JPH0519289B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chip-type composite electronic component having a composite inductance and a capacitor.

Electronic components are increasingly becoming more complex and smaller, but in the case of capacitors and inductors, dielectric and magnetic materials are used, and these are made using different methods, making it difficult to combine them. It was hot.

The present invention applies essentially the same type of lamination method to the production of capacitors and inductors, and separately prepares a sintered dielectric sheet and a sintered magnetic sheet having a large number of capacitors and inductors, respectively.
These are stacked in a certain relationship, baked at a predetermined relatively low baking temperature to combine, and then cut into unit sizes, making it possible to manufacture small composite LC parts in large quantities. Each sheet is made by forming magnetic powder such as ferrite or dielectric powder such as BaTiO ₃ or TiO ₂ into a page with an appropriate binder, forming a layer by printing or rolling, and adding Ag-Pd,
It can be obtained by printing and laminating alternately a paste of metal powder such as Pd as a coil pattern or capacitor electrode pattern using a printing method. Magnetic materials and dielectric materials generally have different shrinkage rates during firing, so if the above-mentioned magnetic sheets and dielectric sheets are piled up and fired, it may cause harmful effects such as warping, cracking, development of internal stress, and deterioration due to firing distortion. Therefore, in the present invention, these sheets are fired separately to avoid such firing distortion, cracking, deterioration, etc. Firing also has the advantage of being able to be performed under optimal conditions for magnetic sheets and dielectric sheets. Next, the fired magnetic sheet and dielectric sheet are bonded together at a relatively low temperature by interposing a sinterable adhesive such as a glass paste layer so that their conductive patterns are in a certain overlapping relationship. It is burned with

According to the method of the present invention, composite LC elements can be mass-produced, and since both the inductor and capacitor parts can be manufactured using the same type of technology, process control is easy and high quality products can be obtained.

The method of the invention will now be explained in detail with reference to examples.

In the method of the present invention, as shown in FIG. 1, a magnetic sheet 1 having a large number of coiled conductor patterns 2 arranged in a coordinate pattern and these coiled conductor patterns are used to form a large number of inductance elements or transformer elements. A dielectric sheet 2 having a capacitor electrode pattern 4 at a position corresponding to the pattern 2 is used.

Among these, the magnetic sheet 1 is made by printing a large number of semicircular coil patterns on a magnetic layer, leaving only one end of the coil pattern exposed and masking the other part with a similar magnetic layer, and then A semicircular coil pattern to be connected to the end is printed, and the magnetic sheet 1 is repeatedly laminated in the same manner to obtain a magnetic sheet 1 having a desired coil pattern, and then fired at a predetermined high temperature to form a sintered body.

Further, the dielectric sheet 3 is prepared by printing a large number of electrode patterns for capacitors arranged in a coordinate manner on the dielectric layer, and then superimposing or printing other similar dielectric layers, and thereafter forming predetermined patterns in the same manner. The dielectric sheet 3 is made up of the number of laminated layers, and is then fired at a predetermined high temperature to form a sintered body.

As shown in FIG. 3, the fired magnetic sheet 1 and dielectric sheet 3 are superimposed so that their conductive patterns are in a predetermined vertical alignment relationship.
At this time, an intermediate layer 5 of glass paste is interposed as an adhesive, and appropriate pressure is applied to combine them. This superimposed body is then heated to a relatively low temperature to melt the glass and completely combine the magnetic layer and dielectric layer into an integral plate. The firing temperature of glass has no effect on the properties of magnetic or dielectric materials such as ferrite or barium titanate. Next, as shown in FIG. 4, by cutting this superimposed body along lines 6 and 7, a unit fired composite body 8 is obtained. Alternatively, if the magnetic sheet 1 and/or the dielectric sheet 3 are cut along lines 6 and 7 in the pre-firing stage shown in FIGS. 1 and 2, the superimposed body can be Just fold it along the line. Since the lead-out conductors of the electrode pattern and coil pattern are exposed on the cut surface of the composite body manufactured in this way, conductive paste (Ag, Cu, etc., which can be baked at a relatively low temperature) is connected to the lead-out part of the electrode pattern and coil pattern. A metal powder paste) is baked to form external terminals 9 and 10 as shown in Fig. 5, thereby obtaining a small chip-shaped LC composite part as a whole.

As an example, the lead conductors of the inductance part and the capacitor part are connected in parallel (the connection is made using external terminals 9 and 10 as shown in Fig. 5), and
LC trap is completed.

Figure 7 shows a dielectric sheet 1 obtained by printing a coil pattern capable of forming a transformer in each unit area, and a dielectric sheet 1 obtained by printing electrodes forming three capacitors in each unit area. 3 is a circuit diagram of an intermediate frequency transformer obtained by using the body sheet 3. FIG. Furthermore, it will be easily understood that it is also possible to configure a delay line as shown in FIG.

As described above, according to the method of the present invention, it has become possible to mass-produce LC composite parts with little mechanical distortion and therefore with a low defective rate.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a magnetic sheet used in the method of the present invention, FIG. 2 is a plan view of a dielectric sheet used in the method of the present invention, FIG. 3 is a front view showing an intermediate step of the present invention, and FIG. 4 5 is a perspective view of a completed LC composite component, FIG. 6 is a circuit diagram of the composite component, and FIG. 7 is a circuit diagram showing another example. and FIG. 8 are circuit diagrams showing still another example. The main parts in the figure are as follows. DESCRIPTION OF SYMBOLS 1... Magnetic sheet, 2... Coil conductor pattern, 3... Dielectric sheet, 4... Capacitor electrode pattern, 5... Intermediate buffer layer, 8... Unit superimposed body, 9, 10... External terminal.

Claims (1)

[Claims] 1. A magnetic sheet in which a plurality of inductances are arranged in a magnetic body and a dielectric sheet in which a plurality of capacitors are arranged in a dielectric body so as to have a constant alignment relationship with the inductances are fired separately at respective predetermined firing temperatures. The sheets are then overlapped and combined with a bakeable intermediate layer such as glass, baked at a predetermined relatively low baking temperature to combine these sheets, cut into individual units, and formed with an inductance lead-out end exposed on the side surface of the unit body. A method for producing a solid composite component comprising baking a predetermined external terminal on a capacitor lead-out end.