Macromolecular solution dispersing medium with complete combustion and volatilization for dispensing organic powder

A technology of polymer solution and dispersion medium, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of no evaluation of printing suitability, difficulty in stabilizing silver paste, etc., and achieve good uniform dispersion stability, The effect of eliminating influence

Inactive Publication Date: 2013-04-24
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no polymer or polymer in the dispersion medium used, which will make the silver paste made difficult to stabilize for a long time, and its printability has not been evaluated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A transparent dielectric paste for making a front substrate of a plasma display. The front substrate of the plasma display needs to make a layer of visible light transparent glass layer with a thickness of 10-20 microns.

[0011] Grind the dielectric glass powder that meets the requirements to an average particle size of 3 microns and a maximum particle size of less than 10 microns.

[0012] The nitrocellulose with a mass percentage of 5% was dissolved in ethyl acetate or a mixed solvent of ethyl acetate, butyl carbitol, and dibutyl phthalate (mass ratio: 50:25:25). Add 2% organic silicon block copolymer hyperdispersant and 2% defoamer to prepare a uniform solution, which is the dispersion medium referred to in the present invention. The medium glass powder with a mass fraction of 75% is uniformly dispersed in the dispersion medium with a mass fraction of 25%, and is uniformly dispersed with a three-roll mill to prepare a medium slurry. The rheology of the slurry is a...

Embodiment 2

[0016] Making nano-silver conductive paste.

[0017] Inorganic powder is silver powder with a maximum particle size of less than 100 nanometers and an average particle size of 60 nanometers.

[0018] The nitrocellulose with a mass percentage of 5% was dissolved in ethyl acetate or a mixed solvent of ethyl acetate, butyl carbitol acetate, and dimethyl phthalate (mass ratio: 50:25:25). Add 6% of organic silicon block copolymer hyperdispersant and 2% of defoamer to prepare a uniform solution, which is the dispersion medium referred to in the present invention. Nano-silver powder with a mass fraction of 75% is uniformly dispersed in a dispersion medium with a mass fraction of 25%, and is uniformly dispersed with a three-roll mill to prepare a nano-silver conductive paste. The rheology of the slurry is a typical shear thinning body, and it has good screen printing suitability. Screen-print the slurry onto a single crystal silicon substrate with a gold-plated layer on the surface,...

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Abstract

The invention relates to a macromolecular solution dispersing medium with complete combustion and volatilization for dispensing organic powder. The dispersing medium has the composition characteristic that nitrocellulose or ethylcellulose is dissolved in single solvent or mixing solvent of ethyl acetate, terpilenol, butyl carbitol, butyl carbitol acetate and the like; auxiliaries of organic silicon block copolymer hyper-dispersant, defoamer and the like are added, and then a macromolecular solution is formed and used as the dispersing medium of the organic powder to prepare electronic slurry.The dispersing medium has the property characteristic that the electronic slurry has good uniform dispersing stability and rheology for easy forming, and the temperature can be reduced to 290 D during high-temperature sintering for manufacturing electronic components; after the temperature is held for 10 minutes in air, the dispersing medium can combust and volatize more than 99.99% of the original weight.

Description

technical field [0001] The invention relates to a completely combustible and volatile organic viscous polymer solution dispersion medium for dispersing inorganic powder. It is used to make paste-like electronic paste. During the process of making electronic components through high-temperature sintering, the electronic paste can be kept at a temperature as low as 290°C and kept in the air for 10 minutes. The organic polymer solution dispersion medium can burn and volatilize its original The quality score is above 99.99%. Eliminate the influence of residual carbon on the performance of electronic components after sintering of electronic paste. The invention belongs to the field of electronic materials for electronic components. Background technique [0002] In the production process of various electronic components, sensitive functional components (photosensitive, moisture sensitive, gas sensitive) and various photoelectric display devices, it is often necessary to make inor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/20C08L1/18C08L1/28C08J3/09
Inventor 罗世永许文才
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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