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Producing method of dielectric powder, composite electronic part and producing method thereof

A technology of composite electronic components and manufacturing methods, which is applied in transformer/inductor parts, inductance/transformer/magnet manufacturing, electrical components, etc., and can solve the problems of poor sinterability, reliability deterioration, and difficulty in thinning the dielectric layer, etc. problems, achieve high reliability and improve sinterability

Inactive Publication Date: 2007-05-02
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the dielectric powder agglomerated by intermediate sintering remains on the surface of the sheet during flaking, resulting in deterioration of sinterability, which has the disadvantage of deteriorating reliability as a result.
Therefore, the problem of difficulty in further thinning the dielectric layer remains.

Method used

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  • Producing method of dielectric powder, composite electronic part and producing method thereof
  • Producing method of dielectric powder, composite electronic part and producing method thereof
  • Producing method of dielectric powder, composite electronic part and producing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136] In this example, a dielectric powder and a dielectric green sheet were produced, and the obtained dielectric powder and dielectric green sheet were respectively evaluated.

[0137] First, prepare TiO as the main component raw material constituting the dielectric powder 2 , CuO, NiO, and MnCO as a secondary component raw material 3 , each raw material is wet-mixed to obtain a mixed powder. Wet mixing was carried out by adding pure water to the prepared main component raw materials and auxiliary component raw materials, putting them in a medium made of an oxidation pick and mixing them by ball milling for 16 hours.

[0138] The addition amount of each main component raw material is, TiO 2 : 92mol%, CuO: 3mol%, NiO: 5mol%, MnCO as a subcomponent raw material 3 It is 1% by weight for the main component raw material. In addition, in this example, as TiO 2 raw material, using SiO 2 The content by weight ratio is 20ppm of raw materials.

[0139] Then, the mixed powder o...

Embodiment 2

[0155] In Example 2, using the dielectric green sheet produced in Example 1, a multilayer filter having the configuration shown in FIGS. 1 to 3 was produced by the following method.

[0156] That is, first, a predetermined electrode pattern was printed on the dielectric green sheet produced in Example 1 using a paste for internal electrodes containing silver as a main component, thereby producing a dielectric green sheet with an electrode pattern. In this example, the internal electrode patterns were the patterns shown in FIG. 3, and a plurality of dielectric green sheets having electrode patterns were produced.

[0157] Next, a magnetic body green sheet is produced.

[0158] First prepare NiO, CuO, ZnO, and Fe as raw materials for magnetic material powder 2 o 3 , mixing these raw materials, followed by sintering and pulverization to prepare magnetic material powder. In addition, the compounding quantity of each raw material is NiO: 25 mol%, CuO: 11 mol%, ZnO: 15 mol%, and ...

reference example 1

[0176] Except when making dielectric powder, as the main component raw material TiO 2 The raw material is TiO 2 Raw materials, using SiO-containing 2 219ppm TiO by weight ratio 2 Except that, a dielectric powder was produced in the same manner as in Example 1, and then a dielectric green sheet was produced in the same manner as in Example 1. Then, a multilayer filter was produced by the same method as in Example 2 using the obtained dielectric green sheet, and evaluation was performed in the same manner as in Example 2. In Table 1, the results of IR (insulation resistance) and average lifetime are shown. Also, in Reference Example 1, the thickness of the dielectric layer 32 was 15 μm.

[0177] middle sintered

with or without

jet crushed

with or without

TiO 2 raw material

SiO 2 content

[ppm]

IR

[Ω]

average life expectancy

[h]

Example 2

have

have

20

9.8×10 8 ...

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Abstract

A method of production of dielectric powder containing as main ingredients Ti, Cu, and Ni, comprising a step of mixing an oxide of Ti and / or a compound forming an oxide of Ti by firing, an oxide of Cu and / or a compound forming an oxide of Cu by firing, and an oxide of Ni and / or a compound forming an oxide of Ni by firing to obtain a mixed powder, a step of calcining the mixed powder to obtain a calcined powder, a step of dry crushing the calcined powder to obtain dry crushed powder, and a step of wet crushing the dry crushed powder.

Description

technical field [0001] The present invention relates to a method for producing a dielectric powder which is a dielectric layer material constituting various electronic components, a method for producing a composite electronic component using the dielectric powder, and a composite electronic component obtained by the production method. Background technique [0002] As electronic devices incorporating electronic components are required to be smaller and lighter, the demand for smaller multilayer electronic components is rapidly increasing. Therefore, in order to solve the high-frequency noise of the circuit board, a multilayer filter is adopted. This multilayer filter is one of the composite electronic components that integrate coils and capacitors in order to arrange a plurality of such electronic components on the circuit board. kind. [0003] Since such a multilayer filter is an electronic component having both a coil part and a capacitor part, it is necessary to simultane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F1/00C22C1/04H01G4/40H01F27/00H03H7/075
CPCH01F41/046C04B2235/5445C04B35/6261C04B2235/3281H01G4/30H01F1/344C04B2235/3284H03H7/06C01P2006/40H01G4/1218C04B35/265C01P2004/51C04B35/46C01P2004/61C04B2235/5481H03H2001/0085C04B2235/6025H01G4/40C04B2235/3279H01F27/40C04B2235/3262H01F2017/002C01P2004/62C01G53/006H01B3/00
Inventor 远藤真视桃井博铃木孝志佐藤高弘
Owner TDK CORPARATION
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