Front dielectric paste and preparation method thereof

A medium slurry and slurry technology, applied in the manufacture of ships or lead wires, etc., can solve the problems of poor acid etching, no acid etching, increasing the difficulty of bonding process, etc., and achieve the effect of moderate etching rate

Inactive Publication Date: 2012-08-29
安徽鑫昊等离子显示器件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The industry usually considers the use of acid etching to remove the pre-dielectric slurry, but the existing pre-dielectric slurry usually does not have acid etching or poor acid etching, which greatly increases the difficulty of the subsequent Bonding process

Method used

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  • Front dielectric paste and preparation method thereof
  • Front dielectric paste and preparation method thereof

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preparation example Construction

[0025] The embodiment of the present invention discloses a method for preparing a pre-medium slurry, including:

[0026] a) Preparation of carrier

[0027] After the acrylic resin and terpineol are evenly mixed, the first filtration is carried out, the mixing ratio of the acrylic resin and the terpineol is 1:4.5-6 by weight, and the carrier is obtained after the first filtration;

[0028] b) Preparation of slurry

[0029] The second filtration is performed after the carrier is mixed with glass powder, and the glass powder includes: 30wt%-40wt% of B 2 o 3 , 40wt% to 50wt% of ZnO and 10wt% to 20wt% of SiO 2 , the mixing ratio of the carrier and the glass powder is 1:1-2 by weight, and the first slurry is obtained after the second filtration;

[0030] c) Vacuum defoaming

[0031] The first slurry is subjected to vacuum defoaming to obtain a pre-medium slurry.

[0032] Step a is the process of preparing the carrier. The reason why the present invention uses acrylic resin as ...

Embodiment 1

[0045] 1. Use acetone to clean the slurry tank at 50°C to 55°C for 2 hours.

[0046] 2. After adding terpineol to the slurry tank, add acrylic resin, wherein the weight ratio of acrylic resin to terpineol is 1:4.928, the total amount of the two is 1000l, and the mixed solution is heated to 120°C and kept for 3min. Fill the slurry tank with nitrogen, then lower the temperature of the mixed liquid in the slurry tank to 70°C, filter the solution in the slurry tank with a filter element with a filtration accuracy of 10 μm, and obtain the carrier after filtration. After testing, the viscosity is 3400mPa·s.

[0047] 3. Add the carrier prepared in step 2 into the mixer, add glass powder and stir for 30 minutes during the stirring process, wherein the glass powder includes: 35wt% B 2 o 3 , 45wt% ZnO and 20wt% SiO 2 , the particle size is 3.0 μm, the weight ratio of the glass powder and the carrier is 1:1.2794, the total amount is 25l, then the slurry is added to the dispersant, the...

Embodiment 2

[0051] 1. Use acetone to clean the slurry tank at 50°C to 55°C for 2 hours.

[0052] 2. After adding terpineol to the slurry tank, add acrylic resin, wherein the weight ratio of acrylic resin to terpineol is 1:4.55, the total amount of the two is 1000l, and the mixed solution is heated to 115°C and kept for 3min. Fill the slurry tank with nitrogen, then lower the temperature of the mixed liquid in the slurry tank to 70°C, filter the solution in the slurry tank with a filter element with a filtration accuracy of 8 μm, and obtain the carrier after filtration. After testing, the viscosity is 3760mPa·s.

[0053] 3. Add the carrier prepared in step 2 into the mixer, add glass powder and stir for 30 minutes during the stirring process, wherein the glass powder includes: 32wt% B 2 o 3 , 48wt% ZnO and 20wt% SiO 2 , the particle size is 2.0 μm, the weight ratio of the glass powder and the carrier is 1:1.1647, the total amount is 25l, then the slurry is added to the dispersant, the c...

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Abstract

The invention provides a preparation method of front dielectric paste, comprising the following steps of: uniformly mixing acrylic resin with terpilenol, then carrying out first filtration, wherein the mixing proportion of the acrylic resin and the terpilenol is 1:4.5-6 by weight, and a carrier is obtained after carrying out the first filtration; mixing the carrier with glass powder, then carrying out second filtration, wherein the glass powder comprises the following components in percentage by weight: 30-40% of B2O3, 40-50% of ZnO and 10-20% of SiO2, the mixing proportion of the carrier andthe glass powder is 1:1-2 by weight, and first paste is obtained after carrying out the second filtration; and carrying out vacuum defoamation on the first paste so as to obtain the front dielectric paste. The invention also provides the front dielectric paste. The front dielectric paste has acid etching property and is etched by nitric acid with the concentration of 6 percent by weight at the speed of 10-20 mum / minute, thereby being convenient for a subsequent Bonding process.

Description

technical field [0001] The invention relates to the field of plasma display screens, in particular to a front dielectric slurry and a preparation method thereof. Background technique [0002] The flat-panel display industry is a key development industry during my country's "Eleventh Five-Year Plan" period, and it is also a springboard for the upgrading of my country's electronic information industry. At present, my country's flat panel display industry is in a period of rapid development, and is also facing the challenge of technological innovation. [0003] With the continuous improvement of consumers' demand for display device functions and the advancement of technology, plasma display screens (PDP) gradually occupy a dominant position in the market. Plasma display screens are developed after cathode ray tubes (CRT) and liquid crystal displays (LCD). As a new type of direct-view image display device, PDP is widely used in the preparation of high-quality video display equi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/24
Inventor 刘君民
Owner 安徽鑫昊等离子显示器件有限公司
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