JPH01151211A - Structure of laminate-applied component - Google Patents

Abstract

PURPOSE:To obtain a high inductance with a small size by a method wherein magnetic substance layers and spiral-shaped conductors are laminated alternately and end parts of the individual conductors are connected in such a way that magnetic flux generated at the individual conductors are exerted mutually. CONSTITUTION:A conductor 1 for coil formation use has a structure where two or more spiral-shaped conductors 1a-1f and magnetic substance layers are laminated alternately; extraction electrodes 2, 3 are connected to the conductor 1a at the lower end and to the conductor 1f at the upper end in the figure. The conductors 1a-1f at the individual layers are formed in such a way that their mutually adjacent spiral directions are to be reverse directions; the conductors which are adjacent in a laminate direction are connected in such a way that corresponding inner neds of the conductors or corresponding outer ends of the conductors are connected. When electricity is applied to the extraction electrodes 2, 3 after the spiral direction has been selected and the conductors have been connected in this manner, magnetic flux PHI generated at the individual conductors 1a-1f is directed in an identical direction. By this setup, a high inductance can be obtained with a small size.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a structure of a laminated application component mainly consisting of a laminated inductor manufactured by alternately laminating and sintering a coil-forming conductor and a magnetic material. Regarding.

(Prior art) Laminated applied parts such as laminated inductors or laminated transformers are made by using two materials: one made by making a paste of ferrite powder with high electrical insulation properties using a binder, and the other made by making a paste of conductor powder for forming a coil with a binder. The layers are alternately laminated using a printing method so that one (or a plurality of independent half coils) are formed on one laminated surface, and the conductor pattern for the coil is sequentially connected from one magnetic layer to the next. Create a laminate formed into a coil shape,
It is manufactured by firing this.

(Problems to be Solved by the Invention) Conventional laminated applied parts having an inductance component such as laminated inductors manufactured as described above have one half coil or a plurality of independent coils on one laminated surface. is formed, and there is a problem that there is a limit to obtaining a high inductance.

(Means for Solving the Problems) In order to solve the above problems and provide a multilayer application component that is small and has a high inductance value, the multilayer application component of the present invention has a magnetic layer and a spiral conductor. Stacked alternately,
It is characterized in that the ends of each conductor are connected so that the magnetic fluxes generated by each conductor add to each other.

(Example) FIG. 1 is a diagram showing a conductor pattern, a wire connection, and a flow of magnetic flux caused by energizing the conductor of an example of the laminated applied component according to the present invention. This example shows a laminated inductor, and the coil-forming conductor l has a structure in which a plurality of spiral conductors 1a to lf and magnetic layers (not shown) are alternately laminated. Extracting electrodes 2.3 are integrally connected to each end of the lower end conductor 1a and the upper end conductor If in the drawing. In this example, the conductors 1a to If of each layer are arranged so that the spiral directions of adjacent ones are opposite to each other (i.e. la, lc, le are right-handed, lb, ld, If
(left-handed), and the conductors adjacent in the stacking direction alternately connect the corresponding inner ends of the conductors or the outer ends of the conductors. That is, the inner end of the first layer conductor 1a and the inner end of the second layer conductor tb are connected as shown by point 1ia, and the outer end of the second layer conductor 1b and the third layer conductor 1 are connected.
Connect the outer end of the third layer conductor 1c as shown by the dotted line, and connect the inner end of the third layer conductor 1c and the inner end of the fourth layer conductor 1d as shown by the dotted line C. There is. By selecting and connecting the spiral direction in this manner, when current is applied between the extraction electrodes 2 and 3, the direction of the magnetic flux Φ generated in each conductor 1a to If is the same as shown in the figure.

Fig. 2 is a manufacturing process diagram of the laminated applied parts shown in Fig. 1. First, as shown in Fig. 2 (1), the substrate (not shown) is
An insulating paste made of ferrite powder having high electrical insulation properties and a binder is applied thereon by printing to form a base 4a which is a magnetic layer.

Next, as shown in FIG. 2(2), the extraction electrode 2 and the first layer spiral conductor la connected thereto are formed by printing a conductive paste. This conductor 1a
The conductive paste forming the lead electrodes 2 and the like is made by mixing metal powder such as Ag, Ag-Pd, Cu, Ni, Pd, etc., and a binder.

Next, as shown in FIG. 2(3), the insulating paste is applied onto the base 4a and the conductor la so as to cover the entire area, leaving a window X that surrounds the inner end of the conductor 1a. The magnetic layer 4b is formed by printing.

Next, as shown in FIG. 2(4), a second layer conductor 1b wound in the opposite direction of the first layer conductor 1a is placed on the magnetic layer 4b so that its inner end is in the same direction as the first layer conductor 1a. It is formed so as to overlap the inner end of the first layer conductor 1a at a connecting portion a.

Next, as shown in FIG. 2(5), the insulator is placed on the magnetic layer 4b and the conductor lb so as to cover the entire area, leaving a window X that surrounds the outer end of the conductor ib. The magnetic layer 4c is formed by printing paste.

Similarly, formation of the third layer conductor 1c (6), formation of the magnetic layer 4d (7), and formation of the fourth layer conductor 1d (8)
, Formation of magnetic layer 4e (9), Formation of fifth layer conductor 1e (10), Shape of Si layer 4f! (11) After forming the sixth layer of conductor If (12), the entire surface is covered with a base 4g which is a magnetic layer to obtain an intermediate laminate.

Next, this intermediate laminate is fired in, for example, an inert gas, and external terminals (not shown) connected to the extraction electrodes 2 and 3 are formed by baking a conductive paste to obtain a laminated inductor.

Inductance is proportional to the square of the number of coil turns N, but the laminated inductor manufactured as described above has a large number of coil turns, so if the number of laminated layers is the same,
It has a much larger inductance value than conventional ones. Further, as in the above embodiment, the spirals of the conductors 1a to 1F formed in layers adjacent to each other in the stacking direction are configured to be opposite to each other, and the inner ends and outer ends of the adjacent conductors are arranged alternately. If they are connected to each other, there is no need to form conductors for connection between conductors in the direction that crosses the spirals, unlike when they are all wound in the same direction, and it is possible to form a thinner conductor. It has the advantage that there is no disturbance.

In the above embodiment, one spiral conductor was formed on one laminated surface, but if two or more conductors are formed on the same layer as shown in FIG. 3 or 4, the inductance value can be further increased. A high multilayer inductor can be obtained. In FIGS. 3 and 4.

la and la', 1b and 1b', 1c and 1c', 1d and l
d' indicates a spiral conductor formed on the same plane, and in the example of FIG. The magnetic flux formed is configured such that the magnetic flux formed by the conductors 1a' to ld' in the right row is added to each other. Further, in the example shown in FIG. 4, conductors formed on the same layer are connected to each other.

FIG. 5 is a diagram showing an application example of the present invention, in which column (A) is a perspective view, column (B) is a perspective view, column (C) is a circuit diagram, and column (D) is a characteristic diagram. The drawings are for each direction of lateral force.

The chip inductor of FIG. 5(1) has a main body 6 configured as in the embodiment described above, that is, a multilayer spiral conductor l is formed in the magnetic body 4, and a pair of external terminals are provided on the outer surface. 5.

The chip transformer shown in FIG. 5(2) has a main body 7 formed by providing the chip inductor shown in FIG. 5(1) with an intermediate lead-out electrode 8, and an external terminal 5A connected to the middle lead-out electrode 8. It is.

The chip trap shown in FIG. 5(C) has a capacitor 9 made of a dielectric material and a sheet-like electrode, and an inductor body 6 that overlap integrally, and a pair of external terminals 5 that connect them in parallel and connect them to the outside. As shown in the characteristic diagram (0), the attenuation amount reaches a maximum at the resonance frequency f, .

The chip IFT shown in FIG. 5(4) has a configuration in which the transformer shown in FIG. 5(3) is provided with an intermediate lead-out electrode 8 and an external terminal 5A connected thereto, and the amount of attenuation is minimum at the resonance frequency f0. This is the result.

The chip filter in FIG. 5 (5) includes a multilayer inductor 6A in which a plurality of coils l as shown in FIGS. 1 and 2 are formed in a magnetic body, and a multilayer capacitor 9A in which a plurality of capacitors are formed. By stacking them together and connecting the external terminal 5 to other circuits, a low pass filter, a bypass filter, a band pass filter, a delay line, and a hunt reject filter are constructed.

The above explanation was about an example in which an insulator paste and a conductor paste containing magnetic material powder were printed and formed one on top of the other. The present invention can also be applied to the case where a laminate is manufactured by doing so.

(Effects of the Invention) As described above, the laminated applied component of the present invention has magnetic layers and spiral conductors alternately laminated, and the ends of each conductor are connected to each other by magnetic flux generated by each conductor. Since the coils are connected in this way, the number of coil turns is increased, and a compact laminated application component with a high inductance value can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the conductor pattern, wire connection, and flow of magnetic flux generated by energizing the conductor of an embodiment of the laminated applied component according to the present invention; Fig. 2 is a diagram showing the manufacturing process; 4 and 4 are views showing other embodiments of the laminated applied parts according to the present invention corresponding to FIG. 1, and FIG. 5 is a view showing an applied example of the present invention, in which (A) is a perspective view. figure,
(B) is a perspective diagram, (C) is a circuit diagram, and (D) is a characteristic diagram.

Claims (3)

[Claims] 1. A structure of a laminated application component characterized by alternately laminating magnetic layers and spiral conductors, and connecting the ends of each conductor so that the magnetic fluxes generated by each conductor are added to each other. 2. The conductor is constructed such that the spirals formed in adjacent layers are reversely wound, and the inner ends and outer ends of the adjacent conductors are alternately connected to each other. Structure of the laminated applied part described in Section 1. 3. The structure of a laminated applied component according to claim 1, wherein a plurality of said spiral conductors are provided on one laminated surface.