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Synthetic multi-layer ceramic electronic component and mfg. method thereof

A technology of electronic components and multilayer ceramics, which is applied in the direction of printed circuit manufacturing, printed circuit parts, fixed capacitor parts, etc., can solve the problems of increasing the dielectric loss of the substrate material and not being easy to lose the dielectric loss, etc.

Inactive Publication Date: 2005-08-17
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sintering auxiliary materials such as glass often increase the dielectric loss of the substrate material
For this reason, it is not easy to obtain a substrate material that can be fired at a low temperature less than or equal to 1000°C and has low dielectric loss.

Method used

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  • Synthetic multi-layer ceramic electronic component and mfg. method thereof
  • Synthetic multi-layer ceramic electronic component and mfg. method thereof
  • Synthetic multi-layer ceramic electronic component and mfg. method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0087] (1) Preparation of high dielectric constant materials

[0088] Preparation of Ceramic Components

[0089] As raw material, BaCO 3 , TiO, Nd 2 o 3 、Sm 2 o 3 with Pr 2 o 3 After weighing and mixing thoroughly, BaO 2 TiO 2 with ReO 3 / 2 (Rare earth oxide) composition such as the mixture listed in Table 1. The mixture was calcined at 1150°C for 1 hour, and the obtained calcined mixture was pulverized to form the ceramic components S1-S10 listed in Table 1.

[0090] Table 1

ceramics

Numbering

Main component (mole %)

BaO

TiO 2

ReO 3 / 2

S1

13

58

Nd: 10, Sm: 19

S2

25

55

Nd: 20

S3

5

75

Nd: 20

S4

2

65

Nd: 33

S5

10

50

Nd: 40

S6

18

62

Nd: 20

S7

8

65

Nd: 27

S8

8

52.5

Nd: 39.5

...

example 2

[0111] In Example 2, the steps of Example 1 were averaged except that the low dielectric constant material was prepared as follows.

[0112] Preparation of low dielectric constant materials

[0113] As raw material powder, weigh Mg(OH) 2 with Al 2 o 3 powder to obtain the stoichiometric composition MgAl 2 o 4 , wet mixed for 16 hours. After the obtained mixture was dried, it was calcined at 1350° C. for 2 hours to be pulverized. In the obtained mixture, the pulverized component as ceramic powder is weighed to a ratio of 20 to 80% by weight, and the second glass component having the composition in Table 8 and used as a sintering auxiliary material and an appropriate amount of adhesive are mixed with the pulverized component to obtain Low dielectric constant material composition. The composition was then granulated with an appropriate amount of adhesive, and the obtained granules were press-molded with a pressure of 200 MPa to obtain a disk-shaped green body with a diamet...

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Abstract

A composite multilayer ceramic electronic part includes a high dielectric-constant layer and at least one low dielectric-constant layer laminated with each other, the high dielectric-constant layer including a high dielectric-constant material and has a relative dielectric constant epsir of about 20 or more, and the low dielectric-constant layer including a low dielectric-constant material and has a relative dielectric constant epsir of about 10 or less. The high dielectric-constant material mainly comprises a BaO-TiO2-ReO3 / 2 dielectric and a first glass composition, the BaO-TiO2-ReO3 / 2 dielectric being represented by xBaO-yTiO2-zReO3 / 2, where x, y and z are % by mole and satisfy the following conditions: 8<=x<=18; 52.5<=y<=65; 20<=z<=40; and x+y+z=100; and Re is a rare earth element, and the low dielectric-constant material comprises a composite of a ceramic and a second glass composition. The composite multilayer ceramic electronic part is resistant to delamination or deformation at the interface between the different types of materials, can be fired at low temperatures and is suitable for the high-frequency applications.

Description

technical field [0001] The present invention relates to composite multilayer ceramic electronic components suitable for use in multilayer circuit boards, including for example microwave resonators, filters or multilayer capacitors, and methods for their manufacture. More particularly, the present invention relates to a composite multilayer ceramic electronic component which laminates a high dielectric constant layer comprising a high dielectric constant material and a low dielectric constant layer comprising a low dielectric constant material. Background technique [0002] In recent years, electronic equipment has become smaller, lighter, and thinner, and there has been a demand for ultra-miniaturization of electronic components used in such electronic equipment. However, conventional electronic components such as resonators are designed and constructed independently, and the ultra-miniaturization of these devices alone is not enough to make electronic equipment ultra-miniat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B18/00C03C14/00C04B35/468C04B35/50H01G4/12H01L23/498H05K1/03H05K1/16
CPCH01L2924/09701C04B2237/68H01G4/1227C04B35/468C04B35/50C04B2237/562C04B2237/704H01L2924/19105H05K1/0306C04B2237/343H01L2224/48091H01L23/49894B32B18/00C04B2237/346H05K3/4688H05K2201/09672H01L2924/3025C03C14/004H05K1/162H01L2924/00014H01L2924/00B32B2307/204B32B2457/00
Inventor 杉本安隆近川修森直哉
Owner MURATA MFG CO LTD