JPS5933247B2 - 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.

In conventional composite parts, the dimensions of the inductor are large, and the manufacturing method for inductors is completely different from the manufacturing method for capacitors, so it has been difficult to make them more complex and smaller.

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 conductor pattern for the capacitor, the dielectric thin film,
Magnetic thin films are printed and laminated in an appropriate order to form a chip-shaped laminate, which is fired, and an external terminal is connected to the end of the conductor pattern exposed at the edge of the laminate. It was burnt onto the edge of the. Although this method provides benefits such as miniaturization and mass production of composite parts, it has been found that it has some problems. In other words, one of the problems is that the number of manufacturing steps is large, making it difficult to simplify the work.The other problem is that during firing, there is There are differences in details,
Also, due to the problem of mutual reactions during firing, cracks, warping, deterioration of properties, and slight variations in quality of composite parts are observed. The present invention provides a laminated composite component having a structure that can simplify the manufacturing process, and as a preferred example, improves the yield by using a composite damper material. The invention will be explained in detail below in conjunction with the drawings.

In the present invention, the bright magnetic material is obtained by forming a paste of magnetic powder such as magnetic oxide ferrite together with a suitable 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 used in the present invention is TiO, Ba, O4
, etc. is made into a paste with a suitable binder and formed into a thin plate by a printing method, or it is formed into a sheet by extrusion molding or the like.
The conductor such as the electrode terminal portion used in the present invention is obtained by forming a paste of metal powder such as Ag-Pd with a suitable binder into a thin plate 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. The damper material used in the present invention is a paste made of powder of glass, alumina, or a mixed sintered body of ferrite and dielectric, which has a firing shrinkage ratio between that of ferrite magnetic material and dielectric material, and is printed into a thin plate. Alternatively, it may be formed into a sheet by extrusion molding. 1 to 11 are diagrams showing the manufacturing process and product of a laminated composite part according to an embodiment of the present invention.

Referring to FIG. 1, a wide sheet-like substrate is prepared for manufacturing the laminated composite component of the present invention. This sheet is made of a material such as polyethylene terephthalate. On the sheet 1, a large number of composite parts are simultaneously printed or stacked in parallel as described below to create a series of multiple composite parts as shown in Figure B, and finally the partition lines 1, m (imaginary) to form a single composite part. According to this method, the process can be simplified and streamlined, and mass production can be achieved. For ease of explanation, the following description will refer to the manufacture of a single part, but it should be understood that in practice many parts are simultaneously printed or laminated in parallel. In the following description, references to "printing" should be understood to include a subsequent drying step, and references to "superposition" should be understood to mean preformed sheet-like layers are superimposed. Second
The figure shows the magnetic material 2 printed or superimposed on the base sheet 1 in one portion divided by A and b in FIG.

An inductor conductor 3 is printed on the upper half of the surface of the magnetic body 2. The inductor conductor 3 is composed of a plurality of diagonally running parallel conductors, and input terminals 4 and output terminals 5 exposed to the sides of the laminate are simultaneously printed on both left and right ends of the conductors. Next, as shown in FIG. 3, a damper material 6 is printed on the lower half of the surface of the magnetic body 2. Next, the process moves to the step shown in FIG. 4, and the capacitor electrode 7 is printed. In the illustrated example, the electrodes 7 are printed in the form of three island-like areas. At the same time, conductors A, b, and c for connecting the electrode 7 to a predetermined location of the inductor conductor 3 (or the terminals 4 and 5) are printed. As shown in FIG. 5, a magnetic material 8 (electrically insulating material) is printed in a long thin strip on the inductor conductor 3. At this time, the magnetic material 8 is printed so that the upper and lower ends of the conductor 3 are exposed from the magnetic material 8. Next, as shown in FIG. 6, an inductor conductor 9 consisting of a plurality of parallel conductors is printed on the magnetic material 8. The inductor conductor 9 is arranged such that its upper and lower ends overlap the upper and lower ends of the lower inductor conductor 3, and both the inductor conductors 3 and 9 collectively form a coil pattern that goes around the magnetic body 8. Use one with a pattern. In this way, the magnetic bodies 2, 8 and the inductor conductors 3, 9
can constitute a closed magnetic circuit inductor as a whole. Moving to the step shown in FIG. 7, the dielectric material 10 is printed so as to completely cover the capacitor electrode 7. Moving to FIG. 8, another capacitor electrode 11 is printed on the dielectric 10. The condenser electrode 11 is a single electrode that faces all of the electrodes 7. At the same time, connection terminals d exposed on the lower side of the laminate are printed. Conductors 7, 11 and dielectric 1
0 can provide a total of three parallel capacitors. Finally, as shown in FIG. 9, a damper material 12 is printed or overlapped to cover the upper surface of the laminate. As shown in Fig. 1, the laminate thus formed is actually in the form of a large number of connected elements, so use an appropriate cutter to cut the laminate along lines A and bK. The substrate 1 is peeled off and cut into individual laminates (alternatively, it can be cut after firing). FIG. 10 is an external view of the cut laminate (developed using a triangular projection), and the terminals 5, 6, and d are exposed on the right, left, and bottom sides. After the above steps are completed, the laminate is placed in a suitable firing furnace and fired at a predetermined temperature.
Next, a large number of laminates are supported on a suitable jig, and terminals 4 and 5 are attached.
, d, respectively. The external terminal may be made of silver paste or the like.
FIG. 11 shows a perspective view of the laminated composite part of the present invention completed through the above steps. With the configuration of the present invention, the manufacturing process is simplified, the process is stabilized by the use of the damper material, and a laminated composite part with good characteristics can be produced.

In addition, since all of the steps can be carried out by the printing method or a combination of the printing method and the superposition method, the efficiency of the steps and mass production can be achieved. Furthermore, the completed laminated composite part is a small component with a monolithic structure, is mechanically strong, easy to handle, and can be easily automated for soldering. Further, as shown in FIG. 11, the composite component of the present invention has external terminals 13 and 14.
, 15 to form a conductive pattern 1 on a printed circuit board 16.
It is possible to solder directly to 7, 18, 19,
It is also advantageous from this point of view. An equivalent circuit diagram of the laminated composite component of the present invention is shown in FIG.

Having thus described a preferred embodiment of the invention, it will be apparent to those skilled in the art that many other variations are possible.

[Brief explanation of the drawing]

1 to 9 show the sequential steps of manufacturing the laminated composite part of the present invention, with the left side being a plan view and the right side being an end view. FIG. 10 is an external view of the manufactured laminate. FIG. 11 is a perspective view showing the completed laminated composite component of the present invention and the state in which it is attached to a printed circuit board. FIG. 12 is an equivalent circuit diagram of the laminated composite component of the present invention. In the figure, the main symbols are as follows. 298...magnetic material, 3,9...conductor for inductor, 7,11...conductor for capacitor! !
L. 6, l2... Damper material, 10...
Dielectric, 4, 5, d...terminal.

Claims (1)

[Scope of Claims] 1. At least one inductor is formed on a part of the magnetic thin plate, and a damper having a shrinkage ratio suitable for co-firing with the magnetic thin plate is formed on another part of the magnetic thin plate. A chip-shaped laminated composite component comprising at least one capacitor made of a laminated body of material layers and electrodes, and characterized in that it is an integral sintered body. 2. The laminated composite component according to item 1, wherein the inductor has a lead-out end to both end surfaces of the laminated composite component, and the capacitor has a lead-out end to a side surface of the laminated composite component. 3. The laminated composite component according to item 1 or 2, wherein the damper material is selected from glass, alumina, and a ferrite-dielectric mixture.