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A preparation method of a multilayer ceramic capacitor

A technology of multilayer ceramics and capacitors, applied in the direction of multilayer capacitors, capacitors, fixed capacitors, etc., can solve the problems of deterioration of consistency, easy adhesion of ceramic bodies, incomplete glue removal, etc., to achieve good consistency and prevent excessive volatilization. , good density and good dielectric properties

Active Publication Date: 2019-01-25
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for preparing a multilayer ceramic capacitor, so as to solve the deterioration of the consistency of the current multilayer ceramic capacitor during the sintering process, the incomplete debinding, and the The ceramic body is easy to stick to each other

Method used

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  • A preparation method of a multilayer ceramic capacitor
  • A preparation method of a multilayer ceramic capacitor
  • A preparation method of a multilayer ceramic capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0067] figure 1 It is a flow chart of the preparation method of the sintered block of the present invention, as an embodiment of the preparation method of the sintered block of the present invention, the preparation method of the sintered block described in this embodiment comprises the following steps:

[0068] (1) The ceramic powder mixed with the sintering aid, the binder and the organic solvent are uniformly mixed to obtain a ceramic slurry, and then the ceramic film is prepared by using the ceramic slurry as a raw material.

[0069] In this embodiment, the operation of uniformly mixing the ceramic powder doped with sintering aid, the binder and the organic solvent is as follows: the ceramic powder doped with the sintering aid, the binder and the organic solvent are uniformly mixed by ball milling , The ball milling time is 10~16h.

[0070] The mass ratio of the ceramic powder doped with the sintering aid, the binder and the organic solvent in the ceramic slurry is 10:3-5...

Embodiment 2

[0092] The preparation method of the sintered block described in this embodiment is basically the same as that of Example 1, the difference is that:

[0093] (3) Laminate the ceramic film with the copper layer obtained in step (2) and the ceramic film obtained in step (1) to obtain the first substrate, and coat the copper paste on the surface of both sides of the first substrate perpendicular to the stacking direction and drying to form a copper layer, and then pressing and cutting the first substrate with the copper layer on the surface to obtain a green compact.

[0094] The first substrate is obtained by stacking at least one ceramic film with a copper layer obtained in step (2) and at least one ceramic film obtained in step (1). The laminated first substrate has at least one copper layer inside, and the laminated first substrate has no copper layer on the two side surfaces perpendicular to the stacking direction. Coating copper paste on both sides of the first substrate p...

Embodiment 3

[0098] Figure 8 It is a flow chart of the preparation method of the multilayer ceramic capacitor of the present invention, as an embodiment of the preparation method of the multilayer ceramic capacitor of the present invention, the preparation method of the multilayer ceramic capacitor of the present embodiment includes the following step:

[0099] Step 1. Mix ceramic powder doped with sintering aid, binder and organic solvent uniformly to obtain a ceramic slurry, and then use the ceramic slurry as a raw material to prepare a ceramic film.

[0100] The ceramic membrane prepared in step 1 in this example is the same as the ceramic membrane in step (1) in example 1.

[0101] In this embodiment, the operation of uniformly mixing the ceramic powder doped with sintering aid, the binder and the organic solvent is as follows: the ceramic powder doped with the sintering aid, the binder and the organic solvent are uniformly mixed by ball milling , The ball milling time is 10~16h.

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Abstract

The invention discloses a preparation method of a multilayer ceramic capacitor. In the preparation process of the multilayer ceramic capacitor, the sintered block and the laminated body are mixed andsintered, after the sintering auxiliary agent in the sintered block volatilizes, a local atmosphere with high volatilization concentration is formed around the laminated body, the excessive volatilization of the sintering auxiliary agent in the laminated body is effectively prevented, and the sintered ceramic body is uniform, compact and consistent. The surface of the sintered block adopted by theinvention is attached with copper particles, so that adhesion between the sintered ceramic body and the sintered block can be avoided. The ceramic body prepared by the invention is uniform and compact, has good consistency, does not adhere to the sintered block, and is easy to screen with the sintered block.

Description

technical field [0001] The invention relates to the technical field of electronic components, in particular to a preparation method of a multilayer ceramic capacitor. Background technique [0002] In the preparation process of multilayer ceramic capacitors with copper inner electrodes, low-temperature sintered ceramic materials are required to be co-fired with copper inner electrodes. Sintering is dense at temperatures below the melting point of copper. Since the sintering aids tend to volatilize easily during high-temperature sintering, it is easy to deteriorate the consistency of the ceramic chips loaded on the same setter. Specifically, when ceramic chips loaded on the same setter are sintered at high temperature, ceramic chips with a higher loading density can hinder the volatilization due to the higher concentration of sintering aids in the volatile atmosphere, so more sintering aids remain. The formation of a liquid phase in the ceramic chip promotes the densificatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/30H01G4/12
CPCH01G4/1236H01G4/30
Inventor 陆亨冯小玲卓金丽邱小灵安可荣
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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