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Preparation method of composite microspheres, anisotropy conducting material and anisotropy conducting film

A technology of composite microspheres, microspheres, applied in conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, conductive layers on insulating carriers, etc., can solve wrinkles, metal-plated shell tightness and adhesion properties problems such as poor, cracking and peeling, to achieve the effect of tight conductive metal layer, solving poor contact and long service life

Active Publication Date: 2011-07-27
SUZHOU NANOMICRO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008]However, the deformation of the thicker soft layer can easily lead to deformation, wrinkling, cracking and peeling of the metal shell, and the service life and reliability of the product are reduced; in addition, in The tightness and adhesion of the metal-plated shell on the core or soft layer are poor, which also leads to product quality that cannot meet high application requirements. Subsequently, there are inventions that propose a resin core, a conductive metal layer, and a conductive metal layer and a resin core. The polymer layer in between, this scheme has obtained certain beneficial effect to the solution of aforesaid problem, makes the quality of product improved to a certain extent, but the diameter of resin inner core is not easy to make uniform, in addition, the tightness of metallized shell on the polymer layer Although the strength and adhesion performance have been improved to a certain extent, it still cannot meet the higher application requirements.

Method used

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  • Preparation method of composite microspheres, anisotropy conducting material and anisotropy conducting film

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Preparation of 6.7 μm matrix material microspheres, that is, the polymer core of the composite microspheres: take 13.1g of 26.0% polystyrene seed suspension aqueous solution with a particle size of 2.1 μm, 450g of deionized water, and 0.23g of 10% dodecylbenzenesulfonic acid The sodium aqueous solution was added into a 2000mL four-neck round bottom flask, nitrogen was introduced, stirred and heated to 60°C. Take 18.8g divinylbenzene, 123.8g 1,6-hexanediol diacrylate, 7.5g allyl methacrylate, 10.7g 10% sodium dodecylbenzenesulfonate aqueous solution, 165g deionized water, after mixing Stir with a homogeneous mixer and add to a four-neck round bottom flask. After stirring for 2 hours, the temperature was lowered to 40° C., and 0.2 g of 30% hydrogen peroxide was added. Take 1.1g of tert-butyl hydroperoxide, 0.3g of 10% sodium dodecylbenzenesulfonate aqueous solution, 65g of deionized water, mix them with a homogeneous mixer, add them to a four-neck round bottom flask, and...

Embodiment 2

[0047] The synthetic polymer is outside the microsphere of Example 1, that is, the outside of the polymer: get 400.0g15.4% of the microsphere suspension of Example 1 to remove small particles, 150g deionized water, add in a 2000mL four-necked round bottom flask, Introduce nitrogen, stir and heat to 70°C. Take 0.08g of sodium formaldehyde sulfoxylate, 0.36g of 10% sodium dodecylbenzenesulfonate aqueous solution, mix with 25.6g of deionized water to form a uniform solution, add 13.0g of the uniform solution into a round bottom flask. Take 0.11 g of tert-butyl hydroperoxide and mix it with 12.9 g of deionized water to form a uniform solution. Take 2.8g of methyl methacrylate, 11.5g of glycidyl methacrylate, and 0.03g of 1,6-hexanediol diacrylate, and mix them into a uniform monomer solution. Add 1.0 g of the above two aqueous solutions every 15 minutes, and at the same time add 1.3 g of the above monomer solution every 15 minutes. After the aqueous solution was added, the stirr...

Embodiment 3

[0049] Functionalization of the microspheres of Example 2: Take 100.0 g of the microsphere suspension of Example 2 and 200 mL of absolute ethanol, add them to a 500 mL round-bottom flask, stir magnetically to disperse, then take 50 mL of ethylenediamine, and add them to the round-bottom flask. Heat to 80°C for 12 hours. Cool the flask to 25° C., filter and separate to obtain functionalized microspheres, that is, functional parts are formed on the inner core, and the functional parts are composed of high molecular polymers and have functional groups.

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Abstract

The invention discloses a preparation method of composite microspheres, an anisotropy conducting material and an anisotropy conducting film, comprising the following steps: a macromolecular polymer core and at least one layer of metal conducting layer are prepared; at least one function part is arranged between the core and the metal conducting layer, wherein the function part is composed of a macromolecular polymer and is provided with a functional group; according to the function part, the metal conducting layer formed on microspheres and the microspheres tightly contact, have the advantages of stronger adhesive force and longer service life, are more reliable and can satisfy the higher application requirements, and the phenomena of breaking, wrinkling, stripping and the like can be almost avoided. Meanwhile, in the field of the electric connection of microelectrodes, the composite microspheres disclosed by the invention can solve the problem that the metal conducting layer of the composite microspheres has big possibility of breaking, wrinkling, stripping and the like, and also can better solve the problem of bad contact because of uneven hot pressing of microelectrodes.

Description

technical field [0001] The invention relates to a preparation method of electronic products, in particular to a composite microsphere and a preparation method of an anisotropic conductive material and an anisotropic conductive film using the composite microsphere. Background technique [0002] Anisotropic conductive materials are widely used in the field of electrical connection between microelectrodes of electronic equipment, and are mainly composed of insulating resin binders and composite microspheres dispersed in the insulating resin binder. The composite microspheres Performance is crucial. Composite microspheres are generally composed of an insulating core and a conductive metal shell. Initially, although the core has high hardness, it is not in good contact with the metal shell. The metal shell is easy to wrinkle, crack and fall off under pressure. In the hot-pressing process for electrical connection of micro-electrodes, due to uneven hot-pressing, it is easy to caus...

Claims

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Application Information

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IPC IPC(8): H01B5/14H01B1/22H01B13/00
Inventor 江必旺吴俊成陈荣姬朱咸浩
Owner SUZHOU NANOMICRO TECH CO LTD
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