A production method of back aluminum paste with low printing wet weight

A production method and low-printing technology, applied in the manufacture of electrical components, circuits, cables/conductors, etc., can solve the problems of aluminum bud generation, reduce the wet weight of aluminum paste printing, reduce the number of rolling, save consumption, improve quality effect

Active Publication Date: 2015-10-28
JIANGSU RUIDE NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reducing the printing wet weight of aluminum paste can easily lead to the formation of aluminum buds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The present invention is a kind of back aluminum slurry production method of low printing wet weight, and it comprises following basic steps:

[0024] S1. Prepare a wetting and dispersing agent solution: dissolve the wetting and dispersing agent-modified acrylate block copolymer in ethanol to prepare a wetting and dispersing agent solution with a mass fraction of 5%;

[0025] S2. Mix the solid powder: mix the aluminum powder of 60 parts by weight and the glass powder of 0.5 parts by weight in a mixer evenly to obtain a powder mixture;

[0026] S3. Pretreatment powder mixture: atomize the wetting agent and dispersant solution with an atomization device, and spray the atomized liquid on the surface of the powder mixture at a spray speed of 120ml / min into the mixer, and the powder is mixed during the atomization spraying process The material is continuously stirred at a stirring speed of 70rpm. When the spraying amount of the wetting and dispersing agent solution reaches 1...

Embodiment 2

[0031] The present invention is a kind of back aluminum slurry production method of low printing wet weight, and it comprises following basic steps:

[0032] S1. Prepare the wetting and dispersing agent solution: dissolve the wetting and dispersing agent long-chain polyamine amide in ethanol to make a wetting and dispersing agent solution with a mass fraction of 20%;

[0033] S2. mixing solid powder: mixing 60 parts by weight of aluminum powder and 7 parts by weight of glass powder in a mixer to obtain a powder mixture;

[0034] S3. Pretreatment powder mixture: atomize the wetting agent and dispersant solution with an atomization device, the atomized liquid enters the mixer and sprays it on the surface of the powder mixture at a spray speed of 30ml / min, and the powder is mixed during the atomization spraying process The material is continuously stirred at a stirring speed of 30rpm. When the spraying amount of the wetting and dispersing agent solution reaches 30% of the mass of...

Embodiment 3

[0039] The present invention is a kind of back aluminum slurry production method of low printing wet weight, and it comprises following basic steps:

[0040] S1. Prepare the wetting and dispersing agent solution: dissolve the wetting and dispersing agent unsaturated polycarboxylic acid polymer in ethanol to make a wetting and dispersing agent solution with a mass fraction of 10%;

[0041] S2. Mixing solid powder: mixing 70 parts by weight of aluminum powder and 4 parts by weight of glass powder in a mixer to obtain a powder mixture;

[0042] S3. Pretreatment powder mixture: atomize the wetting agent and dispersant solution with an atomization device, and the atomized liquid enters the mixer and sprays it on the surface of the powder mixture at a spray speed of 60ml / min. During the atomization and spraying process, the powder is mixed The material is continuously stirred at a stirring speed of 45rpm. When the spraying amount of the wetting and dispersing agent solution reaches ...

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Abstract

The invention relates to a method for producing aluminum-back paste with low printing wet weight. The method comprises the following basic steps of S1, preparing wet dispersant solutions, S2, mixing solid powder, S3, preprocessing powder mixtures, S4, preparing organic carriers, S5, carrying out mixing, and S6 carrying out grinding. Compared with the prior art, the method for producing the aluminum-back paste can spray the wet dispersant solutions in an atomizing method, so that fewer wet dispersants can be used for evenly wetting the surfaces of aluminum powder, glass powder and the like, the wetting property of the aluminum powder, the glass powder and the like is improved, fluidity of the glass powder, especially the aluminum powder is enhanced under the low printing wet weight condition, generation of aluminum bracts under the low printing wet weight condition can be effectively avoided, and therefore low printing wet weight is achieved. The producing method is good in wetting effect, meanwhile, the number of times of rolling the paste is reduced to 3-4 from conventional 5-10, production efficiency is improved, and the using quantity of the wet dispersants is reduced.

Description

technical field [0001] The invention relates to back aluminum paste, in particular to a production method of back aluminum paste with low printing wet weight. Background technique [0002] A high-quality and efficient aluminum paste product with high cost performance. To reduce the cost of aluminum paste, one of the main ways is to reduce the printing wet weight. In addition, due to the large difference between the expansion coefficients of silicon and aluminum, excessive printing wet weight will increase the warpage of the sintered cell; and the current development trend is that the thickness of the silicon wafer used is getting thinner and thinner, resulting in Warping of thin silicon wafers will be more serious. Reducing the cost of aluminum paste and overcoming the warpage of silicon wafers requires reducing the printing wet weight of aluminum paste as much as possible. However, reducing the printing wet weight of aluminum paste can easily lead to the production of al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00
Inventor 戈士勇
Owner JIANGSU RUIDE NEW ENERGY TECH
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