JP2007134594A - Common mode choke coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a common mode choke coil with both of common mode noise suppressing function and AC coupling function and mountable by utilizing a land provided in a high-speed digital differential line of an existing substrate. <P>SOLUTION: A coil unit 2 is formed of first and second coil conductors 21, 22 of lateral winding structure and a magnetic body 23; and a first capacitor unit 3 is formed of a first capacitor conductor 31, a second capacitor conductor 32, and a dielectric body 33. Further, a second capacitor unit 4 is formed of a first capacitor conductor 41, second capacitor conductor 42, and a dielectric body 43. In this case, the common mode choke coil 1 is structured so that the coil unit 2 is interposed between the first capacitor unit 3 and the second capacitor unit 4. Preferably, the second capacitor conductors 32, 42 of the first and second capacitor units 3, 4 are constituted so as to be hidden by the first capacitor conductors 31, 41 with respect to the coil unit 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a common mode choke coil for removing common mode noise on a high-speed differential transmission line.

Conventionally, as this type of common mode choke coil, for example, there is a technique disclosed in Patent Document 1.
The common mode choke coil has a configuration in which a plurality of spiral conductors are stacked via a plurality of insulating layers, and the stacked body is sandwiched between a pair of magnetic substrates. Thereby, a primary coil and a secondary coil are formed by a plurality of spiral conductors, and common mode noise that has entered the primary and secondary coils is reflected and attenuated by the impedance of these coils.

JP 2005-85997 A

However, the conventional techniques described above have the following problems.
In general, in a high-speed digital differential line such as S-ATA (Serial AT Attachment) or PCI-express, it is essential to mount an AC coupling capacitor in order to cut a DC electric component. However, many of the existing substrates equipped with such a line do not have a line configuration based on the premise of removing common mode noise or the like. For this reason, when the conventional common mode choke coil as described above must be mounted on such a line on an existing substrate, a land for the common mode choke coil is provided in addition to the land for the AC coupling capacitor. It must be further created on the track, and much labor and time are required for the mounting work.

  The present invention has been made to solve the above-described problems, and has a common mode noise removal function and an AC coupling function, and uses a land provided on a high-speed digital differential line on an existing substrate. An object is to provide a mountable common mode choke coil.

In order to solve the above-mentioned problems, the invention of claim 1 is directed to a coil portion formed by coating a first coil conductor and a second coil conductor with a magnetic material, and a first capacitor conductor and a second capacitor conductor facing each other. A common mode choke coil comprising first and second capacitor portions formed by coating with a dielectric, respectively, wherein the first capacitor portion is connected in series to the first coil conductor of the coil portion, and The second capacitor unit is connected in series to the second coil conductor of the coil unit.
With this configuration, one terminal of the first capacitor unit and one terminal of the first coil conductor of the coil unit are respectively connected to a pair of lands on one line of the high-speed differential transmission path, and the second capacitor One terminal of the second portion and one terminal of the second coil conductor of the coil portion can be connected to a pair of lands on the other line of the high-speed differential transmission path, respectively. Then, the common mode noise that has entered the high-speed differential transmission path is reflected and attenuated by the coil portion having a structure in which the first coil conductor and the second coil conductor are covered with a magnetic material. In addition, the electrical DC component on the one or the other line is cut by the AC coupling function of the first or second capacitor portion having a structure in which the first capacitor conductor and the second capacitor conductor are covered with a dielectric. The

The invention of claim 2 is the common mode choke coil according to claim 1, wherein the coil portion is laminated on the first capacitor portion, the second capacitor portion is laminated on the coil portion, and the coil portion is It is configured to be interposed between the first and second capacitor portions.
With such a configuration, unnecessary stray capacitance generated between the first capacitor unit and the second capacitor unit or between each capacitor unit and the coil unit is reduced.

According to a third aspect of the present invention, in the common mode choke coil according to the second aspect, the first and second coils are arranged so that the magnetic poles of the first and second coil conductors do not face the first and second capacitor portions. The conductor has a horizontal winding structure.
With this configuration, the magnetic fields of the first and second coil conductors are looped from one magnetic pole to the other magnetic pole without being blocked by the first and second capacitor portions.

According to a fourth aspect of the present invention, in the common mode choke coil according to the second or third aspect, the first capacitor conductor is a plurality of conductor plates that are stacked at equal intervals and connected at the same edge. And the second capacitor conductor is composed of a plurality of conductor plates each of which is alternately arranged and extended with a plurality of conductor plates of the first capacitor conductor and exposed from the dielectric, and the first capacitor portion includes a coil portion. A first capacitor conductor connected to one end of the first coil conductor, and a second capacitor conductor in which each conductor plate is hidden below each conductor plate of the first capacitor conductor with respect to the coil portion. The second capacitor portion includes a first capacitor conductor connected to one end of the second coil conductor of the coil portion, and a second capacitor plate hidden on the upper side of each conductor plate of the first capacitor conductor with respect to the coil portion. Consisting of capacitor conductor It was formed.
With this configuration, the second capacitor conductor of the first capacitor portion is hidden under the respective conductor plates of the first capacitor conductor with respect to the coil portion, and the second capacitor conductor of the second capacitor portion is hidden with respect to the coil portion. Since it is hidden above each conductor plate of the first capacitor conductor, unnecessary stray capacitance is generated between the second capacitor conductor of the first capacitor section and the first capacitor conductor of the second capacitor section, or in the second capacitor section. This also does not occur between the second capacitor conductor and the first capacitor conductor of the first capacitor section, and as a result, the suppression of electrostatic coupling can be further enhanced.

  As described above in detail, according to the common mode choke coil of the present invention, the common mode noise elimination function that attenuates the common mode noise that has entered the high-speed differential transmission path and the AC coupling function that cuts the electrical DC component. Can be mounted using a land provided on a high-speed differential line on an existing substrate, and an AC coupling capacitor like the above-described conventional common mode choke coil. There is no need to create a land for the common mode choke coil on the line in addition to the land for use, and as a result, there is an excellent effect that the labor of the mounting work can be saved and the time can be shortened.

  In particular, according to the invention of claim 2, the coil portion is interposed between the first and second capacitor portions, and between the first capacitor portion and the second capacitor portion, or between each capacitor portion and the coil portion. Since unnecessary stray capacitance generated between the lines is reduced, electrostatic coupling between the lines is suppressed, and fluctuations in impedance between the lines are reduced. As a result, there is an effect that it is possible to transmit a high-quality signal with almost no distortion of the signal waveform by transmitting on the line without reflection of the high-frequency component of the signal to be transmitted.

  According to a third aspect of the present invention, the first and second coil conductors of the coil portion are horizontally wound so that the magnetic field is not hindered by the first and second capacitor portions and from one magnetic pole to the other. Since the loop to the magnetic pole is made, the effect of suppressing the common mode noise can be further enhanced.

  Furthermore, according to the invention of claim 4, unnecessary stray capacitance is generated between the second capacitor conductor of the first capacitor and the coil part 2, or between the second capacitor conductor of the second capacitor part and the coil part 2. Since the structure does not occur in the middle, the suppression of electrostatic coupling between lines can be further increased, and higher-quality signal transmission is possible.

  The best mode of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view of a common mode choke coil according to an embodiment of the present invention, FIG. 2 is a perspective view showing the inside of the common mode choke coil shown in FIG. 1, and FIG. FIG. 3 is an equivalent circuit diagram of a common mode choke coil.

  As shown in FIG. 1, the common mode choke coil 1 of this embodiment has a structure in which a coil portion 2 is laminated on a first capacitor portion 3 and a second capacitor portion 4 is laminated on the coil portion 2. Is made. That is, the common mode choke coil 1 is a chip body in which the coil portion 2 is interposed between the first and second capacitor portions 3 and 4, and four external electrodes 5-1 to 5-4 are provided outside thereof. Have.

  The coil part 2 is a coil part for removing common mode noise. As shown in FIG. 2, the coil part 2 covers the first coil conductor 21, the second coil conductor 22, and the first and second coil conductors 21 and 22. The magnetic body 23 is formed. In FIG. 2, in order to easily distinguish the first coil conductor 21 and the second coil conductor 22, the line indicating the second coil conductor 22 is expressed thicker than the line indicating the first coil conductor 21. However, the actual wire diameters of the first coil conductor 21 and the second coil conductor 22 are the same.

The first coil conductor 21 is a spiral conductor in which the outer end 21a is exposed on the side surface (right side in FIG. 2) of the magnetic body 23, and the second coil conductor 22 also has the outer end 22a connected to the magnetic body. This is a spiral conductor exposed on the side surface of 23 (the right side surface in FIG. 2).
FIG. 4 is a perspective view showing the first coil conductor 21 and the second coil conductor 22 separately.
As shown in FIG. 4, the first coil conductor 21 (second coil conductor 22) has a horizontal winding structure in which the magnetic poles 21A and 21B (22A and 22B) are horizontally oriented. 21 enters the gap between the second coil conductors 22, and the entire first and second coil conductors 21 and 22 form a double winding state. That is, as shown in FIG. 2, the magnetic poles 21A, 21B and 22A, 22B (the right and left magnetic poles in FIG. 2) of the first and second coil conductors 21 and 22 are the first and second capacitor portions 3, 4 respectively. The winding direction of the first and second coil conductors 21 and 22 is set to the lateral direction so as not to face the side.

  The first capacitor unit 3 is a part for cutting a DC component on the line, and includes a first capacitor conductor 31 and a second capacitor conductor 32 which are incorporated so as to face each other, and the first and second capacitor conductors. It is comprised with the dielectric 33 which coat | covered 31 and 32. FIG.

FIG. 5 is a perspective view showing the first capacitor conductor 31 and the second capacitor conductor 32 separately.
As shown in FIG. 5, the first capacitor conductor 31 is formed by laminating three identical conductor plates 31a to 31c at equal intervals, and the same edge portion of the three conductor plates 31a to 31c is a vertical conductor plate. Connected at 31d.
On the other hand, the second capacitor conductor 32 is formed by laminating three identical conductor plates 32 a to 32 c at equal intervals, and the three conductor plates 32 a to 32 c are disposed between the conductor plates 31 a to 31 c of the first capacitor conductor 31. Formed. Specifically, each conductor plate 32c (32b, 32a) of the second capacitor conductor 32 is below the conductor plate 31c (31b, 31a) of the first capacitor conductor 31 with respect to the coil portion 2 (see FIG. 2). The conductor plates 32a to 32c are alternately arranged with the conductor plates 31a to 31c so as to be positioned at the positions.
Then, as shown in FIG. 2, the conductor plate 31 c of the first capacitor conductor 31 is connected to one end portion 21 b of the first coil conductor 21, and the extended end portions of the conductor plates 32 a to 32 c of the second capacitor conductor 32. 32 a ′ to 32 c ′ are exposed on the side surface of the dielectric 33.
That is, as shown in FIG. 3, the first capacitor unit 3 was connected in series with the first coil conductor 21 of the coil unit 2.

The first capacitor conductor 31 and the second capacitor conductor 32 are devised to suppress the generation of unnecessary stray capacitance.
FIG. 6 is a plan view showing a main part of the first capacitor unit 3.
As shown in FIG. 6, the width w1 of each conductor plate 31c (31b, 31a) of the first capacitor conductor 31 is set wider than the width w2 of each conductor plate 32c (32b, 32a) of the second capacitor conductor 32. Each conductive plate 32c (32b, 32a) was concealed below each conductive plate 31c (31b, 31a), and only the extended end portion 32c ′ (32b ′, 32a ′) was exposed.

  The second capacitor unit 4 shown in FIG. 2 is also a part for cutting the DC component on the line, and the first capacitor conductor 41 and the second capacitor conductor 42 incorporated so as to face each other, And a dielectric 43 covering the second capacitor conductors 41, 42.

As shown in FIG. 5, the first capacitor conductor 41 is also formed by connecting the same edge portions of three conductor plates 41a to 41c laminated at equal intervals by a vertical conductor plate 41d, and the second capacitor The conductor 42 is also formed by arranging three conductor plates 42 a to 42 c laminated at equal intervals between the conductor plates 41 a to 41 c of the first capacitor conductor 41. Specifically, the conductor plates 42a (42b, 42c) of the second capacitor conductor 42 are positioned above the conductor plates 41a (41b, 41c) of the first capacitor conductor 41 with respect to the coil portion 2. The conductor plates 42a to 42c are arranged alternately with the conductor plates 41a to 41c.
Then, as shown in FIG. 2, the conductor plate 41 a of the first capacitor conductor 41 is connected to one end 22 b of the second coil conductor 22, and the extended ends of the conductor plates 42 a to 42 c of the second capacitor conductor 42. 42 a ′ to 42 c ′ are exposed on the side surface of the dielectric 43.
That is, as shown in FIG. 3, the second capacitor unit 4 was connected in series with the second coil conductor 22 of the coil unit 2.

The first capacitor conductor 41 and the second capacitor conductor 42 are also devised to suppress the generation of unnecessary stray capacitance.
FIG. 7 is a plan view showing a main part of the second capacitor unit 4.
As shown in FIG. 7, the width w1 of each conductor plate 41c (41b, 41a) of the first capacitor conductor 41 is set wider than the width w2 of each conductor plate 42c (42b, 42a) of the second capacitor conductor 42. Each of the conductor plates 42c (42b, 42a) was hidden on the upper side of each of the conductor plates 41c (41b, 41a), and only the extended end portions 42c ′ (42b ′, 42a ′) were exposed.

In FIG. 2, the external electrode 5-1 is attached so as to be connected to the outer end 21 a of the first coil conductor 21, and the external electrode 5-2 is connected to the conductor plates 32 a ′ to 32 c ′ of the second capacitor conductor 32. Installed to connect.
The external electrode 5-3 is attached so as to be connected to the outer end 22a of the second coil conductor 22, and the external electrode 5-4 is connected to the conductor plates 42a 'to 42c' of the second capacitor conductor 42. It is attached as follows.

Next, a method for manufacturing the common mode choke coil 1 will be described.
8 is a perspective view showing the layer structure of the first capacitor unit 3, FIG. 9 is a perspective view showing the layer structure of the coil unit 2, and FIG. 10 is the layer structure of the second capacitor unit 4. FIG. 11 is a perspective view showing an integration process of the coil part 2 and the first and second capacitor parts 3 and 4.
First, in order to form the first capacitor portion 3, as shown in FIG. 8, the conductor plates 32a, 31a, 32b, 31b, 32c, 31c are made to be dielectric sheets while the dielectric sheets 33a to 33f are sequentially laminated. Pattern printing is performed on the surfaces 33a to 33f. At this time, through holes 31d1 to 31d4 having the same length as the edges of the conductor plates 31a to 31c are formed in the dielectric sheets 33c to 33f. Finally, a dielectric sheet 33g having a through hole 33g ′ for connection to the one end portion 21b of the first coil conductor 21 is laminated on the top.
In this manner, as shown in FIG. 11, the first capacitor conductor 31 composed of the conductor plates 31a to 31c and the conductor plate 31d and the second capacitor conductor 32 composed of the conductor plates 32a to 32c are provided before firing. The first capacitor unit 3 is formed.

Next, the coil part 2 is formed. Specifically, as shown in FIG. 9, the outer end 21a and the plurality of partial conductors 21 'of the first coil conductor 21 are pattern-printed on the lowermost magnetic sheet 23a, and the second coil conductor 22 A plurality of partial conductors 22 'are alternately printed between the plurality of partial conductors 21'. Then, a plurality of magnetic sheets 23b having a plurality of through holes 21h and a plurality of through holes 22h are laminated on the magnetic sheet 23a. Thereafter, the outer end portion 22a of the second coil conductor 22 and the plurality of partial conductors 22 'are pattern-printed on the magnetic sheet 23c, and the plurality of partial conductors 21' of the first coil conductor 21 are printed on the plurality of partial conductors 22. The pattern is printed alternately between the ′. Then, after laminating the magnetic sheet 23 on the magnetic sheet 23b, the magnetic sheet 23d is laminated on the top. At this time, the magnetic sheet 23a is provided with a through hole 23a ′ for communicating with the through hole 33g ′ of the dielectric sheet 33g of the first capacitor unit 3 to form one end portion 21b of the first coil conductor 21. A through hole 23d is formed in the magnetic sheet 23d to form one end 22b of the second coil conductor 22 in communication with the through hole 43a 'of the dielectric sheet 43a of the second capacitor unit 4. ′ Is drilled. As a result, the end portions of the partial conductor 21 'on the magnetic sheet 23a and the partial conductor 21' on the magnetic sheet 23c are connected through the through hole 21h to form the first coil conductor 21. Further, the end portions of the partial conductor 22 'on the magnetic sheet 23a and the partial conductor 22' on the magnetic sheet 23c are connected to each other through the through hole 22h to form the second coil conductor 22.
Thus, as shown in FIG. 11, the coil part 2 before baking which has the 1st coil conductor 21 and the 2nd coil conductor 22 is formed.

  Further, the second capacitor portion 4 is formed. That is, as shown in FIG. 10, the conductor sheets 41a, 42a, 41b, 42b, 41c, and 42c are pattern printed on the surfaces of the dielectric sheets 43a to 43f while sequentially laminating the dielectric sheets 43a to 43f. At this time, through holes 41d1 to 41d4 having the same length as the edges of the conductor plates 41a to 41c are formed in the dielectric sheets 43b to 43e, and one end of the second coil conductor 22 is formed in the dielectric sheet 43a. A through hole 43a 'for connection with the portion 22b is drilled. Finally, the dielectric sheet 43g is laminated on the top. In this way, as shown in FIG. 11, the first capacitor conductor 41 composed of the conductor plates 41a to 41c and the conductor plate 41d and the second capacitor conductor 42 composed of the conductor plates 42a to 42c have the pre-fired condition. A second capacitor portion 4 is formed.

  Finally, the first capacitor part 3, the coil part 2, and the second capacitor part 4 before firing are stacked in order from the bottom to be integrated, and then fired to produce the coil part 2 and the first and second parts. A chip body composed of the capacitor portions 3 and 4 is obtained. Then, by forming the external electrodes 5-1 to 5-4 on the chip body, the common mode choke coil 1 shown in FIGS. 1 and 2 is manufactured.

Next, the operation and effect of the common mode choke coil of this embodiment will be described.
12 is a perspective view showing a substrate on which a differential transmission line is mounted, FIG. 13 is a perspective view showing a state in which the common mode choke coil 1 is mounted on a land of the differential transmission path, and FIG. It is a perspective view which shows the state which mounted the common mode choke coil 1 in each differential transmission path.
A substrate 100 shown in FIG. 12 is a substrate on which high-speed digital differential lines 110 and 120 such as S-ATA and PCI-express are mounted, and includes an IC 130 such as a chip controller and a connector 131. In the high-speed digital differential lines 110 and 120, the high-speed digital differential line 110 is a signal output transmission line, and includes a signal D + line 111 and a signal D- line 112. The high-speed digital differential line 120 is a transmission line for signal input, and is composed of lines 121 and 122.
In such a high-speed digital differential line 110 (120), lands 111a, 111b, 112a, and 112b (121a, 121b, 122a, and 122b) for mounting the AC coupling capacitor 200 indicated by a broken line are normally provided for each line. 111, 112 (121, 122).

  The common mode choke coil 1 according to this embodiment has lands 111a, 111b, 112a, 112b (121a, 121b, 122a, 122b) provided on the high-speed digital differential line 110 (120) of such an existing substrate 100. Can be implemented using. Specifically, as shown in FIG. 13, the external electrodes 5-1 and 5-2 are soldered onto the lands 111a and 111b of the line 111, and the external electrodes 5-3 and 5-4 are connected to the lands of the line 112. Solder onto 112a, 112b. Thereby, the first coil conductor 21 and the first capacitor unit 3 of the coil unit 2 shown in FIG. 3 are connected in series to the line 111, and the second coil conductor 22 and the second capacitor unit 4 are connected to the line 112. Connected in series.

Therefore, the high-frequency signal D + on the line 111 passes through the first coil conductor 21 and the first capacitor unit 3, and the high-frequency signal D− on the line 112 passes through the second coil conductor 22 and the second capacitor unit 4. Pass through.
At this time, as described above, since the coil unit 2 is interposed between the first and second capacitor units 3 and 4, unnecessary stray capacitance is generated between the first and second capacitor units 3 and 4. It hardly occurs between each capacitor part 3 (4) and the coil part 2. Further, as shown in FIG. 6 (FIG. 7), the second capacitor conductor 32 (42) is set so as to be hidden inside the first capacitor conductor 31 (41) with respect to the coil part 2, The generation of stray capacitance is more strictly suppressed. For this reason, electrostatic coupling between the lines 111 and 112 hardly occurs, and high-quality signals D + and D− with no distortion of the signal waveform are transmitted.

  When common mode noise enters the lines 111 and 112, these noises are reflected and attenuated by the coil portion 2 in which the first and second coil conductors 21 and 22 are covered with the magnetic body 23. Moreover, as shown in FIG. 4, the first and second coil conductors 21 and 22 of the coil unit 2 have a horizontal winding structure, so that the magnetic field from the coil unit 2 is applied to the first and second capacitor units 3 and 3. Loop from one pole to the other without being obstructed by 4. As a result, common mode noise can be removed more reliably.

  As shown in FIG. 14, by mounting the common mode choke coil 1 on both of the high-speed digital differential lines 110 and 120, both input and output signals can be transmitted with high quality, and common mode noise and The direct current component can be removed efficiently.

In addition, this invention is not limited to the said Example, A various deformation | transformation and change are possible within the range of the summary of invention.
For example, in the above embodiment, the common mode choke coil in which the first coil conductor 21 and the second coil conductor 22 of the coil unit 2 are horizontally wound has been described. However, the common mode choke in which these coil conductors are vertically wound is described. The coil is not intended to be excluded from the scope of the present invention.
Moreover, in the said Example, the 1st and 2nd capacitor conductors 31 and 32 (41, 42) of the 1st and 2nd capacitor | condenser part 3 (4) are made into several conductor board 31a-31c (41a-41c) and a conductor. The common mode choke coil constituted by the combination of the plates 32a to 32c (42a to 42c) has been described, but the first capacitor conductor 31 (41) composed of one conductor plate and the second capacitor composed of one conductor plate. The common mode choke coil that forms the first capacitor part 3 (second capacitor part 4) with the conductor 32 (42) is not intended to be excluded from the scope of the present invention.

1 is a perspective view of a common mode choke coil according to an embodiment of the present invention. It is a perspective view which permeate | transmits and shows the inside of the common mode choke coil shown in FIG. It is an equivalent circuit diagram of a common mode choke coil. It is a perspective view which isolate | separates and shows a 1st coil conductor and a 2nd coil conductor. It is a perspective view which isolate | separates and shows a 1st capacitor conductor and a 2nd capacitor conductor. It is a top view which shows the principal part of a 1st capacitor | condenser part. It is a top view which shows the principal part of a 2nd capacitor | condenser part. It is a perspective view which shows the layer structure of a 1st capacitor | condenser part. It is a perspective view which shows the layer structure of a coil part. It is a perspective view which shows the layer structure of a 2nd capacitor | condenser part. It is a perspective view which shows the integration process of a coil part and the 1st and 2nd capacitor | condenser part. It is a perspective view which shows the board | substrate carrying a differential transmission line. It is a perspective view which shows the state which mounted the common mode choke coil in the land of the differential transmission path. It is a perspective view which shows the state which mounted the common mode choke coil in each differential transmission path.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Common mode choke coil, 2 ... Coil part, 3 ... 1st capacitor | condenser part, 4 ... 2nd capacitor | condenser part, 5-1-5-4 ... External electrode, 21 ... 1st coil conductor, 21a, 22a ... Outer end portion, 21b, 22b ... one end portion, 22 ... second coil conductor, 23 ... magnetic body, 31, 41 ... first capacitor conductor, 31a-31c, 31d, 32a-32c, 41a-41c, 41d, 42a ˜42c... Conductor plate, 32, 42... Second capacitor conductor, 32a 'to 32c', 42a 'to 42c' ... extended end portion, 33, 43 ... dielectric.

Claims (4)

A coil portion formed by coating the first coil conductor and the second coil conductor with a magnetic material, and first and second electrodes formed by coating the first capacitor conductor and the second capacitor conductor facing each other with a dielectric material, respectively. A common mode choke coil comprising a capacitor portion of
The first capacitor unit is connected in series to the first coil conductor of the coil unit, and the second capacitor unit is connected in series to the second coil conductor of the coil unit.
A common mode choke coil. The common mode choke coil according to claim 1,
The coil section is stacked on the first capacitor section, the second capacitor section is stacked on the coil section, and the coil section is interposed between the first and second capacitor sections. The
A common mode choke coil. The common mode choke coil according to claim 2,
The first and second coil conductors have a lateral winding structure so that the magnetic poles of the first and second coil conductors do not face the first and second capacitor portions.
A common mode choke coil. In the common mode choke coil according to claim 2 or 3,
The first capacitor conductor is composed of a plurality of conductor plates laminated at equal intervals and connected at the same edge,
The second capacitor conductor is composed of a plurality of conductor plates each of which is alternately arranged and extended with a plurality of conductor plates of the first capacitor conductor and exposed from a dielectric.
The first capacitor section includes the first capacitor conductor connected to one end of the first coil conductor of the coil section, and each conductor plate of the first capacitor conductor with respect to the coil section. The second capacitor conductor hidden underneath,
The second capacitor portion includes the first capacitor conductor connected to one end of the second coil conductor of the coil portion, and each conductor plate of the first capacitor conductor with respect to the coil portion. The second capacitor conductor hidden on the upper side of
A common mode choke coil.

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