Nanometer silver paste for terminal electrode of multi-layer ceramic capacitor and method for preparing same

A nano-silver paste, multi-layer ceramic technology, applied in the direction of fixed capacitor terminal, fixed capacitor parts, conductive materials dispersed in non-conductive inorganic materials, etc., can solve problems such as insufficient yield of finished products and reduce production. Cost, environmental protection, smooth surface effect

Inactive Publication Date: 2009-11-18
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the electrode pastes for multilayer ceramic capacitors in my country still rely on imports, and the preparation technology of electrode silver paste for domestic multilayer ceramic capacitor electrode pastes has not yet made a breakthrough, and the performance of the pastes is still comparable to that of foreign manufacturers. There is a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The preparation method of the nano-silver paste according to the above-mentioned component ratio is as follows:

[0029] 1) Powder mixing: Mix silver powder with a particle size of 10-100nm and titanium boroaluminosilicate glass powder together, use absolute ethanol as a carrier, and mix for 3-10 hours with a ball mill or a ball grinder;

[0030] 2) Powder drying: Dry the mixed silver powder and titanium borosilicate glass powder at 40-80°C for 1-2 hours, then cool naturally to room temperature;

[0031] 3) Preparation of organic vehicle: Add polyacrylic acid resin to ethyl acetate or ethyl acetate, and dissolve polyacrylic acid resin completely at constant temperature in a water bath at 60-80°C, and then cool to room temperature. Among them, polyacrylic acid resin : The mass ratio of ethyl acetate or ethyl acetate is 40~70:30~60; polyacrylic resin is polymethyl acrylate, polyethyl acrylate, polymethyl methacrylate with molecular weight between 10000~15000 species or sev...

Embodiment 1

[0036] First weigh 60g of nano-silver powder with a particle size of 10-100nm, then weigh 4g of titanium borosilicate glass powder, then mix the weighed nano-silver powder and titanium borosilicate glass powder together, and use Use water and ethanol as a carrier, mix with a ball mill or a ball mill for 4 hours; dry the mixed nano-silver powder and titanium boroaluminosilicate glass powder at 60°C for 1.5 hours, and then cool at room temperature;

[0037] Weighed 65 g of polymethyl acrylate with a molecular weight of 12000 and added it to 35 g of ethyl acetate, completely dissolved the polyacrylic resin in a water bath at a constant temperature of 65° C., and then cooled to room temperature.

[0038] Weigh 30g of the aforementioned organic vehicle and 1g of dispersant DP270, 2.5g of antifoaming agent polysiloxane, 3.5g of surfactant Span-60 (Span-60) and add it to the silver powder and boroaluminosilicate titanium In the mixture of glass powder, fully stir with a planetary mix...

Embodiment 2

[0041] First weigh 45g of nano-silver powder with a particle size of 10-100nm, then weigh 10g of titanium borosilicate glass powder, then mix the weighed nano-silver powder and titanium borosilicate glass powder together, and use Use water and ethanol as a carrier, mix with a ball mill or a ball grinder for 4.5 hours; dry the mixed nano-silver powder and lead-free glass powder at 70°C for 1 to 3 hours, and then cool at room temperature;

[0042] Weigh 70g of poly(ethyl acrylate) with a molecular weight of 13,000 and add it to 60g of ethyl acetate, completely dissolve the poly(acrylic acid) resin in a water bath at a constant temperature of 65°C, and then cool to room temperature.

[0043] Weigh 40g of the above-mentioned organic vehicle and 1g of dispersant sodium dodecylsulfonate, 2g of antifoaming agent calcium carbonate, and 2g of surfactant di-tert-butylhydroxytoluene and add them to the aforementioned nano-silver powder and lead-free glass In the powder mixture, fully sti...

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Abstract

The invention belongs to the technical field of electronic and micro-electronic materials, and particularly relates to a nanometer silver paste for a terminal electrode of a multi-layer ceramic capacitor and a method for preparing the same. The nanometer silver paste is prepared from the following components by mass percentage: 45 and 80 percent of silver powder of which the grain diameter is between 10 and 100nm, 10 to 40 percent of organic carrier, 1 to 10 percent of boron aluminum titanium silicate glass powder, 1 to 9 percent of dispersant, 0.5 to 9 percent of defoamer and 0.5 to 8 percent of surface active agent, wherein the organic carrier is an ethyl acetate or ethyl acetate system of polyacrylic resin, and the molecular weight of the polyacrylic resin is between 10,000 and 15,000. In the process of producing and processing the paste, no hazard exists, which facilitates environmental protection; the boron aluminum titanium silicate glass powder and the ceramic substrate of the corresponding multi-layer ceramic capacitor are almost the same or similar in physical property, so that the boron aluminum titanium silicate glass powder and the ceramic substrate of the corresponding multi-layer ceramic capacitor can be formed by co-sintering for one time.

Description

technical field [0001] The invention belongs to the technical field of electronics and microelectronic materials, in particular to a nano-silver paste used for terminal electrodes of multilayer ceramic capacitors and a preparation method thereof. Background technique [0002] With the rapid development of new materials, new processes and new science and technology, microelectronic materials have also been developed rapidly, and are getting closer and closer to people's daily life. As an indispensable part of microelectronic materials, thick film process technology forms integrated circuits or electronic components in the form of thick film screen printing with various components (such as micro resistors, micro capacitors, etc.) with different electrical properties. Thus forming microelectronic products with high integration, stable performance and low price. [0003] Electrode paste in electronic paste is a material for preparing functional electrodes of thick-film circuits...

Claims

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Application Information

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IPC IPC(8): H01G4/228H01B1/02H01B1/16H01B1/22
Inventor 张宇阳
Owner IRICO
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