JPS5924535B2 - Laminated composite parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laminated composite component, and more particularly to a chip-type laminated composite component whose components include an inductor and a capacitor.

Conventional composite components have been difficult to combine and downsize because the inductor has large dimensions and the manufacturing method for inductors is completely different from that for capacitors.

Capacitors are becoming thinner and smaller, as seen in multilayer chip capacitors, but inductors require a conductor to be wound around a magnetic core, which has been an obstacle to miniaturization. In order to solve this problem, the present inventor filed a patent application in 1973.
-22548 etc. proposed chip-shaped laminated composite parts using printing or sheet methods.

To summarize, the conductor pattern for the inductor, the electrode pattern for the capacitor, the dielectric thin film,
Magnetic thin films are printed and laminated in an appropriate order, a chip-shaped laminate is formed and fired, and an external terminal is connected to the end of the conductor pattern exposed at the edge of the laminate. It was burned into the edges. This method provided benefits such as miniaturization of composite parts and cost reduction for mass production. As an application of the above technology, the present invention provides a laminated composite component having a circuit configuration that can be used, for example, as a dual type noise filter.

An object of the present invention is to provide a laminated composite component in which a plurality of inductance elements and capacitor elements are incorporated into one component.

The laminated composite part of the present invention is manufactured using printing technology,
The resulting component is a small chip-shaped component with a large number of external terminals.

The laminated composite part of the present invention can produce a large number of L,
Since it is possible to include a C element, process efficiency and mass production can be achieved, and the characteristics of the product can be stabilized. The chip-shaped or monolithically structured laminate components of the present invention also have assembly benefits, such as ease of attachment to printed circuit boards and the like. Briefly describing the present invention, a plurality of conductors are printed in parallel on the surface of a thin magnetic material, a thin magnetic material is provided on top of the conductors, and a thin dielectric material for a capacitor is further placed on top of that. and then print electrodes for the capacitor.

In this case, the conductors and electrodes are exposed to the sides of the laminate. The invention will be explained in detail below in conjunction with the drawings.

The magnetic material used in the present invention is obtained by forming a paste of magnetic powder such as magnetic oxide ferrite together with an appropriate binder into a thin plate using a printing method. It is preferable to use magnetic powder that has electrical insulation properties after firing. The dielectric materials used in the present invention are TiO2, Ba3O4
It is constructed by making a paste of a ceramic powder such as the above with a suitable binder and forming it into a thin plate by a printing method, or by stretching it into a sheet by extrusion molding or the like. Conductors such as electrodes and terminals used in the present invention are obtained by forming a paste of metal powder such as Ag-Pd with a suitable binder into a thin plate shape by a printing method. It is preferable that electrodes and other conductors subjected to firing are formed using heat-resistant metal powder such as Ag-Pd, and external terminals are formed using conductive metal powder such as Ag. 1 to 9 show the laminated composite part of the present invention and its manufacturing process.

FIG. 1 explains a practical method for implementing the present invention. First, a base film B such as polyethylene terephthalate is prepared, and a thin plate (film)-shaped magnetic material 1 is placed on it.
is printed or superimposed. When "printing" is mentioned, it is assumed that a magnetic material, dielectric material, conductor, electrode, etc. are formed into a thin plate by a printing method, and that a drying process is performed after printing. Furthermore, when referring to the word "superposition", it is assumed that dielectric materials and magnetic materials preformed into sheet shapes are overlapped. Referring again to FIG. 1, the magnetic material 1 is divided by lines A and b, but in reality these lines are imaginary, and each layer is formed following the magnetic material 1, and finally a suitable layer is formed. Cut along these lines with a single cutter.
Hereinafter, in order to simplify the explanation, only one section of the laminated composite component will be explained. FIG. 2 shows only one section of the magnetic body 1 (base B is not shown).

Following the process shown in FIG. 2, a plurality of conductors 2 having terminals T1 to T5 and T1' to T5' extending vertically in parallel and exposed on the upper and lower sides of the magnetic body 1 are printed on the surface of the magnetic body 1. Moving to the step shown in FIG. 4, the magnetic material 3 is printed or superimposed so as to cover the entire surface of the D1 magnetic material 1. Next, a dielectric material 4 is printed or superimposed on this magnetic material 3. An electrode 5 having terminals T6 and T6' exposed on the left and right sides of the laminate is then printed on the surface of the dielectric 4, and finally a dielectric or magnetic material 6 is printed thereon. Once the above steps have been completed, the laminate is cut along lines A and b as described in connection with FIG. 1 to form the individual laminates shown in FIG. It can be seen that T1 to T6 and Tl' to T6' are exposed from each side of the laminate. Next, this laminate is placed in a firing furnace and fired at an appropriate firing temperature, and then individual external terminals are fired for terminals T, -T6 and T1 (T6') as shown in FIG.
The laminated composite part completed in this way has various characteristics.

First, since a plurality of conductors 2 are simultaneously formed in parallel, a plurality of parallel inductors are formed together with the magnetic bodies 1 and 3 above and below them. Further, the conductor 2 further forms a plurality of capacitors with the electrode 5 via the dielectric 4. Therefore, as shown in FIG. 10, a circuit consisting of a plurality of inductors and capacitors is constructed. Furthermore, since the terminals of the conductor 2 and the electrode 5 are all arranged on the side of the laminated composite component, the composite component of the present invention can be easily attached to the printed wiring formed on the printed circuit board. The composite parts of the present invention can be manufactured by a printing method or a combination of the printing method and a sheet form, so that process efficiency and quality stability can be achieved. It will be obvious to those skilled in the art that other modifications of the present invention are possible.

For example, the dielectric or magnetic material 6 may be replaced by other insulators - and the damper may be used if the interlayers are reactive (on firing) or if the magnetic materials 1, 3 are electrically conductive. A layer of a material or an insulating material may be formed on the surface of the magnetic bodies 1 and 3.

[Brief explanation of the drawing]

1 to 7 show sequential steps for manufacturing the laminated composite part of the present invention, with the left side being a plan view and the right side being a sectional view. FIG. 8 is a perspective view showing the layered body after the step of FIG. 7.
Figure 9 is a perspective view of the completed laminated composite part, and Figure 10 is a perspective view of the completed laminated composite part.
The figure is an equivalent circuit diagram of the same component. In the figure, the main symbols are D as follows. 1, 3: magnetic material, 2: conductor, 4: dielectric material, 5: electrode, T1 to T6, Tl' to T6': terminal.

Claims (1)

[Scope of Claims] 1. A conductor constituting a plurality of inductances is provided on a first magnetic thin plate, a second magnetic thin plate is provided thereon, and a dielectric thin plate is provided on the second magnetic thin plate. A laminated composite part consisting of a thin electrode plate formed through a laminate. 2. The laminated composite component according to item 1, wherein the conductor constituting the inductance and the electrode thin plate are exposed on different surfaces of the laminated composite component.