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Coil component

A technology of coil components and coils, applied in coil manufacturing, electrical components, transformer/inductor coils/windings/connections, etc., can solve the flexural deformation of the bottom plate, high core body brittleness, bending resistance, weak impact resistance, etc. problem, to achieve the effect of increasing the inductance value

Inactive Publication Date: 2009-12-30
SUMIDA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core body of the inductor is highly brittle, and has weak bending resistance and impact resistance. Therefore, when it is used in a power supply circuit of a portable device, etc., it may be easily damaged due to the flexural deformation of the bottom plate over time or the impact of falling. question

Method used

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Experimental program
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Effect test

preparation example Construction

[0088] In the production of the inductor 10 of the present embodiment, first, the anisotropic composite magnetic sheets 20a, 20b produced by any of the methods described above are prepared.

[0089] Next, the base film 17 ( Figure 2C ).

[0090] Composite magnetic material 32 ( Figure 3D ).

[0091] Another anisotropic composite magnetic sheet 20 (20a) is placed on the air-core coil 12, and they are hot-pressed to make them thermally melt into one body ( Figure 3E ).

[0092] External electrodes 16a, 16b are installed on the base film 17 exposing the anisotropic composite magnetic sheet 20a, and the outermost end 12a of the air-core coil 12 and the conductor 14 joined to the innermost end 12b of the air-core coil 12 are respectively connected to the outer electrodes 16a and 16b. The electrodes 16a, 16b are electrically connected, whereby the inductor 10 is prepared.

[0093] The anisotropic metal powder dispersed in the anisotropic composite magnetic sheet 20 is more p...

Embodiment

[0120] about Figure 1B A first embodiment showing a cross-sectional view, with Figure 4A A second embodiment showing a cross-sectional view, with Figure 4B A third embodiment showing a cross-sectional view, with Figure 4C A fourth embodiment showing cross-sectional views, with Figure 5C The inductor 10 in the seventh embodiment showing a sectional view, the inductance value [μH] and the DC superposition characteristic [A] were respectively simulated. As a comparative example, such as Figure 7 In the cross-sectional view shown in , the inductance value and DC superposition characteristics are similarly simulated for the inductor 11 in which isotropic metal powder is dispersed in the composite magnetic sheet 21 laminated on the upper and lower surfaces of the air-core coil 12 , and then both the core part 30 and the peripheral part 40 are filled with an isotropic composite magnetic material 35 .

[0121] For the anisotropic composite magnetic sheet 20 and the anisotro...

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Abstract

A coil component is provided, and the coil component for an inductor is deformable dependent on flex of a flexible printed board due to elapse of time when mounted thereon, and has high resistance against dropping impact and has an inductance value. The coil component includes an anisotropic compound magnetic sheet which is layered on at least any one or both of the upper surface and the lower surface of an air core coil formed spirally in a plane and which is composed of flat or needle-shaped soft magnetic metal powder, which has a major axis and a minor axis and is dispersed in a resin material, the major axis of which corresponds to an in-plane direction of the air core coil.

Description

technical field [0001] The present invention relates to coil components used in power supply circuits and the like of portable devices such as mobile phones. Background technique [0002] As shown in Japanese Patent Application Laid-Open No. 2005-268369, conventionally, multilayer inductors in which ferrite sintered bodies with built-in conductors are laminated are widely used as coil components of this type. The core body of the inductor is highly brittle, and has weak bending resistance and impact resistance. Therefore, when it is used in a power supply circuit of a portable device, etc., it may be easily damaged due to the flexural deformation of the bottom plate over time or the impact of falling. question. [0003] In order to solve the above problems, as shown in Japanese Patent Application Laid-Open No. 2006-303405 and corresponding US2006 / 0214759A1, it is proposed that a composite magnetic body (composite magnetic sheet) composed of magnetic powder and resin is lami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F41/04
CPCH01F17/04H01F2017/048H01F17/0006H01F2017/0066
Inventor 川原井贡
Owner SUMIDA CORP
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