JPH0347306Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The present invention relates to a composite inductor board that has a plurality of inductors in a magnetic substrate, and is suitable for applications such as LC filters and delay lines. It is related to the structure of

[Prior art]

With the demand for smaller and more complex electronic components, the use of multilayer chip components is progressing, and the development of multilayer inductors is also progressing following multilayer capacitors. LC filters, which have an inductor attached to a dielectric substrate with a capacitor formed thereon, are also used. Furthermore, composite parts in which an inductor and a capacitor are integrally formed are also being considered.

As mentioned above, a multilayer inductor is attached as an individual component to a dielectric substrate on which multiple capacitors are formed to form an LC filter, etc., but depending on the application, there may be a limit to miniaturization. . This can be considered because the dimensions of the multilayer inductor are larger than the dimensions of the multilayer capacitor.

Further, when a plurality of inductors are used close to each other, a problem of coupling occurs between them, which becomes a particularly serious problem in delay lines and the like.

[Purpose of invention]

An object of the present invention is to solve the above problems and provide a composite inductor substrate suitable for electronic components requiring a plurality of inductors.

Another object of the present invention is to obtain a composite inductor board that can change the number of inductors used depending on the type of electronic component.

Furthermore, it is an object of the present invention to obtain a composite inductor substrate in which electronic components can be miniaturized and coupling can be easily controlled.

[Summary of the idea]

The present invention horizontally arranges laminated inductors made up of conductor layers laminated and connected in a figure-eight shape inside a magnetic substrate, and by forming grooves on the substrate surface between these inductors. The above object is achieved by making the magnetic substrate divisible.

In other words, it is a composite inductor board that includes a plurality of inductors within a magnetic substrate, and this inductor has a conductor orbiting two predetermined points within the magnetic body.
It consists of laminated inductors connected in a figure-eight shape so as to intersect with each other through a magnetic material at a position between the two points, and a plurality of these inductors are arranged at intervals in the lateral direction of the figure-eight shape, and these inductors It is characterized by having grooves on the surface of the magnetic substrate between them.

[Example of idea]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a perspective view of an embodiment of the invention. The magnetic substrate 10 is made by laminating ferrite, and a conductive layer 11 is formed between the layers to constitute an inductor. The conductor layers 11 are connected and stacked in a figure-eight shape, and FIG. 2 shows the structure thereof. The structure is such that it orbits around two points and intersects at a position midway between the two points.
Therefore, the direction of winding is opposite between the part that goes around one point and the part that goes around another point, and the direction of the current is also opposite. The magnetic field generated thereby also has the opposite direction.

By alternately laminating conductive layers and magnetic layers as described above and forming relatively thick magnetic layers on the top and bottom surfaces, the area surrounded by the conductive layer and the upper and lower magnetic layers A magnetic circuit is formed in which the magnetic fields are aligned in one direction. Therefore, even if the number of laminated turns is small, the inductance can be increased.

A plurality of inductors thus formed are arranged at intervals in the lateral direction of the figure eight. and,
A groove 12 is formed on the surface of the magnetic substrate 10 between the inductors.
is formed.

The magnetic substrate 10 can be formed by laminating green sheets or by printing. Further, the conductive layer 11 can be formed in the same manner by connecting with through holes or by printing alternately with magnetic material. The ends of the conductor layer may be drawn out to the side surface of the substrate, or may be drawn out to the upper and lower surfaces.

A plurality of inductors are formed while being laminated at the same time, and this may be done by the same process as for normal laminated inductors.

Various modifications of the composite inductor substrate according to the present invention are possible. By changing the direction in which the inductors are wound, the coupling between adjacent inductors can be adjusted. Furthermore, the bonding state can be changed depending on the depth and width of the groove. However, it is generally suitable for use when winding in the same direction to reduce coupling.

By forming a wiring pattern on the surface of the board, it is possible to
LC composite parts can be easily assembled.

[Effects of the Invention] According to the present invention, a composite inductor substrate including a plurality of inductors having sufficient inductance can be obtained. This not only makes it possible to downsize LC composite parts, but also makes assembly easier.

Furthermore, it can be divided by grooves, and any number of inductors can be selected and used depending on the application.

Furthermore, the state of coupling can be changed depending on the application, and the coupling between adjacent inductors can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention,
FIG. 2 is a perspective view of a conductor layer that becomes the inductor. 10...Magnetic substrate, 11...Conductor layer, 12
……groove.

Claims (1)

[Scope of utility model registration request] A composite inductor board that includes a plurality of inductors within a magnetic substrate, in which a conductor orbits two predetermined points within the magnetic body and intersects through the magnetic body at a position midway between the two points. A composite comprising laminated inductors connected in a figure 8 shape, the inductors being spaced apart in the lateral direction of the figure 8 shape, and grooves provided on the surface of the magnetic substrate between the inductors. Inductor board.