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Carrier special for front silver paste for printing fine lines step by step and preparation method

A special carrier, silver paste technology, used in cable/conductor manufacturing, semiconductor devices, conductive materials dispersed in non-conductive inorganic materials, etc. problems, to achieve the effect of improving adhesion performance, FF improvement, and solving line width problems

Active Publication Date: 2020-03-13
上海银浆科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In traditional screen printing, due to the influence of the rheology and thixotropy of the slurry, the printing height of the auxiliary grid is often increased at the expense of the width of the auxiliary grid; It will directly affect the over-ink amount of the printing paste, which also limits the height of the printed paste, so a single printing can no longer meet the requirements

Method used

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  • Carrier special for front silver paste for printing fine lines step by step and preparation method

Examples

Experimental program
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Effect test

preparation example Construction

[0019] The preparation process of this organic carrier is:

[0020] 1. Weigh according to the formula range of the carrier, first weigh the raw materials used for the organic carrier and place them in a stainless steel heating kettle with a high-speed shear stirring head;

[0021] 2. Seal the heating kettle, start the high-speed shear stirring head in the stainless steel heating kettle, so that the shear rate is 1000 rpm; at the same time, start the heating button, and heat the organic mixture to 60 °C at a heating rate of 5 °C / min. ℃, and keep warm for 2h;

[0022] 3. Turn off the high-speed shear stirring head and the heating button, and place the carrier for 24 hours to fully cool it;

[0023] 4. Take the cooled carrier out of the heating kettle, and pass it through a 1000-mesh stainless steel screen for negative pressure filtration;

[0024] 5. Seal the filtered carrier and store it at 25±5°C and 40-60% humidity.

[0025] The composition of organic carrier V2 includes t...

Embodiment example 1

[0034] According to the formula range of organic carrier V1, Dow STD-4 ethyl cellulose 12%, phenolic modified rosin resin 3.5%, Span 85 2.6%, butyl carbitol acetate 45%, dipropylene glycol methyl ether acetate 16%. Prepare the finished carrier V1 according to the preparation procedure of the organic carrier.

[0035] According to the formulation range of the organic carrier V2, PVB 2.4%, TDO 4.0%, diethylene glycol dibutyl ether 7.7%, propylene glycol butyl ether 2.2%, and dibutyl phthalate 4.6%, prepare the finished carrier according to the preparation process of the organic carrier V2.

[0036] According to the formula range of the special carrier, the organic carrier V1 is 60%, and the organic carrier V2 is 40%, and the special carrier 1 for the front silver paste for the ultra-fine line step-by-step printing is prepared.

[0037] Then 8.7% special carrier, 2.5% glass powder, 87.8% silver powder, and 1% silicone oil are printed, sintered and tested for terminal performanc...

Embodiment example 2

[0039] According to the formula range of organic carrier V1, Dow STD-4 ethyl cellulose 10%, phenolic modified rosin resin 3.2%, Span 85 2.0%, butyl carbitol acetate 50%, dipropylene glycol methyl ether acetate 14.8%. Prepare the finished carrier V1 according to the preparation procedure of the organic carrier.

[0040] According to the formula range of organic carrier V2, PVB 2.0%, TDO 4.0%, diethylene glycol dibutyl ether 6.5%, propylene glycol butyl ether 2.5%, and dibutyl phthalate 5.0%, prepare the finished carrier according to the preparation process of organic carrier V2.

[0041] According to the formula range of the special carrier, the organic carrier V1 is 60%, and the organic carrier V2 is 40%, and the special carrier 2 for the front silver paste for step-by-step printing of thin lines is prepared. Then 8.7% special carrier, 2.5% glass powder, 87.8% silver powder, and 1% silicone oil are printed, sintered and tested for terminal performance according to the applic...

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Abstract

The invention relates to the technical field of electronic materials, and discloses a carrier special for front silver paste for printing fine lines step by step. The carrier consists of two organic carriers and is a binary mixed carrier. A conventional carrier cannot meet the requirement of step-by-step printing for a first layer of film, so that the carrier special for the front silver paste forprinting fine lines step-by-step is prepared and can satisfy the strength and connectivity of the first layer of film and the grabbing force of the film to a silicon substrate in the step-by-step printing. The front silver paste prepared by the method can reduce the unit consumption, has good linetype after being sintered, and has higher filling factor and high photoelectric conversion efficiency. The invention also discloses a preparation method of the special carrier.

Description

technical field [0001] The invention belongs to the technical field of solar cell front paste, and relates to a binary organic carrier, in particular to a special carrier for front silver paste for step-by-step printing of fine lines and a preparation method thereof. Background technique [0002] With the depletion of non-renewable resources such as oil and coal, and the enhancement of people's awareness of environmental protection, the development of new energy has attracted more and more attention, especially the development and utilization of solar energy has become a hot spot. The front silver paste plays a vital role in solar cells. With the application of crystalline silicon solar cells in the market more and more widely, the requirements for the photoelectric conversion efficiency of solar cells are getting higher and higher, and at the same time, higher requirements are put forward for the printability of the silver paste on the front side of solar cells. [0003] U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00H01L31/0224
CPCH01B1/22H01B13/00H01L31/022425Y02E10/50
Inventor 王亮陈小龙刘洁乔亮
Owner 上海银浆科技有限公司
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