KR20140059956A - Multi-layered common mode filter - Google Patents

Multi-layered common mode filter Download PDF

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Publication number
KR20140059956A
KR20140059956A KR1020120126448A KR20120126448A KR20140059956A KR 20140059956 A KR20140059956 A KR 20140059956A KR 1020120126448 A KR1020120126448 A KR 1020120126448A KR 20120126448 A KR20120126448 A KR 20120126448A KR 20140059956 A KR20140059956 A KR 20140059956A
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KR
South Korea
Prior art keywords
filter
layer
marking
magnetic layer
main body
Prior art date
Application number
KR1020120126448A
Other languages
Korean (ko)
Inventor
권재현
Original Assignee
삼성전기주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 삼성전기주식회사 filed Critical 삼성전기주식회사
Priority to KR1020120126448A priority Critical patent/KR20140059956A/en
Publication of KR20140059956A publication Critical patent/KR20140059956A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/346—Preventing or reducing leakage fields
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F2017/0093—Common mode choke coil

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

The present invention provides a laminated common mode filter which includes a first filter part including a plurality of first coil conductors and a plurality of first non-magnetic layers; a second filter part including a plurality of second coil conductors and a plurality of second non-magnetic layers; an intermediate layer formed between the first and second filter parts by laminating at least one magnetic layer; an upper cover magnetic layer formed on a top surface of the first filter part by laminating at least one magnetic layer; a main body including a lower cover magnetic layer formed on a bottom surface of the second filter part by laminating at least one magnetic layer and serving as a mounting surface; an upper direction denoting marking part formed on at least one portion in an outer surface except for the lower cover magnetic layer to confirm a mounting direction of the main body; and first and second electrodes formed on one side surface of the main body and electrically connected to extracting parts of the first and second filter parts.

Description

Multilayer Common Mode Filter {MULTI-LAYERED COMMON MODE FILTER}

The present invention relates to a laminated common mode filter.

In recent years, electronic devices such as mobile phones, home appliances, PCs, and PDAs have been gradually digitized and speeded up.

Such electronic devices are sensitive to external stimuli, and when a small abnormal voltage and high frequency noise from the outside are introduced into an internal circuit of an electronic device, a circuit is broken or a signal is distorted.

Such abnormal voltage and noise may be caused by lightning, electrostatic discharge charged to the human body, switching voltage generated in the circuit, power supply noise included in the power supply voltage, unnecessary electromagnetic signal or electric noise, A laminated common mode filter is used as a means for preventing noise from flowing into the circuit.

However, in the laminated common mode filter, the filter body is vertically symmetrical in appearance, so that the lower surface and the upper surface can not be easily distinguished from the naked eye.

Therefore, when using the laminated common mode filter, when the upper surface and the lower surface are mounted opposite to each other in the opposite direction, the direction of the magnetic field changes according to the direction of the coil and the magnetic flux is directed downward. The characteristic value is reduced.

Patent Document 1 discloses a body of a laminated common mode filter composed of first and second filter portions and an intermediate layer, but does not disclose means for confirming the mounting direction.

Korean Patent Laid-Open No. 10-2009-0118003

There is a need in the art for a new method that can easily distinguish the vertical direction in which the filter body is mounted when the laminated common mode filter is mounted on a substrate.

According to an aspect of the present invention, there is provided a resonator comprising: a first filter portion including a plurality of first coil conductors and a plurality of first nonmagnetic layers; a second filter portion including a plurality of second coil conductors and a plurality of second non- And an upper cover magnetic body layer formed on the upper surface of the first filter section and formed by laminating at least one magnetic body layer, wherein the upper cover magnetic body layer is formed by laminating at least one magnetic body layer formed between the first and second filter sections, And a lower cover magnetic material layer formed on the lower surface of the second filter part and serving as a mounting surface, wherein the lower cover magnetic material layer is formed by stacking at least one magnetic material layer; An upper display marking portion formed on at least one of the outer surfaces except for the lower cover magnetic layer for confirming the mounting direction of the main body; And first and second external electrodes formed on one side of the main body, the first and second external electrodes being electrically connected to the lead portions of the first and second filter portions; And a second harmonic generator.

In one embodiment of the present invention, the marking for upward marking may be formed on the uppermost surface of the upper cover magnetic layer.

In one embodiment of the present invention, the marking portion for upward display may include at least one of characters and graphics capable of indicating the mounting direction of the main body.

In one embodiment of the present invention, the marking for upward marking may be formed inside the upper cover magnetic layer so as to be exposed from the uppermost surface of the upper cover magnetic layer.

In one embodiment of the present invention, the marking portion for upward display may include an arrow-shaped graphic representing the mounting direction or upward direction of the main body on one side of the main body.

According to one embodiment of the present invention, in the laminated common mode filter, the mounting direction of the filter main body can be easily distinguished by forming the marking portion for indicating the upward direction on at least one of the outer surfaces except for the lower cover magnetic layer, It is possible to prevent the Z value and the scattering from being lowered.

1 is a perspective view showing a schematic structure of a laminated common mode filter according to an embodiment of the present invention.
2 is an exploded perspective view schematically showing a coupling structure of the remaining components except the external electrodes in the laminated common mode filter of FIG.
3 is a perspective view showing a schematic structure of a laminated common mode filter according to another embodiment of the present invention.
4 is a perspective view showing a schematic structure of a laminated common mode filter according to another embodiment of the present invention.
5 is a perspective view showing a schematic structure of a laminated common mode filter according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below.

Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.

In the drawings, the shapes and sizes of elements and the like can be exaggerated for clarity of description, and elements having the same functions as the elements within the same concept shown in the drawings of the embodiments will be described using the same reference numerals.

For convenience of explanation, the direction in which the upper cover magnetic layer is formed in the upper direction and the direction in which the lower cover magnetic layer is formed in the lower or mounting direction will be described together.

1 and 2, a laminated common mode filter 100 according to an embodiment of the present invention includes first and second filter portions, an intermediate layer 163, upper and lower cover magnetic material layers 161, 162, an upward marking portion 170, and first and second external electrodes 180.

In the present embodiment, the filter body 110 including the first and second filter portions, the intermediate layer 163, and the upper and lower cover magnetic substance layers 161 and 162 will be described together.

The first filter portion includes a plurality of coils (140, 150) and a plurality of first non-magnetic layer (112).

The coils 140 and 150 have coil conductors 141 and 143 and 151 and 153 formed by spirally winding on the nonmagnetic layer 112 and first and second nonmagnetic bodies 141 and 143 and 151 and 153 at the ends of the coil conductors 141, Hole electrodes 145 for electrically connecting the lead conductors 142, 144, 152 and 154 formed to be exposed to the outside of the layer 112 and the coil conductors 141, 143, 151, , 155).

At this time, the lead portions 142, 144, 152, and 154 may be connected to the first and second external electrodes 180 to form input / output terminals.

The intermediate layer 163 is disposed below the first filter portion, and may be formed by stacking at least one magnetic layer.

In the present embodiment, the intermediate layer 163 is formed by laminating two magnetic material layers, but the present invention is not limited to this, and the number of the magnetic material layers to be laminated can be appropriately changed if necessary.

The second filter unit is disposed below the intermediate layer 163 and includes a plurality of coils 120 and 130 and a plurality of second nonmagnetic layers 111.

The coils 120 and 130 are formed by winding coil conductors 121, 123, 131 and 133 spirally wound on the second nonmagnetic layer 111 and a nonmagnetic body 121, 123, 131 and 133 at the ends of the coil conductors 121, Hole electrodes 125, 122, 124, 132, 134 formed to be exposed to the outside of the layer 111 and electrically connected to the coil conductors 121, 123, 131, , 135).

At this time, the lead portions 142, 144, 152, and 154 may be connected to the first and second external electrodes 180 to form input / output terminals.

The upper cover magnetic body layer 161 is disposed on the upper portion of the first filter portion, and at least one magnetic body layer may be laminated.

In the present embodiment, the upper cover magnetic layer 161 is formed by laminating three magnetic layers, but the present invention is not limited to this, and the number of the magnetic layers to be laminated can be appropriately changed if necessary.

The lower cover magnetic layer 162 is disposed under the second filter portion, and at least one magnetic layer may be laminated. In the present embodiment, the lower cover magnetic layer 162 is formed by laminating three magnetic layers, but the present invention is not limited to this, and the number of the magnetic layers to be laminated can be appropriately changed if necessary.

The upper marking marking portion 170 may be formed to identify the mounting direction of the filter body 110 in at least one of the outer surfaces excluding the lower surface of the lower cover magnetic layer 162.

The upward marking portion 170 is formed on the uppermost surface of the upper cover magnetic layer 161 so that the marking portion 170 for upward marking is formed on the upper surface of the filter body 110 Can be easily identified.

Therefore, since the mounting direction of the filter main body 110 can be clearly identified and mounted through the upward marking marking portion 170, it is possible to prevent the phenomenon that the Z- And can improve disparity.

Referring to FIG. 3, the upward marking portion 170 'of the present embodiment is simply provided with a marking portion 170' for easily recognizing the upper surface of the filter body 110 In addition to being displayed in a graphic form such as a circle, a character such as T (Top) having the meaning of "upper" may be further included inside the circle.

Referring to FIG. 4, the upward marking portion 170 of the present embodiment is formed unexpectedly when formed on the top surface of the upper cover magnetic layer 161. FIG. 4 shows another embodiment of the present invention. It may be formed inside the upper cover magnetic layer 161 to prevent it.

At this time, it is preferable that the marking portion for upward marking 170 is formed by minimizing the marginal portion close to the uppermost surface of the upper cover magnetic layer 161 as much as possible so that it can be clearly distinguished from the top surface of the upper cover magnetic layer 161 .

5, the upward marking portion 171 of the present embodiment shows not only the uppermost surface of the upper cover magnetic layer 161 but also the lower surface of the lower cover magnetic layer < RTI ID = 0.0 > May be formed on one side of the filter main body 110 except for the lower surface of the filter body 162.

In the present embodiment, an upward direction marking portion 171 is formed on one side surface of the filter body 110. In this case, when the upper marking portion 171 formed on the side surface of the filter main body 110 is represented by a graphic form such as a circle or a rectangle, it is clearly distinguished from the upper direction of the filter main body 110 It is possible to form the upper display marking portion 171 at a position shifted upward from the center of the filter main body.

In addition, the upward marking portion 171 may include appropriate characters for identifying the upper portion as in the previous embodiment, or may be formed in the shape of an arrow or the like that can appropriately indicate the upward direction.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, and that various changes and modifications may be made therein without departing from the scope of the invention. It will be obvious to those of ordinary skill in the art.

100; A laminated common mode filter 110; The filter body
111; A second non-magnetic layer 112; The first non-
120, 130, 140, 150; coil
161; An upper cover magnetic layer 162; The lower cover magnetic layer
163; Intermediate layers 170, 170 ',171; The marking portion for upward direction display
180; The first and second outer electrodes

Claims (5)

A first filter portion including a plurality of first coil conductors and a plurality of first nonmagnetic layers,
A second filter portion including a plurality of second coil conductors and a plurality of second nonmagnetic layers,
An intermediate layer formed between the first and second filter portions and stacked with at least one magnetic material layer;
An upper cover magnetic body layer formed on the upper surface of the first filter portion, the upper cover magnetic body layer being formed by stacking at least one magnetic body layer;
A body formed on a lower surface of the second filter unit and serving as a mounting surface, the lower cover magnetic body layer being formed by stacking at least one magnetic body layer;
An upper display marking portion formed on at least one of the outer surfaces except for the lower cover magnetic layer for confirming the mounting direction of the main body; And
First and second external electrodes formed on one side surface of the main body and electrically connected to the lead portions of the first and second filter portions; / RTI >
The method according to claim 1,
And the marking portion for upward marking is formed on the uppermost surface of the upper cover magnetic layer.
3. The method of claim 2,
Wherein the marking unit for upward display includes at least one of characters and graphics capable of indicating the mounting direction of the main body.
The method according to claim 1,
Wherein the marking portion for upward marking is formed inside the upper cover magnetic layer so as to be projected from the uppermost surface of the upper cover magnetic layer.
The method according to claim 1,
Wherein the upward marking marking section includes an arrow-shaped figure that indicates the mounting direction or the upward direction of the main body on one side surface of the main body.
KR1020120126448A 2012-11-09 2012-11-09 Multi-layered common mode filter KR20140059956A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120126448A KR20140059956A (en) 2012-11-09 2012-11-09 Multi-layered common mode filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120126448A KR20140059956A (en) 2012-11-09 2012-11-09 Multi-layered common mode filter

Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10304622B2 (en) 2016-07-28 2019-05-28 Samsung Electro-Mechanics Co., Ltd. Electronic component

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10304622B2 (en) 2016-07-28 2019-05-28 Samsung Electro-Mechanics Co., Ltd. Electronic component

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