JPH03225905A - Multilayer composite parts and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain a multilayer composite parts which can provide a desired capacitance between an inductor by a method wherein a conductor pattern forming the capacitance is disposed between surrounding conductor patterns. CONSTITUTION:A conductor pattern is formed on a magnetic sheet 30 through screen printing or the like. A conductor pattern 32a of about half turn constituting an inductor and a conductor pattern 34 for forming capacitance are formed on a same surface of one magnetic sheet 30a. The conductor patterns 34 for forming the capacitance are formed at positions opposing to the conductor patterns for constituting inductors which are formed on the upper and lower magnetic sheets. Only the conductor pattern 32b for constituting the inductor is formed on the other magnetic sheet. Two types of such magnetic sheets are laminated alternately and the conductor patterns constituting the inductor are then connected, by means of a through-hole conductor, at the end thereof. Since the conductor patterns constituting the inductor and the conductor patterns constituting the capacitance are disposed alternately in the direction of lamination, the capacitance can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a laminated composite component in which a laminated inductor and a capacitor are integrally formed, and a method for manufacturing the same.

[Prior art]

With the demand for smaller and thinner electronic components, the field of inductors has come to use multilayer inductors in which a circulating conductor pattern is formed by printing within an insulating ceramic layer instead of winding a wire. It has become. Also, LC composite parts in which this and a capacitor are integrally formed are also used.

Among them, as shown in FIG. 4, elements that form inductance and capacitance are often used as filters, delay lines, etc.

Conventionally, in order to realize the circuit shown in FIG. 4, a laminated composite component as shown in FIG. 5 has been used. this is,
A conductor pattern 52 that overlaps and circulates in the lamination direction and a conductor pattern 54 that is formed to face the conductor pattern 52 in the horizontal direction are formed in a laminate 50 of an insulator such as a magnetic material. Conductor pattern 52 and conductor pattern 54
A capacitance is formed between the two.

〔assignment〕

In the laminated composite component as described above, the conductor pattern is as thin as several tens of micrometers, and the facing area in the horizontal direction is small, so that sufficient capacitance cannot be obtained.

The present invention provides a laminated composite component that can form a desired capacitance with an inductor.

[Means to solve the problem]

The present invention solves the above problem by arranging conductors facing each other in the stacking direction to increase the facing area.

That is, in a laminated composite component that includes a conductor pattern that overlaps in the lamination direction while connecting the ends between insulating layers, and a conductor pattern that forms a capacitance with the conductor pattern, the conductor pattern that forms the capacitance is It is characterized by being placed between conductor patterns.

In addition, in order to obtain the laminated composite part, a conductor pattern is formed in which the insulating layers are overlapped in the lamination direction while their ends are connected;
In the method for manufacturing a laminated composite component comprising a conductor pattern forming a capacitance with the conductor pattern, a conductor pattern of about half a turn and a through hole at one end of the conductor pattern, which is insulated from the conductor pattern and connected to the conductor pattern of the next half turn. A first insulating sheet with conductor patterns facing in the stacking direction and a second insulating sheet with a conductor pattern of about half a turn and a through hole at one end are formed, and these two types of sheets are alternately formed. The feature is that the through holes are filled with conductors and connected while being laminated.

It is also possible to stack the sheets on which both conductor patterns are formed while changing their orientation.

[Effect]

Since the conductor patterns constituting the inductor and the conductor patterns constituting the capacitor are alternately located in the stacking direction, the capacitance can be increased.

Furthermore, this structure can be realized by using a sheet on which two conductive patterns are formed, which is difficult to achieve using the commonly used printing method.

〔Example〕

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

FIG. 1 is a plan view showing an embodiment of the present invention.

Laminated body 10 of fired bodies of magnetic ceramics such as ferrite
A conductor pattern 12 forming a coil pattern is formed inside. The conductor patterns 12 forming this coil pattern are connected between magnetic sheets by conductors whose ends are filled with through holes, and are overlapped in the lamination direction by about half a turn.

The conductor patterns at both ends are drawn out to the end face of the laminate 10,
Connected to external terminal 16.

A conductor pattern 14 for forming a capacitance is also formed within the laminate 10. This conductor pattern 14 is arranged so as to overlap and face a part of the conductor pattern 12 forming the coil pattern in the stacking direction. This capacitor forming conductor pattern 14 is insulated from the coil forming conductor pattern.

FIG. 2 shows a front sectional view thereof. A conductor pattern 12 is wound around inside the laminate 10 to form a coil. In FIG. 2, conductor patterns 14 serving as capacitors are formed every other layer and are opposed to the conductor pattern 12, with a length shorter than the half turn of the conductor pattern 2 on the right half. The reason why the length of the conductor pattern 14 is less than half of the length of one turn of the coil-forming conductor pattern 12 is because the conductor pattern 12 is formed in approximately half turns and laminated, so two conductors This is to prevent the patterns from touching.

The conductor pattern 14 for forming a capacitance is formed integrally with a conductor pattern drawn out from one point to an end, and is connected to an external electrode 18 .

Note that the length and width of the conductor pattern for forming a capacitor can be arbitrarily selected depending on the required capacitance. Moreover, the number can also be changed.

The above example shows an example in which an inductor and a capacitor are formed as a pair, but when used as a filter, delay line, etc., a plurality of inductors and capacitors may be integrally formed inside one laminate.

Next, a method for manufacturing the above laminated composite part will be explained.

FIG. 3 is a perspective view showing an embodiment of the present invention.

A binder is added to ferrite powder such as Ni-Zn to form a slurry, and the slurry is made into a slurry of several tens of μm using a doctor blade method, etc.
The magnetic sheets 30 having a thickness of .

A conductive pattern is formed on the magnetic sheet 30 by screen printing or the like. Two types of conductor patterns are formed on the sheet. On one of the magnetic sheets 30a, a conductor pattern 32a of approximately half a turn constituting an inductor and a conductor pattern 34 for forming a capacitance are formed on the same surface. A conductive pattern 34 for forming a capacitance is formed at a position facing the conductive pattern constituting the inductor formed on the upper and lower magnetic sheets. This conductor pattern 34 is insulated from the conductor pattern 32a. A through hole 35a is formed at the end of the conductor pattern 32a and filled with a conductor.

Only a conductor pattern 32b constituting an inductor is formed on the other magnetic sheet 1-30b. One end of this conductive pattern 32b is connected to the through hole 35a of the magnetic sheet 30a, and the other end is connected to the through hole 35a of the magnetic sheet 30a.
It is formed up to the position b.

The two types of magnetic sheets as described above are stacked alternately, and the ends of the conductor patterns constituting the inductor are connected by through-hole conductors.

After laminating the sheets, they are divided into chips and fired, and then external terminal electrodes are formed to obtain a laminated composite part.

Incidentally, the magnetic sheets on which both the conductor pattern constituting the inductor and the conductor pattern for forming the capacitor are formed may be laminated with their orientations changed. In this case, if the number of laminated sheets is the same, it is possible to obtain twice the capacity as compared to the embodiment of FIG. 3.

Furthermore, the conductor may be filled into the through-holes either during sheet formation or during lamination.

〔effect〕

According to the present invention, it is possible to obtain a large capacitance between the inductor and the portion corresponding to the winding.

This is because the conductor pattern is thin and cannot provide a large opposing area in the horizontal direction, but a opposing area of 100 μm or more can be obtained in the stacking direction.

In addition, although it is difficult to form the above structure with the printing method, it is possible to achieve it with the present invention using the sheet method.
Furthermore, only the addition of a conductor pattern is required, which is advantageous in terms of man-hours and costs.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a front sectional view thereof, and FIG. 3 is a perspective view showing a manufacturing method according to the present invention. FIG. 4 is an equivalent circuit diagram of an element obtained by the present invention, and FIG. 5 is a plan view of a conventional laminated composite component. 0 10... Laminate, 30... Magnetic sheet 12.
32... Conductor pattern,

Claims (7)

[Claims] (1) In a laminated composite component that includes a conductor pattern that overlaps in the lamination direction while connecting the ends between insulating layers, and a conductor pattern that forms a capacitance with the conductor pattern, the conductor pattern that forms the capacitance is A laminated composite component characterized by being sandwiched between conductive patterns. (2) The laminated composite component according to claim 1, wherein the conductor pattern forming the capacitor is formed to face the circumferential conductor pattern by a length of less than half a turn. (3) The laminated composite component according to claim 1, wherein the external terminal connected to the conductive pattern forming the capacitance is formed on a different end surface from the external terminal connected to the circulating conductive pattern. (4) The laminated inductor according to claim 1, wherein a plurality of conductor patterns forming the capacitance are formed in different sets in the lamination direction. (5) In a method for manufacturing a laminated composite component comprising a conductor pattern overlapping in the lamination direction with ends connected between insulating layers, and a conductor pattern forming a capacitance with the conductor pattern, the conductor pattern of about half a turn and its a through hole at one end, a first insulating sheet formed with a conductor pattern that is insulated from the conductor pattern and facing the next half turn of the conductor pattern in the lamination direction; A method for producing a laminated composite part, comprising: molding a second insulating sheet with through holes formed therein, and laminating the two types of sheets while alternately filling the through holes with conductors and connecting them. (6) The method for manufacturing a laminated composite component according to claim 4, wherein the through hole is filled with a conductor in advance and an insulating sheet is laminated. (7) A method for manufacturing a laminated composite component comprising a conductor pattern that overlaps in the lamination direction while connecting the ends between insulating layers, and a conductor pattern that forms a capacitance with the conductor pattern. A through hole at one end is insulated from the conductor pattern, and an insulating sheet is formed with a conductor pattern that faces the next half-turn conductor pattern in the stacking direction.The sheet is alternately turned, and the conductor pattern is insulated from the through hole. A method for manufacturing a laminated composite part, characterized by laminating the parts while filling and connecting them.