Preparation method of micron polymer-based composite conductive gold balls

A composite conductive and polymer technology, used in metal processing equipment, transportation and packaging, can solve the problems of poor bonding fastness between the gold layer and the polymer matrix, endangering the life safety of operators, and uneven adsorption. Large-scale production, low production cost, and the effect of enhancing bond fastness
CN105478752AActive Publication Date: 2016-04-13DONGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGHUA UNIV
Publication Date
2016-04-13

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Abstract

The present invention relates to a preparation method of micron polymer-based composite conductive gold balls. The method comprises: dispersing polymer microparticles in water; then adding stabilizing agent; stirring to obtain polymer microparticle dispersion liquid; then adding an amino-modified reagent; mechanically stirring and reacting to obtain amino-modified polymer microparticles; ultrasonically dispersing in water; adding carboxylic acid-modified gold sol; magnetically stirring, washing, centrifuging and drying to obtain polymer microparticles overlapped with nanoparticles on the surface; ultrasonically dispersing in a cyanide-free gold growth solution; under a condition of 40-80 DEG C, ultrasonically or mechanically stirring and reacting, washing, centrifuging and drying to obtain the product. The preparation method in the present invention is environmentally friendly and is simple and convenient to operate, avoids the heavy and complicated pre-treatment process in the traditional chemical plating and solves the problems of interference of impurity ions such as tin and palladium and toxicity of chemical plating solution such as cyanide.
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Description

technical field

[0001] The invention belongs to the field of preparation of composite conductive gold balls, in particular to a preparation method of micron-scale polymer-based composite conductive gold balls. Background technique

[0002] Due to their unique properties, metal-coated polymer microspheres are widely used in biomedicine, catalysis, microelectronic devices, surface-enhanced Raman scattering (SERS) and other fields, and have attracted extensive attention in recent years. Among them, the excellent conductivity of gold (Au) can be used as the conductive particles of the anisotropic conductive film ACF material. ACF is a composite bonding material composed of conductive particles, binders, additives, etc. that conducts electricity in the Z-axis direction and insulates in the XY plane direction, thus becoming a green and environmentally friendly bonding method that replaces tin-lead soldering. It is widely used in the connection of fine microelectronic device circu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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