JPH0115159Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an LC composite component, particularly a laminated type LC composite component.

Laminated LC composite parts have been proposed in Utility Application No. 55-93581, etc. Figure 1 shows a conventional laminated LC composite component, including magnetic layers 1, 2, 3, dielectric layers 4, 5, 6, interconnecting conductor layers 7, 8, 9 for forming a coil, and electrodes for forming a capacitor. layers 10, 11
are laminated by printing etc. from bottom to top and sintered as one piece,
As shown in FIG. 2, external terminals 12, 13, 14, and 15 are formed on the lead-out portions of the conductors and electrodes.
However, in conventional LC composite parts, problems often occurred with electrical connections at the conductor lead-out portions.
In other words, the fired laminated LC composite part consists of a raw dielectric layer and a magnetic layer made from a paste made of dielectric or magnetic (insulating) powder and a binder, and a raw dielectric layer and magnetic layer made from a paste made of dielectric or magnetic (insulating) powder and a binder, and a layer made of a material such as Ag or Ag-Pd. Raw electrode layers and conductors made from a paste consisting of metal powder and binder are laminated in an appropriate order as shown in Figure 1, and fired to form an integrated electronic component as shown in Figure 2. However, poor connections may occur due to differences in the degree of shrinkage during firing between the dielectric or magnetic material and the electrode, coil conductor, or lead-out conductor, as well as the small exposed area to the outer periphery of the component. In particular, the reliability of the connection at the LC-to-LC connection section was sometimes impaired.

The present invention solves this problem with a drawer that does not have such drawbacks.

1 to 15 show the manufacturing process of the LC composite part of the present invention. In the following description, the dielectric layer is assumed to consist of a green (unfired) dielectric sheet, which is later fired to become part of the finished product. This sheet is
A paste made by kneading powders such as BeTiO ₃ and TiO ₂ with a binder such as methylcellulose and butyral resin is formed into a sheet by printing or rolling. Note that this sheet is not limited to dielectric materials such as BaTiO ₃ , but also uses magnetic materials such as ferrite, which is used for the coils shown below, and utilizes the dielectric constant (10 to 30) of the magnetic material itself. Good too. In addition, if magnetic materials are used for both the capacitor and coil parts,
It has the advantage that problems such as warping and cracking do not occur during simultaneous firing. In the following description, it is assumed that the magnetic layer is composed of a raw magnetic sheet, which is later fired to become part of the finished product. This sheet is made of methylcellulose, insulating ferrite magnetic powder,
It is made into a sheet by printing or rolling a paste kneaded with a binder such as butyral resin. In the following explanation, it is assumed that capacitor electrodes and coil conductors are formed by making a paste of heat-resistant metal powder such as Ag, Ag-Pd, etc., and printing it in a predetermined pattern, which is later combined with other parts. It will be fired and become part of the finished product.

First, a dielectric layer 1 is formed as shown in FIG. In reality, a large number of parts are manufactured at the same time in parallel, or each dielectric layer and magnetic layer has a wide area and is later cut to a predetermined size. The upper single part will be explained. Next, as shown in FIG. 4, the electrodes 2 are printed on the dielectric layer 1 so that the upper and lower sides A and A' of the electrodes 2 are exposed on the upper and lower sides of the dielectric layer 1. A dielectric layer 3 is laminated or printed on the entire surface as shown in FIG. 5, and an electrode 4 having a lead-out portion B exposed on the right side of the laminate is printed thereon as shown in FIG.
Next, a dielectric material 5 is laminated or printed thereon to complete the lamination of the capacitor section.

Next, a magnetic layer 6 is laminated or printed on the capacitor part as shown in FIG. C' is pulled out to the upper and lower sides of the stack.
Moving on to the process shown in Figure 0, the magnetic layer 8 is laminated or printed on the right side, leaving one end of the conductor 7 exposed at this time. Next, print an elongated L-shaped conductor 9 to be connected to the conductor 7 as shown in FIG. 11, laminate or print a magnetic layer 10 as shown in FIG. 12, and then connect to the conductor 9 as shown in FIG. An L-shaped conductor 11 is printed, and its end is drawn out to the left side of the laminate as a wide drawer part D. Finally, as shown in FIG. 10, the magnetic material 12 is printed on the entire surface to complete the lamination. Next, this laminate is fired at a predetermined temperature to form an integral fired laminate. External terminals 13, 14, 15, and 15' are baked on the left, right, and upper sides of the laminate thus obtained to complete the LC composite component of the present invention. The terminals 14 and 15, 15' are connected to the lead-out portions B and A of the electrodes 4 and 2.
Since they are each connected to A', a capacitance is formed between them. Further, since the terminals 15 and 15' connect the lead-out portions A and A' to C and C', the electrode 2 of the capacitor is connected to one end of the coil. Further, both ends of the coil are connected between the terminals 13 and 15, 15'. Therefore, the circuits shown in FIGS. 16 and 17 are the circuit configurations of the LC composite component of this example. The former can be applied to trap circuits, and the latter can be applied to filter circuits.

As can be seen from the above embodiments, the sintered laminated LC composite part of the present invention has a double exposed drawer at least at the LC connection part, so that a reliable connection is achieved. Further, if necessary, other capacitor electrodes and inductor lead-out portions may also be configured in duplicate to achieve even more reliable connection.

[Brief explanation of the drawing]

An exploded perspective view of the conventional laminated LC composite part shown in Figure 1;
FIG. 2 is a perspective view of the same component, FIGS. 3 to 15 are plan views showing the sequential steps of a laminated LC composite component according to an embodiment of the present invention, and FIGS. 16 and 17 are circuit diagrams of the same component. The main parts in the figure are as follows. 1, 3, 5:
Dielectric layer, 2, 4: Capacitor electrode, 6, 8, 1
0, 12: Magnetic layer, 7, 9, 11: Coil forming conductor, A, A', B, C, C', D: Drawer part, 1
3, 14, 15, 15': External terminals.

Claims (1)

[Scope of utility model registration request] In a laminated LC composite part in which an electrical insulating layer, a capacitor electrode, and a coil forming conductor are laminated in a predetermined order and sintered together, one of the capacitor electrode and the coil forming conductor is drawn out to the periphery of the composite part. An LC composite part characterized in that at least one of the exposed parts is pulled out in two places.