A kind of multilayer ceramic capacitor and its preparation method

A technology of multilayer ceramics and capacitors, which is applied in the manufacture of capacitors, laminated capacitors, capacitors, etc., can solve the problems of multilayer ceramic capacitors’ reliability deterioration, short-circuit failure rate increase, and deterioration, so as to prevent short-circuit failure rate from increasing and reliable Deterioration of performance, prevention of increase in short-circuit defect rate, and prevention of reliability deterioration

Active Publication Date: 2021-06-22
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moisture, dust particles, etc. attached to the thin dielectric film can easily lead to short-circuit failure or deterioration of reliability of the multilayer ceramic capacitor. In addition, the thin dielectric film has high static electricity, and the stacked dielectric film is easy to warp and fold during the lamination process. , resulting in an increase in the short-circuit defect rate of multilayer ceramic capacitors;
[0003] In addition, the solvent in the internal electrode paste will erode the dielectric film to a certain extent, and dissolve the resin in the dielectric film. When the dielectric film is thin, it will easily lead to the deterioration of the reliability of the multilayer ceramic capacitor and the increase of the short-circuit defect rate.

Method used

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  • A kind of multilayer ceramic capacitor and its preparation method
  • A kind of multilayer ceramic capacitor and its preparation method
  • A kind of multilayer ceramic capacitor and its preparation method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0040] An embodiment of the multilayer ceramic capacitor of the present invention, combined with figure 1 , the multilayer ceramic capacitor described in this embodiment is prepared by the following method:

[0041] Step 1: Mix ceramic powder, organic binder and organic solvent evenly to obtain a ceramic slurry, and then use the ceramic slurry as a raw material to prepare a dielectric film.

[0042] The ceramic powder, the organic binder and the organic solvent are uniformly mixed by a sand mill ball milling method, and the ball milling time can be 5h-10h.

[0043] The mass ratio of ceramic powder, organic binder and organic solvent is 10:3-5:6-9.

[0044] The main component of the ceramic powder is barium titanate; the organic binder is polyvinyl butyral; the organic solvent is a mixed solvent of toluene and ethanol with a mass ratio of 1-1.5:1.

[0045] Such as figure 2 As shown, the prepared ceramic slurry is cast on a PET carrier tape 21 as a carrier and dried to obtai...

Embodiment 2

[0071] An embodiment of the multilayer ceramic capacitor of the present invention, the multilayer ceramic capacitor described in this embodiment is prepared by the following method:

[0072] The difference from Example 1 is that the organic nano protective agent consists of 3-20wt% fluorine-containing acrylate, 79-96wt% diluent and 0.3-1.5wt% initiator. The diluent is one or more of ethyl acetate, isobutanol, propylene glycol methyl ether, n-butyl acetate, and methyl isobutyl ketone; the initiator is tertiary amine derivatives, benzoin and its derivatives, acetophenone One of derivatives and aromatic ketones;

[0073] The liquid organic nano protective agent is sprayed by high-pressure gas, sprayed on the surface of the dielectric film in the form of nanoscale gaseous spray, and then cured under ultraviolet light to form an organic nano protective layer attached to the surface of the dielectric film.

[0074] The application sets the experimental group 1-8 and the control gro...

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Abstract

The invention discloses a preparation method of a multilayer ceramic capacitor. In the multilayer ceramic capacitor prepared by the invention, the organic nano-protective liquid is sprayed on the ceramic film to form an organic nano-protective layer, and then the inner electrode is screen-printed on the coated organic nano-protective layer. In the multilayer ceramic capacitor prepared by the invention, the organic nano-protection layer can prevent the solvent in the internal electrode slurry from corroding the dielectric film, and prevent the short-circuit failure rate and reliability deterioration of the multilayer ceramic capacitor. Due to the low surface energy of the organic nano-protection layer, the dielectric film can be waterproof, solvent-proof and dust-proof, and prevent the increase of the short-circuit failure rate and the deterioration of the reliability of the multilayer ceramic capacitor. The organic nano protective layer can increase the smoothness of the surface of the dielectric film, reduce the coefficient of friction, play an antistatic role, and prevent the dielectric film from tilting and folding during the lamination process, thereby preventing the increase in the short-circuit failure rate of the multilayer ceramic capacitor.

Description

technical field [0001] The invention relates to the field of electronic components, in particular to a multilayer ceramic capacitor and a preparation method thereof. Background technique [0002] With the development of multilayer ceramic capacitors towards miniaturization and high capacitance, the thickness of the dielectric film continues to decrease, generally below 12 μm, and even below 1 μm. Moisture, dust particles, etc. attached to the thin dielectric film can easily lead to short-circuit failure or deterioration of reliability of the multilayer ceramic capacitor. In addition, the thin dielectric film has high static electricity, and the stacked dielectric film is easy to warp and fold during the lamination process. , resulting in an increase in the short-circuit defect rate of multilayer ceramic capacitors; [0003] In addition, the solvent in the internal electrode paste erodes the dielectric film to a certain extent and dissolves the resin in the dielectric film. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/12H01G4/30H01G13/00
CPCH01G4/12H01G4/30H01G13/00
Inventor 黄昌蓉满瑞奔佟有林安可荣陆亨
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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