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Electronic part, layered ceramic capacitor, and manufacturing method thereof

A technology of ceramic capacitors and electronic components, which is applied in the direction of laminated capacitors, capacitors, fixed capacitors, etc., can solve the problem of reduced electrostatic capacity, and achieve the effect of preventing electrode discontinuity and suppressing the reduction of electrostatic capacity

Inactive Publication Date: 2007-07-04
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in either case, there will be a problem that the electrostatic capacity will decrease.

Method used

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  • Electronic part, layered ceramic capacitor, and manufacturing method thereof
  • Electronic part, layered ceramic capacitor, and manufacturing method thereof
  • Electronic part, layered ceramic capacitor, and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0143] Preparation of each paste

[0144] First, the BaTiO 3 Powder (BT-02 / Sakai Chemical Industry Co., Ltd.) and MgCO 3 , MnCO 3 , (Ba 0.6 Ca 0.4 ) SiO 3 And selected from rare earths (Gd 2 o 3 , Tb 4 o 7 、Dy 2 o 3 、Ho 2 o 3 、Er 2 o 3 、Tm 2 o 3 , Yb 2 o 3 、Lu 2 o 3 , Y 2 o 3 ) powder was wet-mixed by ball milling for 16 hours, and then dried to make a dielectric material. The average particle diameter of these raw material powders is 0.1-1 μm. (Ba 0.6 Ca 0.4 ) SiO 3 is the BaCO 3 , CaCO 3 and SiO 2It was wet-mixed by ball milling for 16 hours, dried and sintered in air at 1150° C., and then wet pulverized by ball milling for 100 hours.

[0145] In order to form the obtained dielectric material into a paste, the organic vehicle was added to the dielectric material and mixed by a ball mill to obtain a paste for dielectric green sheets. The organic vehicle is polyvinyl butyral as a binder: 6 parts by mass, bis(2-ethylhexyl) phthalate (DOP) as a pla...

Embodiment 2

[0196] The dielectric green sheet paste prepared in Example 1 was coated on a PET film (carrier sheet) using a wire bar coater, and then dried to obtain a green sheet 10a. The same procedure as in Example 1 was carried out. In this method, a pre-sintered internal electrode thin film 12a is formed on the green sheet 10a to prepare a laminate as shown in FIG. 8 . Next, the PET film was peeled off from the laminate to prepare a pre-sintered sample composed of the green sheet 10a and the internal electrode film 12a, and the pre-sintered sample was debindered and sintered in the same manner as in Example 1. and annealing to prepare a sintered surface observation sample composed of the dielectric layer 10 and the internal electrode layer 12 .

[0197]Next, the obtained sample for surface observation was observed by SEM from a direction perpendicular to the surface on which the internal electrode layer 12 was formed, and the internal electrode layer after sintering was observed and e...

Embodiment 3

[0201] In the formation of the internal electrode film 12a before firing, Yb 2 o 3 Instead of BaTiO used as a dielectric target 3 , except that, a sample was obtained in the same manner as in Example 1. The characteristics evaluation of the electrical characteristics (capacitance C, dielectric loss tan δ) was performed for each sample. The results are shown in Table 2. Electrical characteristics (capacitance C, dielectric loss tan δ) were performed in the same manner as in Example 1.

[0202]

sample

serial number

Internal electrode film 12a before sintering

Capacitance

[µF]

tanδ

Evaluation

thickness

[μm]

Nickel content ratio

[wt%]

Yb 2 o 3 contains

Proportion [wt%]

6

comparative example

0.4

100

0.0

0.83

0.01

×

7

Example

0.4

99.30

0.70

0.97

0.02

○

8

...

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Abstract

The invention provides an electronic part, layered ceramic capacitor, and manufacturing method thereof. There is provided a method for manufacturing an electronic part having an internal electrode layer (12) and a dielectric layer (10). The method for manufacturing the electronic part includes: a step for forming an internal electrode thin film (12a) to be baked and containing a conductor component and a dielectric component; a step for superimposing a green sheet (10a) to become the dielectric layer (10) after baking and the internal electrode thin film (12a); and a step for baking the layered body of the green sheet (10a) and the internal electrode thin film (12a). There are provided an electronic part such as a layered ceramic capacitor and a manufacturing method thereof capable of suppressing the particle growth of the conductor particles in the baking stage, effectively preventing formation of spherical shape of the internal electrode layer and electrode cut off, and effectively suppressing lowering of the electrostatic capacity even when each thickness of the internal electrode layer is made thin.

Description

technical field [0001] The present invention relates to an electronic component, a multilayer ceramic capacitor and a preparation method thereof, and particularly relates to an electronic component and a multilayer ceramic capacitor suitable for thinning and miniaturization. Background technique [0002] As an example of an electronic part, a laminated ceramic capacitor is composed of an element body of a laminated structure in which a dielectric layer and an internal electrode layer alternate with each other and a pair of external terminal electrodes formed at both ends of the element body. It is configured in multiple layers. [0003] This multilayer ceramic capacitor can be produced as follows: First, the dielectric layer before firing and the internal electrode layer before firing are alternately laminated in a desired number of sheets to manufacture the element body before firing, then, it is fired, and then after firing A pair of external terminal electrodes are forme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/12H01G4/008H01G4/30
CPCH01G4/1209H01G4/0085H01G4/1227H01G4/30H01G4/12
Inventor 铃木和孝佐藤茂树
Owner TDK CORPARATION
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