Laminated coil device and manufacturing method therefor

A technology of stacking coils and manufacturing methods, applied in coil manufacturing, transformer/inductor components, inductor/transformer/magnet manufacturing, etc., can solve the problem of high equipment cost, increased stray capacitance, increased dielectric constant, etc. problems, to achieve the effects of high reliability of structural defects, suppression of stray capacitance, and good high-frequency characteristics

Active Publication Date: 2015-06-24
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, in this patent document 2, firing is carried out in a non-oxidizing atmosphere of vacuum, oxygen-free or low oxygen partial pressure, so it is difficult to control the firing atmosphere. In addition, the cost of equipment is also high, resulting in operating costs. heightened concerns
[0018] That is, in Patent Document 2, when the firing treatment is performed in the air atmosphere, the surface of the particles is oxidized to form an oxide layer, so there is a concern that the apparent relative permittivity increases.
And, as a result, there is a possibility that the stray capacitance of the electronic component increases, resulting in a decrease in high-frequency characteristics.
[0019] Therefore, in Patent Document 2, as described above, firing must be performed in a non-oxidizing atmosphere, and it is difficult to control the firing atmosphere, which may lead to increased costs.

Method used

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  • Laminated coil device and manufacturing method therefor
  • Laminated coil device and manufacturing method therefor
  • Laminated coil device and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] Magnetic material samples A to G in which the first glass component was contained in the metallic magnetic material were prepared, and various characteristics of these magnetic material samples A to G were evaluated.

[0133] [Magnetic Paste Production]

[0134] Fe—Si—Cr-based magnetic alloy powder containing Fe: 92.0 wt %, Si: 3.5 wt %, and Cr: 4.5 wt % with an average particle diameter of 6 μm was prepared as a metallic magnetic material.

[0135] In addition, SiO-containing glass was prepared as the first glass component 2 : 79wt%, B 2 o 3 : 19wt%, K 2 O: 2% by weight of glass powder having an average particle diameter of 1 μm and a softening point of 760° C.

[0136] Next, it weighed so that the compounding ratio of this magnetic alloy powder and glass powder may become Table 1, and mixed it, and obtained the magnetic material raw material.

[0137] Then, 26 parts by weight of terpineol dihydroacetate as an organic solvent, 3 parts by weight of ethyl cellulose ...

Embodiment 2

[0157] Various non-magnetic samples a to g in which the second glass component was contained in the ceramic material were prepared, and various properties of the non-magnetic samples a to g were evaluated.

[0158] [Production of non-magnetic paste]

[0159] As a ceramic material, Al with an average particle size of 1 μm was prepared 2 o 3 Made of ceramic powder.

[0160] In addition, as the second glass component, SiO containing 2 : 79wt%, B 2 o 3 : 19wt%, K 2 O: 2% by weight of glass powder having an average particle diameter of 1 μm and a softening point of 760° C.

[0161] Next, it weighed and mixed so that the compounding ratio of this ceramic powder and glass powder may become Table 2, and obtained the nonmagnetic material raw material.

[0162] Then, 26 parts by weight of terpineol dihydroacetate as an organic solvent, 3 parts by weight of ethyl cellulose resin as a binder resin, and 1 part by weight of a plasticizer were added to 100 parts by weight of the nonma...

Embodiment 3

[0176] Among the magnetic pastes prepared in Example 1, magnetic pastes from C to E with low water absorption and relative permittivity εr and good initial magnetic permeability μi were used, which were the same as those prepared in Example 2. Various laminated coil parts were produced by combining non-magnetic pastes, and the characteristics were evaluated.

[0177] [Manufacturing of laminated coil parts]

[0178] According to the method and order described in the [specific embodiment], a laminated molded body was produced (refer to Figure 3 ~ Figure 8 ).

[0179] That is, first, screen printing, coating and drying of the magnetic paste on the PET film were repeated to produce a first magnetic layer having a predetermined thickness.

[0180] Next, a non-magnetic paste was screen-printed and applied to a predetermined area on the surface of the first magnetic layer, and dried to form a hollow rectangular first non-magnetic layer having a predetermined width. Next, the magn...

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Abstract

A laminated coil device includes a magnetic part (5) that includes a metallic magnetic material and a first glass component, and a non-magnetic part (6) that includes a ceramic material and a second glass component, and a coil conductor (1) is formed such that at least a main surface of the coil pattern contacts the non-magnetic part (6). The magnetic part (5) is formed such that the volume content of the first glass component in the total of the metallic magnetic material and the first glass component is 46 to 60 volume%. The non-magnetic part (6) is formed such that the volume content of the second glass component in the total of the ceramic material and the second glass component is 69 to 79 volume%. As a result, it is possible to achieve a highly reliable laminated coil device and manufacturing method therefor which can provide good high-frequency characteristics and good magnetic characteristics without impairing insulation, and can reduce the occurrence of structural defects such as cracks or peeling.

Description

technical field [0001] The present invention relates to a laminated coil component and a manufacturing method thereof. More specifically, the present invention relates to a laminated coil component using a metallic magnetic material for a magnetic body portion and a manufacturing method thereof. Background technique [0002] Conventionally, as electronic components used in choke coils used at high frequencies, power supply circuits through which large currents flow, and power inductors for DC / DC converter circuits, magnetic composites are known. A laminated coil component with a built-in coil conductor in the component body (component body). [0003] In such a laminated coil component, if the apparent relative permittivity increases between the coil conductors and between the coil conductors and the external electrodes to increase the stray capacitance, the resonance frequency shifts to the low frequency side, resulting in high Concerns about degradation of frequency charac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F17/00H01F41/04
CPCH01F17/0013H01F27/292H01F41/043H01F17/04H01F41/046H01F41/04H01F1/01H01F1/032H01F27/2804H01F2027/2809
Inventor 前田英一
Owner MURATA MFG CO LTD
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