JP2019057614A - Laminated coil component, manufacturing method for laminated coil component, and inspection system for laminated coil component - Google Patents

Abstract

To implement a laminated coil component and a manufacturing method therefor that make it possible to easily perform component type identification using only an appearance inspection and form a marker without requiring print processing, and an inspection system capable of efficiently performing a component type inspection on the laminated coil component using only an appearance thereof.SOLUTION: An internal electrode 1 is embedded in a component element 2 and a pair of external electrodes 3a, 3b are formed on both ends of the component element 2. The component element 2 is composed of first insulation layers 4a to 4f and second insulation layers 5a to 5c having a color tone differing from that of the first insulation layers 4a to 4f. Surfaces of the first insulation layers 4a to 4f and the second insulation layers 5a to 5c are exposed on both opposing side surfaces of four side surfaces of the component element 2. The first insulation layers 4a to 4f and the second insulation layers 5a to 5c are manufactured using a sheet method. Component type selection is performed by: arranging the posture of a laminated coil component so that both side surfaces are top surfaces; and recognizing patterns of the second insulation layers 5a to 5c.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laminated coil component, a laminated coil component manufacturing method, and a laminated coil component inspection system, and more particularly, a laminated coil component capable of easily selecting a product type, a manufacturing method thereof, and characteristics of the laminated coil component. The present invention relates to an inspection system for laminated coil components that performs sorting.

  Today, chip-type multilayer coil components such as multilayer inductors are widely used in various electronic devices and are widely spread.

  Many of these types of multilayer coil parts have substantially the same external dimensions, and even if they are sorted only by characteristics such as the DC resistance and inductance of the finished product, the characteristics and characteristics of similar parts may partially overlap. In addition, since the measurement accuracy is also difficult, there is a possibility that a product with a specification different from the desired specification product is mixed in the final product to be shipped.

  Therefore, conventionally, a marker is previously given to a predetermined part of a laminated coil component, and the product is selected by imaging the marker with a camera or the like in a production line inspection process.

  As a multilayer coil component in which a marker is added to a product, for example, Patent Document 1 proposes a multilayer inductor as shown in FIG.

  That is, in Patent Document 1, the inner conductor 101 is formed in a coil shape by stacking, and a starting end and a terminal end of the inner conductor 101 are formed to form a pair of lead conductors 102a and 102b, and these lead conductors 102a, A multilayer inductor is proposed in which 102b is derived from each other and connected to external electrodes 103a and 103b, and markers 104a and 104b indicating the positions of the lead conductors 102a and 102b are formed on the surface.

  In Patent Document 1, markers 104a and 104b are printed and formed at predetermined positions so as to be symmetric with respect to one axis of a component body (chip body) 105, thereby recognizing the directionality of the multilayer inductor.

  Further, in Patent Document 2, as shown in FIG. 13, a spiral coil conductor (not shown) is formed in a rectangular parallelepiped component body (chip) 111 obtained by laminating and firing a large number of sheet layers. The marker layers 112 and 113 for indicating the position of the lead portion of the coil conductor are respectively provided on the inner side of the upper surface side sheet layer and the inner surface of the lower surface side sheet layer constituting the chip. A rectangular shape having the same width as the component element body 111 is formed, and two sides 112a, 112b, 113a, 113b on the side surface side of the component element body 111 of each marker layer 112, 113 are two side surfaces of the component element body 111. In addition, there has been proposed a multilayer inductor in which one side 112c, 113c on the end face side of the component element body 111 is located on the inner side with a predetermined distance from the end face of the component element body 111.

  In this Patent Document 2, a marker layer is printed on a sheet layer on the inner side of an extremely thin upper and lower outer layer sheet, and the marker layers 112 and 113 are embedded in a component body 111 so that the marker layers 112 and 113 are transparent. This makes it possible to recognize the direction of the multilayer inductor without causing the marker layers 112 and 113 to peel off or scatter.

Japanese Patent No. 3359802 (Claim 1, FIG. 1, etc.) Japanese Patent Laying-Open No. 2005-166745 (Claim 1, paragraph [0024], FIG. 1, 3 etc.)

  However, in Patent Documents 1 and 2, since the markers 104a and 104b or the marker layers 112 and 113 are both formed by printing, a printing paste and a printing process for preparing the marker are required, and the manufacturing process becomes complicated. There is a fear.

  In addition, in the case of a relatively simple marker such as a marker for direction recognition, it can be easily formed by the methods of Patent Documents 1 and 2, but it is possible to identify a variety of small and many types of laminated coil parts. When performing the above, various different types of markers are required, and an increase in marker variation is required.

  However, when trying to increase the number of marker variations by printing technology as in Patent Documents 1 and 2, fine and advanced processing technology is required, the processing difficulty is high, and it is put into practical use in consideration of mass productivity and cost. It is difficult.

  In addition, when the markers 104a and 104b are printed and formed on the surface of the component body 105 as in Patent Document 1, the markers 104a and 104b may disappear or be lost if barrel processing is performed after firing. Furthermore, in order to form the marker 104b on the lower surface side, it is necessary to print the marker 104b by inverting the component body 105, which may make the manufacturing process more complicated.

  The present invention has been made in view of such circumstances, and a laminated coil component capable of easily identifying a product type only by appearance inspection, and a laminated coil component capable of forming a marker without requiring printing. It is an object of the present invention to provide a method for manufacturing a multilayer coil component and an inspection system for a multilayer coil component that can efficiently inspect the type of the multilayer coil component only by appearance.

  In order to achieve the above object, in the multilayer coil component according to the present invention, internal electrodes are embedded in a component body in which a plurality of insulating layers are stacked, and external electrodes are formed at both ends of the component body. In the laminated coil component, the insulating layer includes a first insulating layer and a second insulating layer having a color different from that of the first insulating layer, and the first and second insulating layers. Is characterized in that the surface is exposed on both opposing side surfaces of the component element body.

  As a result, the marker can be formed with the pattern of the second insulating layer, and the type can be easily identified by recognizing the type of the marker.

  In the present invention, by varying the form of the second insulating layer, various marker modes can be realized, and multilayer coil parts with abundant marker variations can be obtained.

  That is, in the laminated coil component of the present invention, it is preferable that a plurality of the second insulating layers having different thicknesses are laminated via the first insulating layer. In this case, the thick second insulating layer is provided. The layer is preferably formed by integrating a plurality of thin second insulating layers adjacent to each other in the stacking direction.

  As a result, a striped pattern is formed on the opposite side surfaces of the second insulating layer. By associating the thickness and number of the second insulating layer with the type of the laminated coil component, the type of the laminated coil component Can be easily selected.

  Furthermore, in the laminated coil component according to the present invention, the second insulating layer is divided into two or more layers, and an insulating material for forming the first insulating layer is filled in the divided gap. It is also preferable.

  This also makes it possible to easily select various types of laminated coil components by changing the parting location or combining the second insulating layers having different thicknesses described above and associating them with each type of laminated coil components. It becomes.

  In the multilayer coil component of the present invention, it is preferable that the second insulating layer has a protrusion and is exposed on the surface. In this case, the protrusion is formed in a convex shape. preferable.

  This also makes it possible to change the division location, or combine the second insulating layer having a different thickness and the second insulation layer having the division location described above and associate them with each type of laminated coil component, thereby providing a variety of laminated coils. The type of parts can be easily selected.

  Further, in the multilayer coil component of the present invention, the second insulating layer is composed of two or more layers having the same or substantially the same thickness, and each of the second insulating layers includes two layers. It is also preferable that the insulating material for forming the first insulating layer is filled in the divided gap as described above.

  As a result, for example, by forming a large number of divided portions on both opposite sides of the component body in a staggered manner and associating them with the types of laminated coil components, the variation of the marker can be further increased. Thus, it is possible to easily sort the laminated coil components.

  In the multilayer coil component of the present invention, it is preferable that the first insulating layer is made of a magnetic material and the second insulating layer is made of a glass-based material.

  As a result, the magnetic material exhibits a black color and the glass material exhibits a transparent color. By using these magnetic material and glass material, the second insulating layer has a different color from the first insulating layer. Can be realized.

  The method for manufacturing a laminated coil component according to the present invention includes a step of producing a plurality of insulating sheets including a first insulating sheet and a second insulating sheet having a color different from that of the first insulating sheet; Applying a conductive paste to the first insulating sheet to form a conductive pattern; laminating the plurality of insulating sheets to form a laminated body block; and separating the laminated body block into pieces. The method includes a step of producing a laminated molded body so that both side surfaces are exposed, and a step of firing the laminated molded body to produce a component body.

  This makes it possible to easily obtain a laminated coil component in which various different patterns are formed on opposite side surfaces without requiring a fine printing technique.

  In the method of manufacturing a laminated coil component of the present invention, the step of forming the laminated body block includes laminating the plurality of insulating sheets so that two or more second insulating sheets are adjacent to each other in the laminating direction. Is preferred.

  Further, in the method for manufacturing a laminated coil component according to the present invention, when the laminated body block is divided into pieces, both opposing side surfaces of the second insulating sheet form semicircular cutout portions. It is preferable that a hole is formed in the second insulating sheet so that the material for forming the first insulating sheet is filled in the second insulating sheet.

  Furthermore, in the method for manufacturing a laminated coil component according to the present invention, when the laminated body block is divided into individual pieces, both opposing side surfaces of the first insulating sheet form semicircular cutout portions. It is also preferable to form a hole in the first insulating sheet so that the material for forming the second insulating sheet is filled in the first insulating sheet.

  Thus, when the laminated body block is separated into pieces, both opposing side surfaces of the first insulating sheet or the second insulating sheet form a semicircular cutout, and the second insulation is formed in the cutout. By forming holes in the second insulating sheet or the first insulating sheet in advance so that the material for forming the sheet or the first insulating sheet is filled, various patterns for product identification are formed on both sides. The laminated coil component can be easily obtained.

  The inspection system for a laminated coil component according to the present invention is such that the exposed surface of the first and second insulating layers constituting the laminated coil component according to any one of the above is positioned on a specific surface. After adjusting the posture, the pattern formed by the second insulating layer is recognized, and the characteristics of the laminated coil component are selected based on the recognition result.

  According to the multilayer coil component of the present invention, there is provided a multilayer coil component in which internal electrodes are embedded in a component body in which a plurality of insulating layers are stacked, and external electrodes are formed at both ends of the component body. The insulating layer includes a first insulating layer and a second insulating layer having a color different from that of the first insulating layer, and the first and second insulating layers include the component element body. Since the surface of the second insulating layer is exposed on both sides facing each other, the pattern of the second insulating layer forms a marker, so the form of the second insulating layer (number, thickness, formation of divided portions, protrusions, etc.) The types of the laminated coil components can be easily identified by associating the second insulating layer with the types of the laminated coil components.

  According to the method for manufacturing a laminated coil component of the present invention, a step of producing a plurality of insulating sheets including a first insulating sheet and a second insulating sheet having a color different from that of the first insulating sheet; Applying a conductive paste to the first insulating sheet to form a conductive pattern; laminating the plurality of insulating sheets to form a laminated body block; separating the laminated body block; The method includes a step of producing a laminated molded body so that both side surfaces are exposed, and a step of firing the laminated molded body to produce a component body. It is possible to easily obtain laminated coil components having various different patterns.

  According to the laminated coil component inspection system of the present invention, the laminated coil is arranged such that the surface exposed surfaces of the first and second insulating layers constituting the laminated coil component according to any one of the above-described ones are positioned on a specific surface. After the orientation of the component is adjusted, the pattern formed by the second insulating layer is recognized, and the type of the laminated coil component is selected based on the recognition result, so that the second insulation is formed on both side surfaces of the component element body. Since the layer is exposed on the surface, even if the posture of the laminated coil component is randomly conveyed, the posture can be adjusted only by turning 90 ° clockwise or counterclockwise. By recognizing and selecting the pattern of the insulating layer, it is possible to efficiently select the type of small and many types of laminated coil parts.

1 is a front view schematically showing one embodiment (first embodiment) of a laminated coil component according to the present invention. It is a principal part disassembled perspective view for demonstrating the manufacturing method of the laminated coil component which concerns on 1st Embodiment. It is a front view which shows typically 2nd Embodiment of the laminated coil component which concerns on this invention. It is a principal part disassembled perspective view for demonstrating the manufacturing method of the laminated coil component which concerns on 2nd Embodiment. It is a front view which shows typically 3rd Embodiment of the laminated coil component which concerns on this invention. It is a principal part disassembled perspective view for demonstrating the manufacturing method of the laminated coil component which concerns on 3rd Embodiment. It is a front view which shows typically 4th Embodiment of the laminated coil component which concerns on this invention. It is a principal part disassembled perspective view for demonstrating the manufacturing method of the laminated coil component which concerns on 4th Embodiment. 1 is a system configuration diagram showing an embodiment of a laminated coil component inspection system according to the present invention. It is explanatory drawing for demonstrating the principal part of the test | inspection procedure of the laminated coil components of this invention. It is explanatory drawing for demonstrating the principal part of the test | inspection procedure of the conventional laminated coil components. 1 is a perspective view of a laminated coil component described in Patent Document 1. FIG. It is a perspective view of the multilayer coil component described in Patent Document 2.

  Next, an embodiment of the present invention will be described in detail.

  FIG. 1 is a front view schematically showing one embodiment (first embodiment) of a laminated coil component according to the present invention.

  In this laminated coil component, an internal electrode 1 made of a straight coil is embedded in a component element body 2, and a pair of external electrodes 3 a and 3 b are formed at both ends of the component element body 2.

  Specifically, the component body 2 includes a plurality of insulating layers including first insulating layers 4a to 4f and second insulating layers 5a to 5c having different colors from the first insulating layers 4a to 4f. The first insulating layers 4a to 4f and the second insulating layers 5a to 5c are exposed on the opposite side surfaces of the four side surfaces of the component body 2. Yes. In the first embodiment, the striped pattern formed by the second insulating layers 5a to 5c acts as a marker, and the both side surfaces form marker surfaces 9a and 9b.

  That is, in the first embodiment, the second insulating layers 5a to 5c have the same or substantially the same thickness, and the second insulating layer 5b and the second insulating layer 5c are adjacent to each other in the stacking direction. Thus, a second insulating layer 5d having a thickness larger than that of the second insulating layer 5a is formed. The second insulating layer 5a is sandwiched between the first insulating layer 4a and the first insulating layer 4b, and the second insulating layer 5d thicker than the second insulating layer 5a is the first insulating layer 5a. It is sandwiched between the insulating layer 4b and the first insulating layer 4c. As a result, the second insulating layer 5a and the second insulating layer 5d are formed with striped patterns having different thicknesses, and by associating such a pattern with the type of the laminated coil component, the desired laminated coil component and desired pattern can be obtained. It is possible to sort out laminated coil parts other than the specification.

  As described above, in the first embodiment, the first insulating layers 4a to 4f and the second insulating layers 5a and 5d having different colors from the first insulating layers 4a to 4f are formed on the component body 2. Since the second insulating layer 5a and the second insulating layer 5d have different thicknesses, the striped patterns drawn by the second insulating layers 5a and 5d are recognized. Thus, it is possible to select the type of the laminated coil component associated with the pattern, and it is possible to avoid as much as possible that the laminated coil component other than the desired specification is mixed in the final product.

  Here, as materials having different colors, black magnetic materials can be preferably used for the first insulating layers 4a to 4f, and transparent materials can be used for the second insulating layers 5a to 5c. Glass-based materials can be used with preference.

As the magnetic material, for example, Fe ₂ O ₃ is 40 to 49.5 mol%, ZnO is 5 to 35 mol%, CuO is 6 to 12 mol%, and the balance is Ni—Zn—C made of an additive containing NiO and inevitable impurities. Ferritic ferrite materials can be used with preference.

As the glass-based material, for example, SiO ₂ is _70~85wt%, B 2 _{O 3} uses 10~25wt%, _Al 2 _{O 3} and _{K 2} O is less borosilicate glass-based material 5 wt%, respectively It is more preferable to add an appropriate amount of quartz, forsterite, or alumina as a filler component.

  Next, the manufacturing method of the said laminated coil component is explained in full detail about the case where a magnetic material is used for the 1st insulating layers 4a-4f and a glass-type material is used for the 2nd insulating layers 5a and 5d.

First, a magnetic material is produced. That is, ferrite raw materials such as Fe ₂ O ₃ , NiO, ZnO, and CuO are prepared. Next, after weighing a predetermined amount of this ferrite raw material, it is put into a pot mill together with a grinding medium such as PSZ (partially stabilized zirconia) balls, thoroughly mixed and pulverized in a wet manner, dried, and then at a temperature of about 700 ° C. Calcination is performed for 2 hours to obtain a ferrite powder.

  Next, the ferrite powder is put into a pot mill together with an organic binder such as polyvinyl butyral, an organic solvent such as ethanol and / or toluene, and the above pulverization medium, and sufficiently mixed and pulverized, thereby producing a slurry-like magnetic material. .

Next, a glass-based material is produced. That _is, providing a _{SiO 2, B 2 O 3,} Al 2 O 3, glass raw materials of _{K 2} O or the like. Next, after a predetermined amount of this glass raw material is weighed, this weighed product is put into a platinum crucible and melted at a temperature of about 1500 to 1600 ° C. to prepare a glass melt, and then the glass melt is rapidly cooled. Thereafter, it is pulverized to obtain glass powder.

  Next, if necessary, a filler component such as forsterite is added to the glass powder, and the mixture is added to a pot mill together with an organic binder such as polyvinyl butyral, an organic solvent such as ethanol and / or toluene, and the above grinding media. Then, a slurry-like glass-based material is produced.

  FIG. 2 is an exploded perspective view of a laminated molded body that is an intermediate product of the laminated coil component.

  In the present embodiment, a large-sized laminated body block is produced, and a laminated molded body is produced by a multi-cavity method in which the laminated body block is separated into individual pieces. The laminated molded body is illustrated.

  That is, the slurry-like magnetic material is molded using a doctor blade method or the like to produce magnetic sheets (first insulating sheets) 6a to 6f having a thickness of 15 to 60 μm.

  Next, a conductive paste mainly composed of Ag or the like is prepared, and using this conductive paste, screen printing or the like is performed on the magnetic sheet 6d to produce a linear conductive pattern 7.

  Moreover, it shape | molds using the doctor blade method etc. with respect to the said slurry-like glass-type material, and produces the glass sheet (2nd insulating sheet) 8a-8c whose thickness is 15-60 micrometers.

  Next, the glass sheet 8a is sandwiched between the magnetic sheet 6a and the magnetic sheet 6b, the glass sheet 8b and the glass sheet 8c are sandwiched between the magnetic sheet 6b and the magnetic sheet 6c, and the magnetic sheet 6d is Laminate magnetic sheets 6a to 6f and glass sheets 8a to 8c so as to be sandwiched between magnetic sheet 6c and magnetic sheet 6e, and produce a laminated block by heating and pressurizing. To obtain a laminated molded body.

  Next, this laminated molded body is accommodated in a firing furnace and subjected to a firing treatment at a temperature of about 900 ° C. for 2 hours. Thereafter, the surface of the laminated molded body is polished by barrel polishing or the like, and processed so that the corners have an R shape. In this way, the component body 2 in which the internal electrode 1 made of a straight coil is embedded is manufactured.

  Thereafter, a conductive paste mainly composed of Ag or the like is prepared, and the conductive paste is applied to both ends of the component body 1 and subjected to a baking treatment at about 800 ° C. to form a base electrode. Are used to form the external electrodes 3a and 3b having a three-layer structure having a Ni or Sn film on the base electrode, whereby the laminated coil component of the first embodiment is manufactured.

  As described above, the manufacturing method includes the steps of producing the magnetic sheets 6a to 6f and the glass sheets 8a to 8c having different colors from the magnetic sheets 6a to 6f, and the conductive paste on the magnetic sheet 6d. A step of applying and forming the conductive pattern 7; a step of laminating the magnetic sheets 6a to 6f and the glass sheets 8a to 8c to form a laminated body block; Including a step of producing a laminated molded body so that the surface is exposed and a step of producing the component body 2 by firing the laminated molded body so that the glass sheet 8b and the glass sheet 8c are adjacent to each other in the laminating direction. Since the layers are laminated, a laminated coil component in which striped patterns having different thicknesses are formed on both opposing side surfaces can be easily obtained without requiring a fine printing technique.

  FIG. 3 is a front view schematically showing a second embodiment of the laminated coil component according to the present invention.

  In this laminated coil component, as in the first embodiment, an internal electrode 19 made of a straight coil is embedded in the component element body 11, and a pair of external electrodes 3a, 3b are provided at both ends of the component element body 11. Is formed.

  Specifically, the component body 11 includes a plurality of insulating layers including first insulating layers 12a to 12e and second insulating layers 13a and 13b having different colors from the first insulating layers 12a to 12e. The first insulating layers 12a to 12e and the second insulating layers 13a and 13b are exposed on the opposite side surfaces of the four side surfaces of the component body 11. Yes.

  Further, in the second embodiment, the second insulating layer 13b is divided into two, and the divided gap 14 is filled with an insulating member that forms the first insulating layers 12a to 12e. A pattern formed by the second insulating layers 13a and 13b acts as a marker, and the both side surfaces form marker surfaces 20a and 20b.

  In the second embodiment, as in the first embodiment, the second insulating layers 13a and 13b, which are different in color from the first insulating layers 12a to 12e, are replaced with the first insulating layers 12a to 12e. Since the surface is exposed on both side surfaces of the component body 11 together with 12e, the type can be easily recognized by recognizing the pattern of the second insulating layers 13a and 13b. Therefore, by associating the pattern with the type of laminated coil component, it is possible to easily select the laminated coil component having the desired specification and the desired specification.

  As materials having different colors, black magnetic materials can be preferably used for the first insulating layers 12a to 12e as in the first embodiment, and the second insulating layer 13a can be used. , 13b can use a transparent glass-based material.

  Next, the manufacturing method of the said laminated coil component is explained in full detail about the case where a magnetic material is used for the 1st insulating layers 12a-12e and a glass-type material is used for the 2nd insulating layers 13a and 13b.

  First, as in the first embodiment, a magnetic material and a glass material are produced.

  FIG. 4 is an exploded perspective view of a laminated molded body that is an intermediate product of the laminated coil component.

  In FIG. 4 as well, for convenience of explanation, an individual laminated molded body is shown.

  That is, similarly to the first embodiment, magnetic sheets (insulating sheets) 15a to 15e are produced, and a linear conductive pattern 16 is produced on the surface of the magnetic sheet 15d.

  Next, glass sheets 17a and 17b are produced using the slurry-like glass material. And when a laminated body block is separated into pieces, a hole is formed in the glass sheet 17b by laser irradiation or the like so that both opposing side surfaces of the glass sheet 17b have semicircular cutouts. As a result, when the laminated body block before the press-bonding process, which will be described later, is shown in a laminated molded body unit, as shown in FIG. .

  Next, the glass sheet 17a is sandwiched between the magnetic sheet 15a and the magnetic sheet 15b, the glass sheet 17b is sandwiched between the magnetic sheet 15b and the magnetic sheet 15c, and the magnetic sheet 15d is further sandwiched between the magnetic sheets 15c. The magnetic sheets 15a to 15e and the glass sheets 17a and 17b are laminated so as to be sandwiched between the magnetic sheet 15e and the laminated body block by heating and pressing. At this time, the holes are filled with a magnetic material for forming the magnetic sheets 15b and 15c by a pressure-bonding process during heating and pressurization. And this laminated body block is separated into pieces, and a laminated molded object is obtained.

  Thereafter, the component body 11 is manufactured by the same method and procedure as in the first embodiment, and further, the external electrodes 3a and 3b are formed. Thereby, the multilayer coil component of the second embodiment is manufactured. .

  As described above, also in the present manufacturing method, by forming holes in the large-sized glass sheet 17b in advance to produce a laminated body block, the magnetic sheets 15b and 15c are separated when the laminated body block is separated into pieces. Since the magnetic material to be formed is filled in the notches 18a and 18b of the glass sheet 17b, the marker surfaces 20a and 20b on the opposite side surfaces have various patterns for identifying the types without requiring fine printing. It is possible to easily obtain a laminated coil component having

  FIG. 5 is a front view schematically showing a third embodiment of the laminated coil component according to the present invention.

  In this laminated coil component, as in the first embodiment, an internal electrode 29 made of a straight coil is embedded in the component element body 21, and a pair of external electrodes 3 a and 3 b are provided at both ends of the component element body 21. Is formed.

  Specifically, the component body 21 includes a plurality of insulating layers including first insulating layers 22a to 22e and second insulating layers 23a to 23c having different colors from the first insulating layers 22a to 22e. The first insulating layers 22a to 22e and the second insulating layers 23a to 23c are exposed on opposite side surfaces of the four side surfaces of the component body 21. Yes.

  In the third embodiment, as in the first embodiment, the second insulating layers 23a to 23c have the same or substantially the same thickness, and the second insulating layer 23b and the second insulating layer 23b are the same as the second insulating layer 23b. These insulating layers 23c are integrated adjacent to each other in the stacking direction, and a second insulating layer 23d thicker than the second insulating layer 23a is formed. Further, the second insulating layer 23d has a convex protrusion 24 formed at the interface with the first insulating layer 22c. That is, in the third embodiment, the pattern formed by the second insulating layers 23a and 23d including the protrusion 24 acts as a marker, and the opposite side surfaces form the marker surfaces 30a and 30b. . Then, by associating the pattern formed in this way with the type of the laminated coil component, the type of the laminated coil component can be selected.

  As described above, also in the third embodiment, similar to the first and second embodiments, by recognizing the pattern drawn by the second insulating layers 23a and 23d, different types of laminated coil components are mixed. Can be avoided as much as possible.

  As materials having different colors, black magnetic materials can be preferably used for the first insulating layers 22a to 22e, as in the first and second embodiments. For the second insulating layers 23a and 23d containing, a transparent glass-based material can be preferably used.

  Next, the manufacturing method of the said laminated coil component is explained in full detail about the case where a magnetic material is used for the 1st insulating layers 22a-22e and a glass-type material is used for the 2nd insulating layers 23a and 23d.

  First, similarly to the first and second embodiments, a magnetic material and a glass material are produced.

  FIG. 6 is an exploded perspective view of a laminated molded body that is an intermediate product of the laminated coil component.

  In FIG. 6 as well, for convenience of explanation, an individual laminated molded body is illustrated.

  That is, similarly to the first and second embodiments, magnetic sheets (first insulating sheets) 25a to 25e are produced, and a linear conductive pattern 26 is produced on the surface of the magnetic sheet 25d. And when a laminated body block is separated into pieces, a hole is formed in the magnetic material sheet 25c by laser irradiation or the like so that both opposing side surfaces of the magnetic material sheet 25c have semicircular cutouts. Thus, when the laminated body block before the crimping process, which will be described later, is shown in units of laminated molded bodies, semicircular cutout portions 27a and 27b are formed on both side surfaces of the magnetic sheet 25c as shown in FIG. Become.

  Next, glass sheets (second insulating sheets) 28a to 28c are prepared using a glass-based material.

  The glass sheet 28a is sandwiched between the magnetic sheet 25a and the magnetic sheet 25b, the glass sheet 28b and the glass sheet 28c are sandwiched between the magnetic sheet 25b and the magnetic sheet 25c, and the magnetic sheet 25d is The magnetic sheets 25a to 25e and the glass sheets 28a to 28c are laminated so as to be sandwiched between the magnetic sheet 25c and the magnetic sheet 25e, and heated and pressurized to obtain a laminated body block. At this time, the hole is filled with a glass-based material for forming the glass sheet 28c by a pressure-bonding process during heating and pressurization. And this laminated body block is separated into pieces, and a laminated molded object is obtained.

  Thereafter, the component body 21 is manufactured by the same method and procedure as in the first embodiment, and further, the external electrodes 3a and 3b are formed. Thereby, the laminated coil component of the third embodiment is manufactured. .

  As described above, also in the present manufacturing method, by forming holes in the large-sized magnetic sheet 25c in advance to produce a laminate block, the glass sheet 28c is formed when the laminate block is singulated. Since the glass material is filled in the cutout portions 27a and 27b of the magnetic sheet 25c, various patterns for product identification are provided on the opposing marker surfaces 30a and 30b without requiring fine printing. The laminated coil component can be easily obtained.

  FIG. 7 is a front view schematically showing a fourth embodiment of the laminated coil component according to the present invention.

  In this laminated coil component, as in the first embodiment, an internal electrode 39 made of a straight coil is embedded in a component element body 31, and a pair of external electrodes 3a and 3b are provided at both ends of the component element body 31. Is formed.

  Specifically, the component body 31 includes a plurality of insulating layers including first insulating layers 32a to 32g and second insulating layers 33a to 33d having different colors from the first insulating layers 32a to 32g. The first insulating layers 32a to 32g and the second insulating layers 33a to 33d are exposed on opposite side surfaces of the four side surfaces of the component body 31. Yes.

  In the fourth embodiment, the first insulating layers 32a to 32g and the second insulating layers 33a to 33d are substantially alternately stacked, and each of the second insulating layers 33a to 33d includes: It has a form divided into two or three, and a material forming the first insulating layers 32a to 32g is filled in the divided gap.

  A pattern formed by the second insulating layers 33a to 33d acts as a marker, and opposite side surfaces form marker surfaces 40a and 40b.

  As described above, also in the fourth embodiment, as in the first to third embodiments, the second insulating layers 33a to 33d having different colors from the first insulating layers 32a to 32g are the same as the above. Since the surface is exposed on both side surfaces of the component body 31 together with the first insulating layers 32a to 32g, the type can be easily identified by recognizing the pattern of the second insulating layers 33a to 33d. Therefore, by associating these with the types of the laminated coil components, it is possible to easily select the types of the laminated coil components.

  As materials having different colors, black magnetic materials can be preferably used for the first insulating layers 32a to 32g as in the first to third embodiments. A transparent glass-based material can be used for the insulating layers 33a to 33d.

  Next, the manufacturing method of the said laminated coil component is explained in full detail about the case where a magnetic material is used for the 1st insulating layers 32a-32g and a glass-type material is used for the 2nd insulating layers 33a-33d.

  First, similarly to the first and second embodiments, a magnetic material and a glass material are produced.

  FIG. 8 is an exploded perspective view of a laminated molded body that is an intermediate product of the laminated coil component.

  In FIG. 8 as well, for convenience of explanation, an individual laminated molded body is illustrated.

  That is, similarly to the first embodiment, magnetic sheets (first insulating sheets) 35a to 35g are produced, and a linear conductive pattern 36 is produced on the surface of the magnetic sheet 35d.

  Next, glass sheets (second insulating sheets) 37a to 37d are produced using the slurry-like glass material. And when the laminated body block is separated into pieces, the glass sheets 37a to 37d are irradiated with laser or the like so that the opposite side surfaces of the glass sheets 37a to 37d have two or four semicircular cutouts. Create a hole. Thus, when a laminated body block before press-bonding processing to be described later is shown in a laminated molded body unit, semicircular cutout portions 38a to 38l are formed on both side surfaces of the glass sheets 37a to 37d as shown in FIG. become.

  Next, the glass sheet 37a is sandwiched between the magnetic sheet 35a and the magnetic sheet 35b, the glass sheet 37b is sandwiched between the magnetic sheet 35c and the magnetic sheet 35d, and the glass sheet 37c is further separated from the magnetic sheet 35d. The magnetic sheets 35a to 35g and the glass sheets 37a to 37d are laminated so that the glass sheet 37d is sandwiched between the magnetic sheet 35f and the magnetic sheet 35g, and heated and heated. To obtain a laminate block. At this time, the holes are filled with a magnetic material for forming the magnetic sheets 35a to 35g by a pressure-bonding process during heating and pressurization. And this laminated body block is separated into pieces, and a laminated molded object is obtained.

  Thereafter, the component body 31 is manufactured by the same method and procedure as in the first embodiment, and further, the external electrodes 3a and 3b are formed. Thereby, the multilayer coil component of the fourth embodiment is manufactured. .

  Thus, also in this manufacturing method, when the laminated body block is separated into individual pieces by forming holes in the predetermined positions of the large-sized glass sheets 37a to 37d in advance, the magnetic material sheet Since the magnetic material forming 35a to 35g is filled in the cutout portions 38a to 38l of the glass sheets 37a to 37d, the marker surfaces 40a and 40b on the opposite side surfaces are identified without the need for fine printing. Therefore, it is possible to easily obtain a laminated coil component having various patterns.

  FIG. 9 is a system configuration diagram showing an embodiment of an inspection system for laminated coil components.

  The inspection system includes a conveying belt 42 that conveys the laminated coil component 41 in the direction of arrow A, a component alignment unit 43 that adjusts the posture of the laminated coil component 41 so that the marker surface of the laminated coil component 41 is located on the upper surface side, A first imaging device 44 that images the marker surface, and a selection unit 45 that selects the type of the laminated coil component 41 based on the imaging result of the first imaging device 44 are provided.

  In addition, the component aligning unit 43 can rotate the multilayer coil component 41 in the clockwise direction based on the second imaging device 46 that captures the appearance of the multilayer coil component 41 and the imaging result of the second imaging device 46. A rotation mechanism (not shown).

  In the inspection system, when the laminated coil component 41 is conveyed in the direction of arrow A via the conveyance belt 42 and reaches the component alignment unit 43, the second imaging device 46 is driven to image the appearance of the laminated coil component 41. . In this case, as shown in FIG. 10A, when the opposing marker surfaces 47a and 47b are positioned on the xy plane and face the second imaging device 46, the laminated coil component 41 is It is conveyed in the direction of arrow B as it is.

  On the other hand, as shown in FIGS. 10B and 10I, when the marker surfaces 47a and 47b are located on the xz plane and do not face the second imaging device 46, FIGS. As shown, the multilayer coil component 41 is rotated 90 ° clockwise through the rotation mechanism, and the posture of the multilayer coil component 41 is adjusted so that the marker surfaces 47a and 47b face the second imaging device 46. Thereafter, the laminated coil component 41 is conveyed in the arrow B direction.

  After that, the marker surface 47a is imaged by the first imaging device 44 to recognize the pattern of the second insulating layer, and the type is selected by this, and the laminated coil component 41 having specifications matching the product lot is in the direction of arrow C. The laminated coil parts that are conveyed and are not in conformity with the specifications are discharged from the direction of arrow D.

  As described above, in this inspection system, the opposite side surfaces of the laminated coil component 41 form the marker surfaces 47a and 47b having the same pattern, so that the posture of the laminated coil component 41 is randomly conveyed on the conveying belt 42. However, the posture of the laminated coil component 41 can be adjusted only by turning 90 ° clockwise once.

  FIG. 11 shows a case where a marker is provided on only one side surface among the four side surfaces of the laminated coil component (component body).

  That is, as shown in FIG. 11A, when the marker surface 49 is positioned on the xy plane and faces the second imaging device 46, the laminated coil component 48 is conveyed as it is in the arrow B direction. Can do. Further, as shown in FIGS. 11 (b) and (iii), when the marker surface 49 is positioned on the xz plane and positioned on the front side surface, the orientation of the laminated coil component 48 can be changed by turning 90 ° once in the clockwise direction. Can be arranged. However, as shown in FIGS. 11 (b) and (ii), when the marker surface 49 is located on the bottom surface, it is necessary to turn 90 ° twice in the clockwise direction, as shown in FIGS. 11 (b) and (i). Thus, when the marker surface 49 is located on the back side surface, it is necessary to rotate 90 ° three times in the clockwise direction, which may hinder the speeding up of the inspection process.

  On the other hand, in the laminated coil component 41 of the present invention, the opposite side surfaces are the marker surfaces 47a and 47b, so that the marker surfaces 47a and 47 are on the xz plane and the posture of the laminated coil component 41 is not aligned. Even in such a case, it is possible to adjust the posture of the laminated coil component 41 by turning 90 ° in the clockwise direction only once, the efficiency of the inspection process can be improved, and the laminated coil component 41 having a desired specification can be obtained. Sorting can be done easily and quickly.

  In addition, this invention is not limited to the said embodiment, In the range which does not deviate from a summary, it can change variously. In other words, each of the above embodiments is an example for realizing the present invention, and it is sufficient that the first and second insulating layers having different colors are exposed on the opposite side surfaces. The pattern formed by the insulating layer can be variously varied in addition to the above-described embodiment, and by increasing such a variation, it is possible to deal with selection of a wider variety of laminated coil components.

  Moreover, in the said embodiment, although the combination of a magnetic material and a glass-type material was illustrated as an insulating material from which a color differs, various combinations are possible in the range which does not impair a characteristic.

  In the inspection system described in detail in the above embodiment, the rotation mechanism can rotate clockwise. However, since the markers are formed on the opposite side surfaces, even if the rotation mechanism is rotated counterclockwise, the rotation mechanism is turned once. The orientation of the laminated coil component can be adjusted by turning the wire.

  In the above embodiment, the internal electrodes 1, 19, 29, 39 are formed by straight coils. However, it is needless to say that the present invention can be applied to a planar spiral type or a three-dimensional spiral coil. It can also be applied to LC composite parts. In particular, when the internal electrode is formed of a spiral coil, it is necessary to form a via hole. In the present invention, the formation of the via hole and the hole formation of the glass sheet or magnetic material sheet in the second to fourth embodiments are the same. This can be done in the process, and does not increase the number of manufacturing steps.

  Further, in the second and fourth embodiments, holes are formed in the glass sheet, and in the third embodiment, holes are formed in the magnetic material sheet. Needless to say, it is possible to further increase the number of variations by appropriately forming holes on both sides.

  Markers are added to both opposing side surfaces of the component body to increase the efficiency of sorting the laminated coil components.

1, 19, 29, 39 Internal electrodes 2, 11, 21, 31 Component element bodies 3a, 3b External electrodes 4a-4f, 12a-12e, 22a-22e, 32a-32f First insulating layers 5a-5d, 13a, 13b, 23a-23d, 33a-33d 2nd insulating layers 6a-6f, 15a-15e, 25a-25e, 35a-35g Magnetic material sheet (1st insulating sheet)
8a-8c, 17a, 17b, 28a-28c, 37a-37d Glass sheet (second insulating sheet)
18a, 18b, 27a, 27b, 38a to 38l Notch 24 Projection

Claims (13)

A laminated coil component in which internal electrodes are embedded in a component body in which a plurality of insulating layers are laminated, and external electrodes are formed at both ends of the component body,
The insulating layer includes a first insulating layer and a second insulating layer having a color different from that of the first insulating layer,
The laminated coil component according to claim 1, wherein the first and second insulating layers are exposed on opposite side surfaces of the component element body.   The multilayer coil component according to claim 1, wherein a plurality of the second insulating layers having different thicknesses are stacked via the first insulating layer.   3. The multilayer coil component according to claim 2, wherein the second insulating layer having a large thickness is integrated with a plurality of the second insulating layers having a small thickness adjacent to each other in the stacking direction.   2. The second insulating layer according to claim 1, wherein one layer is divided into two or more, and an insulating material for forming the first insulating layer is filled in the divided gap. The laminated coil component according to claim 3.   The multilayer coil component according to any one of claims 1 to 4, wherein the second insulating layer has a protruding portion and is exposed on the surface.   The multilayer coil component according to claim 5, wherein the protruding portion is formed in a convex shape.   The second insulating layer is composed of two or more layers having the same or substantially the same thickness, and each of the second insulating layers is divided into two or more layers and the divided layers. 2. The laminated coil component according to claim 1, wherein the gap is filled with an insulating material for forming the first insulating layer.   8. The laminated coil according to claim 1, wherein the first insulating layer is made of a magnetic material, and the second insulating layer is made of a glass-based material. parts. Producing a plurality of insulating sheets including a first insulating sheet and a second insulating sheet having a different color from the first insulating sheet;
Applying a conductive paste to the first insulating sheet to form a conductive pattern;
Laminating the plurality of insulating sheets to form a laminate block;
The laminate block is singulated, and a laminated molded body is produced so that the opposite side surfaces are exposed, and
And a step of producing the component body by firing the multilayer molded body.   10. The multilayer coil component according to claim 9, wherein in the step of forming the multilayer body block, the plurality of insulating sheets are stacked such that two or more second insulating sheets are adjacent to each other in the stacking direction. Production method.   When the laminated body block is divided into pieces, both opposing side surfaces of the second insulating sheet form a semicircular cutout, and the cutout is filled with the material for forming the first insulating sheet. The method for manufacturing a laminated coil component according to claim 9 or 10, wherein a hole is formed in the second insulating sheet.   When the laminated body block is divided into pieces, both opposing side surfaces of the first insulating sheet form a semicircular cutout, and the cutout is filled with the material for forming the second insulating sheet. The method for manufacturing a laminated coil component according to claim 9, wherein a hole is formed in the first insulating sheet.   After adjusting the posture of the multilayer coil component such that the exposed surfaces of the first and second insulating layers constituting the multilayer coil component according to any one of claims 1 to 8 are located on a specific surface. An inspection system for a laminated coil component that recognizes a pattern formed by the second insulating layer and selects the laminated coil component based on the recognition result.

Images