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Low-temperature environment-friendly conductive silver paste and its preparation method and application

A conductive silver paste, environmentally friendly technology, applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problems of poor conductivity, poor adhesion between conductive silver paste and substrates, etc. Achieve high conductivity, easy control of process conditions, and improved performance

Active Publication Date: 2018-01-02
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, provide a kind of low-temperature environment-friendly conductive silver paste and its preparation method and the application of the low-temperature environment-friendly conductive silver paste, to solve the poor conductivity of the existing low-temperature conductive silver paste, and its Technical problem of poor adhesion between conductive silver paste and substrate

Method used

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  • Low-temperature environment-friendly conductive silver paste and its preparation method and application
  • Low-temperature environment-friendly conductive silver paste and its preparation method and application
  • Low-temperature environment-friendly conductive silver paste and its preparation method and application

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preparation example Construction

[0030] Correspondingly, on the basis of the aforementioned low-temperature environmentally friendly conductive silver paste, the embodiment of the present invention also provides a method for preparing the low-temperature environmentally friendly conductive silver paste of the present invention. In one embodiment, the preparation method of the low-temperature environmentally friendly conductive silver paste includes the following steps:

[0031] S01: Weigh each component according to the components contained in the low-temperature environmentally friendly conductive silver paste of the present invention;

[0032] S02: Perform a first mixing process on the weighed organic carrier and the flaky silver powder to prepare a first mixture;

[0033] S03: Perform a second mixing process on the weighed ultrafine silver and the first mixture to prepare a second mixture;

[0034] S04: Perform a third mixing process on the weighed additive and the second mixture to prepare a third mixture;

[0035...

Embodiment 1

[0045] This embodiment provides a low-temperature environment-friendly conductive silver paste, which is composed of an organic carrier, flake silver powder, ultrafine silver powder, silane coupling agent and putty powder.

[0046] The preparation method is as follows:

[0047] S11: Weigh 10g of polyester resin and dissolve it in 45g of propylene glycol methyl ether acetate, heat it at a constant temperature at 60°C and stir until it is completely dissolved, filter and cool to obtain an organic carrier;

[0048] S12: Weigh 55g of flake silver powder with an average size of 2μm and dissolve it into the aforementioned 28g organic carrier, stir it with a mixer until it is evenly mixed to obtain a silver powder mixture (1); weigh 25g of ultrafine silver powder with an average particle size of 20nm and add it to the The silver powder mixture (1) is fully stirred with a mixer until the mixture is uniform to obtain the silver powder mixture (2).

[0049] S13: Weigh 0.2g of silane coupling ag...

Embodiment 2

[0053] This embodiment provides a low-temperature environment-friendly conductive silver paste, which is composed of an organic carrier, flake silver powder, ultrafine silver powder, silane coupling agent and putty powder.

[0054] The preparation method is as follows:

[0055] S21: Weigh 10 g of polyester resin and dissolve it in 35 g of ethylene glycol ethyl ether acetate solvent, heat and stir at a constant temperature at 60° C. until it is completely dissolved, and obtain an organic carrier through filtration and cooling.

[0056] S22: Weigh 48g of flaky silver powder with an average size of 2μm and dissolve it into the aforementioned 32g of organic carrier, stir thoroughly with a blender until the mixture is mixed to obtain a silver powder mixture (1); weigh 18g of ultrafine silver powder with an average particle size of 20nm and add it to The silver powder mixture (1) is fully stirred with a mixer until the mixture is uniform to obtain the silver powder mixture (2).

[0057] S23...

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Abstract

The invention discloses a low-temperature environment-friendly conductive silver paste, a preparation method and application thereof. The low-temperature environment-friendly conductive silver paste of the present invention is composed of 45-55% of flake silver powder, 10-25% of superfine silver powder, 20-35% of organic carrier, and 2-10% of additives in mass percentage. The low-temperature environment-friendly conductive silver paste of the invention has low-temperature curing, high conductivity and strong adhesion performance with bonding substrates, thereby expanding its application range. The preparation method of the low-temperature environment-friendly conductive silver paste of the present invention is easy to control the mixing treatment process conditions, has low equipment requirements, effectively ensures the stability of the performance of the low-temperature environment-friendly conductive silver paste of the present invention, improves its production efficiency, and reduces its production cost.

Description

Technical field [0001] The invention belongs to the field of microelectronic connection materials, and specifically relates to a low-temperature environment-friendly conductive silver paste, a preparation method thereof, and application of the low-temperature environment-friendly conductive silver paste. Background technique [0002] In recent years, with the rapid development of the electronics industry, the demand for membrane switches, flexible printed circuit boards, electromagnetic shields, potentiometers, radio frequency identification systems, solar cells, etc. has increased rapidly, and conductive silver paste is used as the preparation of such electronic components. The development and application of key functional materials for devices have also received extensive attention. According to analysis, the conductive silver paste market alone has a market size of billions of dollars each year. In the rapid development of the information industry, slurry has an important pos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22H01B13/00
Inventor 邹继兆刘长黄远珊曾燮榕罗晴
Owner SHENZHEN UNIV
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