A kind of electrode slurry capping pretreatment liquid, preparation method and use method

A technology of electrode slurry and pretreatment liquid, which is applied in the direction of coating, etc., can solve the problems of chip exposure of components and internal holes of external electrodes, etc., and achieve the effects of reducing surface tension, increasing wettability, and avoiding hole defects

Active Publication Date: 2022-05-06
BEIJING YUANLIU HONGYUAN ELECTRONICS TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of exposed porcelain on the component chip and internal holes in the external electrode, the present invention provides an electrode slurry end-capping pretreatment solution, a preparation method and a use method

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  • A kind of electrode slurry capping pretreatment liquid, preparation method and use method
  • A kind of electrode slurry capping pretreatment liquid, preparation method and use method
  • A kind of electrode slurry capping pretreatment liquid, preparation method and use method

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preparation example Construction

[0051] Such as figure 1 As shown, the present invention provides a method for preparing an electrode slurry end-capping pretreatment solution. The pretreatment solution does not need to be prepared in advance, and can be prepared on site when used; it includes:

[0052] Step 1, mixing the organic solvent and the organic carrier to dissolve the organic carrier in advance to form an organic carrier solution;

[0053] Step 2. Add the dopamine and pH regulator pre-dispersed in ethanol to the organic carrier solution, adjust the pH value between 7 and 8, and stir evenly to prepare the electrode slurry end-capping pretreatment solution.

[0054] Such as figure 2 As shown, the present invention provides a method for using an electrode slurry end-capping pretreatment liquid. The pretreatment liquid is used in conjunction with the electrode slurry, before the electrode slurry is used, especially before the external electrode of the component is sealed; including :

[0055] Step 1. ...

Embodiment 1

[0061] The invention provides an electrode slurry end-capping pretreatment liquid, comprising:

[0062] 5.0wt.% of dopamine, 61.9wt.% of ethanol and terpineol mixed solution, 0.1% of lactic acid and lactate (pH regulator) and 33.0wt.% of ethyl cellulose;

[0063] The preparation method of the pretreatment liquid includes: first mixing the mixed solution of 51.9wt.% ethanol and terpineol in a ratio of 1:5 with 33.0wt.% ethyl cellulose, heating at a temperature of 75°C, and mechanically Stir and dissolve for 4h to pre-dissolve the resin; then add a mixture of 10wt.% ethanol, 5.0wt.% dopamine and 0.1% pH regulator lactic acid and lactate to the dissolved organic carrier solution (pH is controlled at 7 ~8), at a rotating speed of 1000rpm, mechanically stir for 1h to obtain a pretreatment solution with a homogeneously mixed viscosity within the range of 45.0Pa.s.

[0064] The method of using the pretreatment liquid includes: a component chip needs to be coated with electrode paste...

Embodiment 2

[0066] The invention provides an electrode slurry end-capping pretreatment liquid, comprising:

[0067] Dopamine 10.0wt.%, 70.0wt.% mixture of terpineol and butyl carbitol, ethanol 10.0wt.%, lactic acid and lactate (pH regulator) 1.0% and acrylic resin 9.0wt.%;

[0068] The preparation method of the pretreatment solution includes: first mixing the mixture of 70.0wt.% terpineol and butyl carbitol with 9.0wt.% acrylic resin, heating at 75°C, and mechanically stirring for 4 hours to make the resin Dissolve in advance; then add a certain amount of 10wt.% ethanol, 10.0wt.% dopamine and 1.0% pH adjuster lactic acid and lactate mixture to the dissolved organic carrier solution (pH is controlled at 7-8), 1000rpm Under the rotating speed of 1 hour, mechanically stir for 1 hour to obtain the pretreatment liquid with uniform viscosity in the range of 12.0Pa.s.

[0069] The method of using the pretreatment liquid includes: a component chip needs to be coated with electrode paste on both ...

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Abstract

The invention discloses an electrode slurry end-capping pretreatment liquid, a preparation method and a use method. The pretreatment liquid comprises: 5.0-10.0 wt.% of dopamine, 56.0-85.9 wt.% of an organic solvent, and 0.1-1.0% of a pH regulator and organic carrier 9.0~33.0wt.%. The method of use includes: pre-dipping or printing the electrode slurry end-capping pretreatment liquid on the position of the external electrode to be end-capped on the component; drying: for dip-coating or printing The components with the treatment liquid are dried to form a dopamine film layer. The present invention can form a layer of micronano-scale hydrophilic dopamine film on the surface of the component substrate, and then coat the electrode slurry on the surface, which will increase the adhesion between the electrode slurry and the substrate, and reduce the generation of exposed porcelain defects; At the same time, the hydrophilic dopamine film layer reduces the surface tension of the substrate, increases the wettability when the slurry contacts the substrate for the first time, and thus avoids the generation of hole defects inside the electrode layer.

Description

technical field [0001] The invention relates to the technical field of external electrodes of components, in particular to an electrode slurry end-capping pretreatment liquid, a preparation method and a use method. Background technique [0002] The external electrodes of most components (such as capacitors and resistors) generally need to be processed outside the chip, and the external electrodes are usually prepared by dipping or printing electrode paste on the chip. The quality of the external electrode directly affects the reliability of the product. Due to factors such as material characteristics, process conditions, and equipment level, the external electrode has various appearance defects, such as pinholes, sagging, exposed porcelain, and internal holes. etc., and products with these defects often cannot be reworked, and can only be disposed of as unqualified products; some unqualified products cannot be selected and eliminated by non-destructive inspection methods, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D101/28C09D179/02C09D133/04
CPCC09D101/28C09D101/284C09D179/02C09D133/04C08L2203/20C08L79/02C08L1/28C08L1/284
Inventor 段磊
Owner BEIJING YUANLIU HONGYUAN ELECTRONICS TECH
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