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A preparation process of nanoparticle composite film for welding

A composite material film and nanoparticle technology, which is applied in the field of preparation technology of nanoparticle composite material film for welding, can solve problems such as the preparation technology of nanoparticle composite material film for welding that have not been seen, and achieve uniform and lasting dispersion effect, mixing Reasonable sequence and simple process

Active Publication Date: 2019-06-21
SOLDERWELL MICROELECTRONIC PACKAGING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no public reports on the preparation process of nanoparticle composite membranes for welding.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation process of a nanoparticle composite material film for welding, which adopts a casting method, mainly includes the following steps:

[0032] (1) Material mixing: first mix 8g of nano-silver powder (average particle size of 20nm) with 30g of ethanol (solvent), then add 0.2g of dopamine (corrosion inhibitor), 0.1g of rosin (flux), and polyethyleneimine in sequence (dispersant) 0.1g, polyvinyl alcohol (film former) 1.2g, propylene glycol (plasticizer) 0.1g and methyl acrylate (viscosity modifier) ​​0.3g, each composition needs to be added at a power of 300W Stir in the ultrasonic wave for 60min until a uniform slurry is formed.

[0033] (2) Vacuum defoaming: place the slurry at a vacuum degree of -0.04MPa for defoaming for 30 minutes.

[0034] (3) Casting film formation: Spread the slurry evenly into a wet film of a certain thickness with a casting machine, the casting height is 0.10 mm, and the casting speed is 0.20 m / min.

[0035] (4) Drying and curing: dr...

Embodiment 2

[0039] A preparation process of a nanoparticle composite material film for welding, which adopts a casting method, mainly includes the following steps:

[0040] (1) Material mixing: first mix 8g of nano-silver powder (average particle size of 20nm) with 50g of acetone (solvent), then add 0.2g of dopamine (corrosion inhibitor), 0.1g of rosin (flux), and polyethyleneimine in sequence (dispersant) 0.1g, polyvinyl alcohol (film former) 1.2g, propylene glycol (plasticizer) 0.1g and methyl acrylate (viscosity modifier) ​​0.3g, each composition needs to be added at a power of 600W Stir in the ultrasonic wave for 30min until a uniform slurry is formed;

[0041] (2) Vacuum defoaming: place the slurry at a vacuum degree of -0.08MPa for defoaming for 20 minutes.

[0042] (3) Casting film formation: the slurry is uniformly spread into a wet film of a certain thickness with a casting machine, the casting height is 0.80 mm, and the casting speed is 0.50 m / min.

[0043] (4) Drying and curi...

Embodiment 3

[0047] A preparation process of a nanoparticle composite material film for welding, which adopts a casting method, mainly includes the following steps:

[0048] (1) Material mixing: first mix 8g of nano-silver powder (average particle size of 20nm) with 80g of ethyl acetate (solvent), then add 0.2g of dopamine (corrosion inhibitor), 0.1g of rosin (flux), polyethylene Imine (dispersant) 0.1g, polyvinyl alcohol (film forming agent) 1.2g, propylene glycol (plasticizer) 0.1g and methyl acrylate (viscosity modifier) ​​0.3g, after each composition is added, it needs to be Stir in a 1000W ultrasonic wave for 5 minutes until a uniform slurry is formed;

[0049] (2) Vacuum defoaming: place the slurry under the condition of vacuum degree of -0.1 MPa for defoaming for 5 minutes.

[0050] (3) Casting film formation: the slurry is uniformly spread into a wet film of a certain thickness with a casting machine, the casting height is 2.0 mm, and the casting speed is 1.0 m / min.

[0051] (4) ...

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Abstract

The invention relates to the technical field of preforming welding material, and particularly discloses a preparation technique of a nanoparticle composite material film for welding; the technique includes steps of material mixing-vacuum defoamation- curtain coating and film formation-drying and curing-after-treatment. The preparation technique is featured by simple and feasible practice, strong controllability, high efficiency, and low cost; the technique can effectively guarantee the component of the prepared nanoparticle composite material film, uniform and stable dimension, excellent processing performance and high reliability of low-temperature sintering and welding; the preparation technique can be widely applied to the field of preforming welding material.

Description

technical field [0001] The invention relates to the technical field of preformed solder, in particular to a preparation process of a nano particle composite material film for welding. Background technique [0002] In recent years, solder paste, especially nano-silver solder paste, has been used as a semi-solid soldering material for electronic packaging because of its good thermal conductivity, electrical conductivity, high temperature resistance and low temperature sintering, etc. ) The field of packaging has attracted much attention. However, cream solder contains a lot of solvent components. Solvent volatilization during heating, or gas released during sintering reaction, will lead to the formation of voids in the solder layer, which will affect the soldering strength and the thermal conductivity and electrical conductivity of the solder layer. In addition, solder paste generally needs to be stored at low temperature, and it needs to go through complex processes such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L79/02C08L93/04C08K13/02C08K3/08C08K5/101C08K5/18C08J5/18
CPCC08J5/18C08J2329/04C08J2479/02C08J2493/04C08K2201/011C08L29/04C08L2203/16C08L2205/03C08L79/02C08L93/04C08K13/02C08K2003/0806C08K5/101C08K5/18
Inventor 李志豪何天贤黄耀林
Owner SOLDERWELL MICROELECTRONIC PACKAGING MATERIALS CO LTD
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