Anisotropic conductive film, composition for the same, and apparatus including the same

• US 9,384,869 B2
• Filed: 10/10/2013
• Issued: 07/05/2016
• Est. Priority Date: 12/29/2010
• Status: Active Grant

• Current Assignee: Kukdo Advanced Materials Company Limited
• Original Assignee: Cheil Industries Incorporated (Samsung Group)
• Inventors: Ko, Youn Jo, Uh, Dong Seon, Cho, Jang Hyun, Park, Jin Seong, Bae, Sang Sik, Kim, Jin Kyu
• Primary Examiner(s): KOPEC, MARK T
• Application Number:
  US14/050,555
• Publication Number:
  US 20140034882A1
• Time in Patent Office: 999 Days
• US Class Current: 1/1
• CPC Class Codes: C08L 33/12 Homopolymers or copolymers of methyl methacrylate
• CPC Class Codes: C08L 35/04 Homopolymers or copolymers of nitriles C08L35/06, C08L35/08 take precedence
• CPC Class Codes: C09J 175/16 having terminal carbon-to-carbon unsaturated bonds
• CPC Class Codes: C09J 9/02 Electrically-conducting adhesives
• CPC Class Codes: H01B 1/12 organic substances organic macromolecular compounds or compositions C08
• CPC Class Codes: H01B 1/24 the conductive material comprising carbon-silicon compounds, carbon or silicon

Abstract

An anisotropic conductive film includes a binder part, a curing part, an initiator, and conductive particles, wherein the binder part includes at least one of a nitrile butadiene rubber (NBR) resin and a urethane resin, wherein the anisotropic conductive film has an electrical conductivity of more than 0 μS/cm to about 100 μS/cm.

Claims

1. An anisotropic conductive film, comprising:

a binder part;

a curing part;

an initiator; and

conductive particles,

wherein the binder part includes at least one of a nitrile butadiene rubber (NBR) resin and a urethane resin, and the anisotropic conductive film produces an electrical conductivity of 1 μ

S/cm to about 100 μ

S/cm when 0.4 g of the anisotropic conductive film is put in 20 g of purified water and boiled at 100°

C. for 10 hours, after which a product liquid is put in a standard conductivity measurement cell having a diameter of 1 cm, followed by measurement of electrical conductivity at a compensation temperature of 25°

C. using a conductivity meter.

2. The anisotropic conductive film as claimed in claim 1, wherein the anisotropic conductive film has an ion content of more than 0 ppm to about 100 ppm.

3. The anisotropic conductive film as claimed in claim 1, wherein the anisotropic conductive film has an ion content of more than 0 ppm to about 50 ppm.

4. The anisotropic conductive film as claimed in claim 1, wherein the binder part includes the NBR resin, and the NBR resin has an ion content of more than 0 ppm to about 100 ppm.

5. The anisotropic conductive film as claimed in claim 1, wherein the binder part includes the urethane resin, and the urethane resin has an ion content of more than 0 ppm to about 100 ppm.

6. The anisotropic conductive film as claimed in claim 1, wherein the binder part further includes an acrylic resin.

7. The anisotropic conductive film as claimed in claim 6, wherein the binder part includes about 20 to about 80% by weight (wt %) of the acrylic resin and about 20 to about 80 wt % of the NBR resin, the NBR resin having an ion content of more than 0 ppm to about 100 ppm.

8. The anisotropic conductive film as claimed in claim 6, wherein the binder part includes about 20 to about 80 wt % of the acrylic resin and about 20 to about 80 wt % of the urethane resin, the urethane resin having an ion content of more than 0 ppm to about 100 ppm.

9. The anisotropic conductive film as claimed in claim 6, wherein the binder part includes about 20 to about 90 wt % of the acrylic resin, about 5 to about 55 wt % of the NBR resin, the NBR resin having an ion content of more than 0 ppm to about 100 ppm, and about 5 to about 40 wt % of the urethane resin, the urethane resin having an ion content of more than 0 ppm to about 100 ppm.

10. The anisotropic conductive film as claimed in claim 1, wherein the binder part further includes at least one thermoplastic resin selected from acrylonitrile, polyamide, olefin and silicone resins.

11. The anisotropic conductive film as claimed in claim 1, wherein the curing part includes at least one of a urethane (meth)acrylate and a (meth)acrylate monomer.

12. The anisotropic conductive film as claimed in claim 1, wherein the initiator includes a radical initiator.

13. The anisotropic conductive film as claimed in claim 1, wherein the anisotropic conductive film includes about 20 to about 78 wt % of the binder part, about 20 to about 50 wt % of the curing part, about 1 to about 10 wt % of the radical initiator and about 1 to about 20 wt % of the conductive particles in a solid state.

14. The anisotropic conductive film as claimed in claim 1, wherein the anisotropic conductive film further includes a polyurethane bead.

15. The anisotropic conductive film as claimed in claim 14, wherein the polyurethane bead includes an ion-exchanged polyurethane bead.

16. The anisotropic conductive film as claimed in claim 14, wherein the polyurethane bead has an ion content of more than 0 ppm to about 10 ppm.

17. The anisotropic conductive film as claimed in claim 14, wherein the polyurethane bead is included in an amount of about 1 to about 10 parts by weight based on 100 parts by weight of the anisotropic conductive film in terms of solid content.

18. An apparatus comprising the anisotropic conductive film as claimed in claim 1.

19. A composition for an anisotropic conductive film, the composition comprising:

a binder part;

a curing part;

an initiator; and

conductive particles,

wherein the binder part includes at least one of an ion exchange treated nitrile butadiene rubber (NBR) resin and an ion exchange treated urethane resin, and the anisotropic conductive film produces an electrical conductivity of 1 μ

S/cm to about 100 μ

S/cm when 0.4 g of the anisotropic conductive film is put in 20 g of purified water and boiled at 100°

C. for 10 hours, after which a product liquid is put in a standard conductivity measurement cell having a diameter of 1 cm, followed by measurement of electrical conductivity at a compensation temperature of 25°

C. using a conductivity meter.