JP2000101213A - Printed circuit board and producing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printed circuit board and a producing method therefor, with which magnetic components can be easily produced and the characteristics of magnetic components can be changed, concerning the printed circuit board to mount magnetic parts such as a coil or a transformer. SOLUTION: Concerning the printed circuit board constituted by mounting magnetic components on the main body of a board, a magnetic component 13 is provided with plural conductor parts 15 for winding wires formed at intervals on the main body of the board, pat parts 17 for winding wire formed on both the sides of respective conductor parts 15 for winding wires on the main body of board, core members 19 arranged while covering the plural conductor parts 15 for winding the wire, and wire wound conductors 21 arranged over the core members 19 so as to mutually connect the pat parts 19 for winding wires formed on the various wire wound conductor parts 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board, and more particularly to a printed circuit board on which magnetic components such as a coil and a transformer are mounted.

[0002]

2. Description of the Related Art Conventionally, in various electric circuits, magnetic components such as coils and transformers are mounted on a printed circuit board to form circuits. FIG. 18 shows a method of manufacturing a magnetic component mounted on such a printed circuit board.
First, the core member 1 and the bobbin 2 are selected in consideration of the application, mounting space, the number of circuits, and the like, and the magnetic component 3 is designed.

Next, as shown in FIG. 1A, the end of the winding 5 is entangled with the pin member 4 of the bobbin 2 determined at the time of design.
Because of the polarity, the winding 5 is wound around the bobbin 2 while paying attention to the direction. Then, after winding the winding 5 around the bobbin 2 a specified number of times, the end of the winding 5 is entangled with the pin member 6 determined at the time of design.

When a plurality of circuits are required, a plurality of circuits are formed by repeating the above-described steps while insulating each circuit with a Mylar tape or the like. In this way, after the winding of the winding 5 around the bobbin 2 is completed,
As shown in (b), the core member 1 is mounted on the bobbin 2, and thereafter, as shown in (c), the core member 1 is fixed by the insulating tape 7 or the adhesive 8.

Next, in order to eliminate wobble between the winding 5 and the core member 1, a process such as impregnation with a resin is performed.
Is completed. Then, the magnetic component 3 completed in this way is mounted on a printed circuit board in a production line.

[0006]

However, in such a conventional magnetic component, the winding 5 is wound around the bobbin 2,
After the core member 1 is mounted and fixed on the bobbin 2 to manufacture the magnetic component 3, the magnetic component 3 is mounted on a printed circuit board in a production line. There was a problem of becoming.

Further, after the magnetic component 3 is manufactured, it is impossible to adjust the inductance or the number of turns, and there is a problem that the characteristics of the magnetic component 3 cannot be changed. An object of the present invention is to solve such a conventional problem and to provide a printed circuit board capable of easily manufacturing a magnetic component and changing characteristics of the magnetic component, and a method of manufacturing the same. .

[0008]

According to a first aspect of the present invention, there is provided a printed circuit board having a magnetic body mounted on a main body of the printed circuit board, wherein the plurality of windings are formed at intervals on the main body. Conductor portion, a winding pad portion formed on both sides of each winding conductor portion of the substrate body,
A core member arranged to cover the plurality of winding conductor portions, and a winding conductor arranged to straddle the core member and interconnecting the winding pad portions formed on different winding conductor portions. It is characterized by comprising.

According to a second aspect of the present invention, in the printed circuit board according to the first aspect, the winding conductor is connected to the winding pad portion by bonding. According to a third aspect of the present invention, in the printed circuit board according to the first or second aspect, an input pad portion and an output pad portion are formed on the substrate body, and the input pad portion and the output pad portion are formed. And a connecting conductor connected to the winding pad.

According to a fourth aspect of the present invention, there is provided the printed circuit board according to any one of the first to third aspects, wherein the winding conductor and the core member are sealed in the substrate body. And According to a fifth aspect of the present invention, in the printed circuit board according to any one of the first to fourth aspects, the winding conductor has a ribbon shape.

According to a sixth aspect of the present invention, in the printed circuit board according to any one of the first to fifth aspects, the conductor for winding is formed in an inner layer of the substrate body. I do. A printed circuit board according to a seventh aspect is the printed circuit board according to any one of the first to sixth aspects, wherein the core member is fixed to the substrate body by the winding conductor.

The method of manufacturing a printed circuit board according to claim 8, wherein the winding conductors are formed at intervals on the substrate body, and the winding pad portions are formed on both sides of each of the winding conductors. Arranging a core member over the plurality of winding conductors, bonding the winding conductor across the core member, and connecting the winding pad portions formed on the different winding conductors by the winding conductor to each other; And a step of connecting to

(Function) In the printed circuit board according to the first aspect, a plurality of winding conductors are formed at intervals on the board body.
A core member is arranged so as to cover the winding conductor. Then, when the winding conductor is disposed across the core member and the pad portions for winding formed on different winding conductor portions are connected to each other, the winding conductor portion and the winding conductor are connected to form a unit turn of the winding. Is done.

In the printed circuit board according to the second aspect, the winding conductor is connected to the winding pad portion by bonding.
In the printed circuit board according to the third aspect, the input pad section and the output pad section formed on the board main body are connected to the winding pad section by connection conductors, and the magnetic components are connected to the board circuit.

[0015] In the printed circuit board according to the fourth aspect, the winding conductor and the core member are sealed in the substrate body to improve insulation.
The stability of the core member is achieved. In the printed circuit board according to the fifth aspect, the winding conductor is formed in a ribbon shape, and particularly in a transformer, the facing area between the windings is increased, so that the coupling between the primary side and the secondary side is maintained, and the leakage inductance and the inductance are reduced. Surge components are suppressed.

In the printed circuit board according to the sixth aspect, the conductor for winding is formed in an inner layer of the substrate body and shielded. In the printed board according to the seventh aspect, the core member is fixed to the board body by the winding conductor. In the method of manufacturing a printed circuit board according to the eighth aspect, first, the winding conductors are formed at intervals on the substrate body, and the winding pad portions are formed on both sides of each winding conductor.

Next, a core member is arranged so as to cover the plurality of winding conductor portions, and in this state, the winding conductor is bonded across the core member, and the winding conductor formed on the different winding conductor portions by the winding conductors. The pads are connected to each other.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment (corresponding to claims 1 to 4) of a printed circuit board according to the present invention. In these figures, reference numeral 11 denotes
2 shows a substrate body.

A magnetic component 13 composed of a coil is mounted on the substrate body 11. The magnetic component 13 has a plurality of winding conductors 15 formed at intervals on the substrate body 11. Each winding conductor 15 has a long shape and is arranged in parallel. Conductor 15 for each winding
On one side and the other side, a winding pad portion 17 is arranged and connected to the winding conductor portion 15.

As shown in FIG. 2, the winding conductor 15 is
The winding pad portion 17 is formed on the surface layer 11 a of the substrate body 11, and is formed on the surface of the substrate body 11. Reference numeral 18 denotes a resist layer. The core member 19 is arranged so as to cover the plurality of winding conductors 15. The core member 19 has a rectangular shape and is made of, for example, ferrite.

A winding conductor 21 is arranged to straddle the core member 19. In this embodiment, the winding conductor 21 has a linear shape and is made of gold, aluminum, or the like. The winding conductor 21 connects the winding pad portions 17 formed on the adjacent winding conductor portions 15 to each other.

That is, in this embodiment, in FIG. 1, the winding pad portions 17 arranged on one side of the respective winding conductor portions 15 are provided with reference numerals a, b, c, d and e in order from the left side of the drawing. Are attached to the winding pad portions 17 arranged on the other side of the respective winding conductor portions 15 in order from the left side of the figure, a ′, b ′, c ′,.
When the signs d 'and e' are given, a'-b, b'-c, c'-
d and d'-e are connected by the winding conductor 21, respectively.

The connection of the winding conductor 21 is performed by wire bonding. An input pad 23 and an output pad 25 are formed outside the winding pad 17 of the substrate body 11. The input pad portion 23 and the output pad portion 25 have a long shape, and are formed parallel to a line connecting the winding pad portions 17.

The input pad portion 23 is connected to the winding pad portion 17 by a connection conductor 27. The output pad portion 25 is connected to the winding pad portion 17 by a connection conductor 29. This connection conductor 27, 2
Connection 9 is performed by wire bonding.

Further, in this embodiment, the winding conductor 21
The core member 19 is sealed to the substrate main body 11 by, for example, an insulating sealant 31 made of resin. The above-described printed circuit board is manufactured as described below according to the first embodiment (corresponding to claim 8) of the printed circuit board manufacturing method of the present invention. That is, first, as shown in FIG.
5, the pad part 17 for winding, the pad part 23 for input, and the pad part 25 for output are formed as a conductor pattern.

At the same time, the substrate body 11
Conductive patterns for forming various circuits are formed. next,
As shown in (b), a core member 19 is disposed so as to cover the plurality of winding conductors 15, and the core member 19 is
Is fixed by an insulating adhesive 33.

Next, as shown in FIG.
The winding conductor 21 is bonded across the
1, the winding pad portions 17 formed on the different winding conductor portions 15 are connected to each other. And finally,
As shown in (d), the winding conductor 21 and the core member 19
However, for example, with the insulating sealing agent 31 made of resin,
A printed circuit board sealed with the board body 11 and mounted with the magnetic component 13 is manufactured.

In the printed circuit board configured as described above, the core member 19 is arranged so as to cover the plurality of winding conductors 15 formed at intervals on the board body 11.
When the winding conductor 21 is disposed across the core member 19 and the winding pad portions 17 formed on the different winding conductor portions 15 are connected to each other, the winding conductor portion 15 and the winding conductor 21 are connected to each other, and Since the unit turns are formed, the magnetic component 13 can be easily manufactured.

Then, the manufacture and mounting of the magnetic component 13 can be performed at the same time, and the cost for the magnetic component 13 can be greatly reduced as compared with the related art. That is,
Actually, if there is bonding mounting equipment, the remainder is only the material cost, and since the constituent materials are the core member 19 and the sealant 31, the cost can be reduced.

Further, since wire bonding is used, the mounting time is very short. Further, in the above-described printed circuit board, the characteristics of the magnetic component 13 can be changed by changing the number of winding conductors 21, the position of the winding pad portion 17 to which the winding conductor 21 is connected, and the like.

That is, for example, as shown in FIG. 4, the code d'-e of the winding pad 17 is not connected by the winding conductor 21 and the code d 'of the winding pad 17 is
By connecting to the output pad section 25 by the connection conductor 29, the inductance of the magnetic component 13 can be easily changed.

For example, as shown in FIG. 5, the symbol a of the winding pad portion 17 is connected to the output pad portion 25 by the connection conductor 35, and the symbol e ′ of the winding pad portion 17 is connected to the connection conductor 37. By connecting to the input pad 23, the polarity of the magnetic component 13 can be easily changed. In the above-described printed circuit board, the winding conductor 21
Is connected to the winding pad 17 by bonding, so that the winding conductor 21 can be quickly and reliably connected to the winding pad 17.

Further, in the above-described printed circuit board, the input pad 23 and the output pad 25 are formed on the substrate main body 11, and the input pad 23 and the output pad 25 are connected to the connection conductors 27 and 29. As a result, the magnetic component 13 can be easily and reliably connected to the substrate circuit. In the above-described printed circuit board, the winding conductor 21 and the core member 1
9 is sealed in the substrate body 11, so that the insulating property is improved,
Further, the stability of the core member 19 can be improved.

In the above-described method of manufacturing a printed circuit board, the above-described printed circuit board can be easily and reliably manufactured. FIG. 6 shows a second embodiment (corresponding to claims 1 to 3) of a printed circuit board according to the present invention. In this embodiment, the printed circuit board 15 is provided on the input pad 23 side of the winding conductor 15. The reference numerals a, b, c, d, and e of the winding pad portion 17 to be arranged are all connected to the input pad portion 23 by the connection conductor 27.

The connection of the connection conductor 27 is performed by wire bonding. Note that, in this embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the printed circuit board of this embodiment, for example, as shown in FIG. 7, the connection conductor 27 for connecting the winding pad portion 17 and the input pad portion 23 is connected from the reference numeral e of the winding pad portion 17. By sequentially cutting with a cutting tool, the number of turns can be sequentially increased. Accordingly, by cutting the connection conductor 27, the inductance of the magnetic component 13 can be easily changed.

FIG. 8 shows a third embodiment (corresponding to claims 1 to 3) of a printed circuit board according to the present invention. In this embodiment, the substrate body 11 has a magnetic material comprising a transformer. The component 13A is mounted. The magnetic component 13A has a primary coil 39 and a secondary coil 41. That is, in this embodiment, the input pad portion is divided into the input pad portion 23a for the primary coil 39 and the input pad portion 23b for the secondary coil 41.

Further, the output pad is connected to the primary coil 3.
9 is divided into an output pad 25a for the secondary coil 41 and an output pad 25a for the secondary coil 41. The input pad 23a for the primary coil 39 is connected to the connection conductor 27.
The input pad portion 23b for the secondary coil 41 is connected to the winding pad portion 17 by a connection conductor 27b.

The output pad 25a for the primary coil 39 is connected to the winding pad 17 by the connecting conductor 29a.
And the output pad 25 for the secondary coil 41
b is connected to the winding pad portion 17 by a connection conductor 29b. Note that, in this embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the third embodiment, the same effects as in the first embodiment can be obtained. FIGS. 9 and 10 show a fourth embodiment (corresponding to claim 6) of a printed circuit board according to the present invention. In this embodiment, a magnetic component 13 composed of a coil is mounted on a board body 11A. Have been.

In this embodiment, the substrate body 11
For A, a multilayer substrate is used, and the winding conductor 15A is
It is formed on an inner layer of the substrate body 11. Both sides of each winding conductor 15A are provided with an IVH (Interstitial Via Hole) 4
3 is connected to a COH (Chip On Hole) 17A. The COH 17A is in a state of covering the IVH 43, and in this embodiment, the COH 17A is a pad for winding.

In this embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted. In the fourth embodiment, the same effect as in the first embodiment can be obtained. However, in this embodiment, since the winding conductor 15A is formed in the inner layer of the substrate body 11A, the winding conductor is formed. The portion 15A is shielded, so that noise emission can be reduced.

FIGS. 11 and 12 show a fifth embodiment (corresponding to claim 5) of a printed circuit board according to the present invention. In this embodiment, the board body 11B includes a magnetic component comprising a transformer. 13B is mounted. The magnetic component 13B has a primary coil 45 and a secondary coil 47. The primary coil 45 includes a secondary coil 47.
Is formed inside.

In this embodiment, the substrate body 11
For B, a multilayer board is used, and the winding conductors 15A and 15B of the primary coil 45 and the secondary coil 47 are formed in the inner layer of the board body 11B. Primary coil 4
5 and the respective winding conductors 15A, 1 of the secondary coil 47.
5B, both sides are IVH (Interstitial Via Hole) 4
COH (Chip OnHole) 17A, 17 via 3, 49
B.

The COHs 17A and 17B are made of IVH4
In this embodiment, the COHs 17A and 17B are winding pad portions of the primary coil 45 and the secondary coil 47 (hereinafter, this COH is referred to as winding pad portions 17A and 17B). It has been. In this embodiment, the winding conductors 21A and 21B connecting the winding pads 17A and 17B of the primary coil 45 and the secondary coil 47 are formed in a ribbon shape, and the primary coil 45 and the secondary coil 45 are formed by ribbon bonding. The side coils 47 are connected to the winding pads 17A and 17B.

Further, the winding conductors 21A and 21B of the core member 19, the primary coil 45 and the secondary coil 47 are sealed in the substrate body 11B by the sealing agent 31. Note that, in this embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. The above-described printed circuit board is manufactured, for example, as described below.

First, the winding conductor 1 of the primary coil 45
The core member 19 is bonded with an adhesive to the substrate body 11B on which the 5A, the winding pad 17A, the winding conductor 15B of the secondary coil 47 and the winding pad 17B are formed. Cured. next,
The winding conductor 2 of the primary coil 45 straddles the core member 19.
1A is ribbon-bonded.

Next, the winding conductor 21B of the secondary coil 47 is ribbon-bonded to the outside of the winding conductor 21A of the primary coil across the core member 19. Next, the winding conductor 21A of the primary coil 45, the winding conductor 21B of the secondary coil 47, and the core member 19 are sealed in the substrate body 11B by, for example, an insulating sealant 31 made of resin. .

Then, by hardening the sealant 31 in a curing furnace, a printed board on which the magnetic components 13B are mounted is manufactured. In the fifth embodiment, the same effects as those of the first embodiment can be obtained. However, in this embodiment, the winding conductors 21A and 21B of the primary coil 45 and the secondary coil 47 are formed in a ribbon shape. As a result, the coupling (degree of coupling) between the primary coil 45 and the secondary coil 47 can be sufficiently maintained.

That is, generally, in the transformer, if the coupling between the primary coil 45 and the secondary coil 47 is poor, the transmission from the primary coil 45 to the secondary coil 47 is poor, and the power loss is large. However, in this embodiment, since the winding conductors 21A and 21B of the primary coil 45 and the secondary coil 47 are formed in a ribbon shape, the facing area between the windings increases, and the primary coil 45 and the secondary coil The coupling with 47 is maintained, whereby the leakage inductance and the surge component can be sufficiently suppressed.

FIG. 13 shows a printed circuit board according to a sixth embodiment of the present invention (corresponding to claim 7). In this embodiment, the winding conductor is provided with insulation on the outer periphery of the bonding wire. Insulated winding conductor 21A is used. And the core member 19 is being fixed to the board main body 11 by the insulated winding conductor 21A.

This fixing is performed by wire bonding so that the insulated winding conductor 21A is in contact with the edge of the upper surface of the core member 19. Note that, in this embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. In this embodiment, the same effect as in the first embodiment can be obtained. However, in this embodiment, the core member 19 is fixed to the substrate body 11 by the insulated winding conductor 21A. Can be easily fixed.

In the above-described embodiment, an example in which the rectangular plate-shaped core member 19 is used has been described. However, the present invention is not limited to this embodiment.
As shown in FIG. 14, the rectangular annular core member 19A can be used horizontally, and as shown in FIG. 15, the rectangular annular core member 19B can be used vertically.

Further, in the above-described embodiment, an example in which the winding conductor 15 is formed perpendicular to the longitudinal direction of the magnetic component 13 has been described. However, the present invention is not limited to such an embodiment. As shown in FIG. 16, the winding conductor 15 </ b> C may be formed to be inclined with respect to the longitudinal direction of the magnetic component 13, and the winding conductor 21 may be bonded perpendicular to the longitudinal direction of the magnetic component 13. .

With such a configuration, the bonding operation can be facilitated. Further, in the above-described embodiment, an example in which the magnetic component 13 is formed linearly on the substrate main body 11 has been described. However, the present invention is not limited to such an embodiment. For example, as shown in FIG. The magnetic component 13C may be formed in an L shape, and the magnetic component 13D may be formed in a curved shape.

With such a configuration, the empty space of the substrate body 11 can be effectively used.

[0057]

As described above, in the printed circuit board according to the first aspect of the present invention, the core of the winding conductor is arranged in a state where the core member is disposed so as to cover the plurality of winding conductors formed at intervals on the substrate main body. When the members are straddled and the winding pad portions formed on different winding conductor portions are connected to each other, the winding conductor portion and the winding conductor are connected, and a unit turn of the winding is formed. Can be easily manufactured.

The characteristics of the magnetic component can be changed by changing the number of winding conductors, the position of the winding pad to which the winding conductor is connected, and the like. In the printed circuit board according to the second aspect, the winding conductor is connected to the winding pad portion by bonding, so that the winding conductor can be quickly and reliably connected to the winding pad portion.

In the printed circuit board according to the third aspect, an input pad section and an output pad section are formed on the board main body, and the input pad section and the output pad section are connected to the winding pad section by connecting conductors. As a result, the magnetic component can be easily and reliably connected to the substrate circuit. In the printed circuit board according to the fourth aspect, the winding conductor and the core member are sealed in the substrate body, so that the insulation property is improved, and
The stability of the core member can be improved.

In the printed circuit board according to the fifth aspect, since the winding conductor is formed in a ribbon shape, the coupling between the primary side and the secondary side is maintained particularly in the transformer since the facing area between the windings increases. Thus, the leakage inductance and the surge component can be sufficiently suppressed.
In the printed circuit board according to the sixth aspect, the conductor for winding is formed in the inner layer of the substrate main body, so that the conductor for winding is shielded, so that noise emission can be reduced.

In the printed circuit board according to the present invention, the core member is fixed to the substrate body by the insulated winding conductor, so that the core member can be easily fixed. According to the printed circuit board manufacturing method of the eighth aspect, the printed circuit board of the first aspect can be easily and reliably manufactured.

[Brief description of the drawings]

FIG. 1 is a top view showing a first embodiment of a printed circuit board according to the present invention.

FIG. 2 is a sectional view showing the printed circuit board of FIG.

FIG. 3 is an explanatory view showing a method of manufacturing the printed circuit board of FIG. 1;

FIG. 4 is an explanatory diagram showing a state in which the number of turns is changed in the printed circuit board of FIG. 1;

FIG. 5 is an explanatory view showing a state where the polarity is changed in the printed circuit board of FIG. 1;

FIG. 6 is a top view showing a second embodiment of the printed circuit board of the present invention.

FIG. 7 is an explanatory diagram showing a state in which the number of turns is changed on the printed circuit board of FIG. 6;

FIG. 8 is a top view illustrating a printed circuit board according to a third embodiment of the present invention.

FIG. 9 is a top view illustrating a printed circuit board according to a fourth embodiment of the present invention.

FIG. 10 is a sectional view showing the printed circuit board of FIG. 9;

FIG. 11 is a top view illustrating a printed circuit board according to a fifth embodiment of the present invention.

FIG. 12 is a sectional view showing the printed circuit board of FIG. 11;

FIG. 13 is a sectional view showing a sixth embodiment of the printed circuit board of the present invention.

FIG. 14 is a perspective view showing another example of the core member.

FIG. 15 is a perspective view showing another example of the core member.

FIG. 16 is a top view showing an example in which a winding conductor is formed inclined.

FIG. 17 is a top view illustrating a shape example of a magnetic component.

FIG. 18 is a perspective view showing a conventional method for manufacturing a magnetic component.

[Explanation of symbols]

 11, 11A, 11B Board main body 13, 13A, 13B, 13C, 13D Magnetic component 15, 15A, 15B, 15C Winding conductor 17, 17, A, 17B Winding pad 19, 19A, 19B Core member 21 Winding conductor 21A Insulation Winding conductor 23 Input pad portion 25 Output pad portion 27, 29 Connection conductor 31 Sealant

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Nakahara 1-17-3, Sakado, Takatsu-ku, Kawasaki, Kanagawa Prefecture Inside Fuji Denso Co., Ltd. (72) Minoru Tomoike 1-17, Sakado, Takatsu-ku, Kawasaki, Kanagawa Prefecture No. 3 F term in Fuji Denso Co., Ltd. (reference) 5E062 FF01 FF02 FG01 FG12 5E070 AA01 AA11 AB05 BA07 CA02 CC04 CC10 DA11 DB02 DB06 EA02 EA10 5E336 AA04 AA11 BC34 CC32 CC51 EE05

Claims (8)

[Claims] 1. A printed circuit board having a magnetic component mounted on a substrate main body, wherein the magnetic component includes a plurality of winding conductors formed at intervals on the substrate main body, and the respective windings of the substrate main body. A winding pad portion formed on both sides of the conductor portion; a core member disposed to cover the plurality of winding conductor portions; and a core member disposed over the core member and formed on the different winding conductor portions. And a winding conductor for connecting the winding pads to each other. 2. The printed circuit board according to claim 1, wherein said winding conductor is connected to said winding pad portion by bonding. 3. The printed circuit board according to claim 1, wherein an input pad portion and an output pad portion are formed on the substrate main body, and the input pad portion and the output pad portion are connected to a connection conductor. A printed circuit board characterized by being connected to the pad part for winding by means of: 4. The printed circuit board according to claim 1, wherein the winding conductor and the core member are sealed in the substrate body. 5. The printed circuit board according to claim 1, wherein the winding conductor has a ribbon shape. 6. The printed circuit board according to claim 1, wherein the conductor for winding is formed in an inner layer of the substrate main body. 7. The printed circuit board according to claim 1, wherein said core member is fixed to said substrate body by said winding conductor. 8. A step of forming winding conductors at intervals on a substrate body, forming winding pad portions on both sides of each of the winding conductors, and covering the plurality of winding conductors. Arranging a core member, bonding a winding conductor over the core member, and connecting the winding pad portions formed on the different winding conductor portions by the winding conductor to each other. A method for manufacturing a printed circuit board, comprising: