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Flexible winding and inductor integrated with capacitor characteristic and manufacturing method of flexible winding

A production method and technology of capacitance characteristics, applied in the direction of inductors with magnetic cores, inductors, transformers/inductor coils/windings/connections, etc., can solve problems such as adverse effects of EMI filtering performance, reduce volume and improve filtering efficiency effect

Inactive Publication Date: 2011-08-24
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if different voltages are applied to the innermost copper foil and the outermost copper foil, the existence of the insulating layer is equivalent to adding a parasitic capacitance, which will adversely affect the EMI filtering performance

Method used

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  • Flexible winding and inductor integrated with capacitor characteristic and manufacturing method of flexible winding
  • Flexible winding and inductor integrated with capacitor characteristic and manufacturing method of flexible winding
  • Flexible winding and inductor integrated with capacitor characteristic and manufacturing method of flexible winding

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Embodiment 1

[0035] image 3 A schematic structural diagram of a flexible winding integrated with capacitive properties provided for an embodiment of the present invention, as shown in image 3 As shown, the flexible winding includes: a dielectric film 1, a first metal layer 2 and a second metal layer 3 with instantaneous self-recovery properties. Wherein, the first metal layer 2 and the second metal layer 3 are arranged on both sides of the dielectric film 1 respectively. The structure of the two layers of metal with an insulating layer in between constitutes a thin film capacitor structure of the flexible winding, wherein the first The metal layer 2 and the second metal layer 3 serve as electrodes of the thin film capacitor structure respectively.

[0036] An embodiment of the present invention provides a flexible winding integrated with capacitive characteristics, the flexible winding includes a dielectric film and a first metal layer on both sides of the dielectric film and a second m...

Embodiment 2

[0063] Figure 17 It is a flowchart of a manufacturing method of a flexible winding provided by an embodiment of the present invention, and the flexible winding described here is the flexible winding provided in the above-mentioned embodiment. Such as Figure 17 As shown, the method includes:

[0064] Step 1701: setting a first metal layer on one side of the dielectric film, and vapor-depositing a second metal layer with instantaneous self-recovery properties on the other side of the dielectric film;

[0065] It should be noted that, if the first metal layer can be a copper layer and conductive copper paste is used, the copper layer on the surface of the dielectric film can specifically be: coating the non-metallized surface of the dielectric film by printing or the like In this way, the conductive copper paste is coated on the dielectric film; the conductive copper paste is cured by heating to form a copper layer. It can be seen that the use of conductive copper paste to m...

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Abstract

The embodiment of the invention provides a flexible winding and an inductor which are integrated with a capacitor characteristic, and a manufacturing method of the flexible winding. The flexible winding comprises a first metal layer, a medium thin film and a second metal layer having an instant self-restoring characteristic; the first metal layer and the second metal layer are arranged on both side surfaces of the medium thin film respectively so as to form a thin film capacitor structure of the flexible winding; and the first metal layer and the second metal layer are used as electrodes of the thin film capacitor structure respectively. The winding of the inductor is formed by coiling the flexible winding around a magnetic core. The manufacturing method of the flexible winding comprises the following steps of: installing the first metal layer on one side surface of the medium thin film, and evaporating the second metal layer having the instant self-restoring characteristic on the other side surface of the medium thin film; and pressing the structures together so as to obtain the flexible winding with the first metal layer, the medium thin film and the second metal layer.

Description

technical field [0001] Embodiments of the present invention relate to integrated filter technology, in particular to a flexible winding integrated with capacitive characteristics, an inductor and a manufacturing method thereof. Background technique [0002] In switching power supplies, in order to prevent electromagnetic interference (Electromagnetic Interference, referred to as: EMI) emission levels from exceeding relevant standards, EMI filters are usually used. Traditional EMI filters are usually composed of multiple discrete components. The discrete components include common mode inductors. , differential mode inductors, X capacitors and Y capacitors. Among them, the common mode inductor and the X capacitor are large in size. If two-stage or three-stage filtering is required, more components are required for the EMI filter, occupying 1 / 4 to 1 / 3 of the volume of the entire switching power supply. Such a switching power supply with an excessively large volume occupied by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F17/04H01F37/00H01F41/04H02M1/12
Inventor 徐焰韦敏刚
Owner HUAWEI TECH CO LTD
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