JP6024353B2 - Multilayer electronic components - Google Patents

Description

  The present invention relates to a multilayer electronic component, and more specifically to a multilayer electronic component having a direction recognition mark.

  Conventionally, as a multilayer electronic component in which a direction recognition mark is provided on a multilayer body, for example, one disclosed in Patent Document 1 is known. FIG. 6 shows a conventional multilayer electronic component 500.

  As shown in FIG. 6, the conventional multilayer electronic component 500 includes a multilayer body 502 including a circuit element formed by laminating an insulating layer 503 and a conductor 504. An external electrode 505 that is electrically connected to the circuit element is provided.

  In addition, a through hole 508 is provided in the outermost layer 503a in the stacking direction of the stacked body 502, and a color corresponding to the through hole 508 on the insulating layer 503b located below the insulating layer 503a is different. The direction recognition mark 509 is provided so as to be exposed in the through hole 508.

  In the multilayer electronic component 500, a plurality of insulating layers 503 on which conductors 504 are formed are stacked, and an insulating layer 503b on which direction recognition marks 509 are formed and an outermost layer 503a on which through holes 508 are provided. Further, it is produced by stacking. Further, as the material of the direction recognition mark 509, the same conductive paste as that of the conductor 504 is shown.

JP 2003-7573 A

  However, in the conventional multilayer electronic component 500, as described above, a process of separately forming the direction recognition mark 509 is essential, leading to an increase in the number of steps in the manufacturing process of the multilayer electronic component 500. It was.

  In addition, since the conductive paste is used as the direction recognition mark 509, stray capacitance with other electrodes is generated, and the direction recognition mark 509 changes the characteristics of the multilayer electronic component 500. there were. In some cases, the design must also take into account the stray capacitance between the direction recognition mark 509 and other electrodes, and the direction recognition mark 509 limits the degree of design freedom. .

  Therefore, in view of the above-mentioned problems, the present invention provides a laminated body that has a mark function, so that it is not necessary to separately form a direction recognition mark and can be easily manufactured. The purpose is to provide electronic components.

A multilayer electronic component according to the present invention is a multilayer electronic component including a multilayer body including a circuit element formed by laminating a plurality of conductors and a plurality of insulating layers, and is provided on a surface of the multilayer body. An external electrode electrically connected to the circuit element is formed, and the plurality of insulating layers are one layer having a color different from one outermost layer in the stacking direction of the stacked body and a surface of the one outermost layer. Only one insulating layer and an insulating layer group other than the one outermost layer and the one insulating layer composed of the different colors, and the color of the one outermost layer is the same as the color of the insulating layer group A color component that produces a color difference between the one outermost layer and the insulating layer group and the one insulating layer made of different colors is magnesium, and only one layer made of the different colors The magnesium content of the insulating layer is the same as that of the outermost layer Magnesium content and greater than the magnesium content of each of the insulating layer of the insulating layer group, the surface of one of the outermost layer above until insulation layer of single layer made of the different colors, a through hole is provided It is characterized by being.

  With such a multilayer electronic component, when the multilayer electronic component is viewed in plan from the outer side of the outermost layer, an insulating layer having a color different from the surface of the outermost layer is exposed through the through hole. Therefore, it is possible to easily recognize the color difference using an image recognition device or the like.

  Therefore, in the multilayer electronic component according to the present invention, unlike the conventional multilayer electronic component, the multilayer body itself can have a mark function, so there is no need to separately form a direction recognition mark. Manufacturing can be facilitated.

  In addition, when forming an external electrode by plating, it also has the following advantages.

  That is, when the direction recognition mark 509 is formed of a conductive material as in the conventional multilayer electronic component 500, the plating adheres to the direction recognition mark 509 in the plating process, which is caused by variations in the amount of adhesion. As a result, color variation occurs, resulting in a decrease in recognition accuracy of the direction recognition mark 509 by the image processing apparatus or the like, and there is a possibility that the orientation of the multilayer electronic component is erroneously recognized when mounted on an external substrate or the like. .

  However, in the case of the multilayer electronic component according to the present invention, since no conductive material is used as the direction recognition mark, the mark does not adhere to the mark. It is also possible to suppress the decrease in.

  With the multilayer electronic component according to the present invention, the laminate itself can be provided with a mark function, so that it is not necessary to separately form a direction recognition mark, and manufacturing can be facilitated.

1 is a cross-sectional view showing a multilayer electronic component 100 according to a first embodiment of the present invention. FIG. 2 is a plan view showing the multilayer electronic component 100 shown in FIG. 1. It is sectional drawing which shows the multilayer electronic component 200 which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the multilayer electronic component 300 which concerns on 3rd Embodiment of this invention. It is sectional drawing which shows the multilayer electronic component 400 which concerns on 4th Embodiment of this invention. It is sectional drawing which shows the conventional multilayer electronic component 500. FIG.

  Hereinafter, the multilayer electronic component 100 according to the first embodiment of the present invention will be described with reference to the drawings. 1 is a cross-sectional view of the multilayer electronic component 100, and FIG. 2 is a plan view of the multilayer electronic component 100.

  In the first embodiment, a case of a laminated LC filter is taken as an example. In this case, the multilayer electronic component 100 includes circuit elements such as capacitors and inductors.

  As shown in FIGS. 1 and 2, the multilayer electronic component 100 includes a multilayer body 2 including a circuit element formed by laminating an insulating layer 3 made of ceramic and a conductor 4. The external electrode 5 electrically connected to the circuit element is provided on the surface of the substrate.

  Further, a part of the insulating layer 3 is an insulating layer 3b having a color different from the surface of the outermost layer 3a in the stacking direction of the stacked body 2, and further, through holes extending from the surface of the outermost layer 3a to the insulating layer 3b. 8 is provided.

  In such a multilayer electronic component 100, when the multilayer electronic component 100 is viewed in plan from the outer side of the outermost layer 3a described above, an insulating layer having a color different from the surface of the outermost layer 3a through the through hole 8. 3b is exposed and visible. Therefore, unlike the conventional multilayer electronic component 500, it is not necessary to separately provide a direction recognition mark at the bottom of the through hole 508, and the outermost layer 3a and the insulating layer can be formed through the through hole 8 using an image recognition device or the like. By recognizing the difference in the color 3b, the orientation of the multilayer electronic component 100 can be specified.

  Therefore, in the multilayer electronic component according to the present invention, the multilayer body itself can have a mark function, so that it is not necessary to separately form a direction recognition mark, and manufacturing can be facilitated. Become.

  Further, in the multilayer electronic component according to the present invention, since the conductive material is not used as the direction recognition mark, unlike the conventional multilayer electronic component in which the direction recognition mark is provided by the conductive material, the direction recognition mark and It is also possible to prevent the characteristics of the multilayer electronic component from changing due to stray capacitance with other electrodes.

  Further, the ceramic used for the insulating layer 3 has almost no color variation. Therefore, in the mass production process, it is possible to form an insulating layer having a substantially constant color which is stable in each of the outermost layer 3a and the insulating layer 3b. Therefore, image recognition can be performed more accurately with little color variation.

  In addition, as described above, in the case of the multilayer electronic component according to the present invention, even when the external electrode is formed by plating, since the conductive material is not used as the direction recognition mark, the mark is not attached. The image recognition accuracy is not reduced due to the difference in color due to the variation in the amount of adhesion of the plating, and as a result, it is more accurate than the case where the direction recognition mark is formed by the conductive material. It becomes possible to specify the orientation of the component.

  Next, an example of a method for manufacturing the multilayer electronic component 100 according to the first embodiment will be described.

  First, a ceramic green sheet (not shown) to be the insulating layer 3 is produced. The ceramic green sheet is prepared by, for example, adding an appropriate amount of a binder, a dispersant, a plasticizer, an organic solvent, and the like to a mixed powder obtained by mixing ceramic powder and glass powder, and mixing them to obtain a ceramic slurry. And the ceramic slurry is formed into a sheet by a doctor blade method or the like.

  At this time, in order to create a difference in color between the outermost layer 3a and the insulating layer 3b, ceramic green sheets of at least two kinds of colors are produced. For example, in the first embodiment, magnesium is used as the coloring component that produces such a color difference. More specifically, the magnesium content of the ceramic green sheet to be the outermost layer 3a and the ceramic green sheet to be the insulating layer 3b is, for example, 1 to 10 by weight ratio, so that the magnesium content after firing. The insulating layer 3b having a large amount is finished in a deeper green color than the outermost layer 3a, and the outermost layer 3a having a low magnesium content is finished in a color closer to brown than the insulating layer 3b.

  Next, a through hole to be the through hole 8 is formed at a predetermined position of the ceramic green sheet to be the outermost layer 3a. In addition, a through hole for forming a via hole conductor is formed as needed at a predetermined position of a specific ceramic green sheet, and the via hole conductor is formed by filling the through hole for forming the via hole conductor with a conductive paste. . It is not necessary to fill the through hole to be the through hole 8 with a conductive paste or the like to be the direction recognition mark.

  Next, a conductive paste to be the conductor 4 is printed on a predetermined position of the specific ceramic green sheet as necessary.

  Next, these ceramic green sheets are laminated in a predetermined order. At this time, the ceramic green sheet provided with the through hole to be the through hole 8 is arranged to be the outermost layer 3a, and the ceramic green sheet to be the insulating layer 3b is arranged below the outermost layer 3a. Thereby, the ceramic green sheet which should become the insulating layer 3b is provided inside the laminated body 2, and the ceramic green sheet that should become the insulating layer 3b is exposed through the through hole that should become the through hole 8. A structure (laminate 2) can be obtained.

  Next, the laminate 2 is pressure-bonded with a predetermined profile and fired. Thereby, the fired laminated body 2 is obtained.

  Next, the external electrode 5 is produced by processes such as coating, baking, and plating.

  As described above, even in the case where the external electrode 5 is formed by plating, the laminated electronic component according to the present invention does not use a conductive material as the direction recognition mark. The image recognition accuracy is not reduced due to the difference in color due to the variation in the amount of plating applied, and as a result, the laminated type is more accurate than when the direction recognition mark is formed of a conductive material. The direction of the electronic component can be specified.

  Even when plating is performed on the external electrode formed by coating and baking, as described above, the direction of the multilayer electronic component can be specified with higher accuracy.

  With the above method, the multilayer electronic component 100 according to the first embodiment is completed.

  In the first embodiment, the case of a laminated LC filter is given as an example, but the present invention is not limited to a laminated LC filter, and as long as the purpose of the present invention is satisfied, Various changes can be made. For example, the multilayer electronic component may be a multilayer capacitor, a multilayer inductor, or the like.

  Moreover, in 1st Embodiment, magnesium is used as a coloring component and the magnesium content of the ceramic green sheet which should become the insulating layer 3b is made larger than the magnesium content of the ceramic green sheet which should become the outermost layer 3a. However, the reverse is also possible. Further, the color difference between the outermost layer 3a and the insulating layer 3b may be produced by the difference in the content of materials other than magnesium or the difference in materials. However, it is desirable to use the same material and create a difference in color depending on the amount added so that the outermost layer 3a and the insulating layer 3b can be fired simultaneously.

  Moreover, in 1st Embodiment, although the through-hole which should become the through-hole 8 is provided with respect to the ceramic green sheet before lamination | stacking, the through-hole 8 is provided with respect to the laminated body 2 after laminating | stacking each ceramic green sheet. A method of drilling may be used.

  Further, in the first embodiment, the through hole 8 is provided only in one ceramic green sheet to be the outermost layer 3a. For example, like the multilayer electronic component 200 according to the second embodiment shown in FIG. In addition, a plurality of ceramic green sheets including the ceramic green sheet to be the outermost layer 3a are formed with through holes to be the through holes 8 so that the insulating layer 3b is exposed on the bottom side of the through holes 8. 3b may be laminated.

  Further, the insulating layer 3b having a color different from the surface of the outermost layer 3a is not necessarily one layer. For example, like the multilayer electronic component 300 according to the third embodiment shown in FIG. A plurality of insulating layers 3b having a different color from the surface may be stacked.

  Further, for example, as in the multilayer electronic component 400 according to the fourth embodiment shown in FIG. 5, all the layers other than the outermost layer 3a may be the insulating layer 3b having a color different from the surface of the outermost layer 3a. In this case, for example, after a plurality of ceramic green sheets to be the insulating layer 3b are stacked, the ceramic green sheet to be the outermost layer 3a is disposed at the position of the outermost layer.

  Further, in the first embodiment, the shape of the above-described through hole 8 is a columnar shape, but the shape of the through hole is arbitrary, and may be other shapes such as a prismatic shape, for example. In addition, in order to make it easier to recognize the direction of the multilayer electronic component, an arrow or the like itself may have a shape indicating the direction.

Further, as the position where the through hole 8 is formed, when the outermost layer 3a of the multilayer electronic component 100 is viewed from the outside of the outermost layer 3a in order to identify the direction of the multilayer electronic component, It is desirable to be biased. However, as long as the shape of the through hole 8 itself is a shape indicating the direction, such as an arrow, the center portion may be used.

100, 200, 300, 400: Stacked electronic component 2: Stacked body 3: Insulating layer 3a: Outermost layer 3b: Insulating layer 4 of different colors: Conductor 5: External electrode 8: Through hole

Claims (3)

In a multilayer electronic component including a multilayer body including a circuit element formed by laminating a plurality of conductors and a plurality of insulating layers,
An external electrode electrically connected to the circuit element is formed on the surface of the laminate,
The plurality of insulating layers include one outermost layer in the stacking direction of the laminate, only one insulating layer having a color different from the surface of the one outermost layer, the one outermost layer, and the different color. An insulating layer group other than only one insulating layer consisting of:
Each of the plurality of insulating layers includes magnesium,
The color of the one outermost layer and the color of the insulating layer group are the same color,
The coloring component that produces a color difference between the one outermost layer and the insulating layer group and only one insulating layer made of different colors is magnesium,
The magnesium content of only one insulating layer having a different color is greater than the magnesium content of the one outermost layer and the magnesium content of each insulating layer of the insulating layer group,
A multilayer electronic component, wherein a through hole is provided from the surface of the one outermost layer to the single insulating layer having the different color. The multilayer electronic component according to claim 1, wherein the external electrode is formed by plating. Wherein the insulating layer is a ceramic multilayer electronic component according to claim 1 or claim 2 and the insulating layer and the conductive body, characterized in that it is simultaneously fired.

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