JPS60140804A - Laminated electronic part - Google Patents

Abstract

PURPOSE:To obtain a laminated inductor section, which has high inductance and can be used even at a high temperature, by constituting the inductor section by an amorphous magnetic material section, an insulator section insulating the magnetic material section and a coil pattern-shaped conductor formed to the insulator section. CONSTITUTION:A thin-layer-shaped magnetic amorphous section 1 is positioned at the center, and ferrite sections 2, 3 having high electric resistance are formed to the upper and lower sides of the magnetic amorphous section 1. A ferrite section 4, the center thereof is bored, is shaped similarly. Conductor paste is printed on the ferrite section 4 only by a half turn section, and one end of the paste is drawn out to a lower side. An amorphous section 6 is inserted so as to bury the center of the ferrite section 4, a ferrite section 7 is shaped, and a conductor 8 corresponding to a half turn is connected to a conductor 5 and printed on the ferrite section 7. Likewise, the magnetic amorphous sections and the ferrite sections are laminated only by required number, a ferrite section 9 and a conductor 10 are printed and the conductor is drawn out to an upper side, a ferrite section 11 is printed for insulation, an amorphous section 12 and ferrite sections 13, 14 are formed, and lastly external terminals 15, 16 are formed while coating the side surface of the laminate.

Description

[Detailed description of the invention] The present invention relates to a laminated electronic component including an inductor.

[Prior art and its problems]

Conventionally, the present inventors have proposed various laminated electronic components in which inductor portions are manufactured by a lamination method. Generally speaking, the inductor section is made of a magnetic layer using ferrite powder with high magnetic permeability, which is alternately laminated with conductor patterns to form a laminate, and then sintered to form an integrated inductor section. However, magnetic ferrite generally has a low Curie point, and when used in a relatively high-temperature environment, the designed characteristics or desired characteristics may not be obtained. Furthermore, magnetic ferrite cannot always have a sufficiently high magnetic permeability, making it unsatisfactory for some applications.

[Purpose of the invention]

An object of the present invention is to provide a multilayer electronic component including a multilayer inductor section that has high inductance and can be used even at high temperatures.

[Summary of the invention]

The laminated electronic component of the present invention has an amorphous magnetic layer, an insulating layer for the amorphous magnetic layer, and a conductor of approximately one turn formed on each surface of the insulating layer, and these half turns of the conductor are formed on the insulating layer. The laminates are alternately laminated so as to be connected to each other at the edges, and if necessary, large-area external terminals are formed as lead-out terminals on the sides of the laminate.

Since the present invention uses an amorphous magnetic material to construct a laminated inductor portion, it is possible to provide an electronic component that can function particularly at high temperatures by utilizing the high magnetic permeability and heat resistance of the amorphous magnetic material.

[Explanation of specific examples]

In the present invention, an amorphous magnetic material is used. This magnetic material is a magnetic alloy, and has the property of recrystallizing when heat treated at about 500 to 800°C. However, if used at a temperature lower than the recrystallization temperature, the Curie temperature is sufficiently high (some are about 500°C), so it has sufficient magnetism even at relatively high temperatures, and also has high magnetic permeability.

Therefore, the electronic component of the present invention is particularly suitable for use at high temperatures. The amorphous magnetic material is prepared in the form of a thin layer and punched into a predetermined shape.

Since the amorphous magnetic material is a conductor, its surface is insulated by coating it with an extremely thin film of glass, ceramic, or the like.

Embodiment 1 FIGS. 1 to 9 are diagrams illustrating an electronic component made of a laminated inductor and a manufacturing method thereof according to an embodiment of the present invention. As shown in FIG. 1, first, a thin layered magnetic amorphous portion 1 is placed in the center, and ferrite portions 2.6 made of ferrite powder paste having high electrical resistance are formed on the upper and lower sides by printing, or ferrite sheets are adhered. As shown in FIG. 2, a bright, high electrical resistance ferrite section 4 in the center is printed or glued in the same manner. As shown in FIG. 3, conductive paste is printed on the ferrite part 4 by a half-turn in an approximately L shape, and one end of the paste is drawn out to the bottom side. Furthermore, the amorphous part 6 is inserted so as to be buried in the center of the ferrite part 4. As shown in FIG. 4, the ferrite portion 7 is printed or glued, and on top of that, as shown in FIG. 5, approximately half a turn of the conductor 8 is connected to the conductor 5 and printed. Thereafter, the required number of ferrite parts, amorphous magnetic materials, and conductors are laminated in the same manner, and then the sixth layer is laminated.
As shown in the figure, print the ferrite part 9 and conductor 10, pull out the conductor on the upper side, and use the ferrite part 1 for insulation as shown in Figure 7.
1, and then print the amorphous part 1 as shown in Figure 8.
2. Ferrite parts 13 and 14 are formed, and finally external terminals 15 and 16 are formed to cover the side surfaces of the stack as shown in FIG. As a result, a laminated inductor having the appearance shown in FIG. 10 is obtained.

Since the laminated inductor configured as described above uses an amorphous magnetic alloy in the central portion, it can maintain high magnetic permeability up to high temperatures where high magnetic permeability is achieved.

Therefore, it was possible to provide an electronic component having an inductor portion that can be used at higher temperatures than when using a conventional ferrite type magnetic material.

The multilayer electronic component of the present invention only needs to have an inductor section using an amorphous magnetic material, and may include a multilayer inductor with only one inductor section, a multilayer transformer with two built-in inductor sections, a multilayer capacitor, and a resistor. It can be applied to various electronic components such as intermediate frequency transformers, traps, integrated circuits, and antenna coils. In addition, the high Curie point of amorphous magnetic material can be used for applications such as coils for sensing the temperature of automobile oil.

Example 2 11 to 22 show other embodiments of the invention.

In this example, an amorphous portion is used in which the surface of the amorphous magnetic thin layer including the periphery is coated with a thin low-melting glass, and the term amorphous portion should be understood to mean this.

In FIG. 11, a rectangular amorphous portion 21 is prepared. On top of that, a conductor 22 made of a single paste having a starting point S at the end is formed by printing as shown in FIG. 2, and on top of that a rather small amorphous portion 2! Stack +. For this purpose, temporary attachment may be performed using glass paste, and at this time, the ends of the conductors 22 are exposed. As shown in Figure 14, conductor 24 for another half turn (25 is the overlapping part)
is printed, and the amorphous section 26 (15th section) is printed in the same manner.
Figure) Half-turn conductor 27 (Figure 16) (28 is the overlapping part), amorphous part 29 (Figure 17), half-turn conductor 30 (Figure 18) (31 is the overlapping part), amorphous part 62 (Fig. 19) A half-turn conductor 33 (Fig. 20) whose end is below the lead-out end, and an amorphous part 34 (21
form). Finally, as shown in Figure 22, the external terminal 35
．． 36 is formed from conductive paste. Next, the integrated laminated inductor is completed by heat treating the entire structure at the melting temperature of the glass and the recrystallization temperature of the amorphous magnetic material.

Example 3 In Example 2, a multilayer capacitor is formed following the process shown in FIG. 21, and predetermined external terminals are attached to produce an LC composite component.

Embodiment 4 In Embodiment 2, a transformer can be formed by repeating the same steps following the steps shown in FIG. 21 and attaching predetermined external terminals.

As described above, according to the present invention, it is possible to provide an electronic component including at least one inductor section using an amorphous magnetic material, and the inductance of the inductor section can be increased or the inductor section can be operated at high temperatures. As a result, the range of applications for electronic components can be significantly expanded.

[Brief explanation of the drawing]

1 to 9 show the manufacturing process and structure of an electronic component according to an embodiment of the present invention, in which (a) is a plan view, (b) is a sectional view, and FIG. 10 is a perspective view of the electronic component, 11 to 22 are plan views showing the manufacturing process and structure of an electronic component according to another embodiment of the present invention. The upper part of the figure is as follows. 1.6.12: Amorphous part 2.3.4.7.9.11.14.15: Ferrite part 5.8.10: Conductor 15.16: External terminal 21.23.26.29.32.64 : Amorphous part 22.24, 27.60.35: Conductor 35.36: External terminal

Claims (2)

[Claims] (1) In an electronic component having at least one inductor portion, the inductor portion includes an amorphous magnetic material portion, an insulator portion that insulates the magnetomotive material portion, and a coil pattern-shaped conductor formed in the insulator portion. and laminated electronic components. (2) The amorphous magnetic material part is a thin layer, the insulator part is a thin layer formed on the amorphous magnetic material part, and the coil pattern conductor is a conductor of approximately one hand turn formed on the insulator part. 2. The laminated electronic component according to claim 1, furthermore, the laminated electronic component is connected to another approximately one-turn conductor on another insulator layer via the edge of the insulator portion.