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Environment-friendly lead-free semiconductor ceramic capacitive electrode silver paste and preparation method thereof

A ceramic capacitor and semiconductor technology, applied in fixed capacitor electrodes, cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, etc., can solve problems such as large loss tangent value, poor printing performance, dull silver surface, etc. , to achieve the effect of reducing the loss tangent value, good weldability, and increasing capacitance

Active Publication Date: 2012-07-11
广东羚光新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For these new requirements, domestic pastes generally have disadvantages such as poor printing performance, low capacitance, large loss tangent, and dull silver surface.

Method used

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  • Environment-friendly lead-free semiconductor ceramic capacitive electrode silver paste and preparation method thereof
  • Environment-friendly lead-free semiconductor ceramic capacitive electrode silver paste and preparation method thereof
  • Environment-friendly lead-free semiconductor ceramic capacitive electrode silver paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This example is a production example of silver paste for semiconductor ceramic capacitors. Follow these steps:

[0038] (1) Preparation of glass powder

[0039] Batching according to the following mass percentages:

[0040] B 2 o 3 20wt%, SiO 2 15wt%, Bi 2 o 3 60wt%, Al 2 o 3 3.5wt%, inorganic additive cerium oxide 1.5%.

[0041] Mix the above ingredients evenly with a pot mill, preheat at 450°C for 30 minutes, melt at 1200°C for 60 minutes, quench, ball mill until the particle size is less than 15 μm, filter and dry.

[0042] (2) Preparation of organic carrier

[0043] Taking the total amount of organic carrier as 100%, the ingredients are formulated in the following mass percentages:

[0044] Ethylcellulose 20%,

[0045] Mixed solvent: terpineol 20%, diethylene glycol butyl ether 40%, diethylene glycol acetate 10%,

[0046] Organic additives: hydrogenated castor oil 1%, polyester modified polydimethylsilane 4%, diethyl phthalate 5%

[0047] After the...

Embodiment 2

[0055] This example is a production example of silver paste for semiconductor ceramic capacitors. Follow these steps:

[0056] (1), preparation of glass powder

[0057] Batching according to the following mass percentages:

[0058] B 2 o 3 30wt%, SiO 2 15wt%, Bi 2 o 3 50wt%, Al 2 o 3 3.5wt%, inorganic additive titanium dioxide 1.5%.

[0059] Mix evenly with a pot mill, preheat at 450°C for 30 minutes, melt at 1200°C for 60 minutes, quench, ball mill until the particle size is less than 15 μm, filter and dry.

[0060] (2) Preparation of organic carrier

[0061] Taking the total amount of organic carrier as 100%, the ingredients are formulated in the following mass percentages:

[0062] Ethylcellulose 15%,

[0063] Mixed solvent: terpineol 40%, diethylene glycol butyl ether 30%,

[0064] Organic additives: hydrogenated castor oil 1%, polyester modified polydimethylsilane 4%, diethyl phthalate 10%

[0065] After the above materials are mixed, heat and dissolve a...

Embodiment 3

[0073] This example is the method of using silver paste, taking the silver paste in Example 1 as an example:

[0074] 1. screen-print the silver paste prepared in Example 1 on the semiconductor ceramic capacitor substrate (note: standard printing conditions: mesh: 250 orders)

[0075] ②Drying condition: 230℃ for 3 minutes

[0076] ③Sintering conditions: Sintering temperature: 800℃~830℃.

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Abstract

The invention discloses a preparation method for an environment-friendly lead-free semiconductor ceramic capacitive electrode silver paste. The preparation method comprises the following steps of: (1) preparing glass powder, namely uniformly mixing the following components in percentage by mass: 20 to 30 percent of B2O3, 5 to 25 percent of SiO2, 50 to 70 percent of Bi2O3, 2 to 20 percent of Al2O3 and 1 to 2 percent of inorganic additive I, heating and ball-grinding until the particle size of the glass powder is less than 15 mu m, filtering and drying; (2) preparing an organic carrier; and (3) proportioning the following components in percent by mass: 50 to 75 percent of ultrathin silver powder, 4 to 10 percent of lead-free glass powder, 1 to 2 percent of inorganic additive II and 20 to 35 percent of organic carrier. The inorganic materials can meet a requirement of environment friendliness home and abroad; according to the adopted process, the stability and the consistency of the silver paste can be guaranteed; and the surface of a sintered silver layer is bright and compact, and has high continuity.

Description

technical field [0001] The invention relates to the technical field of silver paste for semiconductor ceramic capacitor electrodes. Background technique [0002] The silver paste for semiconductor ceramic capacitor electrodes is composed of ultra-fine silver powder, inorganic binder phase - lead-free glass powder, inorganic additives and organic carriers, and is the basic material of semiconductor ceramic capacitors. After screen printing, leveling, drying, sintering and other processes, the electronic silver paste is sintered on the substrate to form a conductive film to make semiconductor ceramic capacitor electronic components. [0003] In addition to the good printing performance of the paste, the semiconductor ceramic capacitor electrode also requires good electrical properties, solderability, and a dense, bright silver surface without holes or bubbles after printing. For these new requirements, domestic pastes generally have disadvantages such as poor printing perform...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B1/22H01B1/16H01G4/008
Inventor 谭汝泉王惠敏宋先刚朱登雷娄红涛陈林泉邱韬彭梅志张文秦朝军
Owner 广东羚光新材料股份有限公司
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