JPS58145114A - Lc composite part - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to LC composite parts.

Conventionally, various LC composite parts have been proposed that have a monolithic structure by combining L (coil) and C (capacitor).

Among them, Jitsugan No. 1983-103920 and Jitsugan No. 1982-1
No. 2300, etc., uses printing technology to alternately print and laminate magnetic layers and coil-forming conductors to create coil parts.
It is disclosed that dielectric layers and conductors for forming electrodes are alternately printed and laminated on this laminate or separately, and the laminate for a coil and the laminate for a capacitor are fired at a high temperature in a superimposed state. ing. One example is as shown in Fig. 1, where a paste of dielectric powder such as T to, BaTio, etc. is printed on a suitable releasable substrate (not shown).
A dielectric layer 1 is formed by printing on top, and Ag, Ag
- A paste of metal powder such as Pd or Pd is printed on layer 1 by a printing method to form electrode layer 2, and dielectric layer 3 is printed on top of it. ), another electrode layer 4 is formed thereon, an intermediate layer 5 made of a paste of glass powder or a ferrite-dielectric powder mixture is entirely printed, and a magnetic material made of a paste of permeable magnetic ferrite powder is formed thereon. Print the layer 6, then print the recoil forming conductor 7 using a powder paste similar to the metal powder described above, print the magnetic layer 8 that masks a part of the conductor 7, and then connect the four bodies 7. Then, the magnetic layer 10, the conductor 11, the magnetic layer 12, the conductor 16, the magnetic layer 14, and the conductor 15 are printed in the same way, and finally the magnetic layer 16 is laminated. The thus obtained laminate is fired at a high temperature to convert it into an integral sintered body, and as shown in FIG. 2, suitable external terminals (such as silver paste) are baked on the exposed ends of the conductor at both ends to form a finished product. It is clear that the equivalent circuit will be as shown in FIG.

Composite parts with the structure described above are mechanically strong (and small, and because of their simple shape, it is easy to attach them directly to a printed circuit board, and this work can be automated. Although it has the advantage of being suitable for mass production because it can be manufactured by simultaneous printing, there is heat shrinkage of the L and C parts during firing, so even if an intermediate layer is used, there will be distortion and cracking due to thermal stress, and the characteristics will deteriorate. Due to fluctuations, it was difficult to select an intermediate no.

Composite parts with a circuit configuration as shown in Figure 3 have a frequency of 80~
When used for traps, etc. in the 110 MH2 band, it is sufficient to be able to output 1 H or less in L. We found that it can be fully realized even if

Therefore, the present invention provides a nine-layer LC composite part in which all the insulator layers (both the L part and the C part) are made of the same sinterable non-magnetic material, thereby reducing the thermal stress during firing. It is intended to solve the various problems caused by this.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 4 is a perspective view showing the method for manufacturing a laminated LC composite part of the present invention, and also shows the structure of the LC composite part. In the present invention, all insulator layers are made from the same composite material, such as powder of glass-based ceramic or ordinary sintered ceramic material, combined with a suitable binder (one that can be gasified during firing) and a binder. bath additives and rc
It is formed by a printing method using the kneaded paste. As the printing method, a screen printing method or the like can be used. In addition, for the conductor portion (conductor for coil formation and conductor for electrode formation), the metal powder base 7 mentioned above can be used. It should be understood that several LC composite parts are actually printed in parallel.Referring to Fig. 4, 21 is a suitable releasable sheet. This is an insulating layer formed by printing an insulating paste on the surface of the insulating layer 21. On top of this, an electrode layer 22 is printed with conductive paste, and at this time, one end T is exposed to the left side of the insulating layer 21. Print the same insulator paste on top of that to create insulator layer 2.
3 is formed, and furthermore, an electrode layer 24 having an end T exposed on the right side of the laminate is printed thereon. Note that although each insulating layer is shown separate from each other in the figure, in reality each layer would be printed sequentially on top of the layer directly below it.

If desired, the above printing steps are performed until the required number of products is obtained.

Next, an insulator layer 26 is further printed on the laminate, and a hook-shaped linear conductor 27 for forming a coil is entirely printed thereon. At this time, the terminal end T of the conductor 27 is exposed on the left side of the laminate. Next, print the insulator layer 28 to the left side of the laminate so that it does not cover the opposite end of the conductor 270, and print the linear conductor 29 on top of it so that the end overlaps with the end of the conductor 27. do. The dotted lines in the figure schematically indicate that they are interconnected. Thereafter, the insulating layer 50, the linear conductor 31, the insulating layer 32, and the linear conductor 35 are sequentially printed and formed in the same manner. This step can be repeated until the desired number of layers is obtained. An insulator layer 54 is further printed on the laminate, and a conductor is drawn out to the right end T of the laminate by printing a linear conductor 65.

Finally, an insulator layer 56 serving as a surface layer is printed to complete the lamination process.

The laminate manufactured as described above is charged into a firing furnace and fired at a prescribed high temperature for a prescribed time'! *The layered body is made into an integral sintered body, and if necessary, additional heat treatment is performed to adjust the properties. External terminals 37.5B are baked on the thus obtained sintered body as shown in FIG. 5, and the ends of the conductor portions T1, T!
,'r, ,'r, are drawn out to the outer surface of the sintered body. It is clear that the LCQ assembly thus completed has the circuit configuration shown in FIG.

Alternatively, the partial y of the capacitor and coil sections,
It is also possible to manufacture the # body separately, press these two parts together to make them adhere to each other, and then fire them. In this case, several types of partial laminates can be prepared and various combinations can be used to obtain many types of laminated LC composite parts.

As mentioned above, since all the insulating layers of the LC composite part of the present invention are manufactured from the same material, the process is significantly simplified, and thermal stress during firing is suppressed to a minimum, preventing distortion, cracking, and internal stress. Troubles such as fluctuations are avoided, and LC composite parts of excellent quality can be provided.

[Brief explanation of drawings]

Is Figure 1 a conventional LC? A perspective view showing an example of manufacturing a J joint part. Figure 2 is a longitudinal sectional view of the part, Figure 3 is a circuit diagram of the part,
FIG. 4 is a perspective view showing an example of manufacturing a C composite part according to the present invention, FIG. 5 is a longitudinal sectional view of an LC component according to the present invention, and FIG. 6 is a circuit configuration diagram of the same component. The upper part of the figure is as follows. 21.23.26.28.50, 32.34.36: Insulator layer 22.24: Electrode layer 27.29.61.33.35: Name of conductor agent for coil Motohiro Kurauchi □□1 ．． Nodo Kurahashi Aki 1-chome 3

Claims (2)

[Claims] (1) Non-magnetic insulator layers and capacitor electrode conductors are alternately laminated, non-magnetic insulator layers and coil conductors made of the same material are alternately laminated, and these are integrally fired to form electrode conductors and capacitors on the outside. Sintered LC composite part with external terminals for the coil conductor. (2) The LC composite component according to item 1 above, wherein the nonmagnetic insulator is a glass ceramic.