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A kind of electrode silver paste for functional ceramics and preparation method thereof

A technology for functional ceramics and electrodes, which is applied in the field of electrode silver paste for functional ceramics and its preparation, can solve the problems of affecting the carrier transport at the ceramic interface, the inability to guarantee the service stability of the device, and the loss of wettability, so as to improve the sintered metal layer. Current-carrying capacity, improved interface bonding strength, and low residual components in debonding

Active Publication Date: 2021-08-27
SINO PLATINUM METALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the glass transition layer is too thick, it will affect the carrier transport at the ceramic interface, and at the same time lose the wettability with the solder paste, and the solderability will be poor; if the glass transition layer is too thin, it will affect the solder resistance, and the stability of the device cannot be guaranteed. Higher requirements are placed on the performance of silver paste materials

Method used

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  • A kind of electrode silver paste for functional ceramics and preparation method thereof
  • A kind of electrode silver paste for functional ceramics and preparation method thereof
  • A kind of electrode silver paste for functional ceramics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] An electrode silver paste for functional ceramics, which consists of the following raw material components in mass percentage: 85wt% silver-based mixture, 0.8wt% lead-free glass powder, 1wt% phase-forming compound, and 13.2wt% organic carrier;

[0035] Add 5wt% ethyl cellulose to 87wt% terpineol and butyl carbitol mixed solvent, its volume ratio V:V=l:3, stir at a constant temperature of 70°C until it dissolves completely, stir and cool to room temperature, add 8wt %lecithin, Span-85 and rosin mass ratio W:W:W=1:1:0.5, dispersed at high speed for 15 minutes, and ultrasonically filtered to obtain a uniformly dispersed organic vehicle.

[0036] Weigh the raw materials according to the following mass percentage: the range of 20wt% flake silver powder has a tap density of 4.0g / cm 3 , DMAX≤5μm, burning loss≤1%, specific surface area 0.7m 2 / g, the range of 60wt% spherical silver powder tap density 4.7g / cm 3 , average particle size 3.0μm, burning loss ≤ 1%, specific surface...

Embodiment 2

[0040] An electrode silver paste for functional ceramics, comprising the following components in mass percentage:

[0041] 76wt% silver mixture, 1.8wt% lead-free glass powder, 0.2wt% phase-forming compound, 22wt% organic vehicle.

[0042] 6wt% ethyl cellulose and phenolic resin mass ratio W:W=5:1 are added in 90wt% terpineol and butyl carbitol mixed solvent, its volume ratio V:V=3:l, constant temperature 70 ℃ Stir until it is completely dissolved, stir and cool to room temperature, add 4wt% lecithin, castor oil and organic wax at a mass ratio of W:W:W=1:1:0.5, disperse at high speed for 15 minutes, and ultrasonically filter to obtain a uniformly dispersed organic vehicle .

[0043] Weigh raw materials according to the following mass percentage: 70wt% spherical silver powder, tap density 4.5g / cm 3 , average particle size 2.8μm, specific surface area 1.0m 2 / g, 6wt% silver carbonate, 1.8wt% lead-free glass softening point 610°C, average particle size 2 O, 22 wt% organic vehic...

Embodiment 3

[0047] An electrode silver paste for functional ceramics, which consists of the following raw material components in mass percentage: 65wt% silver-based mixture, 1.2wt% lead-free glass powder, 0.5wt% phase-forming compound, and 33.3wt% organic carrier;

[0048] Add 8wt% ethyl cellulose to 89wt% butyl carbitol and DBE mixed solvent, its volume ratio V:V=2:l, stir at a constant temperature of 70°C until it dissolves completely, stir and cool to room temperature, add 3wt% lecithin , castor oil and sodium hexametaphosphate mass ratio W:W:W=2:1:1, disperse 15min under the high rotating speed, and obtain the evenly dispersed organic carrier by ultrasonic filtration, take raw material by the following mass percentage:

[0049] The range of 14wt% flake silver powder Tap density 1.4g / cm 3 , DMAX≤10μm, burning loss≤1%, specific surface area 1.5m 2 / g; 44wt% range of spherical silver powder tap density 3.7g / cm 3 , average particle size 1.7μm, burning loss ≤ 1%, specific surface area 1....

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Abstract

The invention discloses an electrode silver paste for functional ceramics and a preparation method thereof. The electrode silver paste consists of a silver-based mixture with a mass percentage of 55-85wt%, 0.8-1.8wt% lead-free glass powder, 0.1-1wt% % phase-forming compound and 13-44wt% organic vehicle, the main point of the preparation method is to pre-mix a part of the organic vehicle with lead-free glass powder and phase-forming compound to form a slurry, grind and disperse through a grinder, and add all the silver The mixture is ground until the slurry fineness is less than 5 μm, mixed with the remaining organic carrier, double-planetary stirring and defoaming to obtain an electrode silver paste for functional ceramics. The present invention finally realizes high carrier mobility, strong adhesion, thermal expansion matching, assembly reliability, environmental stability and cost economy of the functional ceramic metallization layer by solving the sintering density of the metallization layer and the control of the structure of the glass phase interface , which can meet the production process requirements of printing, dipping, spraying and drop hole.

Description

technical field [0001] The invention relates to the technical field of information electronic materials, in particular to an electrode silver paste for functional ceramics and a preparation method thereof. Background technique [0002] With the rapid development of information microelectronics towards miniaturization and three-dimensional integration, especially in my country's information construction, the need for new electronic components with high frequency, small size, high energy and large capacity is becoming more and more urgent. With the advent of the 5G era, 5G base stations are densely deployed. The filter used in 5G base stations is the core radio frequency device of the base station. It has the characteristics of small size, large Q value, low insertion loss, good stability, and high power withstand. The filter fully covers the silver paste electrode layer on the surface of the functional ceramic and welds it with the circuit board. After DC high-voltage polariz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22H01B13/00
CPCH01B1/22H01B13/00
Inventor 李俊鹏左川黄少文李世鸿王珂原野李燕华
Owner SINO PLATINUM METALS CO LTD
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