Anisotropic conductive material body, display apparatus, method for producing the display apparatus, and conductive member

• US 7,134,879 B2
• Filed: 06/04/2004
• Issued: 11/14/2006
• Est. Priority Date: 06/05/2003
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Kawaguchi, Hisao, Sekiguchi, Shingo, Sugimoto, Mitsuhiro
• Primary Examiner(s): Paumen, Gary F.
• Application Number:
  US10/860,021
• Publication Number:
  US 20040257516A1
• Time in Patent Office: 893 Days
• Field of Search: 439/66, 439/86, 439/91, 439/591, 439/931, 428/323, 428/325, 428/403, 428/407, 252/512, 252/513, 252/514, 264/109
• US Class Current: 439/66
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements
• CPC Class Codes: H01L 2224/2929 with a principal constituent of the material being a polymer, e.g. polyester, phenolic based polymer, epoxy
• CPC Class Codes: H01L 2224/293 with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
• CPC Class Codes: H01L 2224/2939 with a principal constituent of the material being a polymer, e.g. polyester, phenolic based polymer, epoxy
• CPC Class Codes: H01L 2224/29399 Coating material
• CPC Class Codes: H01L 2224/83851 being an anisotropic conductive adhesive
• CPC Class Codes: H01L 24/83 using a layer connector
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/01079 Gold [Au]
• CPC Class Codes: H01L 2924/0665 Epoxy resin
• CPC Class Codes: H05K 2201/0221 Insulating particles having an electrically conductive coating
• CPC Class Codes: H05K 2203/0278 Flat pressure, e.g. for connecting terminals with anisotropic conductive adhesive
• CPC Class Codes: H05K 2203/1142 Conversion of conductive material into insulating material or into dissolvable compound
• CPC Class Codes: H05K 3/323 by applying an anisotropic conductive adhesive layer over an array of pads
• CPC Class Codes: H05K 3/361 Assembling flexible printed circuits with other printed circuits
• CPC Class Codes: Y10S 439/931 Conductive coating
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/252 Glass or ceramic [i.e., fired or glazed clay, cement, etc.] [porcelain, quartz, etc.]
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/2998 : including synthetic resin or polymer

Abstract

An anisotropic conductive material body includes an insulating medium; and a plurality of conductive members dispersed in the medium. At least a surface of each of the plurality of conductive members is conductive. A force is applied to at least one of the plurality of conductive members so as to change the at least one conductive member, so that the conductive property of the anisotropic conductive material body provided by the at least one conductive member is changed to an insulating property.

Claims

1. An anisotropic conductive material body, comprising:

an insulating medium; and

a plurality of conductive members dispersed in the medium;

wherein;

at least a surface of each of the plurality of conductive members is conductive; and

a force is applied to at least one of the plurality of conductive members so as to change the at least one conductive member, so that the conductive property of the anisotropic conductive material body provided by the at least one conductive member is changed to an insulating property.

2. An anisotropic conductive material body according to claim 1, wherein the medium is adhesive.

3. An anisotropic conductive material body according to claim 1, wherein the medium is formed of a synthetic resin.

4. An anisotropic conductive material body according to claim 1, wherein the plurality of conductive members are a plurality of conductive particles.

5. An anisotropic conductive material body according to claim 1, wherein:

the plurality of conductive members each include a plurality of insulating particles and a conductive plating cover for covering the plurality of insulating particles; and

the change in the at least one conductive member includes breakage of the conductive plating cover of the at least one conductive member.

6. An anisotropic conductive material body according to claim 5, wherein:

the plurality of conductive members are a plurality of conductive particles; and

the plurality of conductive particles each have a particle diameter of 10 to 20 μ

m inclusive, and the plurality of insulating particles each have a particle diameter of 2 to 5 μ

m inclusive.

7. An anisotropic conductive material body according to claim 1, wherein the change in the at least one conductive member includes division of the at least one conductive member.

8. An anisotropic conductive material body according to claim 1, further comprising a plurality of insulating particles dispersed in the medium.

9. An anisotropic conductive material body according to claim 8, wherein the plurality of insulating particles each have a particle diameter of 2 to 20 μ

m inclusive.

10. An anisotropic conductive material body according to claim 1, wherein the medium is film-like.

11. A display apparatus, comprising:

a display panel;

a driving circuit for driving the display panel;

a driving circuit connector provided on the driving circuit;

a panel connector provided on the display panel; and

an anisotropic conductive material body for electrically connecting the driving circuit connector and the panel connector to each other;

wherein;

the anisotropic conductive material body includes an insulating medium, and a plurality of conductive members dispersed in the medium;

at least a surface of each of the plurality of conductive members is conductive; and

a force is applied to at least one of the plurality of conductive members so as to change the at least one conductive member, so that the conductive property of the anisotropic conductive material body provided by the at least one conductive member is changed to an insulating property.

12. A display apparatus according to claim 11, wherein the anisotropic conductive material body is used for mounting the driving circuit on the display panel.

13. A display apparatus according to claim 11, wherein a gap between the driving circuit connector and the panel connector is larger than a gap between a portion of the driving circuit, which is not in correspondence with the driving circuit connector, and the panel connector.

14. A display apparatus according to claim 11, wherein:

the anisotropic conductive material body is provided between the driving circuit and the display panel and between the driving circuit connector and the panel connector; and

a gap between the driving circuit connector and the panel connector is designed such that the conductive property provided by the conductive member existing in the gap is not changed to an insulating property; and

a gap between the portion of the driving circuit, which is not in correspondence with the driving circuit connector, and the panel connector is designed such that the conductive property provided by the conductive member existing in the gap is changed to an insulating property.

15. A display apparatus according to claim 11, wherein the panel connector has a recessed portion facing the driving circuit connector.

16. A display apparatus according to claim 11, wherein:

the plurality of conductive members each includes a plurality of insulating particles and a conductive plating cover for covering the plurality of insulating particles; and

the change in the at least one conductive member includes breakage of the conductive plating cover of the at least one conductive member.

17. A display apparatus according to claim 11, wherein the change in the at least one conductive member includes division of the at least one conductive member.

18. A conductive member, wherein at least a surface of the conductive member is conductive, and the conductive member is changed by a force applied thereto, such that the conductive property of an anisotropic conductive material body forming the conductive member is changed to an insulating property.

19. A conductive member according to claim 18, which is divided by a force applied thereto.

20. A conductive member, comprising:

a plurality of insulating particles; and

a conductive plating cover for covering the plurality of insulating particles;

wherein at least a surface of the conductive member is conductive, and the conductive member is changed by a force applied thereto, and the conductive plating cover is broken when a force is applied to the conductive member.

21. A conductive member according to claim 20, which is a conductive particle, wherein the conductive particle has a diameter of 10 to 20 μ

m inclusive, and the plurality of insulating particles each have a particle diameter of 2 to 5 μ

m.