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Miniature compression molding inductance element and manufacturing method thereof

A technology of an inductance element and a manufacturing method, which is applied in the field of miniature molded inductance elements and their manufacturing, can solve the problems of poor performance and inconvenience of automatic production of miniaturized inductance elements, and achieves the effects of flexible processing, high reliability and good consistency

Active Publication Date: 2015-05-13
东莞华络电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to propose a manufacturing method of a miniature molded inductance element to solve the technical problems of inconvenient automatic production of miniaturized inductance elements and poor performance in the prior art.

Method used

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  • Miniature compression molding inductance element and manufacturing method thereof
  • Miniature compression molding inductance element and manufacturing method thereof
  • Miniature compression molding inductance element and manufacturing method thereof

Examples

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Embodiment 1

[0032] The miniature molded inductance element of this embodiment is suitable for mobile phones, digital cameras, computers, televisions, hard disks, set-top boxes, game machines, etc., and includes a magnetic core, a built-in coil, a magnetic molded layer and terminal electrodes, and the surface of the built-in coil is provided with Self-adhesive layer that achieves an adhesive effect after application with heat or specific solvents.

[0033] The magnetic core and the magnetic molding layer adopt ferrite or metal soft magnetic material as molding powder. The terminal electrodes include pad-printed metallization layers, electroplated metallization layers or sputtered metallization layers.

[0034] The manufacturing method of the miniature molded inductance element, such as Figure 10 shown, including the following steps:

[0035] Prefabricated magnetic core and coil: The prefabricated magnetic core step adopts molding, extrusion or cutting molding methods, and ferrite or met...

Embodiment 2

[0042] A kind of manufacturing method of miniature molded inductance element, concrete description is as follows:

[0043] Firstly, a T-shaped magnetic core with a certain molding density is obtained by using a molding process, heated and pressurized and solidified. The T-shaped magnetic core is made of metal soft magnetic alloy, and FeSiCr powder is preferred. Such as figure 1 As shown, the prefabricated T-shaped magnetic core 10 includes a magnetic core body 101 and a core post 102 .

[0044] Made by winding machine and corresponding winding mold or other methods such as figure 2 As shown in the flat coil 20, the coil 20 includes two lead-out pins 201, and the lead-out pins 201 are drawn out after being twisted by 90° at the twisted part 202, so that the plane of the lead-out pins 201 is aligned with the electrode surface of the metallized electrode. Parallel leads. In this implementation, self-adhesive direct welding enameled wire is preferred, and the winding direction...

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Abstract

The invention discloses a miniature compression molding inductance element and a manufacturing method thereof. The manufacturing method of the miniature compression molding inductance element comprises the steps that a magnetic core and a coil are prefabricated; the prefabricated magnetic core and coil are combined into a combined body; powder and the combined body are compressed and molded to form a compression body, and a wire slot is formed in one side of the compression body; a metal electrode is formed on the wire slot; pin arrangement is carried out, in other words, the leading-out pin of the coil is arranged in the wire slot; an end electrode is formed, in other words, the leading-out pin of the coil and the metal electrode are welded together to form the end electrode of the miniature compression molding inductance element. By means of the manufacturing method of the miniature compression molding inductance element, the manufactured inductance element has the better consistency and is not likely to be damaged in the machining process, and the product reliability is higher. In addition, by means of the coil prefabrication technology, product machining is more flexible, the problem that a magnetic core is cracked in the prior art is avoided, and therefore the manufacturing method is more applicable to achieving volume production of thin and miniature power inductance elements.

Description

technical field [0001] The invention relates to the technical field of inductance elements, in particular to a micro molded inductance element and a manufacturing method thereof. Background technique [0002] With the development of mobile consumer electronics technology, power inductors are required to be miniaturized, thinned, high frequency, low DCR, high current, low EMI, high efficiency and low cost. The traditional process type power inductors include air-gap assembled inductors and coated power inductors. With the increase in labor costs in recent years, it is increasingly unable to meet the development requirements of mobile consumer electronics such as smartphones and tablet computers. [0003] Although the saturation current of the air-gapped assembled inductor products can be achieved at a relatively high level, as the frequency of use of devices becomes higher and higher, the EMI problem of the products is also highlighted, and due to the low degree of automation...

Claims

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Application Information

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IPC IPC(8): H01F41/00H01F17/04H01F27/29H01F41/04H01F41/02
Inventor 蒋中立夏胜程
Owner 东莞华络电子有限公司
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