JPH04280615A - Manufacture of laminated body - Google Patents

Abstract

PURPOSE:To obtain a laminated body manufacturing method with which whether the desired laminated body is formed or not can be judged easily without wastefully using time and labor. CONSTITUTION:At least a position confirming film (position confirming electrode 17), which is exposed to the edge face corresponding to the position of the above-mentioned second conductive material film, is arranged on the same layer of the second conductive material film (inner electrode 12) which is not exposed to the edge face, and first conductive material films (inner electrodes 11a and 11b), which are exposed to the edge face together with the above- mentioned film, are alternately laminated through the intermediary of a sheet (dielectric layer 13) having insulating property and plasticity, and a laminated body is formed. As the position of the second conductive material film can be realized by visually recognizing the position confirming film exposed to the edge face, whether the desired laminated body is formed or not can be judged easily without wasting time and labor and the like.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a laminate used for electronic components such as a multilayer ceramic capacitor.

0002

2. Description of the Related Art Conventionally, when producing a low-capacitance ceramic capacitor, in order to reduce errors in capacitance, capacitors connected in series are integrated as shown in FIGS. 2 and 3. Internal electrodes are placed on the end face of the capacitor body so that they are not exposed. That is, FIG. 2 is a side sectional view of the capacitor, and FIG. 3 is a plan sectional view taken along the line A-A in FIG.
(hereinafter referred to as the main body), and has a rectangular parallelepiped shape.

The main body 10 also includes a plurality of internal electrodes 11a,
11b, 12 and a dielectric layer 13 are stacked, and the internal electrode 11a is led out to one end in the longitudinal direction of the main body 10, and the internal electrode 11b is led out to the other end. Internal electrode 11
a and the internal electrode 11b are arranged in the same layer, and the main body 1
The internal electrode 11a and the internal electrode 11b are insulated by a dielectric layer 13 at the center in the longitudinal direction. The internal electrodes 12 are connected to internal electrodes 11a and 11a with a dielectric layer 13 interposed therebetween.
It is laminated on the layer 11b. Further, the internal electrode 12 is arranged at the center of the main body 10 so as not to be exposed to the end surface of the main body 10, and one longitudinal end thereof is connected to the internal electrode 12.
a, and the other end thereof is arranged to overlap the internal electrode 11b.

Further, external electrodes 14 are formed at both ends of the main body 10 and are electrically connected to the internal electrodes 11a and 11b, so that the main body 10 can be connected to an external circuit via the external electrodes 14.

According to the capacitor having the above-mentioned configuration,
The internal electrode 11a and the internal electrode 12 constitute a capacitor with a capacitance C1, and the internal electrode 11b and the internal electrode 12 constitute a capacitor with a capacitance C1.
A capacitor with capacitance C2 is constructed by: These capacitors are connected in series and are integrated, and the capacitance C thereof is smaller than the individual capacitances C1 and C2.

Next, a method for manufacturing the above-mentioned capacitor will be explained. A plastic green sheet made of BaTiO3-based dielectric material is coated with silver-palladium-based conductive paint.
A plurality of sheets with internal electrodes 11a and 11b arranged in a matrix are created by screen printing slots. Further, palladium-based conductive paste is screen printed on the green sheet to produce a plurality of sheets having internal electrodes 12 arranged in a matrix corresponding to the internal electrodes 11a and 11b. At this time, as described above, the internal electrodes 11a and 11b are led out from both ends of the main body 10, and the internal electrode 12 is arranged at the center of the main body 10.

[0007]Furthermore, these are laminated to form an integral body, green sheets 15 are stacked on top and bottom, and pressure is applied in the direction of the layers to bond them, and then cut to match the shape of the main body 10 described above, and the binder is removed. Perform processing. After that, it is fired at a predetermined temperature. Thereby, the main body 10 is obtained. moreover,
A capacitor is formed by forming external electrodes 14 from a silver-palladium-based conductive material at both ends of the main body 10 and applying solder plating thereon.

[0008]

However, in the conventional manufacturing method described above, the internal electrodes 11a, 11b
, 12 and the dielectric layer 13 are laminated and pressurized, as shown in FIG.
As shown in FIG. 2, the internal electrode 12 may be shifted in the width direction of the main body 10 and may not overlap with the internal electrodes 11a and 11b at a predetermined position.

[0009] Therefore, the capacitance error exceeds the specified value, resulting in defective products. Furthermore, whether it is a defective product or not,
After forming the external electrode 14 on the main body 10, it cannot be determined unless this capacitance is measured, so the time required for production,
There was a problem that labor etc. were wasted.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a method for manufacturing a laminate that can easily determine whether or not a desired laminate has been formed without wasting time and labor. It is about providing.

[0011]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a structure in which a first conductive material exposed on an end face is interposed between a sheet having insulating properties and plasticity. In a method for manufacturing a laminate in which a laminate is formed by alternately laminating films and second conductive material films that are not exposed on the end faces, and then applying pressure in the layer direction, during the lamination, the second conductive material film is A method for manufacturing a laminate, in which a position confirmation film exposed on an end surface corresponding to the position of the second conductive material film is arranged in the same layer as the film, with a space between the second conductive material film and the second conductive material film. suggest.

According to a second aspect of the present invention, in the method of manufacturing a laminate according to the first aspect, the position confirmation film is made of the same conductive material film as the second conductive material film. propose.

[0013]

[Function] According to claim 1 of the present invention, during lamination, a position confirmation film is provided on the same layer as the second conductive material film and exposed on the end surface corresponding to the position of the second conductive material film. , and are spaced apart from the second conductive material film. As a result, when the first and second conductive material films, the position confirmation film, and the dielectric layer are laminated and then pressurized in the layer direction, the second
When the position of the conductive material film shifts, the position confirmation film shifts accordingly. Therefore, the position of the second conductive material film can be known by visually checking the position confirmation film exposed on the end face.

According to a second aspect of the present invention, since the position confirmation film is made of the same conductive material film as the second conductive material film, the position confirmation film is made of the same conductive material film as the second conductive material film. A film can be formed.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side cross-sectional view of a low-capacity ceramic capacitor to which the present invention is applied, and FIG. 6 is a plan cross-sectional view taken along the line B--B in FIG. In the figures, the same components as those of the conventional example described above are indicated by the same reference numerals. That is, 1
0 is a capacitor main body (hereinafter referred to as main body), which has a rectangular parallelepiped shape and is formed by laminating a plurality of internal electrodes 11a, 11b, 12, a position confirmation electrode 17, and a dielectric layer 13.

The internal electrode 11a is led out to one end in the longitudinal direction of the main body 10, and the internal electrode 11b is led out to the other end. Further, the internal electrodes 11a and 11b are arranged as a pair on the same layer, and the internal electrodes 11a and 11b are arranged in the dielectric layer 1 in the central part of the main body 10 in the longitudinal direction.
3. The internal electrode 12 and the position confirmation electrode 17 are arranged in the same layer, and are laminated on the internal electrodes 11a and 11b with the dielectric layer 13 interposed therebetween. moreover,
The internal electrode 12 is arranged at the center of the main body 10 so as not to be exposed to the end surface of the main body 10, and is arranged so that one end in the longitudinal direction overlaps the internal electrode 11a and the other end overlaps the internal electrode 11b. ing. The position confirmation electrodes 17 are insulated from the internal electrodes 12 and arranged on both sides of the internal electrodes 12 in the longitudinal direction so as to be exposed on the end surface of the main body 10 .

Further, external electrodes 14 are formed at both ends of the main body 10 and are electrically connected to the internal electrodes 11a and 11b, so that the main body 10 can be connected to an external circuit via the external electrodes 14.

Next, a method of manufacturing the above-mentioned capacitor will be explained. As shown in FIG. 7(a), a palladium-based conductive paste is screen printed on a green sheet 15 made of a BaTiO3-based dielectric material and has plasticity, so that the sheets are arranged in a matrix. A plurality of conductive material films, ie, internal electrodes 11a and 11b formed thereon, are prepared. Furthermore, as shown in FIG. 7(b), a palladium-based conductive paste is screen printed on the green sheet 15 to form second electrodes arranged in a matrix corresponding to the internal electrodes 11a and 11b. A plurality of conductive material films, ie, internal electrodes 12, and position confirmation films, ie, position confirmation electrodes 17 are formed. At this time, as mentioned above, the main body 10
Internal electrodes 11a, 11b and position confirmation electrode 1 are provided at both ends of the
7 is led out, and the internal electrode 12 is placed in the center of the main body 10.

Further, these are laminated to form an integral body, and green sheets 15 are stacked on top and bottom, and pressure is applied in the layer direction to form a laminate. Cut. Here, internal electrodes 11a, 11b and a position confirmation electrode 17 are provided on the longitudinal end surface of the main body 10.
is exposed, so visually check it and connect the internal electrodes 11a, 11
By knowing the position of the position confirmation electrode 17 with respect to the position b, it is possible to easily know the position of the internal electrode 12 with respect to the positions of the internal electrodes 11a and 11b. That is, when the position of the internal electrode 12 shifts due to pressurization, the position of the position confirmation electrode 17 shifts accordingly.

Therefore, it is possible to easily determine whether the capacitance of the capacitor is within the specified range based on the position of the internal electrode 12 with respect to the internal electrodes 11a and 11b, and if the product is defective, work should be done here. Can be interrupted. Thereby, waste of time and labor can be reduced compared to the conventional method.

Those determined to be good are subjected to binder removal treatment and then fired at a predetermined temperature. Thereby, the main body 10 is obtained. Furthermore, external electrodes 14 are formed at both ends of the main body 10 using a silver-palladium-based conductive material, and a capacitor is formed by applying solder plating thereon.

As mentioned above, according to this embodiment, time,
It is possible to easily determine whether or not a desired laminate has been formed without wasting labor or the like. In addition, since the position confirmation electrode 17 can be formed together with the internal electrode 12, it can be easily implemented without major changes in the manufacturing process, and the cost will not increase. In this example, the present invention is applied to a ceramic capacitor, but the present invention is not limited thereto. For example, it can be applied to the manufacture of laminates such as piezoelectric actuators and laminated inductors.

Further, in this embodiment, the position confirmation electrodes 17 are arranged on both sides of the internal electrode 12, but the same effect can be obtained even if only one electrode is provided. Furthermore, as shown in FIG. 8, the same effect can be obtained by arranging the position confirmation electrodes 17 only at positions corresponding to the ends of the internal electrodes 12 in the width direction.

[0024]

As explained above, according to claim 1 of the present invention, the position of the second conductive material film can be known by visually checking the position confirmation film exposed on the end face. It is possible to easily determine whether or not a desired laminate has been formed without wasting time, effort, and the like.

Further, according to claim 2, in addition to the above-mentioned effects, since the position confirmation film can be formed together with the second conductive material film, it is not necessary to make a significant change in the manufacturing process. It can be easily implemented without causing any increase in cost.

[Brief explanation of the drawing]

[Figure 1] Side cross-sectional view of a low-capacity ceramic capacitor to which the present invention is applied

[Figure 2] Side cross-sectional view of a conventional low-capacity ceramic capacitor

[Figure 3] Planar cross-sectional view of a conventional low-capacity ceramic capacitor

[Figure 4] Diagram explaining problems in the conventional example

[Figure 5
] Planar sectional view of a low capacitance ceramic capacitor in one embodiment

[Figure 6] Diagram showing how electrodes are formed on the green sheet

[Figure 7] Planar sectional view of another low-capacity ceramic capacitor to which the present invention is applied

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10... Capacitor body, 11a, 11b, 12... Internal electrode, 13... Dielectric layer, 14... External electrode, 15... Green sheet, 17... Position confirmation electrode.

Claims (2)

[Claims] 1. After alternately laminating a first conductive material film exposed on the end face and a second conductive material film not exposed on the end face with an insulating and plastic sheet interposed therebetween, In the method for manufacturing a laminate in which a laminate is formed by applying pressure in the layer direction, during the lamination, a layer is formed on the end face in the same layer as the second conductive material film in a manner corresponding to the position of the second conductive material film. A method for manufacturing a laminate, characterized in that the exposed position confirmation film is arranged at a distance from the second conductive material film. 2. The method of manufacturing a laminate according to claim 1, wherein the position confirmation film is made of the same conductive material film as the second conductive material film.