the surface of the polysiloxane material provided with oxygen plasma to bond the surfaces together and provide a bonded product, wherein the bonded product is a microfluidic device.

2. The method of claim 1 , wherein
contacting the surface of the plastic material with the polysiloxane material before providing nitrogen or ammonia plasma to the surface of the plastic material comprises applying pressure between the surface of the plastic material and the polysiloxane material of at least 1 Pa.

3. The method of claim 1 , wherein the polysiloxane material contacted with the surface of the plastic material before providing nitrogen or ammonia plasma to the surface of the plastic material is in a solid state.

4. The method of claim 1 , wherein the polysiloxane material contacted with the surface of the plastic material before providing nitrogen or ammonia plasma to the surface of the plastic material is a polysiloxane film.

5. The method of claim 1 , wherein providing nitrogen or ammonia plasma to the surface of the plastic material comprises exposing the surface of the plastic material to nitrogen or ammonia plasma at a plasma power of about 30 W to about 50 W and a gas flow rate of about 1 sccm to about 5 sccm for about 20 seconds to about 60 seconds.

6. The method of claim 1 , wherein providing oxygen plasma to the surface of the polysiloxane material comprises exposing the second surface to oxygen plasma at a plasma power of about 70 W to about 100 W and a gas flow rate of about 30 sccm to about 50 sccm for about 60 seconds to about 180 seconds.

7. The method of claim 1 , wherein contacting the surface of the plastic material provided with nitrogen or ammonia plasma with the surface of the polysiloxane material provided with oxygen plasma comprises applying pressure between the surfaces of at least 1 Pa.

8. The method of claim 1 , wherein the plastic material is a carbon-based polymer.

9. The method of claim 1 , wherein the plastic material is polyolefin, polystyrene, polycarbonate (PC), polymethacrylate (PMA), poly(methyl methacrylate) (PMMA), polytetrafluoroethylene (PTFE), polyvinylidene chloride (PVC), polyethylene terephthalate (PET), or a combination thereof.

10. The method of claim 1 , wherein the polysiloxane material contacted with the surface of the plastic material before providing nitrogen or ammonia plasma to the surface of the plastic material, and the polysiloxane material provided with oxygen plasma, which may be the same or different, are each independently a material comprising a polysiloxane of Formula 1,

wherein,
R 1 , R 2 , and R 3 are each independently hydrogen, an alkyl group, an aryl group, a cycloalkyl group, an alkoxy group, a hydroxyalkyl, an alkoxyalkyl group, and a hydroxyalkoxyalkyl group, each optionally substituted with a halo group,
R 4 is hydrogen, an alkyl group or an aryl group, each optionally substituted with a halo group,
and n is an integer.

11. The method of claim 1 , wherein
the polysiloxane material contacted with the surface of the plastic material before providing nitrogen or ammonia plasma to the surface of the plastic material and the polysiloxane material provided with oxygen plasma, which may be the same or different, are each independently polydimethylsiloxane (PDMS) or polyphenylsiloxane.

12. The method of claim 1 , further comprising performing an annealing process after bonding the surfaces.

13. The method of claim 1 , wherein the plastic material comprises a microstructure.

14. The method of claim 1 , further comprising
providing oxygen plasma to a surface of the polysiloxane material opposite the surface contacted with the plastic material; and
contacting a surface of a second polysiloxane with the surface of the polysiloxane material opposite the surface contacted with the plastic material, to bond the surface of the second polysiloxane to the surface of the polysiloxane material opposite the surface contacted with the plastic material.

15. The method of claim 1 , further comprising
providing oxygen plasma to a surface of a second polysiloxane material, and contacting the surface of the second polysiloxane material with a surface of the polysiloxane material opposite the surface contacted with the plastic material, to bond the surface of the second polysiloxane to the surface of the polysiloxane material opposite the surface contacted with the plastic material.

16. The method of claim 1 , further comprising
providing oxygen plasma to a surface of the polysiloxane material opposite the surface contacted with the plastic material and a surface of a second polysiloxane; and
contacting the surface of the second polysiloxane with the surface of the polysiloxane material opposite the surface contacted with the plastic material, to bond the surface of the second polysiloxane to the surface of the polysiloxane material opposite the surface contacted with the plastic material.

17. The method of claim 16 , wherein the second polysiloxane comprises a microstructure.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Shim Jeoyoung
• Jeon Woosung
• Kyoung Yongkoo
• Moon Euiseong

Classifications

• B81C3/001

  Bonding of two components · CPC title

• B29L2031/7506

  Valves · CPC title

• B29K2025/06

  PS, i.e. polystyrene · CPC title

• B29C66/71

  characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125) · CPC title

• B29K2069/00

  Use of PC, i.e. polycarbonates {or derivatives thereof}, as moulding material · CPC title