TW201610441A - 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

A method of identifying a direction of a multilayer ceramic capacitor includes the steps of transporting a plurality of multilayer ceramic capacitors in one line before each of a magnetism generator and a magnetic flux density measurement instrument, measuring a magnetic flux density with the magnetic flux density measurement instrument at the time when each of the plurality of multilayer ceramic capacitors passes before the magnetic flux density measurement instrument, and identifying a direction of stack of the multilayer ceramic capacitors based on the magnetic flux density measured in the step of measuring a magnetic flux density.

Description

Direction identification method of laminated ceramic capacitor, direction identification device of laminated ceramic capacitor, and manufacturing method of laminated ceramic capacitor

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

The multilayer ceramic capacitor includes a plurality of internal electrodes laminated in one direction. Therefore, for a multilayer ceramic capacitor, there is a demand for identifying the direction of lamination of its internal electrodes. However, for example, when the multilayer ceramic capacitor is in the form of a regular square column, it is difficult to recognize the lamination direction of the internal electrodes of the multilayer ceramic capacitor from the appearance.

For example, JP-A-7-115033 (Patent Document 1) discloses a method of not concentrating on the lamination direction of the internal electrodes of the configurable multilayer ceramic capacitor. Specifically, Patent Document 1 discloses a method of applying a fixed magnetic field to one surface of an internal electrode layer, measuring the magnetic flux density of the laminated ceramic capacitor, and identifying the direction of the internal electrode layer based on the strength of the magnetization. This method utilizes a principle in which the capacitor is disposed in a state in which the internal electrode and the magnetic flux are nearly parallel (as for the capacitor, the internal electrode is perpendicular to the bottom surface), and the capacitor is disposed inside. Electrode and flux The measured magnetic flux density differs in a state in which the orientation is nearly vertical (as for the capacitor, the internal electrode is horizontal with respect to the bottom surface).

However, the difference in magnetic flux density measured when the lamination direction of the internal electrodes is parallel to the magnetic flux direction and the lamination direction of the internal electrodes is perpendicular to the magnetic flux direction is extremely small. Moreover, the measured magnetic flux density is also greatly influenced by the positional relationship of each of the magnet, the sensor probe, and the capacitor. In particular, small-sized multilayer ceramic capacitors are particularly affected by the positional relationship of magnets, sensing probes, and capacitors from the measured magnetic flux density.

As described above, the difference in magnetic flux density measured when the lamination direction is different is small, and the measured magnetic flux density is greatly different depending on the position of the capacitor at the time of measurement, and therefore, the patent document 1 describes The method is difficult to accurately identify the lamination direction of the laminated ceramic capacitor.

The problem is more specifically explained. For example, a case is considered in which a magnetic layer density is measured under a certain measurement condition for 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 a capacitance of 4.7 μF. When the lamination direction of the internal electrodes of the multilayer ceramic capacitor is parallel to the magnetic flux direction, the maximum magnetic flux density is about 53.6 mT. On the other hand, when the lamination direction of the internal electrodes of the multilayer ceramic capacitor is perpendicular to the magnetic flux direction, the maximum magnetic flux density is about 52.3 mT. Therefore, in the case of the multilayer ceramic capacitor, when the lamination direction of the internal electrodes is parallel to the magnetic flux direction and the lamination direction of the internal electrodes is perpendicular to the magnetic flux direction, the maximum value of the magnetic flux density differs by only 1.3 mT. Therefore, the difference between the maximum value of the magnetic flux density between the lamination direction of the internal electrode and the magnetic flux direction is perpendicular to the maximum value of the magnetic flux density when the lamination direction of the internal electrode is parallel to the magnetic flux direction. Only 2.4%.

Further, when the measurement position of the multilayer ceramic capacitor is shifted by 0.3 mm from the center position of the laminated ceramic capacitor, the magnetic flux density of the multilayer ceramic capacitor in which the lamination direction of the internal electrode is parallel to the magnetic flux direction becomes about 52.3 mT, and the internal electrode The maximum value of the magnetic flux density of the multilayer ceramic capacitor when the lamination direction is perpendicular to the magnetic flux direction (the measurement position is When the center position of the multilayer ceramic capacitor is changed, it becomes almost the same. Thereby, when a change of 0.3 mm or more occurs in the measurement position of the multilayer ceramic capacitor, it is difficult to identify the direction of the laminated ceramic capacitor. This problem is caused by the fact that the size of the multilayer ceramic capacitor is reduced, for example, the size of each of the multilayer ceramics is reduced from 1 mm in length, 0.5 mm in width, and 0.5 mm in height, and it becomes more difficult to determine the measurement position at the center position.

Further, in the method described in Patent Document 1, it is necessary to arrange the magnetic generating device and the magnetic sensor to face each other with a capacitor interposed therebetween. Therefore, the method described in Patent Document 1 has limitations in the arrangement of the magnetic generating device and the magnetic sensor. Therefore, the direction recognition device for a capacitor described in Patent Document 1 has a problem that the degree of freedom in device design is low.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method for accurately identifying the direction of a laminated ceramic capacitor.

The direction identifying method of the multilayer ceramic capacitor according to the present invention is a method of identifying the lamination direction of a multilayer ceramic capacitor including a plurality of laminated internal electrodes. The method for identifying the direction of the multilayer ceramic capacitor includes the steps of: transporting one row of the plurality of laminated ceramic capacitors to each of the magnetic generating device and the magnetic flux density measuring device; and each of the plurality of laminated ceramic capacitors via the magnetic flux The magnetic flux density is measured by a magnetic flux density measuring device before the density measuring device; and the above-mentioned laminated direction is identified based on the magnetic flux density measured in the step of measuring the magnetic flux density.

In one aspect of the invention, in the step of identifying the layering direction, an integral value of the magnetic flux density is calculated based on the magnetic flux density measured in the step of measuring the magnetic flux density, based on the integral value of the magnetic flux density. Identify the above laminated direction.

In one aspect of the invention, the magnetic generating device and the magnetic flux density measuring device are opposed to each other. In the step of measuring the magnetic flux density, when each of the plurality of laminated ceramic capacitors passes between the magnetic generating device and the magnetic flux density measuring device, the magnetic flux density measuring device measures The amount of magnetic flux generated from the magnetic generating device.

In one aspect of the invention, the magnetic flux generating device is disposed on the upstream side of the conveying direction of the plurality of laminated ceramic capacitors. The present invention further includes a step of magnetizing each of the plurality of laminated 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 laminated ceramic capacitors, a plurality of laminated ceramic capacitors are transported through a plurality of laminated ceramic capacitors via a linear transfer path. In the step of measuring the magnetic flux density, the magnetic flux density is measured by a magnetic flux density measuring device before a plurality of laminated ceramic capacitors pass the magnetic flux density measuring device along the linear transport path.

In one aspect of the present invention, in the step of transporting the plurality of laminated ceramic capacitors, a plurality of laminated ceramic capacitors are housed in a state in which a plurality of stacked ceramic capacitors are accommodated in a plurality of housing portions provided along the outer circumference of the circular rotating body. In the step of measuring the magnetic flux density, when a plurality of laminated ceramic capacitors are passed through the magnetic flux density measuring device in a state of being accommodated in each of the plurality of housing portions, the magnetic flux density is measured by a magnetic flux density measuring device.

In one aspect of the present invention, in the step of transporting the plurality of laminated ceramic capacitors, a plurality of laminated ceramic capacitors are transported in a state in which each of a plurality of cavities provided in the package is accommodated. In the step of measuring the magnetic flux density, the magnetic flux density is measured by a magnetic flux density measuring instrument when a plurality of laminated ceramic capacitors are placed before the magnetic flux density measuring device in a state of being accommodated in each of the plurality of cavities.

The method of manufacturing a multilayer ceramic capacitor package according to the present invention includes the steps of: recognizing the lamination direction by the direction identification method of the multilayer ceramic capacitor according to any one of the above aspects; and a plurality of laminated ceramic capacitors having the lamination direction Each of the plurality of cavities provided in the package body.

The direction identifying device of the multilayer ceramic capacitor according to the present invention is a direction identifying device for identifying a stacking direction of a multilayer ceramic capacitor including a plurality of laminated internal electrodes. product The direction identification device of the layer ceramic capacitor includes: a magnetic generation device; a magnetic flux density measuring device; and a conveying device that transports a plurality of laminated ceramic capacitors before the magnetic generating device and the magnetic flux density measuring device; and direction recognition The portion is connected to the magnetic flux density measuring device and recognizes the above laminated direction based on the magnetic flux density measured by the magnetic flux density measuring device.

In one aspect of the invention, the direction identifying unit calculates an integral value of the magnetic flux density based on the magnetic flux density measured by the magnetic flux density measuring device, and identifies the laminated direction based on the integrated value of the magnetic flux density.

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

In one aspect of the invention, the magnetic flux generating device is disposed on the upstream side of the conveying direction of the plurality of laminated ceramic capacitors. The magnetic generating device magnetizes each of a plurality of laminated ceramic capacitors before the magnetic flux density measuring device measures the magnetic flux density.

In one aspect of the invention, the conveying device includes a linear conveyance path that conveys the laminated ceramic capacitor in a straight line. The magnetic flux density measuring device is disposed on the linear transport path.

In one aspect of the invention, the conveying device includes a circular rotating body that carries the laminated ceramic capacitor along a circular arc. The rotator includes a plurality of accommodating portions, and the plurality of laminated ceramic capacitors are housed one by one. The magnetic flux density measuring device is disposed on the rotating body.

In one aspect of the invention, the transport device transports a package including a plurality of cavities that accommodate a plurality of laminated ceramic capacitors one by one. The package passes before the flux density measurer.

In one aspect of the invention, the rotating system repeats the rotational motion and the stop at regular intervals. Each of the plurality of housing portions is subjected to magnetic flux density measurement during the rotational movement of the rotating body Before the gauge, stop at a position that does not overlap the flux density measurer.

According to the present invention, a method of accurately identifying the direction of a laminated ceramic capacitor can be provided.

The above and other objects, features, aspects and advantages of the present invention will become apparent from

1‧‧‧Multilayer ceramic capacitors

2‧‧‧Multilayer Ceramic Capacitor Bank

3‧‧‧ Directional identification device for laminated ceramic capacitors

10‧‧‧ body

10a‧‧‧1st main surface

10b‧‧‧1st main surface

10c‧‧‧1st side

10d‧‧‧2nd side

10e‧‧‧1st end

10f‧‧‧2nd end face

11‧‧‧Internal electrodes

12‧‧‧Internal electrodes

14‧‧‧External electrode

15‧‧‧Department of Ceramics

20‧‧ ‧ cover tape

21‧‧‧ Containment room

31‧‧‧Magnetic generating device

32‧‧‧Magnetic density measuring device

33‧‧‧1st roller

34‧‧‧2nd roller

35‧‧‧Transporting device

36‧‧‧ Direction Identification Department

41‧‧‧Transporting device

42‧‧‧Transportation path

43‧‧‧Air supply hole

44‧‧‧Transportation path

50‧‧‧Ball feeder

51‧‧‧Line Feeder

52‧‧‧Transporting device

53‧‧‧ Carrier tape

54‧‧‧Transportation station

54a‧‧‧ recess

55‧‧‧ Directional identification device

55a‧‧‧Magnetic generating device

55b‧‧‧Magnetic generating device

60‧‧‧Magnetic generating device

70‧‧‧SMT machine

71‧‧‧Transporting station

72‧‧‧Photography Department

73‧‧‧Control Department

74‧‧‧ sorting department

75‧‧‧Electrostatic capacitance measurement department

C‧‧‧ center axis

D1‧‧‧Maximum magnetic flux density

D2‧‧‧Maximum magnetic flux density

D3‧‧‧Maximum magnetic flux density

L‧‧‧ Length direction

Lm‧‧‧ magnetic line

P1‧‧‧ position

P2‧‧‧ position

P3‧‧‧ position

P4‧‧‧ position

P11‧‧‧ position

P12‧‧‧ position

P13‧‧‧ position

P14‧‧‧ position

P15‧‧‧ position

P16‧‧‧ position

T‧‧‧ thickness direction

W‧‧‧Width direction

Fig. 1 is a schematic side view showing a direction identifying device for a multilayer ceramic capacitor according to a first embodiment of the present invention.

Fig. 2 is a cross-sectional view showing a schematic view of a multilayer ceramic capacitor package according to a first embodiment of the present invention.

Fig. 3 is a plan view showing a schematic view of a multilayer ceramic capacitor bank according to a first embodiment of the present invention.

Fig. 4 is a perspective view showing a schematic view of a multilayer ceramic capacitor bank according to a first embodiment of the present invention.

Figure 5 is a cross-sectional view of the diagram of line V-V of Figure 4.

Fig. 6 is a schematic view showing magnetic lines of force when there is no laminated ceramic capacitor between the magnetic generating device and the magnetic flux density measuring device.

Figure 7 is a diagram showing the manner in which the internal electrode and the magnetic flux direction are perpendicular (as for the capacitor, the internal electrode is horizontal with respect to the bottom surface), and the magnetic field line of the laminated ceramic capacitor is located between the magnetic generating device and the magnetic flux density measuring device. Pattern diagram.

Figure 8 is a diagram showing the manner in which the internal electrode and the magnetic flux direction are horizontal (as for the capacitor, the internal electrode is perpendicular to the bottom surface), and the magnetic field line of the laminated ceramic capacitor is located between the magnetic generating device and the magnetic flux density measuring device. Pattern diagram.

Fig. 9 is a graph showing the mode of magnetic flux density of horizontal products and vertical products.

Fig. 10 is a graph showing the mode of the integral value of the magnetic flux density of the horizontal product and the vertical product.

Fig. 11 is a schematic side view showing a main part of a direction identifying device for a multilayer ceramic capacitor according to a second embodiment.

Fig. 12 is a schematic side view showing a main part of a direction identifying device for a multilayer ceramic capacitor according to a third embodiment.

Fig. 13 is a schematic side view showing the direction identifying device of the multilayer ceramic capacitor of the fourth embodiment.

Fig. 14 is a schematic side view showing the direction identifying device of the multilayer ceramic capacitor of the fifth embodiment.

Fig. 15 is a histogram of the maximum value of the magnetic flux density of Experimental Example 1.

Fig. 16 is a histogram of the integral value of the magnetic flux density of Experimental Example 1.

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

Figure 18 is a cross-sectional view showing the main part of the direction recognizing device of Figure 17.

Fig. 19 is a schematic plan view showing a manufacturing apparatus of a multilayer ceramic capacitor bank according to a seventh embodiment of the present invention.

Figure 20 is a cross-sectional view showing a schematic view of a multilayer ceramic capacitor bank in a seventh embodiment of the present invention.

Fig. 21 is a schematic view showing a magnetic flux line of a multilayer ceramic capacitor in the case where the internal electrode is parallel to the magnetic flux density measuring device.

Fig. 22 is a schematic view showing a magnetic flux line of a laminated ceramic capacitor in the case where the internal electrode is perpendicular to the magnetic flux density measuring device.

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

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

Hereinafter, each embodiment of the present invention will be described with reference to the drawings. Further, the following embodiments are merely illustrative. The present invention is by no means limited to the following embodiments.

In addition, members having substantially the same functions in the respective drawings referred to in the embodiments and the like are denoted by the same reference numerals. Moreover, the drawings referred to in the embodiments and the like are schematically described. Therefore, there is a case where the size ratio of the object drawn in the drawing is different from the actual object size ratio. Even between the various patterns, there are cases where the size ratio of the objects is different. The specific size ratio of the object should be judged according to the following instructions.

(First embodiment)

In the present embodiment, a method of identifying the direction 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.

(Composition of laminated ceramic capacitor 1)

As shown in FIGS. 4 and 5, the multilayer ceramic capacitor 1 includes a ceramic body 10. The ceramic body 10 has a substantially rectangular parallelepiped shape. Specifically, the ceramic body 10 is in the form of a regular square column. The ceramic body 10 has first and second main surfaces 10a and 10b, first and second side faces 10c and 10d, and first and second end faces 10e and 10f (see FIG. 5). The first and second main surfaces 10a and 10b extend in the longitudinal direction L and the width direction W, respectively. The first main surface 10a and the second main surface 10b are parallel to each other. The first and second side faces 10c and 10d extend in the longitudinal direction L and the thickness direction T, respectively. The first side surface 10c and the second side surface 10d are parallel to each other. The first and second end faces 10e and 10f extend in the width direction W and the thickness direction T, respectively. The first end surface 10e and the second end surface 10f are parallel to each other.

The dimension of the ceramic element body 10 in the longitudinal direction L 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 of the ceramic element body 10 in the width direction W 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 of the ceramic element body 10 in the thickness direction T 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 reason why the length along the length L Preferably, it is 1.0 mm or less, and the dimension in the width direction W and the thickness direction T is preferably 0.5 mm or less, and the measurement of the magnetic flux density is particularly easy for the self-assembled ceramic capacitor. The center position changes. Further, the dimension in the longitudinal direction L is preferably 0.6 mm or more, and the dimension in the width direction W and the dimension in the thickness direction T are preferably 0.3 mm or more, which is higher in the density of the internal electrodes. It is more advantageous to identify the direction by the magnetic flux density. For the same reason, the present invention is suitable for a multilayer ceramic capacitor having an electrostatic capacitance of 1 μF or more.

The ceramic body 10 can be made of, for example, a material mainly composed of a dielectric ceramic. Specific examples of the dielectric ceramics include BaTiO ₃ , CaTiO ₃ , SrTiO ₃ , or CaZrO ₃ . At least one auxiliary component such as a Mn compound, a Mg compound, a Si compound, a Co compound, a Ni compound, and a rare earth compound may be appropriately added to the ceramic element body 10.

In addition, the "substantially rectangular parallelepiped" refers to a rectangular parallelepiped including a chamfered corner portion or a ridge portion, and a rectangular parallelepiped in which the corner portion or the ridge portion is rounded.

As shown in FIG. 5, a plurality of internal electrodes 11, 12 are provided inside the ceramic body 10. The plurality of internal electrodes 11, 12 are laminated in the thickness direction T. Each of the internal electrodes 11 and 12 is provided in parallel in the longitudinal direction L and the width direction W. Inside the ceramic body 10, the internal electrode 11 and the internal electrode 12 are alternately arranged in the thickness direction T. A ceramic portion 15 is disposed between the adjacent internal electrode 11 and the internal electrode 12 in the thickness direction T. That is, the adjacent internal electrodes 11 and the internal electrodes 12 in the thickness direction T are opposed to each other via the ceramic portion 15.

The internal electrode 11 is led out 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 led 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, 12 may be made of a magnetic material such as Ni. The external electrodes 13, 14 may be composed 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 laminated ceramic capacitor group 2. The multilayer ceramic capacitor bank 2 has a taping 20. The cover tape 20 has a rectangular parallelepiped accommodation chamber 21 which is provided at intervals in the longitudinal direction. The multilayer ceramic capacitor 1 is housed in each of the plurality of storage chambers 21. The storage chamber 21 is larger than the multilayer ceramic capacitor 1 in plan view. Therefore, in the storage chamber 21, the laminated ceramic capacitor 1 can be displaced in the plane direction. If the position of the multilayer ceramic capacitor 1 in the storage chamber 21 is different for each of the storage chambers 21, the amount of change in the magnetic flux density measured from the center position of the multilayer ceramic capacitor is also different for each of the storage chambers 21.

In addition to the two-terminal type multilayer ceramic capacitor shown in FIG. 4, the multilayer ceramic capacitor 1 may be a three-terminal or multi-terminal type multilayer ceramic capacitor including a side electrode.

(Composition of the direction identification device 3 of the laminated ceramic capacitor)

The direction identifying device 3 of the multilayer ceramic capacitor is a device for identifying the lamination direction of the plurality of internal electrodes 11 and 12 of the multilayer ceramic capacitor 1. In the present specification, the "layering direction of the plurality of internal electrodes 11 and 12 of the multilayer ceramic capacitor 1" is referred to as "the lamination direction of the laminated ceramic capacitor 1," or simply "the lamination direction".

As shown in FIG. 1, the direction identifying device 3 includes a magnetic generating device 31 and a magnetic flux density measuring device 32. The magnetic flux density measuring device 32 is disposed to be capable of detecting the magnetic flux density generated by the magnetic generating device 31. The magnetic flux density measuring device 32 measures the magnetic flux density generated from the magnetic generating device 31. Specifically, the magnetic flux density measuring device 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 includes a transport device 35. The transport device 35 passes the multilayer ceramic capacitor 1 between the magnetic generating device 31 and the magnetic flux density measuring device 32. Specifically, the conveying device 35 has a first roller 33 and a second roller 34. The laminated ceramic capacitor group 2 is wound around the first roller 33, and the multilayer ceramic capacitor group 2 is sent out from the first roller 33. The laminated ceramic capacitor group 2 passing between the magnetic generating device 31 and the magnetic flux density measuring device 32 is wound around the second roller 34.

The magnetic flux density measuring device 32 measures the magnetic flux density at least before the multilayer ceramic capacitor 1 passes through the magnetic flux density measuring device 32. The magnetic flux density measurer 32 outputs the measurement result to the direction identifying portion 36. The direction recognizing unit 36 identifies the lamination direction of the multilayer ceramic capacitor 1 based on the measurement result of the magnetic flux density output from the magnetic flux density measuring device 32. The direction identifying unit 36 sequentially recognizes the laminated direction of the plurality of laminated ceramic capacitors 1 which are arranged in a line with each other in the multilayer ceramic capacitor group 2.

When manufacturing the multilayer ceramic capacitor bank 2, first, the multilayer ceramic capacitor 1 is produced. Next, the produced multilayer ceramic capacitor 1 is housed in the cover tape 20 to form a laminated ceramic capacitor group 2. Next, the lamination direction of the multilayer ceramic capacitor 1 accommodated in the multilayer ceramic capacitor group 2 is identified. As a result, for example, when the multilayer ceramic capacitor 1 is confirmed, or when the multilayer ceramic capacitor 1 is not in the desired lamination direction, the multilayer ceramic capacitor 1 is marked or the multilayer ceramic capacitor 1 is removed.

(direction identification method)

Next, a method of identifying the direction of the multilayer ceramic capacitor 1 by the direction identifying unit 36 will be described. In the following description, the vertical direction of the lamination direction and the magnetic flux direction is referred to as "horizontal product" (as for the multilayer ceramic capacitor, the internal electrode is horizontal with respect to the bottom surface of the storage chamber 21), and the parallel is set to " Vertical product" (As for the multilayer ceramic capacitor, the internal electrodes are perpendicular to the bottom surface of the housing chamber 21).

First, the principle of the direction identifying method of the present embodiment will be described with reference to Figs. 6 to 8 . For example, as shown in FIG. 6, when the multilayer ceramic capacitor 1 is not located between the magnetic generating device 31 and the magnetic flux density measuring device 32, the interval of the magnetic lines of force Lm passing through the magnetic flux density measuring device 32 becomes the widest, in other words, The number of magnetic lines of force Lm per unit area is reduced, and the magnetic flux density becomes a lower value.

As shown in FIGS. 7 and 8, the multilayer ceramic capacitor 1 is located between the magnetic generating device 31 and the magnetic flux density measuring device 32, and the laminated ceramic capacitor 1 is located in the magnetic state. When the generating device 31 is between the magnetic flux density measuring device 32, the interval of the magnetic lines of force Lm passing through the magnetic flux density measuring device 32 is narrowed. In contrast to the case where the multilayer ceramic capacitor 1 is not located between the magnetic generating device 31 and the magnetic flux density measuring device 32, when the laminated ceramic capacitor 1 is positioned between the magnetic generating device 31 and the magnetic flux density measuring device 32, the unit area is The number of magnetic lines of flux Lm increases. The lamination direction shown in FIG. 8 is parallel to the magnetic flux direction (as for the capacitor, the internal electrode is perpendicular to the bottom surface) when it is perpendicular to the one shown in FIG. 7 (as for the capacitor, the internal electrode is horizontal with respect to the bottom surface), and the magnetic The interval of the magnetic lines of force Lm of the pass density measuring device 32 is narrowed. When the lamination direction shown in Fig. 8 is parallel to the magnetic flux direction, the number of magnetic lines of force Lm per unit area increases.

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

Therefore, for example, the lamination direction of the laminated ceramic capacitor 1 can be identified based on the maximum value of the measured magnetic flux density. For example, the lamination direction of the laminated 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 lamination direction of the laminated ceramic capacitor 1, it is preferable to identify the lamination direction based on the integrated value of the measured magnetic flux density. The difference between the integral value D3 of the magnetic flux density of the horizontal product and the integral value D4 of the magnetic flux density of the vertical product Δd2 (D4-D3) (refer to FIG. 10), which is greater than the maximum magnetic flux density D1 of the horizontal product and the maximum of the vertical product. The difference Δd1 (D2-D1) between the magnetic flux densities D2 (refer to Fig. 9). Therefore, the direction in which the multilayer ceramic capacitor 1 is identified based on Δd2 can improve the recognition accuracy from the direction in which the laminated ceramic capacitor 1 is identified based on Δd1. For example, even when the maximum value of the magnetic flux density does not match due to the positional deviation when the ceramic capacitor 1 is laminated, the laminated direction of the multilayer ceramic capacitor 1 can be accurately identified by using the integral value of the magnetic flux density.

Further, when the laminated direction of the multilayer ceramic capacitor 1 is identified using the integral value of the magnetic flux density, it is necessary to detect the maximum value of the magnetic flux density. Therefore, it is necessary to grow the magnetic generating device 31 The distance from the magnetic flux density measurer 32. Therefore, it is possible to suppress a decrease in the direction recognition accuracy caused by the positional deviation of the multilayer ceramic capacitor 1 when the magnetic flux density of the multilayer ceramic capacitor 1 is measured.

In particular, when the number of layers of the internal electrodes 11 and 12 is small, Δd1 is easily reduced, and the difference (Δd2 - Δd1) between Δd2 and Δd1 is easily increased. Therefore, when the number of layers of the internal electrodes 11 and 12 is small, it is preferable to use the integral value of the magnetic flux density to identify the layering direction as compared with the maximum value of the magnetic flux density. Specifically, the identification of the lamination direction using the integral value of the magnetic flux density is more suitable for the multilayer ceramic capacitor 1 in which the number of layers of the internal electrodes 11 and 12 is 100 or less.

Hereinafter, another example of a preferred embodiment of the present invention will be described. In the following description, components having substantially the same functions as those of the above-described first embodiment are denoted by the same reference numerals, and the description thereof will not be repeated.

(Second embodiment)

In the first embodiment, an example in which the magnetic flux density measuring step is performed on the multilayer ceramic capacitor 1 housed in the multilayer ceramic capacitor group 2 will be described. However, the invention is not limited thereto.

For example, as shown in FIG. 11, the laminated ceramic capacitor 1 not accommodated in the cover tape may be conveyed between the magnetic generating device 31 and the magnetic flux density measuring device 32 by the transfer device 41, and the lamination direction may be recognized. Alternatively, after the multilayer ceramic capacitor 1 is passed between the magnetic generating device 31 and the magnetic flux density measuring device 32, the laminated ceramic capacitor 1 may be rotated to have the lamination direction thereof uniform; and the multilayer ceramic capacitor not having the desired lamination direction may be removed. 1.

(Third embodiment)

Fig. 12 is a schematic side view showing a main part of a direction identifying device for a multilayer ceramic capacitor according to a third embodiment. In the present embodiment, the magnetic generation device 31 and the magnetic flux density measuring device 32 are provided on the transport path 42. In the transport path 42, a plurality of laminated ceramic capacitors 1 are supplied in a row (in one direction) by a feeder such as a linear feeder. It is determined that the gas discharged from the air supply hole 43 by the multilayer ceramic capacitor 1 which is not in the desired lamination direction is blown from the transport path 42 to the transport path 44. The laminated ceramic capacitor 1 that has been blown off is recovered or discarded via the transfer path 44.

The multilayer ceramic capacitor 1 that is transported along the transport path 42 can be housed in the cover tape by, for example, a cover tape storage device, and can be attached to a mounting substrate or the like by, for example, a mounting machine.

(Fourth embodiment)

Fig. 13 is a schematic side view showing the direction identifying device of the multilayer ceramic capacitor of the fourth embodiment. The direction identifying device of the fourth embodiment constitutes a part of a manufacturing device of a cover tape type electronic component group.

In the present embodiment, a ball feeder 50 is provided in the manufacturing apparatus of the cover tape type electronic component group. The ball type feeder 50 houses a plurality of laminated ceramic capacitors 1. The ball feeder 50 sequentially supplies the electronic components to the linear feeder 51 by vibration.

The linear feeder 51 conveys 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 device 52 transports the multilayer ceramic capacitor 1 to the carrier tape 53. The conveying device 52 has a disk-shaped conveying table 54 that rotates around the central axis C.

Specifically, in the present embodiment, the circular rotating body, that is, the transfer table 54 is rotated clockwise around the central axis C. The transfer table 54 includes a plurality of recesses (accommodating portions) 54a. The plurality of recesses 54a are arranged in a line along the outer circumference of the circular rotor. The concave portion 54a of the transfer table 54 is attached to the multilayer ceramic capacitor 1 in a vibrating manner from the linear feeder 51 at the position P1. The multilayer ceramic capacitor 1 that is vibrated into the concave portion 54a at the position P1 is conveyed in the circumferential direction around the central axis C by the rotation of the transfer table 54.

The multilayer ceramic capacitor 1 is transported to the position P3. The multilayer ceramic capacitor 1 is housed in the storage chamber 53a of the carrier tape 53 from the transfer table 54 at the position P3. A direction identifying means 55 is provided at a position P2 between the position P1 and the position P3 in the transport path. Direction recognition The device 55 includes a magnetic generating device 31 and a magnetic flux density measuring device 32.

The direction identifying means 55 recognizes the lamination direction of the multilayer ceramic capacitor 1. After the multilayer ceramic capacitor 1 is passed between the magnetic generating device 31 and the magnetic flux density measuring device 32, the laminated ceramic capacitor 1 is rotated to make the lamination direction uniform, and the laminated ceramic capacitor 1 which is not in the desired lamination direction can be taken out. . In the present embodiment, the laminated direction of the multilayer ceramic capacitor 1 can be identified before the multilayer ceramic capacitor 1 is housed in the cover tape.

(Fifth Embodiment)

Fig. 14 is a schematic side view showing the direction identifying device of the multilayer ceramic capacitor of the fifth embodiment. The direction identifying device shown in FIG. 14 may include, for example, a magnetic generating device 31 and a magnetic flux density measuring device 32 that are disposed to interpose the mounter 70 for mounting the mounting substrate 61. In this case, the lamination direction of the multilayer ceramic capacitor 1 can be discriminated before mounting. Furthermore, the placement machine 70 may also be provided with an adsorption nozzle.

(Experimental Example 1)

150 multilayer capacitors having the following design parameters were prepared. Next, the maximum value of the magnetic flux density was measured in a state of being a horizontal product, and thereafter, the maximum value of the magnetic flux density was measured after being set as a vertical product. The results are shown in Fig. 15. The integrated value of the magnetic flux density was measured in a state of being a horizontal product, and thereafter, the integrated value of the magnetic flux density was measured after being set as a vertical product. The results are shown in Fig. 16. In addition, in each of FIGS. 15 and 16, the vertical axis represents the frequency and the horizontal axis represents the magnetic flux density.

As is apparent from the results shown in Fig. 15, when the maximum value of the magnetic flux density is measured, there is a case where the horizontal and vertical products are less likely to have a difference in magnetic flux density. On the other hand, it is known that when measuring the integral value of the magnetic flux density, the horizontal product and the vertical product are liable to cause a difference in magnetic flux density. From this result, it is understood that the direction of the laminated ceramic capacitor can be accurately identified by using the integral value of the magnetic flux density.

In the present experimental example, the size of the multilayer ceramic capacitor was set to 1 mm × 0.5 mm × 0.5 mm, and the internal electrode was set to an electrode mainly composed of nickel, and the internal electrode was laminated. The number was set to 40 layers, and the capacitance of the multilayer ceramic capacitor was set to 0.1 μF.

(Sixth embodiment)

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

As shown in FIG. 17, the linear feeder 51 supplies the laminated ceramic capacitor 1 to the rotary transfer apparatus 52. The transport device 52 transports the multilayer ceramic capacitor 1 to the carrier tape 53. The conveyance device 52 includes a disk-shaped transfer table 54 that rotates around the center axis C, and a transfer stage 71 on which the transfer table 54 is placed (see FIG. 18). As shown in Fig. 17, in the linear feeder 51, a magnetic generating device 60 for generating magnetism is provided, and the laminated ceramic capacitor 1 is magnetized before the multilayered ceramic capacitor 1 passes through the magnetic generating device 60. The magnetic generating device 60 also functions to rotate the laminated ceramic capacitor 1 by magnetic force to match the directions of the internal electrodes 11 and 12.

The transfer table 54 has a plurality of concave portions 54a on the outer peripheral surface, and a plurality of concave portions 54a are provided at equal intervals in the circumferential direction of the transfer table 54. The plurality of concave portions 54a extend from the outer peripheral surface of the transfer table 54 toward the central axis C, and penetrate from one main surface of the transfer table 54 to the other main surface. As shown in FIG. 18, the conveyance stage 54 is provided in the conveyance stage 71, and the conveyance stage 71 closes the lower side of the recessed part 54a.

As shown in FIG. 17, the capacitance measuring unit 75 is disposed at the position P12 of the transport path from the position P11 to the position P16. The capacitance measuring unit 75 measures the capacitance of the multilayer ceramic capacitor 1 housed in the recess 54a. The capacitance of the multilayer ceramic capacitor 1 measured is output to the control unit 73.

A magnetic flux density measuring unit constituting the direction identifying means 55 is provided at a position P13 between the position P12 and the position P16. The magnetic flux density measuring unit measures the direction of lamination of the laminated ceramic capacitor 1 and measures the magnetic flux density when the laminated ceramic capacitor 1 passes. As shown in FIG. 18, the magnetic flux density measuring section has a magnetic generating device 55a and a magnetic flux density measuring device 55b. The magnetic generating device 55a is opposed to the magnetic flux density measuring device 55b. The product carried by the transport device 52 The layer ceramic capacitor 1 passes between the magnetic generating device 55a and the magnetic flux density measuring device 55b. The transfer table 54 and the transfer stage 71 that transport the multilayer ceramic capacitor 1 are located between the magnetic generation device 55a and the magnetic flux density measuring device 55b.

When the lamination direction is perpendicular to and parallel to the arrangement direction of the magnetic generating device 55a and the magnetic flux density measuring device 55b, the magnetic flux density from the magnetic generating device 55a to the magnetic flux density measuring device 55b through the laminated ceramic capacitor 1 is different. . Therefore, the lamination direction of the laminated ceramic capacitor 1 can be identified by detecting the magnetic flux density of the laminated ceramic capacitor 1 between the magnetic generating device 55a and the magnetic flux density measuring device 55b by the magnetic flux density measuring device 55b. The magnetic flux density measuring device 55b outputs the detected magnetic flux density to the direction identifying unit, that is, the control unit 73. The control unit 73 performs an appropriate calculation process on the measured magnetic flux density to obtain, for example, the integral value of the magnetic flux density described above.

The transfer table 54 is preferably made of a non-magnetic material such as stainless steel, aluminum, plastic, or ceramic from the viewpoint of more reliably identifying the lamination direction of the multilayer ceramic capacitor 1. Further, the transfer stage 71 is preferably made of a non-magnetic material such as stainless steel, aluminum, plastic, or ceramic. Among them, the transfer table 54 and the transfer stage 71 are preferably made of zirconia which is excellent in abrasion resistance. In such cases, the magnetic flux density passing through the multilayer ceramic capacitor 1 can be measured with higher accuracy.

As shown in FIG. 17, an imaging unit 72 is provided at a position P14 between the position P13 and the position P16 in the transport path. The imaging unit 72 captures the multilayer ceramic capacitor 1 from above. The captured image is output to the control unit 73.

A sorting unit 74 is provided at a position P15 between the position P14 and the position P16 in the transport path. The sorting unit 74 is connected to the control unit 73, and sorts the multilayer ceramic capacitor 1 based on the instruction of the control unit 73. Specifically, the control unit 73 determines whether or not the electrostatic capacitance output from the capacitance measuring unit 75 is within the range of the predetermined electrostatic capacitance (the specification of the electrostatic capacitance). Further, the control unit 73 determines whether or not the lamination direction specified by the magnetic flux density coincides with the preset direction. The control unit 73 determines whether or not the multilayer ceramic capacitor 1 has an appearance defect based on the image output from the imaging unit 72. The control unit 73 identifies a laminate that does not match any of the above three conditions. The ceramic capacitor 1 is a defective product and is removed.

The arrangement of each of the capacitance measuring unit 75, the magnetic flux density measuring unit (direction identifying device 55), the imaging unit 72, and the sorting unit 74 of the present embodiment will be described more specifically. The transfer table 54 performs an intermittent operation in which the rotational motion and the stop are repeated at regular intervals. The positions of the electrostatic capacitance measuring unit 75, the imaging unit 72, and the sorting unit 74 are overlapped with the position of the concave portion 54a when the transfer table 54 is stopped. On the other hand, the position of the magnetic flux density measuring unit overlaps with the position at which the concave portion 54a passes during the rotational movement of the transfer table 54.

In other words, when the position of each of the capacitance measuring unit 75, the imaging unit 72, and the sorting unit 74 overlaps with the position of the concave portion 54a, the position of the magnetic flux density measuring unit (direction identifying device 55) and the position of the concave portion 54a. Did not overlap. On the other hand, when the position of the magnetic flux density measuring unit (direction identifying device 55) overlaps with the position of the concave portion 54a, the position of each of the capacitance measuring unit 75, the imaging unit 72, and the sorting unit 74 and the position of the concave portion 54a are not overlapping.

In addition, the position of each of the capacitance measuring unit 75, the imaging unit 72, the sorting unit 74, and the magnetic flux density measuring unit overlaps with the position of the concave portion 54a, and means the capacitance measuring unit in the circumferential direction of the transfer table 54. 75. The center of each of the imaging unit 72, the sorting unit 74, and the magnetic flux density measuring unit partially overlaps one of the recesses 54a.

For example, when the N transfer portions 54a are arranged at equal intervals on the transfer table 54 and the transfer operation is repeated (360/N) degrees, the capacitance measuring unit 75, the imaging unit 72, and the sorting unit are performed. The position of each of the 74 is an integral multiple of the rotation center offset (360/N) of the transfer table 54. On the other hand, the position of the magnetic flux density measuring unit is not the same as the position of an integral multiple of the arrangement offset (360/N) of each of the capacitance measuring unit 75, the imaging unit 72, and the sorting unit 74.

In any of the first to sixth embodiments described above, the interval between the adjacent multilayer ceramic capacitors 1 affects the recognition accuracy of the stacking direction. The lamination direction is recognized by capturing the magnetic flux density when the multilayer ceramic capacitor 1 passes through the magnetic flux density measuring portion. Therefore, if the interval between adjacent multilayer ceramic capacitors 1 is too narrow, the magnetic flux density will Influenced by the adjacent laminated ceramic capacitor 1, the recognition accuracy of the stacking direction is lowered.

Therefore, it is preferable that the interval between the adjacent multilayer ceramic capacitors 1 is 1/2 or more of the size of the magnetic generating device 55a in the passing direction of the multilayer ceramic capacitor 1. Alternatively, it is preferable that the interval between the adjacent multilayer ceramic capacitors 1 is equal to or larger than the size of the multilayer ceramic capacitor 1 in the direction in which the multilayer ceramic capacitor 1 passes.

In the first to sixth embodiments described above, the magnetic generating device 31 is disposed opposite to the magnetic flux density measuring device 32, and the laminated ceramic capacitor 1 is passed between them, and the seventh embodiment to be described later is described. The configuration of the magnetic generating device 31 and the magnetic flux density measuring device 32 is different.

(Seventh embodiment)

As shown in Fig. 19, a magnetic generating device 60 for generating magnetism is provided in the linear feeder 51. The laminated ceramic capacitor 1 is magnetized before the multilayer ceramic capacitor 1 passes through the magnetic generating device 60. The laminated ceramic capacitor 1 is magnetized, meaning that the multilayer ceramic capacitor is brought into a magnetic state.

Further, the magnetic generating device 60 has a function of matching the directions of the internal electrodes 11 and 12 of the multilayer ceramic capacitor 1 conveyed by the linear feeder 51. For example, when the lamination direction of the internal electrodes 11 and 12 of the multilayer ceramic capacitor 1 is parallel to the horizontal direction, the magnetic force generated by the self-magnetic generating device 60 is made such that the lamination direction of the internal electrodes 11 and 12 is parallel to the vertical direction. The multilayer ceramic capacitor 1 is rotated by 90°. Thereby, the direction of the multilayer ceramic capacitor 1 passing through the portion where the magnetic generating device 60 is provided is made uniform. However, it is not necessary to make the directions of all the laminated ceramic capacitors 1 uniform.

A magnetic generating device 55a is disposed at a position P2 between the position P1 and the position P3 in the transport path. The multilayer ceramic capacitor 1 is further magnetized by the magnetic generating device 55a. Therefore, the magnetized multilayer ceramic capacitor 1 is housed in the multilayer ceramic capacitor group 2. Furthermore, in the present embodiment, the magnetic generating device 55a and the magnetic generating device are provided. An example of two magnetic generating devices of 60 will be described. However, the present invention is not limited to this configuration. It is also possible to provide only one magnetic generating device.

As shown in Fig. 20, below the multilayer ceramic capacitor group 2, a magnetic flux density measuring device 32 for measuring magnetic flux density is provided. Specifically, the magnetic flux density measuring device 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 magnetic generating devices 55a and 60 (magnetization step). Next, the magnetic flux density measuring device 32 measures the density of the magnetic flux generated by the magnetized multilayer ceramic capacitor 1 (magnetic flux density measuring step). In the magnetic flux density measuring step, it is preferable to measure the magnetic flux density of the magnetized multilayered ceramic capacitor 1 before passing through the magnetic flux density measuring device 32.

Next, the direction identifying unit 36 identifies the stacking direction of the internal electrodes 11 and 12 of the multilayer ceramic capacitor 1 based on the measurement result of the magnetic flux density (the stacking direction identifying step). The direction of the laminated ceramic capacitor 1 can be identified based on the maximum value or integrated value of the magnetic flux density measured at this time. As a result, for example, when the multilayer ceramic capacitor 1 is detected, or when the multilayer ceramic capacitor 1 in which the direction of the multilayer ceramic capacitor 1 is different from the desired direction is detected, the laminated ceramic capacitor 1 is marked or removed. The multilayer ceramic capacitor 1.

The principle of the direction identifying method of the present embodiment will be described with reference to Figs. 21 and 22 . When the build-up ceramic capacitor 1 is not present before the magnetic flux density measuring device 32, substantial magnetic flux measurement is not performed by the magnetic flux density measuring device 32. On the other hand, as shown in FIGS. 21 and 22, when the magnetized multilayer ceramic capacitor 1 is placed in front of the magnetic flux density measuring device 32, the magnetic lines of force from the laminated ceramic capacitor 1 pass through the magnetic flux density measuring device 32. Therefore, the magnetic flux can be measured by the magnetic flux density measuring device 32. As a result, as shown in FIGS. 9 and 10, depending on the lamination direction of the multilayer ceramic capacitor 1, the maximum value and the integral value of the magnetic flux density are also different.

In the present embodiment, since the multilayer ceramic capacitor 1 has been magnetized in advance, it is not necessarily required. The magnetic generating devices 55a and 60 are disposed opposite to the magnetic flux density measuring device 32. Therefore, the degree of freedom in arrangement of the magnetic generating devices 55a, 60 and the magnetic flux density measuring device 32 is increased, and the structural limitations of the direction identifying device and the manufacturing device are thus reduced. Therefore, for example, the direction identifying device and the manufacturing device can be miniaturized. Further, after the direction identification of the multilayer ceramic capacitor 1 is performed, the positively magnetized multilayer ceramic capacitor 1 may be subjected to demagnetization treatment.

(Eighth and ninth embodiments)

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

In the seventh embodiment, an example in which the direction of the multilayer ceramic capacitor 1 accommodated in the multilayer ceramic capacitor group 2 is recognized by the magnetic flux density measuring device 32 will be described. However, the invention is not limited thereto.

For example, as shown in FIG. 23, the magnetic flux density measuring device 32 may be provided in the conveying device 52. Specifically, in the eighth embodiment, the magnetic flux density measuring device 32 is disposed at the position P4 of the conveying device 52. Further, for example, as shown in the ninth embodiment shown in Fig. 24, the magnetic flux density measuring device 32 may be provided in the linear feeder 51. Therefore, the direction of the laminated ceramic capacitor 1 can be recognized during the conveyance by the transport device 52 before being stored in the multilayer ceramic capacitor group 2.

In the eighth and ninth embodiments, a sorting unit for sorting the multilayer ceramic capacitor 1 in which the direction of the laminated ceramic capacitor 1 is not in the desired lamination direction may be further provided between the position P4 and the position P3; And an entire column that rotates the laminated ceramic capacitor 1 to set it in a desired lamination direction. The sorting unit may be one in which the lamination direction of the internal electrodes 11 and 12 is not the desired multilayer ceramic capacitor 1.

(Experimental Example 2) (Example 1)

Six laminated ceramic capacitors having the following design parameters were prepared. As shown in Figure 19, only The magnetic generation device 60 of the pair of permanent magnets opposed to the pair of linear magnets 51 is magnetized by the laminated ceramic capacitor. Furthermore, three of the six samples were arranged with the internal electrodes in parallel with the magnetic flux density measuring device, and the magnetic flux density was measured, and the other three were arranged such that the internal electrodes were perpendicular to the magnetic flux density measuring device, and The magnetic flux density was measured. The maximum value of the measured magnetic flux density is shown in Table 1. In Table 1, the sample described as "horizontal" was placed so that the internal electrode was parallel to the magnetic flux density measuring instrument, and the sample of the magnetic flux density was measured. In Table 1, the sample described as "vertical" is arranged such that the internal electrode is perpendicular to the magnetic flux density measuring instrument, and the sample of the magnetic flux density is measured.

(Example 2)

The demagnetization of the multilayer ceramic capacitor was carried out so that the magnetic flux density of the six multilayer ceramic capacitors used in the first embodiment was 0.05 mT or less, and this was again used as a sample in the second embodiment. In the second embodiment, the magnetic generating device 60 having the same configuration as that of the first embodiment and the two magnetic generating devices of the magnetic generating device 55a provided in the transfer device 52 and composed of permanent magnets are laminated. magnetization. Three of the six samples were arranged such that the internal electrodes were parallel to the magnetic flux density measuring device, and the magnetic flux density was measured, and the other three were arranged such that the internal electrodes were perpendicular to the magnetic flux density measuring device, and were measured. Magnetic flux density. The maximum value of the measured magnetic flux density is shown in Table 1.

In the present experimental example, the size of the multilayer ceramic capacitor was set to 1.15 mm × 0.65 mm × 0.65 mm, and the internal electrode was an electrode mainly composed of nickel, and the number of layers of the internal electrode was 430, and the layer was laminated. The electrostatic capacitance of the ceramic capacitor was set to 10 μF.

As is apparent from the results shown in Table 1, the direction of the laminated ceramic capacitor can be identified by measuring the magnetic flux density of the multilayered ceramic capacitor which has been previously magnetized. Further, by performing magnetization twice as in the second embodiment, the measured value (maximum value and integral value) of the magnetic flux density of the multilayer ceramic capacitor is increased, and direction recognition is also easier.

The embodiments of the present invention have been described, but it is understood that all aspects of the embodiments disclosed herein are illustrative and not restrictive. The scope of the present invention is intended to be embraced by the appended claims

2‧‧‧Multilayer Ceramic Capacitor Bank

3‧‧‧ Directional identification device for laminated ceramic capacitors

31‧‧‧Magnetic generating device

32‧‧‧Magnetic density measuring device

33‧‧‧1st roller

34‧‧‧2nd roller

35‧‧‧Transporting device

36‧‧‧ Direction Identification Department

Claims (16)

A method for identifying a direction of a multilayer ceramic capacitor, which is a method for identifying a lamination direction of a multilayer ceramic capacitor including a plurality of laminated internal electrodes, comprising the steps of: transporting a plurality of laminated ceramic capacitors to a magnetic generating device and a magnetic body Before each of the plurality of multilayered ceramic capacitors, the magnetic flux density is measured by the magnetic flux density measuring device before each of the plurality of multilayer ceramic capacitors passes through the magnetic flux density measuring device; and the step of measuring the magnetic flux density based on the magnetic flux density measuring device The above-mentioned layering direction is identified by the above-described magnetic flux density measured in the above. The direction identifying method of the multilayer ceramic capacitor according to claim 1, wherein in the step of identifying the laminated direction, the integrated value of the magnetic flux density is calculated based on the magnetic flux density measured in the step of measuring the magnetic flux density, based on the above The integration value of the magnetic flux density is used to identify the above laminated direction. The method of identifying a direction of a multilayer ceramic capacitor according to claim 1, wherein said magnetic generating means and said magnetic flux density measuring device are opposite to each other; and in said step of measuring said magnetic flux density, said plurality of laminated ceramic capacitors When passing between the magnetic generating means and the magnetic flux density measuring instrument, the density of the magnetic flux generated from the magnetic generating means is measured by the magnetic flux density measuring device. The direction identifying method of the multilayer ceramic capacitor according to claim 1, wherein the magnetic generating device is disposed on a further upstream side of the transport direction of the plurality of laminated ceramic capacitors than the magnetic flux density measuring device; and the direction identifying method of the laminated ceramic capacitor Further comprising the steps of: said plurality of laminated ceramic capacitors before said step of measuring said magnetic flux density Each of the devices is magnetized. The direction identifying method of the multilayer ceramic capacitor according to any one of claims 1 to 4, wherein, in the step of transporting the plurality of multilayer ceramic capacitors, the plurality of laminated ceramic capacitors are transported by the linear transport path In the step of measuring the magnetic flux density, the magnetic flux density is measured by the magnetic flux density measuring device before the plurality of laminated ceramic capacitors pass the magnetic flux density measuring device along the linear transport path. The direction identifying method of the multilayer ceramic capacitor according to any one of claims 1 to 4, wherein in the step of transporting the plurality of laminated ceramic capacitors, the plurality of laminated ceramic capacitors are housed in the outer circumference of the circular rotating body In the step of measuring the magnetic flux density, the plurality of laminated ceramic capacitors are passed through the magnetic flux density measuring device in a state of being accommodated in each of the plurality of housing portions. Previously, the magnetic flux density was measured by the above magnetic flux density measurer. The direction identifying method of the multilayer ceramic capacitor according to any one of claims 1 to 4, wherein, in the step of transporting the plurality of laminated ceramic capacitors, the plurality of laminated ceramic capacitors are accommodated in the package In the step of measuring the magnetic flux density, in the step of measuring the magnetic flux density, when the plurality of multilayer ceramic capacitors are placed in the state of each of the plurality of cavities before passing through the magnetic flux density measuring device, The magnetic flux density measurer measures the magnetic flux density. A method of manufacturing a multilayer ceramic capacitor bank, comprising the steps of: recognizing the lamination direction by a direction identification method of a multilayer ceramic capacitor according to any one of claims 1 to 4; and accommodating a plurality of laminated ceramic capacitors having the same lamination direction In the package Each of the plurality of cavities set in the individual. A direction identifying device for a laminated ceramic capacitor, which is a direction identifying device for identifying a lamination direction of a multilayer ceramic capacitor including a plurality of laminated internal electrodes; comprising: a magnetic generating device; a magnetic flux density measuring device; and a conveying device, which will have a column a plurality of laminated ceramic capacitors are transferred to each of the magnetic generating device and the magnetic flux density measuring device; and a direction identifying portion connected to the magnetic flux density measuring device and based on the magnetic quantity measured by the magnetic flux density measuring device The above laminated direction is identified by the density. The direction identifying device of the multilayer ceramic capacitor of claim 9, wherein the direction identifying portion calculates an integral value of the magnetic flux density based on the magnetic flux density measured by the magnetic flux density measuring device, and based on the magnetic flux density The above-mentioned stacking direction is identified by the integral value. The direction identifying device of the multilayer ceramic capacitor according to claim 9, wherein the magnetic generating device and the magnetic flux density measuring device are opposite to each other; and the magnetic flux density measuring device is connected to the plurality of laminated ceramics conveyed by the conveying device Each of the capacitors measures the density of the magnetic flux generated from the magnetic generating device when passing between the magnetic generating device and the magnetic flux density measuring device. The direction identifying device of the multilayer ceramic capacitor according to claim 9, wherein the magnetic generating device is disposed on a further upstream side of the transport direction of the plurality of laminated ceramic capacitors than the magnetic flux density measuring device; and the magnetic generating device is coupled to the magnetic device Each of the plurality of laminated ceramic capacitors is magnetized before the density measuring device measures the magnetic flux density. The direction identifying device for a multilayer ceramic capacitor according to any one of claims 9 to 12, wherein the transfer device includes a line type transfer path, and the laminated ceramic capacitor is The device is transported in a straight line; and the magnetic flux density measuring device is disposed on the linear transport path. The direction identifying device for a multilayer ceramic capacitor according to any one of claims 9 to 12, wherein the conveying device comprises a circular rotating body that conveys the laminated ceramic capacitor along a circular arc; and the rotating body includes a plurality of housing portions And the like is disposed along the outer circumference of the rotating body, and accommodates the plurality of laminated ceramic capacitors one by one; the magnetic flux density measuring device is disposed on the rotating body. The direction identifying device for a multilayer ceramic capacitor according to any one of claims 9 to 12, wherein the transfer device transports a package including a plurality of cavities of the plurality of laminated ceramic capacitors one by one; and the package passes the magnetic flux Before the density measurer. The direction identifying device of the multilayer ceramic capacitor of claim 14, wherein the rotating system repeatedly performs a rotational motion and a stop at a fixed interval; and each of the plurality of accommodating portions passes the magnetic flux density measurement during a rotational movement of the rotating body Before the device, and stopped at a position that does not overlap with the above-mentioned magnetic flux density measuring device.