KR101713088B1 - Method of identifying direction of multilayer ceramic capacitor, apparatus identifying direction of multilayer ceramic capacitor, and method of manufacturing multilayer ceramic capacitor - Google Patents

Abstract

The directional identification method of the multilayer ceramic capacitor includes the steps of transporting a plurality of multilayer ceramic capacitors 1 in a row in front of each of the magnetic generator 31 and the magnetic flux density meter 32, A magnetic flux density measuring device 32 for measuring the magnetic flux density when each of the magnetic flux density measuring devices 32 and 32 passes the front of the magnetic flux density measuring device 32 and the magnetic flux density measuring device for measuring the magnetic flux density, 1) in the stacking direction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer ceramic capacitor, and more particularly, to a multilayer ceramic capacitor having a multilayer ceramic capacitor and a method of manufacturing the multilayer ceramic capacitor. 2. Description of the Related Art [0002] A multilayer ceramic capacitor is a multi-

The present invention relates to a direction identification method for a multilayer ceramic capacitor, a direction identification device for a multilayer ceramic capacitor, and a method for manufacturing a multilayer ceramic capacitor.

The multilayer ceramic capacitor has a plurality of internal electrodes stacked along one direction. For this reason, in the multilayer ceramic capacitor, there is a desire to identify the stacking direction of the internal electrodes. However, when the multilayer ceramic capacitor is in the shape of a square column, for example, it is difficult to distinguish the lamination direction of the internal electrodes in the multilayer ceramic capacitor due to the appearance.

For example, Japanese Patent Application Laid-Open No. 7-115033 (Patent Document 1) discloses a method of identifying the stacking direction of the internal electrodes in a multilayer ceramic capacitor without depending on the appearance. Specifically, Patent Document 1 discloses a method of measuring the magnetic flux density of a multilayer ceramic capacitor by applying a constant magnetic field to a surface of the multilayer ceramic capacitor where the internal electrode layer is not drawn out, and identifying the direction of the internal electrode layer by magnetization strength. In this method, the capacitor is arranged in a direction in which the internal electrode is almost parallel to the magnetic flux (the internal electrode is in the vertical direction with respect to the bottom surface as the capacitor) and the state in which the capacitor is arranged in a direction And the magnetic flux density measured in the state where the capacitor is disposed.

However, when the stacking direction of the internal electrodes and the magnetic flux direction are parallel and when the stacking direction of the internal electrodes and the magnetic flux direction are perpendicular to each other, the difference in the magnetic flux density measured is very small. Further, the magnetic flux density measured greatly depends on the positional relationship between each of the magnet, the sensor probe, and the condenser. Particularly, in a small-sized multilayer ceramic capacitor, the influence of each positional relationship of the magnet, the sensor probe and the capacitor on the measured magnetic flux density is enormous.

Since the magnetic flux density difference measured when the lamination direction is different is small and the magnetic flux density measured according to the position of the capacitor at the time of measurement is significantly different, the method described in Patent Document 1 accurately identifies the lamination direction of the multilayer ceramic capacitor It is difficult to do.

This problem will be described in more detail. For example, it is assumed that a multilayer ceramic capacitor having a length dimension of 1 mm, a width dimension of 0.5 mm, a height dimension of 0.5 mm, and an electrostatic capacitance of 4.7 占 계 is used to measure the magnetic flux density under certain measurement conditions. The maximum magnetic flux density when the lamination direction of the internal electrodes of this multilayer ceramic capacitor is parallel to the magnetic flux direction is about 53.6 mT. On the other hand, when the stacking direction of the internal electrodes of this multilayer ceramic capacitor is perpendicular to the magnetic flux direction, the maximum magnetic flux density is about 52.3 mT. Therefore, in this multilayer ceramic capacitor, the maximum value of the magnetic flux density is different by 1.3 mT in the case where the lamination direction of the internal electrodes and the magnetic flux direction are parallel and perpendicular. Therefore, the difference between the maximum value of the magnetic flux density between the case where the lamination direction of the internal electrodes and the case of the magnetic flux direction are parallel to each other is only 2.4% with respect to the maximum value of the magnetic flux density when the lamination direction of the internal electrodes and the magnetic flux direction are parallel, to be.

The multilayer ceramic capacitor in which the lamination direction of the internal electrodes and the magnetic flux direction are parallel when the measurement position of the multilayer ceramic capacitor is shifted by 0.3 mm from the center position of the multilayer ceramic capacitor is about 52.3 mT, (When the measurement position is the center position of the multilayer ceramic capacitor) of the multilayer ceramic capacitor when the direction and the direction of the magnetic flux are perpendicular to each other. Therefore, when the measurement position of the multilayer ceramic capacitor can be changed by 0.3 mm or more, it is difficult to identify the direction of the multilayer ceramic capacitor. This problem becomes remarkable as the multilayer ceramic capacitor becomes smaller in size, for example, as the length dimension is 1 mm, the width dimension is 0.5 mm, and the height dimension is 0.5 mm, the measurement position becomes difficult to be determined as the center position .

Further, in the method described in Patent Document 1, it is necessary to dispose the self-generating device and the magnetic sensor so as to face each other with a capacitor interposed therebetween. Therefore, in the method described in Patent Document 1, there are restrictions on the arrangement of the magnetic sensor and the magnetic sensor. Therefore, there is a problem that the degree of freedom in designing the apparatus is low in the direction identification apparatus for a capacitor described in Patent Document 1. [

A main object of the present invention is to provide a method for accurately identifying the direction of a multilayer ceramic capacitor.

A method of identifying the direction of a multilayer ceramic capacitor according to the present invention is a method of identifying the direction of lamination of a multilayer ceramic capacitor having a plurality of laminated internal electrodes. A method of identifying the direction of a multilayer ceramic capacitor includes the steps of transporting a plurality of multilayer ceramic capacitors in a row in front of each of a magnetic generation device and a magnetic flux density meter, and a step of, when each of the multilayer ceramic capacitors passes in front of the magnetic flux density measuring device A step of measuring magnetic flux density by a magnetic flux density meter and a step of identifying the stacking direction based on the magnetic flux density measured in the step of measuring the magnetic flux density.

In one aspect of the present invention, in the step of identifying the stacking direction, the integrated value of the magnetic flux density is calculated on the basis of the magnetic flux density measured in the step of measuring the magnetic flux density, and based on the integrated value of the magnetic flux density Thereby identifying the stacking direction.

In one aspect of the present invention, the magnetic force generating device and the magnetic flux density measuring device are opposed to each other. In the step of measuring the magnetic flux density, the density of the magnetic flux generated from the self-generating device is measured by the magnetic flux density meter when each of the plurality of multilayer ceramic capacitors passes between the self-generating device and the magnetic flux density measuring device.

In one aspect of the present invention, the magnetic force generating device is disposed on the upstream side of the plurality of multilayer ceramic capacitors in the carrying direction, rather than the magnetic flux density measuring device. Further comprising the step of magnetizing each of the plurality of multilayer ceramic capacitors before the step of measuring the magnetic flux density.

In one aspect of the present invention, in the step of transporting the plurality of multilayer ceramic capacitors, the plurality of multilayer ceramic capacitors carry a plurality of multilayer ceramic capacitors so as to pass through the linear transport path. In the step of measuring the magnetic flux density, magnetic flux density is measured by a magnetic flux density meter when a plurality of multilayer ceramic capacitors pass in front of the magnetic flux density meter through the linear conveyance path.

In one aspect of the present invention, in the step of conveying the plurality of multilayer ceramic capacitors, a plurality of multilayer ceramic capacitors are conveyed while being accommodated in each of the plurality of accommodating portions provided along the outer periphery of the circular rotor. In the step of measuring the magnetic flux density, the magnetic flux density is measured by the magnetic flux density meter when the plurality of multilayer ceramic capacitors are passed in front of the magnetic flux density measuring instrument while being accommodated in each of the plurality of accommodating portions.

In an aspect of the present invention, in the step of transporting the plurality of multilayer ceramic capacitors, a plurality of multilayer ceramic capacitors are transported while being accommodated in each of a plurality of cavities provided in the package. In the step of measuring the magnetic flux density, the magnetic flux density is measured by the magnetic flux density meter when the plurality of multilayer ceramic capacitors are passed in front of the magnetic flux density measuring instrument while being accommodated in each of the plurality of cavities.

A method of manufacturing a series of multilayer ceramic capacitors according to the present invention includes the steps of identifying the laminating direction by the direction identification method of the multilayer ceramic capacitor described in any one of the above-described items, and a step of forming a plurality of multilayer ceramic capacitors And accommodating each of the plurality of cavities provided in the package.

A direction identifying device for a multilayer ceramic capacitor according to the present invention is a direction identifying device for identifying a lamination direction of a multilayer ceramic capacitor having a plurality of laminated internal electrodes. A directional identification device for a multilayer ceramic capacitor is connected to a magnetic flux density meter, a conveyance device for conveying a plurality of multilayer ceramic capacitors in a row in front of each of the magnetism generation device and the magnetic flux density meter, And a direction identifying section for identifying the stacking direction on the basis of the magnetic flux density measured by the magnetic flux density meter.

In one aspect of the present invention, the direction identifying section calculates the integrated value of the magnetic flux density based on the magnetic flux density measured by the magnetic flux density meter, and identifies the stacking direction based on the integrated value of the magnetic flux density.

In one aspect of the present invention, the self-generating device and the magnetic flux density meter are opposed to each other. The magnetic flux density meter measures the density of magnetic flux generated from the self-generating device when each of the plurality of multilayer ceramic capacitors carried by the carrying device passes between the self-generating device and the magnetic flux density measuring device.

In one aspect of the present invention, the magnetic force generating device is disposed on the upstream side of the plurality of multilayer ceramic capacitors in the carrying direction, rather than the magnetic flux density measuring device. The self-generating device magnetizes each of the plurality of multilayer ceramic capacitors before the magnetic flux density meter measures magnetic flux density.

In one aspect of the present invention, the transport apparatus includes a linear transport path for linearly transporting the multilayer ceramic capacitor. The magnetic flux density meter is installed in the linear conveyance path.

In one aspect of the present invention, the carrying apparatus includes a circular rotor that conveys the multilayer ceramic capacitor along an arc. The rotor includes a plurality of accommodating portions for accommodating a plurality of multilayer ceramic capacitors provided along the outer periphery of the rotor one by one. The magnetic flux density meter is installed in the rotor.

In one aspect of the present invention, the carrying apparatus carries a package including a plurality of cavities each containing a plurality of multilayer ceramic capacitors. The package passes through the front of the magnetic flux density meter.

In one aspect of the present invention, the rotor repeats rotation and stopping at regular intervals. Each of the plurality of accommodating portions passes in front of the magnetic flux density measuring instrument when the rotor rotates, and stops at a position not overlapping the magnetic flux density measuring instrument.

According to the present invention, it is possible to provide a method of accurately identifying the direction of the multilayer ceramic capacitor.

These and other objects, features, aspects and advantages of the present invention will become apparent from the following detailed description of the present invention, which is to be understood in connection with the accompanying drawings.

1 is a schematic side view of a directional identification device for a multilayer ceramic capacitor according to a first embodiment of the present invention.
2 is a schematic cross-sectional view of a series of multilayer ceramic capacitors according to the first embodiment of the present invention.
3 is a schematic plan view of a series of multilayer ceramic capacitors according to the first embodiment of the present invention.
4 is a schematic perspective view of a multilayer ceramic capacitor according to a first embodiment of the present invention.
5 is a schematic cross-sectional view taken along the line VV in Fig.
6 is a schematic view of magnetic force lines when there is no multilayer ceramic capacitor between the self-generating device and the magnetic flux density meter.
7 is a schematic view of a magnetic force line when a multilayer ceramic capacitor is positioned such that the internal electrode is perpendicular to the magnetic flux direction (the internal electrode is in the horizontal direction with respect to the bottom surface as a capacitor) between the magnetic generator and the magnetic flux density meter.
8 is a schematic diagram of a magnetic force line when a multilayer ceramic capacitor is positioned such that an internal electrode is horizontal (in the case of a capacitor, the internal electrode is in a vertical direction) between the self-generating device and the magnetic flux density meter.
9 is a graph showing a magnetic flux density of a horizontal product and a vertical product.
10 is a schematic graph showing the integral value of the magnetic flux density of the horizontal product and the vertical product.
11 is a schematic side view showing a main part of a direction identifying device for a multilayer ceramic capacitor according to the second embodiment.
12 is a schematic side view showing a main part of a direction identifying device for a multilayer ceramic capacitor according to the third embodiment.
13 is a schematic side view showing a direction identifying device for a multilayer ceramic capacitor according to the fourth embodiment.
14 is a schematic side view showing a direction identifying device for a multilayer ceramic capacitor according to the fifth embodiment.
Fig. 15 is a histogram of the maximum value of the magnetic flux density in Experimental Example 1. Fig.
16 is a histogram of the integral value of magnetic flux density in Experimental Example 1. FIG.
Fig. 17 is a schematic plan view of the direction-identifying device for a multilayer ceramic capacitor in the sixth embodiment. Fig.
Fig. 18 is a sectional view showing the main part of the direction identifying device of Fig. 17;
19 is a schematic plan view of a device for manufacturing a series of multilayer ceramic capacitors according to a seventh embodiment of the present invention.
20 is a schematic cross-sectional view of a series of multilayer ceramic capacitors according to a seventh embodiment of the present invention.
21 is a schematic diagram showing flux lines of a multilayer ceramic capacitor when the internal electrodes are parallel to the magnetic flux density meter.
22 is a schematic diagram showing a magnetic flux line of a multilayer ceramic capacitor when the internal electrodes are perpendicular to the magnetic flux density meter.
23 is a schematic plan view showing a main part of a direction identifying device for a multilayer ceramic capacitor according to the eighth embodiment.
24 is a schematic plan view showing the main part of a direction identifying device for a multilayer ceramic capacitor according to the ninth embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the following embodiments are merely examples. The present invention is not limited to the following embodiments.

In the drawings referred to in the embodiments and the like, members having substantially the same functions are referred to by the same reference numerals. The drawings referred to in the embodiments and the like are schematically shown. The dimensional ratios of the objects depicted in the drawings may differ from those of the actual objects. The dimensional ratios of objects and the like may be different from each other in drawings. The specific dimensional ratio of the object, etc. should be judged based on the following description.

(First Embodiment)

In this embodiment, the direction identification method of the multilayer ceramic capacitor 1 shown in Figs. 4 and 5 will be described. First, the configuration of the multilayer ceramic capacitor 1 to be identified will be described.

(Configuration of Multilayer Ceramic Capacitor 1)

As shown in Figs. 4 and 5, the multilayer ceramic capacitor 1 is provided with a ceramic body 10. As shown in Fig. The ceramic body 10 has a substantially rectangular parallelepiped shape. Specifically, the ceramic element 10 has a square columnar shape. The ceramic body 10 has first and second main faces 10a and 10b and first and second side faces 10c and 10d and first and second end faces 10e and 10f ). The first and second main faces 10a and 10b extend along the longitudinal direction L and the width direction W, respectively. The first major surface 10a and the second major surface 10b are parallel to each other. The first and second side surfaces 10c and 10d extend along the longitudinal direction L and the thickness direction T, respectively. The first side face 10c and the second side face 10d are parallel to each other. The first and second end faces 10e and 10f extend along the width direction W and the thickness direction T, respectively. The first end face 10e and the second end face 10f are parallel to each other.

The dimension along the longitudinal direction L of the ceramic body 10 is preferably 0.4 mm or more and 2.0 mm or less, more preferably 0.6 mm or more and 1.0 mm or less. The dimension along the width direction W of the ceramic body 10 is preferably 0.2 mm or more and 1.2 mm or less, more preferably 0.3 mm or more and 0.5 mm or less. The dimension along the thickness direction T of the ceramic body 10 is preferably 0.2 mm or more and 1.2 mm or less, more preferably 0.3 mm or more and 0.5 mm or less. A method in which the dimension along the longitudinal direction L is 1.0 mm or less and the dimension along the width direction W and the thickness direction T is 0.5 mm or less is preferable is the case where the size is smaller than this size, Is likely to change from the center position of the multilayer ceramic capacitor. It is preferable that the dimension along the longitudinal direction L is 0.6 mm or more and the dimension along the width direction W and the dimension along the thickness direction T are 0.3 mm or more, This is because it is easy to perform the direction identification by the magnetic flux density. For the same reason, a multilayer ceramic capacitor having a capacitance of 1 占 F or more is suitable for the present invention.

The ceramic body 10 can be made of a material mainly composed of dielectric ceramics, for example. Examples of the dielectric ceramic spheres, for example, a _{BaTiO 3, CaTiO 3, SrTiO 3} , CaZrO _3, or the like. At least one subcomponent such as a Mn compound, a Mg compound, a Si compound, a Co compound, a Ni compound, a rare earth compound and the like may be suitably added to the ceramic body 10.

The " substantially rectangular parallelepiped " includes a rectangular parallelepiped having corner portions or ridge portions chamfered, and a rectangular parallelepiped having corner portions or ridge line portions rounded.

As shown in Fig. 5, a plurality of internal electrodes 11 and 12 are provided in the ceramic body 10. In Fig. The plurality of internal electrodes (11, 12) are stacked along the thickness direction (T). Each of the internal electrodes 11 and 12 is provided in parallel to the longitudinal direction L and the width direction W. [ The internal electrodes 11 and the internal electrodes 12 are alternately arranged along the thickness direction T in the ceramic body 10. [ A ceramic portion 15 is disposed between the internal electrode 11 and the internal electrode 12 which are adjacent to each other in the thickness direction T. That is, the internal electrode 11 and the internal electrode 12, which are adjacent to each other in the thickness direction T, are opposed to each other via the ceramic portion 15.

The internal electrode 11 is drawn to the first end face 10e. An external electrode 13 is provided on the first end face 10e. The external electrode 13 is electrically connected to the internal electrode 11. The internal electrode 12 is drawn out to the second end face 10f. An external electrode 14 is provided on the second end face 10f. The external electrode 14 is electrically connected to the internal electrode 12. The internal electrodes 11 and 12 may be made of a magnetic material such as Ni. The external electrodes 13 and 14 may be made of a suitable conductive material such as Ni, Cu, Ag, Pd, Au, or Ag-Pd alloy.

As shown in Figs. 2 and 3, the multilayer ceramic capacitor 1 constitutes a series of multilayer ceramic capacitors 2. A series of multilayer ceramic capacitors 2 has a taping 20. The tapes 20 have a plurality of rectangular parallelepiped chambers 21 spaced along the longitudinal direction. A multilayer ceramic capacitor (1) is accommodated in each of a plurality of accommodating chambers (21). When viewed from the plane, the accommodation chamber 21 is larger than the multilayer ceramic capacitor 1. Therefore, in the housing chamber 21, the multilayer ceramic capacitor 1 is displaceable in the plane direction. When the position of the multilayer ceramic capacitor 1 in the housing chamber 21 varies from room to room 21, the amount of change from the center position of the multilayer ceramic capacitor in the magnetic flux density measurement also varies from room to room 21 do.

The multilayer ceramic capacitor 1 may be a three-terminal or multi-layer multilayer ceramic capacitor having side electrodes in addition to the two-terminal multilayer ceramic capacitor shown in Fig.

(Configuration of Direction Identification Device 3 of Multilayer Ceramic Capacitor)

The direction identification device 3 of the multilayer ceramic capacitor is a device for identifying the stacking direction of the plurality of internal electrodes 11 and 12 in the multilayer ceramic capacitor 1. [ Hereinafter, in the present specification, the term "stacking direction of the plurality of internal electrodes 11, 12 in the multilayer ceramic capacitor 1" is referred to as "stacking direction of the multilayer ceramic capacitor 1" .

As shown in Fig. 1, the direction identifying device 3 includes a self-generating device 31 and a magnetic flux density measuring device 32. [ The magnetic flux density meter 32 is arranged so as to be able to detect the density of the magnetic flux generated in the magnetism generating device 31. [ The magnetic flux density meter 32 measures the density of the magnetic flux generated from the magnetism generating device 31. Specifically, the magnetic flux density meter 32 continuously measures the magnetic flux density at intervals of 10 kHz or more and 100 kHz or less.

The direction identifying device 3 further comprises a transport device 35. [ The transfer device 35 passes the multilayer ceramic capacitor 1 between the self-generating device 31 and the magnetic flux density meter 32. More specifically, the conveying device 35 has a first roll 33 and a second roll 34. [ A series of multilayer ceramic capacitors 2 are wound around the first roll 33. A series of multilayer ceramic capacitors 2 are fed from the first roll 33. [ A series of the multilayer ceramic capacitors 2 passing between the self-generating device 31 and the magnetic flux density meter 32 is wound by the second roll 34.

The magnetic flux density meter 32 measures the magnetic flux density at least when the multilayer ceramic capacitor 1 passes the magnetic flux density meter 32. [ The magnetic flux density meter 32 outputs the measurement result to the direction identifying unit 36. [ The direction identifying section 36 identifies the stacking direction of the multilayer ceramic capacitor 1 based on the measurement result of the magnetic flux density outputted from the magnetic flux density meter 32. [ The direction identifying section 36 sequentially performs the identification in the stacking direction with respect to the plurality of multilayer ceramic capacitors 1 arranged in a line in a series of the multilayer ceramic capacitors 2 at intervals.

In the production of a series of multilayer ceramic capacitors 2, first a multilayer ceramic capacitor 1 is fabricated. Next, the produced multilayer ceramic capacitor 1 is accommodated in the taping 20 to produce a series of multilayer ceramic capacitors 2. Next, the stacking direction of the multilayer ceramic capacitor 1 contained in the series of multilayer ceramic capacitors 2 is identified. As a result, for example, when the alignment rate of the multilayer ceramic capacitor 1 is confirmed, or when an undesired multilayer ceramic capacitor 1 in the lamination direction is detected, the multilayer ceramic capacitor 1 is marked, The multilayer ceramic capacitor 1 is removed.

(Direction identification method)

Next, the direction identification method of the multilayer ceramic capacitor 1 performed by the direction identification unit 36 will be described. In the following description, the case where the lamination direction is perpendicular to the magnetic flux direction is referred to as " horizontal product " (since the multilayer ceramic capacitor is the horizontal direction of the internal electrode with respect to the bottom surface of the containing chamber 21) (The multilayer ceramic capacitor is referred to as the vertical direction with respect to the bottom surface of the containing chamber 21).

First, the principle of the direction identification method in the present embodiment will be described with reference to Figs. 6 to 8. Fig. 6, when the multilayer ceramic capacitor 1 is not positioned between the self-generating device 31 and the magnetic flux density meter 32, the magnetic flux lines passing through the magnetic flux density meter 32 (for example, Lm are the widest, in other words, the number of magnetic lines of force Lm per unit area is small, and the magnetic flux density is low.

7 and 8, when the multilayer ceramic capacitor 1 is placed between the self-generating device 31 and the magnetic flux density meter 32, the magnetic flux density is higher than when the multilayer ceramic capacitor 1 is not positioned, The distance between the lines of magnetic force Lm passing through the measuring device 32 is narrowed. When the multilayer ceramic capacitor 1 is placed between the self-generating device 31 and the magnetic flux density meter 32, the number of magnetic force lines Lm per unit area is larger than when the multilayer ceramic capacitor 1 is not located. The magnetic flux density in the case where the lamination direction shown in Fig. 8 is parallel to the magnetic flux direction (in the case where the internal electrode is in the vertical direction with respect to the bottom surface as a capacitor) The distance between the lines of magnetic force Lm passing through the measuring device 32 is narrowed. The number of magnetic lines of force Lm per unit area increases when the direction of lamination shown in Fig. 8 is parallel to the magnetic flux direction.

Therefore, as shown in Fig. 9, the magnetic flux density measured when the lamination direction is parallel to the magnetic flux direction is higher than when it is perpendicular. Further, as shown in Fig. 10, the integrated value of the magnetic flux density measured as compared to when the lamination direction is parallel to the magnetic flux direction is vertical.

Therefore, for example, the stacking direction of the multilayer ceramic capacitor 1 can be identified based on the maximum value of the measured magnetic flux density. For example, the stacking direction of the multilayer ceramic capacitor 1 can be identified based on the integrated value of the measured magnetic flux density.

From the viewpoint of more accurately identifying the stacking direction of the multilayer ceramic capacitor 1, it is preferable to identify the stacking direction based on the integrated value of the measured magnetic flux density. The integrated value D3 of the magnetic flux density of the horizontal product and the magnetic flux density Dp of the vertical product are smaller than the difference? D1 (D2-D1) between the maximum magnetic flux density D1 of the horizontal product and the maximum magnetic flux density D2 of the vertical product The difference? D2 (D4-D3) (see Fig. 10) of the integral value D4 is larger. Therefore, the identification accuracy can be improved by identifying the direction of the multilayer ceramic capacitor 1 on the basis of? D2, rather than identifying the direction of the multilayer ceramic capacitor 1 based on? D1. For example, even when the maximum value of the magnetic flux density fluctuates due to a change in the position at the time of detection of the multilayer ceramic capacitor 1, by using the integral value of the magnetic flux density, the stacking direction of the multilayer ceramic capacitor 1 is Can be accurately identified.

Further, when the stacking direction of the multilayer ceramic capacitor 1 is identified by using the integral value of the magnetic flux density, it is not necessary to detect the maximum value of the magnetic flux density. Therefore, the distance between the self-generating device 31 and the magnetic flux density meter 32 can be increased. Therefore, it is possible to suppress the decrease in the direction identification accuracy due to the positional variation of the multilayer ceramic capacitor 1 at the time of measuring the magnetic flux density of the multilayer ceramic capacitor 1. [

Particularly, when the number of stacked internal electrodes 11, 12 is small,? D1 is liable to become small, and the difference? D2 -? D1 between? D2 and? D1 is liable to become large. Therefore, when the number of laminated layers of the internal electrodes 11 and 12 is small, it is preferable to perform identification in the lamination direction by using the integral value of the magnetic flux density rather than using the maximum value of the magnetic flux density. Specifically, identification in the stacking direction using the integrated value of the magnetic flux density is more suitable for the multilayer ceramic capacitor 1 in which the number of laminated internal electrodes 11 and 12 is 100 or less.

Hereinafter, another example of the preferred embodiment of the present invention will be described. In the following description, members having functions substantially common to those of the first embodiment are referred to by common reference numerals, and description thereof will not be repeated.

(Second Embodiment)

In the first embodiment, the example of performing the process of measuring the magnetic flux density with respect to the multilayer ceramic capacitor 1 housed in a series of multilayer ceramic capacitors 2 has been described. However, the present invention is not limited to this.

For example, as shown in Fig. 11, a multilayer ceramic capacitor 1 not accommodated in taping is transported between the self-generating device 31 and the magnetic flux density meter 32 by the transport device 41, Direction may be identified. After the multilayer ceramic capacitor 1 is passed between the magnetism generating device 31 and the magnetic flux density meter 32, the multilayer ceramic capacitor 1 may be rotated to align the lamination directions, or the undesired multilayer ceramic The condenser 1 may be removed.

(Third Embodiment)

12 is a schematic side view showing a main part of a direction identifying device for a multilayer ceramic capacitor according to the third embodiment. In the present embodiment, the self-generating device 31 and the magnetic flux density meter 32 are provided on the conveying path 42. A plurality of multilayer ceramic capacitors 1 are fed in a line (along one direction) to the conveying path 42 by a feeder such as a linear feeder. The multilayer ceramic capacitor 1 determined to be improper in the stacking direction is blown from the conveying path 42 to the conveying path 44 by the gas ejected from the blowing hole 43. The discharged multilayer ceramic capacitor 1 is recovered or discarded via the conveying path 44.

The multilayer ceramic capacitor 1 conveyed to the conveying path 42 may be accommodated in the taping by, for example, a tapping receptacle, and may be mounted on a mounting substrate or the like, for example, by a mounting machine.

(Fourth Embodiment)

13 is a schematic side view showing a direction identifying device for a multilayer ceramic capacitor according to the fourth embodiment. The direction identification device in the fourth embodiment forms a part of a series of manufacturing devices for taping electronic parts.

In this embodiment, a ball feeder 50 is provided in a series of manufacturing apparatus for taping electronic components. A plurality of multilayer ceramic capacitors (1) are accommodated in the ball feeder (50). The ball feeder 50 sequentially supplies electronic parts to the linear feeder 51 by vibrating.

The linear feeder 51 carries the multilayer ceramic capacitor 1 supplied by vibration. The linear feeder 51 supplies the multilayer ceramic capacitor 1 to the transfer device 52. The transport apparatus 52 transports the multilayer ceramic capacitor 1 to the carrier tape 53. The transport apparatus 52 has a transport table 54 on the disk that rotates around the central axis C.

Specifically, in the present embodiment, the transport table 54, which is a circular rotor, rotates clockwise around the central axis C. The transport table 54 has a plurality of concave portions (accommodating portions) 54a. The plurality of concave portions 54a are provided in a line in the circumferential direction of the circular rotor. The multilayer ceramic capacitor 1 is fed from the linear feeder 51 to the concave portion 54a of the transport table 54 at the position P1. The multilayer ceramic capacitor 1 poured into the concave portion 54a in the position P1 is transported along the circumferential direction around the central axis C by the rotation of the transport table 54. [

The multilayer ceramic capacitor 1 is transported to the position P3. The multilayer ceramic capacitor 1 is housed in the containing chamber 53a of the carrier tape 53 from the carrying table 54 at the position P3. In the conveying path, a direction identifying device 55 is provided at a position P2 located between the position P1 and the position P3. The direction identifying device 55 is provided with a magnetism generating device 31 and a magnetic flux density measuring device 32.

In the direction identifying device 55, the stacking direction of the multilayer ceramic capacitor 1 is identified. After the multilayer ceramic capacitor 1 is passed between the self-generating device 31 and the magnetic flux density meter 32, the multilayer ceramic capacitor 1 may be rotated to align the lamination directions, or the undesired multilayer ceramic The condenser 1 may be removed. Also in the present embodiment, the stacking direction of the multilayer ceramic capacitor 1 can be identified before the multilayer ceramic capacitor 1 is accommodated in the taping.

(Fifth Embodiment)

14 is a schematic side view showing a direction identifying device for a multilayer ceramic capacitor according to the fifth embodiment. The direction identification device shown in Fig. 14 may be provided with a magnetic generation device 31 and a magnetic flux density meter 32, which are arranged via a mounter 70 for mounting on a mounting substrate 61, for example. In this case, the stacking direction of the multilayer ceramic capacitor 1 can be determined before mounting. Further, the mounter 70 may be provided with, for example, a suction nozzle.

(Experimental Example 1)

150 laminated capacitors having the following design parameters were prepared. Then, the maximum value of the magnetic flux density was measured in the state of being in the horizontal position, and after that, the maximum value of the magnetic flux density was measured. The results are shown in Fig. The integrated value of the magnetic flux density was measured in the state of being in the horizontal position, and after that, the integral value of the magnetic flux density was measured. The results are shown in Fig. 15 and 16, the vertical axis indicates the frequency, and the horizontal axis indicates the magnetic flux density.

From the results shown in Fig. 15, it can be seen that when the maximum value of the magnetic flux density is measured, there is a case where the difference in magnetic flux density between the horizontal product and the vertical product is unlikely to occur. On the other hand, when the integrated value of the magnetic flux density is measured, it can be seen that a difference in magnetic flux density is likely to occur between the horizontal product and the vertical product. From this result, it can be seen that the direction of the multilayer ceramic capacitor can be accurately identified by using the integral value of the magnetic flux density.

In this example, the size of the multilayer ceramic capacitor was 1 mm x 0.5 mm x 0.5 mm, the internal electrode was made of nickel, and the number of laminated internal electrodes was 40, and the capacitance of the multilayer ceramic capacitor Was set to 0.1 μF.

(Sixth Embodiment)

17 is a schematic plan view showing a direction identifying device of the multilayer ceramic capacitor 1 according to the sixth embodiment.

As shown in Fig. 17, the linear feeder 51 supplies the multilayer ceramic capacitor 1 to the rotary transport device 52. As shown in Fig. The transport apparatus 52 transports the multilayer ceramic capacitor 1 to the carrier tape 53. The transport apparatus 52 includes a transport table 54 on a disk rotating around the center axis C and a transport stage 71 (see FIG. 18) in which the transport table 54 is disposed. 17, the linear feeder 51 is provided with a magnetism generating device 60 for generating magnetism. By passing the multilayer ceramic capacitor 1 in front of the magnetism generating device 60, the multilayer ceramic capacitor 1 ) Is magnetized. The self-generating device 60 has a function of aligning the directions of the internal electrodes 11 and 12 by rotating the multilayer ceramic capacitor 1 by magnetic force.

The transport table 54 has a plurality of recesses 54a on the outer circumferential surface thereof and a plurality of recesses 54a are provided at equal intervals along the circumferential direction of the transport table 54. The plurality of concave portions 54a extend from the outer circumferential surface of the transport table 54 toward the central axis C and penetrate from one major surface of the transport table 54 to the other major surface. 18, the conveyance table 54 is provided on the conveyance stage 71, and the lower side of the concave portion 54a is closed by the conveyance stage 71. As shown in Fig.

As shown in Fig. 17, the electrostatic capacity measuring unit 75 is disposed at the position P12 located on the conveying path from the position P11 to the position P16. In this capacitance measuring portion 75, the capacitance of the multilayer ceramic capacitor 1 housed in the recess 54a is measured. The measured capacitance of the multilayer ceramic capacitor 1 is output to the control unit 73. [

A magnetic flux density measuring section constituting the direction identifying device 55 is provided at a position P13 located between the position P12 and the position P16. The magnetic flux density measuring section measures the magnetic flux density when the multilayer ceramic capacitor 1 passes through in order to identify the stacking direction of the multilayer ceramic capacitor 1. As shown in Fig. 18, the magnetic flux density measuring section has a self-generating device 55a and a magnetic flux density meter 55b. The self-generating device 55a is opposed to the magnetic flux density meter 55b. The multilayer ceramic capacitor 1 conveyed by the conveying device 52 passes between the self-generating device 55a and the magnetic flux density measuring device 55b. A transport table 54 and a transport stage 71 for transporting the multilayer ceramic capacitor 1 are positioned between the magnetostrictive device 55a and the magnetic flux density meter 55b.

And passes through the multilayer ceramic capacitor 1 from the magnetism generating device 55a to the magnetic flux density meter 55b when the direction of stacking is parallel to when the magnetization direction is perpendicular to the arrangement direction of the magnetism generating device 55a and the magnetic flux density meter 55b ) Of the magnetic flux density. Therefore, by detecting the magnetic flux density when the multilayer ceramic capacitor 1 passes between the magnetism generating device 55a and the magnetic flux density measuring device 55b by the magnetic flux density measuring device 55b, the lamination of the multilayer ceramic capacitor 1 Direction can be identified. The magnetic flux density meter 55b outputs the detected magnetic flux density to the control unit 73 which is the direction discriminating unit. The control unit 73 appropriately computes the measured magnetic flux density and obtains, for example, the integral value of the magnetic flux density.

From the viewpoint of more surely identifying the stacking direction of the multilayer ceramic capacitor 1, it is preferable that the transport table 54 is made of a non-magnetic material such as stainless steel, aluminum, plastic, or ceramics. It is also preferable that the transporting stage 71 is made of a non-magnetic material such as stainless steel, aluminum, plastic, or ceramics. Among them, the transport table 54 and the transport stage 71 are more preferably made of zirconia which is also excellent in abrasion resistance. In these cases, the density of the magnetic flux passing through the multilayer ceramic capacitor 1 can be measured more accurately.

As shown in Fig. 17, the image pickup section 72 is provided at the position P14 located between the position P13 and the position P16 in the transport path. The image pickup section 72 picks up the multilayer ceramic capacitor 1 from above. The picked-up image is output to the control unit 73.

A sorting section 74 is provided at a position P15 located between the position P14 and the position P16 in the conveying path. The selection unit 74 is connected to the control unit 73 and selects the multilayer ceramic capacitor 1 based on the instruction from the control unit 73. [ Specifically, the control section 73 judges whether or not the capacitance output from the capacitance measurement section 75 is within a predetermined capacitance range (capacitance specification). Further, the control section 73 determines whether or not the stacking direction specified based on the magnetic flux density coincides with a predetermined direction. The control unit 73 determines whether there is an appearance defect in the multilayer ceramic capacitor 1 based on the image output from the image pickup unit 72. [ The control unit 73 recognizes and removes the multilayer ceramic capacitor 1 that fails to meet any of the above three conditions as a defective product.

The arrangement of each of the electrostatic capacity measuring section 75, the magnetic flux density measuring section (direction identifying device 55), the image pickup section 72 and the sorting section 74 in this embodiment will be described more specifically. The conveyance table 54 performs a so-called intermittent operation in which rotation and stopping are repeated at regular intervals. The position of each of the electrostatic capacity measuring section 75, the imaging section 72 and the sorting section 74 overlaps with the position of the concave section 54a at the time of stopping the conveyance table 54. [ On the other hand, the position of the magnetic flux density measuring section overlaps with the position through which the concave portion 54a passes when the carrying table 54 is rotated.

That is, when the respective positions of the electrostatic capacity measuring section 75, the image pickup section 72, and the selector 74 overlap with the positions of the recesses 54a, the magnetic flux density measuring section (direction identifying device 55) And the position of the concave portion 54a do not overlap. Conversely, when the position of the magnetic flux density measuring section (direction identifying device 55) overlaps the position of the recessed portion 54a, the capacitance measurement section 75, the imaging section 72, and the selector 74 The positions of the concave portions 54a do not overlap with each other.

The overlapping of the positions of the electrostatic capacity measuring section 75, the image pickup section 72, the sorting section 74 and the magnetic flux density measuring section with the positions of the concave sections 54a means that the positions of the concave sections 54a in the circumferential direction The center of each of the electrostatic capacity measuring section 75, the image sensing section 72, the selector 74 and the magnetic flux density measuring section overlaps with one of the concave portions 54a.

For example, when N concave portions 54a are arranged at equal intervals on the conveyance table 54 and the conveyance table 54 repeats the rotation and stop of the (360 / N) chart, the capacitance measurement unit 75, the imaging section 72, and the sorting section 74 are shifted by an integral multiple of (360 / N) degrees from the rotation center of the transport table 54. [ On the other hand, the position of the magnetic flux density measuring section is different from the position shifted by an integral multiple of (360 / N) degrees with respect to the arrangement of the electrostatic capacity measuring section 75, the imaging section 72 and the sorting section 74, respectively.

In any of the first to sixth embodiments described so far, the interval between adjacent multilayer ceramic capacitors 1 affects the identification accuracy in the stacking direction. The lamination direction is identified by grasping the magnetic flux density when the multilayer ceramic capacitor 1 passes through the magnetic flux density measuring section. Therefore, if the intervals between adjacent multilayer ceramic capacitors 1 are excessively narrow, the magnetic flux density is influenced by the adjacent multilayer ceramic capacitor 1, and the identification accuracy in the lamination direction is lowered.

Therefore, it is preferable that the interval of the neighboring multilayer ceramic capacitors 1 is set to 1/2 or more of the dimension of the magnetostrictive device 55a in the passing direction of the multilayer ceramic capacitor 1. Alternatively, it is preferable that the intervals of the neighboring multilayer ceramic capacitors 1 are equal to or larger than the dimension of the multilayer ceramic capacitor 1 in the direction of passage of the multilayer ceramic capacitor 1.

In the first to sixth embodiments which have been described so far, the self-generating device 31 and the magnetic flux density meter 32 are disposed opposite to each other and the space between them is passed through the multilayer ceramic capacitor 1, In the seventh embodiment to be described, the arrangement of the self-generating device 31 and the magnetic flux density meter 32 is different.

(Seventh Embodiment)

As shown in Fig. 19, the linear feeder 51 is provided with a self-generating device 60 for generating magnetism. The multilayer ceramic capacitor 1 is passed through the magnetostrictive device 60 so that the multilayer ceramic capacitor 1 is magnetized. The fact that the multilayer ceramic capacitor 1 is magnetized means that the multilayer ceramic capacitor becomes magnetized.

The self-generating device 60 also has a function of matching the directions of the internal electrodes 11 and 12 in the multilayer ceramic capacitor 1 conveyed by the linear feeder 51. [ For example, when the lamination direction of the internal electrodes 11 and 12 in the multilayer ceramic capacitor 1 is parallel to the horizontal direction, the lamination direction of the internal electrodes 11 and 12 is made parallel to the up- The multilayer ceramic capacitor 1 is rotated by 90 占 by the magnetic force generated from the generator 60. [ Thus, the direction of the multilayer ceramic capacitor 1 passing through the portion where the self-generating device 60 is provided is aligned. However, the directions of all the multilayer ceramic capacitors 1 do not necessarily coincide with each other.

In the conveying path, a self-generating device 55a is disposed at a position P2 located between the position P1 and the position P3. The multilayer ceramic capacitor 1 is further magnetized by the self-generating device 55a. Therefore, the magnetized multilayer ceramic capacitor 1 is housed in the series of multilayer ceramic capacitors 2. In this embodiment, two self-generating devices, that is, a self-generating device 55a and a self-generating device 60 are provided. However, the present invention is not limited to this configuration. Only one self-generating device may be installed.

As shown in FIG. 20, a magnetic flux density meter 32 for measuring the magnetic flux density is provided below the series of multilayer ceramic capacitors 2. Specifically, the magnetic flux density meter 32 continuously measures the magnetic flux density at intervals of 10 kHz or more and 100 kHz or less.

In the present embodiment, the multilayer ceramic capacitor 1 is magnetized by the self-generating devices 55a and 60 (magnetization step). Next, the density of the magnetic flux generated from the magnetized multilayer ceramic capacitor 1 is measured by using the magnetic flux density meter 32 (magnetic flux density measurement step). In the magnetic flux density measuring step, it is preferable to measure the magnetic flux density when the multilayer ceramic capacitor 1 magnetized passes in front of the magnetic flux density measuring instrument 32.

Next, the direction identification section 36 identifies the stacking direction of the internal electrodes 11 and 12 in the multilayer ceramic capacitor 1 (identification step in the stacking direction) based on the measurement result of the magnetic flux density. It is possible to identify the direction of the multilayer ceramic capacitor 1 based on the maximum value or the integral value of the magnetic flux density measured at this time. As a result, for example, when the alignment rate of the multilayer ceramic capacitor 1 is checked, or when the multilayer ceramic capacitor 1 different in the direction of the multilayer ceramic capacitor 1 is detected, the multilayer ceramic capacitor 1 1, or the multilayer ceramic capacitor 1 is removed.

The principle of the direction identification method in this embodiment will be described with reference to Figs. 21 and 22. Fig. When the multilayer ceramic capacitor 1 is not present in front of the magnetic flux density meter 32, the magnetic flux density meter 32 does not substantially measure the magnetic flux. 21 and 22, when the magnetized multilayer ceramic capacitor 1 is located in front of the magnetic flux density meter 32, the magnetic line of force from the multilayer ceramic capacitor 1 is applied to the magnetic flux density meter 32 It passes. Therefore, the magnetic flux density is measured by the magnetic flux density meter 32. As a result, as shown in Figs. 9 and 10, the maximum value and the integral value of the magnetic flux density are different depending on the stacking direction of the multilayer ceramic capacitor 1.

In this embodiment, since the multilayer ceramic capacitor 1 is magnetized in advance, it is not always necessary to dispose the magnetostrictive devices 55a and 60 and the magnetic flux density measuring device 32 so as to face each other. Therefore, the degrees of freedom in arranging the self-generating devices 55a and 60 and the magnetic flux density meter 32 are high, and the structural limitations on the direction identifying device and the manufacturing device are reduced. Therefore, the direction identifying device and the manufacturing device can be miniaturized, for example. After the direction of the multilayer ceramic capacitor 1 is identified, the magnetized multilayer ceramic capacitor 1 may be demagnetized.

(Eighth embodiment and ninth embodiment)

23 is a schematic plan view showing a main part of a direction identifying device for a multilayer ceramic capacitor according to the eighth embodiment. 24 is a schematic plan view showing the main part of a direction identifying device for a multilayer ceramic capacitor according to the ninth embodiment.

In the seventh embodiment, an example of identifying the direction of the multilayer ceramic capacitor 1 accommodated in a series of multilayer ceramic capacitors 2 by the magnetic flux density meter 32 has been described. However, the present invention is not limited to this.

For example, as shown in Fig. 23, the magnetic flux density meter 32 may be provided in the transfer device 52. Fig. Specifically, in the eighth embodiment, the magnetic flux density meter 32 is disposed at the position P4 of the transport apparatus 52. [ The magnetic flux density meter 32 may be provided in the linear feeder 51 as in the ninth embodiment shown in Fig. 24, for example. Therefore, the direction of the multilayer ceramic capacitor 1 can be identified during the transportation by the transport device 52 before being accommodated in the series of multilayer ceramic capacitors 2.

In the eighth and ninth embodiments, a selecting unit for selecting the multilayer ceramic capacitor 1 in which the direction of the multilayer ceramic capacitor 1 is not the desired lamination direction between the position P4 and the position P3, The alignment unit may be further provided with a desired lamination direction by rotating the multilayer ceramic capacitor 1. The sorting section may remove the multilayer ceramic capacitor 1 in which the direction of stacking the internal electrodes 11 and 12 is not desired.

(Experimental Example 2)

(Example 1)

Six multilayer ceramic capacitors having the following design parameters were prepared. As shown in Fig. 19, the multilayer ceramic capacitor was magnetized only by the self-generating device 60 constituted by a pair of permanent magnets opposed to each other with the linear feeder 51 interposed therebetween. Three of the six samples were arranged so that the internal electrodes were parallel to the magnetic flux density meter and the magnetic flux density was measured by arranging the remaining three electrodes so that the internal electrodes were perpendicular to the magnetic flux density meter. Table 1 shows the maximum values of the measured magnetic flux densities. In Table 1, the sample described as " horizontal " is a sample in which the magnetic flux density is measured by arranging the internal electrodes so as to be in parallel with the magnetic flux density meter. In Table 1, a sample described as " vertical " is a sample in which magnetic flux density is measured by disposing the internal electrode so as to be perpendicular to the magnetic flux density meter.

(Example 2)

The six multilayer ceramic capacitors used in Example 1 were demagnetized in a multilayer ceramic capacitor so that the magnetic flux density was 0.05 mT or less, and then used again as a sample in the second embodiment. In the second embodiment, two self-generating devices, that is, a self-generating device 60 having the same structure as that of the first embodiment and a self-generating device 55a provided in the transfer device 52 and composed of a permanent magnet, . Of the six samples, three were arranged so that the internal electrodes were parallel to the magnetic flux density meter and the magnetic flux density was measured by arranging the remaining three electrodes so that the internal electrodes were perpendicular to the magnetic flux density meter. Table 1 shows the maximum values of the measured magnetic flux densities.

In the present example, the size of the multilayer ceramic capacitor was 1.15 mm x 0.65 mm x 0.65 mm, the internal electrode was made of nickel-based electrode, the number of laminated internal electrodes was 430, The capacitance was set to 10 μF.

Maximum value of magnetic flux density (mT) Example 1 Example 2 Sample 1 (horizontal) 0.108 0.309 Sample 2 (horizontal) 0.134 0.317 Sample 3 (horizontal) 0.134 0.316 Sample 1 (vertical) 0.268 0.416 Sample 2 (vertical) 0.238 0.420 Sample 3 (vertical) 0.216 0.414

From the results shown in Table 1, it can be seen that the direction of the multilayer ceramic capacitor can be identified by measuring the magnetic flux density of the multilayer ceramic capacitor which has been magnetized in advance. Further, by performing the magnetization twice as in the second embodiment, the measurement values (maximum value and integral value) of the magnetic flux density of the multilayer ceramic capacitor become large, and the direction can be further easily identified.

Having described embodiments of the present invention, it is to be understood that the embodiments disclosed herein are by way of illustration and not of limitation in all respects. It is intended that the scope of the invention be represented by the claims and that all changes that come within the meaning and range of equivalency of the claims are intended to be embraced therein.

Claims (16)

A method for identifying a stacking direction of a multilayer ceramic capacitor having a plurality of stacked internal electrodes,
A step of transporting a plurality of multilayer ceramic capacitors in a row in front of each of a self-generating device and a magnetic flux density meter,
A step of measuring the magnetic flux density by the magnetic flux density meter when each of the plurality of multilayer ceramic capacitors passes in front of the magnetic flux density measuring instrument,
And a step of calculating an integrated value of the magnetic flux density based on the magnetic flux density measured in the step of measuring the magnetic flux density and identifying the stacking direction based on the integrated value of the magnetic flux density Method of identifying the direction of a capacitor. delete The method according to claim 1,
Wherein the self-generating device and the magnetic flux density meter are opposed to each other,
The density of the magnetic flux generated from the magnetic generator by the magnetic flux density meter when each of the plurality of multilayer ceramic capacitors passes between the magnetism generating device and the magnetic flux density measuring instrument is set to Wherein the directional identification of the multilayer ceramic capacitor is carried out by the method. The method according to claim 1,
Wherein the self-generating device is disposed on an upstream side of the plurality of multilayer ceramic capacitors in the conveying direction than the magnetic flux density meter,
Further comprising the step of magnetizing each of the plurality of multilayer ceramic capacitors before the step of measuring the magnetic flux density. The method according to claim 1,
In the step of transporting the plurality of multilayer ceramic capacitors, the plurality of multilayer ceramic capacitors carry the plurality of multilayer ceramic capacitors so as to pass the linear transport path,
Wherein the magnetic flux density is measured by the magnetic flux density meter when the plurality of multilayer ceramic capacitors pass through the linear conveyance path and before passing through the magnetic flux density meter in the step of measuring the magnetic flux density. A method of identifying the direction of a ceramic capacitor. The method according to claim 1,
Wherein the plurality of multilayer ceramic capacitors are transported in a state of being accommodated in each of a plurality of accommodating portions provided along the outer periphery of a circular rotor, and in the step of transporting the plurality of multilayer ceramic capacitors,
The magnetic flux density is measured by the magnetic flux density meter when the plurality of multilayer ceramic capacitors are passed in front of the magnetic flux density measuring instrument while being accommodated in each of the plurality of accommodating portions in the step of measuring the magnetic flux density Of the directional identification of the multilayer ceramic capacitor. The method according to claim 1,
In the step of transporting the plurality of multilayer ceramic capacitors, the plurality of multilayer ceramic capacitors are transported while being accommodated in each of a plurality of cavities provided in the package,
The magnetic flux density is measured by the magnetic flux density meter when the plurality of multilayer ceramic capacitors are passed in front of the magnetic flux density measuring instrument while being accommodated in each of the plurality of cavities in the step of measuring the magnetic flux density Of the directional identification of the multilayer ceramic capacitor. A step of identifying the direction of lamination by the direction identification method of the multilayer ceramic capacitor according to claim 1;
And a step of accommodating a plurality of multilayer ceramic capacitors having the same laminating direction in each of a plurality of cavities provided in the package. A direction identifying device for identifying a stacking direction of a multilayer ceramic capacitor having a plurality of stacked internal electrodes,
A self-generating device,
A magnetic flux density meter,
A transporting device for transporting a plurality of multilayer ceramic capacitors in a row in front of each of said magnetism generating device and said magnetic flux density measuring device,
A direction identification unit connected to the magnetic flux density meter for calculating an integrated value of the magnetic flux density based on the magnetic flux density measured by the magnetic flux density meter and identifying the stacking direction based on the integrated value of the magnetic flux density And the directional identification of the multilayer ceramic capacitor. delete 10. The method of claim 9,
Wherein the self-generating device and the magnetic flux density meter are opposed to each other,
The magnetic flux density meter measures the density of the magnetic flux generated from the self-generating device when each of the plurality of multilayer ceramic capacitors carried by the carrying device passes between the self-generating device and the magnetic flux density measuring device Wherein the directional identification device of the multilayer ceramic capacitor is characterized by: 10. The method of claim 9,
Wherein the self-generating device is disposed on an upstream side of the plurality of multilayer ceramic capacitors in the conveying direction than the magnetic flux density meter,
Wherein the magnetostrictive device magnetizes each of the plurality of multilayer ceramic capacitors before the magnetic flux density meter measures the magnetic flux density. 10. The method of claim 9,
Wherein the conveying device includes a linear conveying path for linearly conveying the multilayer ceramic capacitor,
Wherein the magnetic flux density meter is provided in the linear conveyance path. 10. The method of claim 9,
Wherein the conveying device includes a circular rotor for conveying the multilayer ceramic capacitor along an arc,
Wherein the rotor includes a plurality of accommodating portions for accommodating the plurality of multilayer ceramic capacitors provided along the outer periphery of the rotor one by one,
Wherein the magnetic flux density meter is provided in the rotor. 10. The method of claim 9,
The transport apparatus transports a package including a plurality of cavities each containing the plurality of multilayer ceramic capacitors,
And the package passes through the front of the magnetic flux density meter. 15. The method of claim 14,
The rotor repeats rotation and stopping at regular intervals,
Wherein each of the plurality of accommodating portions passes in front of the magnetic flux density meter at the time of rotating the rotor and stops at a position that does not overlap with the magnetic flux density meter.

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