JP5824622B2 - Composite parts - Google Patents

Description

  The present invention is a composite part used in electronic devices, electrical circuits, etc., and has a function of protecting a protected part from overvoltage such as an inductor part such as a normal mode noise filter and a common mode noise filter, and an electrostatic countermeasure part. It is what you have.

  In recent years, noise countermeasures by increasing the frequency of electric circuits have become important, and resistance to static electricity has been reduced due to the miniaturization of electronic components, and protection against overvoltage such as static electricity has become important. Under such circumstances, a composite component is proposed in which a common mode noise filter and an antistatic component for protecting the common mode noise filter or other electronic components from static electricity are combined into one component.

JP 2006-294724 A

  In the conventional composite parts described above, in order to improve the performance of the inductor portion such as a common mode noise filter, a magnetic layer is basically used in the inductor portion so that the magnetic flux can easily pass through the magnetic layer. Yes. On the other hand, in the static electricity countermeasure part, the hollow part is formed. With this configuration, since the permeability of air is low, there is a problem that the hollow portion affects the magnetic flux and the performance of the inductor portion is deteriorated.

  The present invention solves the above-described problems of the prior art, and relates to a composite part that includes an inductor portion and a static electricity countermeasure portion and reduces a decrease in performance of the inductor portion.

  In order to achieve the above object, the present invention has the following configuration.

According to the first aspect of the present invention, a lower laminated portion in which a lower static electricity countermeasure portion is formed, an inductor portion laminated on the lower laminated portion, and an upper static electricity countermeasure portion laminated on the inductor portion are formed. An upper laminated portion, and the axis of the coil constituting the inductor portion coincides with the lamination direction, and the lower static electricity countermeasure portion normally functions as an insulator between a pair of electrodes, and a voltage higher than a predetermined value is applied. has one lower electrostatic passage portion for electrical communication with said upper ESD protection portion, the one upper electrostatic passage unit to be energized and normally between a pair of electrodes functioning voltage higher than a predetermined applied as an insulator a, wherein one lower electrostatic passage portion and said one upper electrostatic passage portion are arranged together in a position shifted from the center axis of the coil, wherein one of said the lower electrostatic passing portion one upper electrostatic passage portion Are those formed in the same position when viewed through in the stacking direction.

  According to the first aspect of the present invention, this configuration has the effect of being able to obtain a composite part including an electrostatic countermeasure unit while reducing a decrease in the performance of the inductor unit.

  The present invention has an effect that it is possible to obtain a composite component including a static electricity countermeasure unit while reducing a decrease in performance of the inductor unit.

Exploded perspective view of composite part in Reference Example 1 (A) Front sectional view of the composite part in Reference Example 1, (b) Side sectional view of the composite part in Reference Example 1 Electrical connection diagram of composite parts in Reference Example 1 Front sectional view of the composite part in Embodiment 1 of the present invention Front sectional view of composite parts in comparative example Exploded perspective view of composite part in Reference Example 2 Electrical connection diagram of composite parts in Reference Example 2 Exploded perspective view of composite part in Reference Example 3

(Reference Example 1)
1 is an exploded perspective view of the composite part in Reference Example 1, FIG. 2 (a) is a front sectional view of the composite part in Reference Example 1, FIG. 2 (b) is a side sectional view of the composite part in Reference Example 1, and FIG. FIG. 6 is an electrical connection diagram of the composite part in Reference Example 1;

  Insulating sheet 1, insulating sheet 2, insulating sheet 3, insulating sheet 4, insulating sheet 5, insulating sheet 6, insulating sheet 7, insulating sheet 8, insulating sheet 9 and insulating sheet 10 are obtained by firing sheet-like ceramic. It is the sheet | seat which has the specified insulation performance. These may be all made of the same material, but if necessary, a part may be a magnetic material and the rest may be a non-magnetic material.

  An insulating sheet 2 is disposed on the upper surface side of the insulating sheet 1, and a lower ground electrode 11 is disposed on the insulating sheet 2. The lower ground electrode 11 extends to the end of the long side on the upper surface of the rectangular insulating sheet 2.

  An insulating sheet 3 is disposed on the upper surface side of the insulating sheet 2, and a lower static electricity passage portion 12, which is an opening, is formed at a substantially central portion of the insulating sheet 3. Further, a first lower discharge electrode 13 and a second lower discharge electrode 14 are disposed on the insulating sheet 3. The tips of the first lower discharge electrode 13 and the second lower discharge electrode 14 are located on the lower static electricity passage portion 12, and face the lower ground electrode 11 through the lower static electricity passage portion 12. The first lower discharge electrode 13 and the second lower discharge electrode 14 are each extended to the short side of the rectangular insulating sheet 3.

  An insulating sheet 4 is disposed on the upper surface side of the insulating sheet 3, and a first extraction electrode 15 is disposed on the insulating sheet 4. The first extraction electrode 15 extends to the short side end of the rectangular insulating sheet 4, and the extended portion extends to the short side of the insulating sheet 3 of the first lower discharge electrode 13. It exists in the same position when planarly viewed in the stacking direction.

  An insulating sheet 5 is disposed on the upper surface side of the insulating sheet 4, and a spiral first coil 16 is disposed on the insulating sheet 5. The coil axis of the first coil 16 coincides with the stacking direction. The outer end of the first coil 16 extends to the end of the short side on the upper surface of the rectangular insulating sheet 5, and the extended portion is the insulating sheet of the second lower discharge electrode 14. 3 and present at the same position when viewed in a plan view in the stacking direction. In addition, a connection electrode 17 as a via electrode is formed in the central portion of the insulating sheet 5, and the first coil 16 and the first extraction electrode 15 are electrically connected.

  An insulating sheet 6 is disposed on the upper surface side of the insulating sheet 5, and a spiral second coil 18 is disposed on the insulating sheet 6. The coil axis of the second coil 18 coincides with the stacking direction. The outer end of the second coil 18 extends to the end of the short side on the upper surface of the rectangular insulating sheet 6.

  An insulating sheet 7 is disposed on the upper surface side of the insulating sheet 6, and a connection electrode 19 as a via electrode is formed at the center of the insulating sheet 7, and is electrically connected to the inner end of the second coil 18. doing. Further, a second extraction electrode 20 is disposed on the insulating sheet 7, and the second extraction electrode 20 is electrically connected to the connection electrode 19. The 2nd extraction electrode 20 is extended | stretched to the edge part of the short side in the upper surface of the insulating sheet 7 which is a rectangle.

  An insulating sheet 8 is disposed on the upper surface side of the insulating sheet 7, and a first upper discharge electrode 21 and a second upper discharge electrode 22 are disposed on the insulating sheet 8. The first upper discharge electrode 21 extends to the end of the short side on the upper surface of the rectangular insulating sheet 8, and the extending portion extends to the short side of the insulating sheet 6 of the second coil 18. It exists in the same position when planarly viewed in an extending | stretching part and a lamination direction. Similarly, the second upper discharge electrode 22 extends to the end of the short side on the upper surface of the rectangular insulating sheet 8, and the extended portion of the insulating sheet 7 of the second extraction electrode 20 is extended. It exists in the same position when it planarly views in the extending | stretching part to a short side and a lamination direction.

  An insulating sheet 9 is disposed on the upper surface side of the insulating sheet 8, and an upper static electricity passing portion 23, which is an opening, is formed at a substantially central portion of the insulating sheet 9. Further, an upper ground electrode 24 is disposed on the insulating sheet 9. The upper ground electrode 24 extends to the end of the long side on the upper surface of the rectangular insulating sheet 9.

  An insulating sheet 10 is disposed on the upper surface side of the insulating sheet 9.

  The insulating sheet 1, the insulating sheet 2, the insulating sheet 3, the lower ground electrode 11, the lower static electricity passing portion 12, the first lower discharge electrode 13, and the second lower discharge electrode 14 constitute a lower stacked portion 25. Also, the insulating sheet 4, the insulating sheet 5, the insulating sheet 6, the insulating sheet 7, the first extraction electrode 15, the first coil 16, the connection electrode 17, the second coil 18, the connection electrode 19 and the second extraction electrode 20 constitutes an inductor section 26. Further, the axes of the first coil 16 and the second coil 18 constituting the inductor section 26 are in the stacking direction. In the present embodiment, the inductor section 26 constitutes a common mode noise filter. In addition, the insulating sheet 8, the insulating sheet 9, the insulating sheet 10, the first upper discharge electrode 21, the second upper discharge electrode 22, the upper static electricity passing portion 23 and the upper ground electrode 24 constitute an upper laminated portion 27. .

  As shown in FIG. 2, the lower static electricity passage portion 12 and the upper static electricity passage portion 23 are located at the same place in the left-right direction although they are different in the vertical direction in the front sectional view and the side sectional view. That is, they are formed at the same position when viewed in plan in the stacking direction.

  The first terminal 28 is electrically connected to the first lower discharge electrode 13 and the first extraction electrode 15, and the second terminal 29 is connected to the second extraction electrode 20 and the first upper discharge electrode 21. The third terminal 30 is electrically connected to the second lower discharge electrode 14 and the first coil 16, and the fourth terminal 31 is connected to the second upper discharge electrode 22 and the first upper discharge electrode 22. The second coil 18 is electrically connected.

  Further, the lower ground electrode 11 and the upper ground electrode 24 are electrically connected by a ground terminal (not shown) formed at the end portion on the long side when viewed in plan in the stacking direction of the composite component. .

  The first lower static electricity countermeasure unit 32 includes the lower ground electrode 11, the lower static electricity passage unit 12, and the first lower discharge electrode 13. When an overvoltage due to static electricity is applied to the first terminal 28, a discharge is generated between the first lower discharge electrode 13 and the lower ground electrode 11, thereby preventing a current due to the overvoltage from flowing through the first coil 16. can do.

  The first upper static electricity countermeasure unit 33 includes the first upper discharge electrode 21, the upper static electricity passage unit 23, and the upper ground electrode 24. When an overvoltage due to static electricity is applied to the second terminal 29, the first upper static electricity countermeasure unit 33 A discharge is generated between the upper discharge electrode 21 and the upper ground electrode 24, thereby preventing a current due to an overvoltage from flowing to the second coil 18.

  The second upper static electricity countermeasure unit 34 includes the second upper discharge electrode 22, the upper static electricity passage unit 23, and the upper ground electrode 24. When an overvoltage due to static electricity is applied to the fourth terminal 31, A discharge is generated between the upper discharge electrode 22 and the upper ground electrode 24, thereby preventing a current due to an overvoltage from flowing through the second coil 18.

  The second lower static electricity countermeasure unit 35 includes the lower ground electrode 11, the lower static electricity passage unit 12, and the second lower discharge electrode 14. When an overvoltage due to static electricity is applied to the third terminal 30, Discharge occurs between the lower discharge electrode 14 and the lower ground electrode 11, thereby preventing current due to overvoltage from flowing through the first coil 16.

As described above, the first lower static electricity countermeasure unit 32, the first upper static electricity countermeasure unit 33, the second upper static electricity countermeasure unit 34, and the second lower static electricity countermeasure unit 35 have a current caused by static electricity in the first coil 16. Alternatively, it has a function of preventing the second coil 18 from flowing. Further, the composite part of Reference Example 1 is a so-called π-type as is apparent from the electrical connection diagram shown in FIG.

  Here, in FIG. 2, the magnetic flux by the 1st coil 16 and the 2nd coil 18 is shown with the dashed-two dotted line. In the present embodiment, since the inductor section 26 is a common mode noise filter, it is preferable that the coupling coefficient, which is the magnetic coupling between the first coil 16 and the second coil 18, is high. For this purpose, it is preferable to make the magnetic flux that magnetically couples the first coil 16 and the second coil 18 easier to rotate. Specifically, it is preferable to increase the magnetic permeability of the portion where the magnetic flux turns. However, since the lower static electricity passage part 12 and the upper static electricity passage part 23 are hollow, the magnetic permeability of this part becomes low. In the present embodiment, when the portions where the magnetic permeability is low are present above and below the inductor portion 26, they are located at the same place when viewed in plan in the stacking direction. Furthermore, in the present embodiment, both the lower static electricity passage portion 12 and the upper static electricity passage portion 23 are arranged on the central axes of the first coil 16 and the second coil 18, so that The influence on the magnetic flux that magnetically couples the two coils 18 is reduced.

(Embodiment 1)
Figure 4 is a front sectional view of a composite component definitive to the first embodiment of the present invention, FIG 5 is a front sectional view of a composite component in a comparative example. Figure composite component definitive to the first embodiment of the present invention 4, shifting the position of the lower static passage portion 12 and the upper electrostatic passage portion 23 of the composite component in Reference Example 1 shown in FIGS. 1-3, the lower stacking unit 25 The lower static electricity passing portion 40 and the upper static electricity passing portion 41 are formed in the upper laminated portion 27, and the lower static electricity passing portion 40 and the upper static electricity passing portion 41 are located at the same place when viewed in plan from the lamination direction. doing. On the other hand, in the composite part in the comparative example shown in FIG. 5, the lower static electricity passage part 12 of the composite part in the reference example 1 shown in FIGS. Is shifted to the left in the drawing to form the upper static electricity passage portion 43. Therefore, in the composite component of the comparative example shown in FIG. 5, the lower static electricity passage portion 42 and the upper static electricity passage portion 43 are located at different locations when viewed in plan in the stacking direction.

  Here, considering the magnetic flux of the composite part shown in FIG. 4, when there is no lower static electricity passing portion 40 and upper static electricity passing portion 41, the magnetic flux passing through the place where the lower static electricity passing portion 40 is formed is the upper static electricity passing portion. The passage 41 is also a magnetic flux that passes through. Accordingly, the magnetic flux that magnetically couples the first coil 16 and the second coil 18 that are affected by the provision of the lower static electricity passage portion 40 and the first magnetic flux that is affected by the provision of the upper static electricity passage portion 41. The magnetic flux that magnetically couples the coil 16 and the second coil 18 is the same.

  On the other hand, when the magnetic flux of the comparative example shown in FIG. 5 is examined, when there is no lower static electricity passage portion 42 and upper static electricity passage portion 43, the magnetic flux passing through the place where the lower static electricity passage portion 42 is formed and the upper static electricity passage. It is different from the magnetic flux passing through the place where the portion 43 is formed. Therefore, compared with the composite part shown in FIG. 4, the magnetic flux affected by the formation of the hollow portions such as the lower static electricity passing portion 42 and the upper static electricity passing portion 43 is increased, and the coupling coefficient as the common mode noise filter is deteriorated. To do. Therefore, when the lower static electricity passing portion 40 and the upper static electricity passing portion 41 are positioned in the same place when viewed in plan in the stacking direction as in the composite part shown in FIG. 4, it is possible to suppress the deterioration of the characteristics of the inductor portion 26. .

( Reference Example 2 )
Hereinafter, the composite part in Reference Example 2 will be described with reference to FIGS. 6 and 7. 6 is an exploded perspective view of the composite part in Reference Example 2 , and FIG. 7 is an electrical connection diagram of the composite part in Reference Example 2 .

The composite part in Reference Example 2 is different from the composite part in Reference Example 1 in that the composite part in Reference Example 1 is a set of common mode noise filters, and so-called static electricity countermeasures are connected to both ends of the coils constituting the composite part. In contrast to the π-type, the composite part in Reference Example 2 is a so-called array type having two sets of common mode noise filters, and a so-called L-type in which the static electricity countermeasure unit is connected only to one side of the coil constituting the composite part. It is a point. Further, the static electricity passage portion is a cavity in the reference example 1 , whereas the reference example 2 is different in that it is not a cavity but a voltage variable resistor.

Hereinafter, the composite part in Reference Example 2 will be described in detail.

  The insulating sheets 51 to 70 are the same insulating sheets as in the first embodiment. An insulating sheet 52 is disposed on the upper surface side of the insulating sheet 51, and a lower ground electrode 71 is disposed on the upper surface of the insulating sheet 52. An insulating sheet 53 is disposed on the upper surface side of the insulating sheet 52. Openings are formed at two locations in the insulating sheet 53, one of which is a first lower static electricity passage portion 74 and the other is a second lower static electricity passage portion 75. The first lower electrostatic passage 74 has a high resistance at a normal voltage and functions as an insulator. When an overvoltage is applied, the first lower electrostatic passage 74 has a low resistance and can flow a current caused by the overvoltage. The variable resistor 72 is filled. Similarly, the second lower static electricity passage part 75 is filled with a second lower voltage variable resistor 73. As a material used for the first lower voltage variable resistor 72 and the second lower voltage variable resistor 73, for example, a material used for a varistor, a material in which a conductor is dispersed in a resin, or The thing which formed the void | hole in the insulator is mentioned.

  The first lower discharge electrode 76 is disposed so that a part of the upper surface of the insulating sheet 53 faces the first lower static electricity passage 74. The first lower discharge electrode 76 is in contact with the first lower voltage variable resistor 72, and the first lower voltage variable resistor 72 is in contact with the lower ground electrode 71. Therefore, when an overvoltage is applied, a current due to the overvoltage flows between the first lower discharge electrode 76 and the lower ground electrode 71.

  Similarly, the second lower discharge electrode 77 is arranged so that a part of the upper surface of the insulating sheet 53 faces the second lower static electricity passage part 75, and when the overvoltage is applied, the second lower discharge electrode 77 and the lower part are disposed. A current caused by an overvoltage flows between the ground electrodes 71.

  On the upper surface side of the insulating sheet 53, insulating sheets 54 to 59 are disposed in order from the bottom.

  A first extraction electrode 78 and a second extraction electrode 79 are disposed on the upper surface of the insulating sheet 59.

  An insulating sheet 60 is disposed on the upper surface side of the insulating sheet 59, and a spiral first coil 80 and a second coil 81 are disposed side by side on the upper surface of the insulating sheet 60. The inner end of the first coil 80 is electrically connected to the first extraction electrode 78 by a via (not shown) formed in the insulating sheet 60. Similarly, the inner end portion of the second coil 81 is electrically connected to the second extraction electrode 79.

  An insulating sheet 61 is disposed on the upper surface side of the insulating sheet 60, and a spiral third coil 82 and a fourth coil 83 are disposed side by side on the insulating sheet 61.

  An insulating sheet 62 is disposed on the upper surface side of the insulating sheet 61, and a third extraction electrode 84 and a fourth extraction electrode 85 are disposed on the insulating sheet 62. The third extraction electrode 84 is electrically connected to the inner end portion of the third coil 82 by a via formed in the insulating sheet 62, and the fourth extraction electrode 85 is similarly connected to the inner end portion of the fourth coil 83. And is electrically connected.

  Insulating sheets 63 to 67 are arranged on the upper surface side of the insulating sheet 62.

  A first upper discharge electrode 86 and a second upper discharge electrode 87 are disposed on the upper surface of the insulating sheet 67. The first upper discharge electrode 86 is electrically connected to the third coil 82 by a third terminal electrode (not shown) formed on the surface of the composite component. Similarly, the second upper discharge electrode 87 is electrically connected to the fourth coil 83 by a fourth terminal electrode (not shown).

  An insulating sheet 68 is disposed on the upper surface side of the insulating sheet 67. Two openings are formed in the insulating sheet 68, one of which is a first upper static electricity passage portion 88 and the other is a second upper static electricity passage portion 89. The first upper static electricity passage section 88 is filled with a first upper voltage variable resistor 90, and the second upper static electricity passage section 89 is filled with a second upper voltage variable resistor 91. The first upper voltage variable resistor 90 and the second upper voltage variable resistor 91 are made of the same material as the first lower voltage variable resistor 72 and the second lower voltage variable resistor 73 and have the same function. Have The first upper voltage variable resistor 90 is in contact with the first upper discharge electrode 86, and the second upper voltage variable resistor 91 is in contact with the second upper discharge electrode 87.

  An upper ground electrode 92 is formed on the upper surface side of the insulating sheet 68, and the upper ground electrode 92 is formed in contact with the first upper voltage variable resistor 90 and the second upper voltage variable resistor 91. Accordingly, when an overvoltage is applied to the first upper discharge electrode 86, a current due to the overvoltage flows between the first upper discharge electrode 86 and the upper ground electrode 92. Similarly, when an overvoltage is applied to the second upper discharge electrode 87, a current due to the overvoltage flows between the second upper discharge electrode 87 and the upper ground electrode 92.

  On the upper surface side of the insulating sheet 68, an insulating sheet 69 and an insulating sheet 70 are arranged in order from the bottom.

  Insulating sheet 51 to insulating sheet 54, lower ground electrode 71, first lower voltage variable resistor 72, second lower voltage variable resistor 73, first lower static electricity passing portion 74, second lower static electricity passing portion 75 The first lower discharge electrode 76 and the second lower discharge electrode 77 constitute the lower laminated portion 93, and the insulating sheet 55 to the insulating sheet 66, the first extraction electrode 78, the second extraction electrode 79, the first The inductor 80 is constituted by the coil 80, the second coil 81, the third coil 82, the fourth coil 83, and the third extraction electrode 84, and the insulating sheet 67 to the insulating sheet 70, the first upper discharge electrode 86. , Second upper discharge electrode 87, first upper static electricity passage section 88, second upper static electricity passage section 89, first upper voltage variable resistor 90, second upper voltage variable resistor 91, and upper ground electrode 9 It constitutes an upper stacked portion 95 by.

  The first lower static electricity countermeasure unit 96 includes a lower ground electrode 71, a first lower voltage variable resistor 72, a first lower static electricity passage unit 74, and a first lower discharge electrode 76.

  The first upper static electricity countermeasure unit 97 includes a first upper discharge electrode 86, a first upper static electricity passage unit 88, a first upper voltage variable resistor 90, and an upper ground electrode 92.

  The second lower static electricity countermeasure unit 98 includes a lower ground electrode 71, a second lower voltage variable resistor 73, a second lower static electricity passage unit 75, and a second lower discharge electrode 77.

  The second upper static electricity countermeasure unit 99 includes a second upper discharge electrode 87, a second upper static electricity passage unit 89, a second upper voltage variable resistor 91, and an upper ground electrode 92.

  Further, the outer end of the first coil 80 and the first lower discharge electrode 76 are electrically connected by a first terminal (not shown), and the outer end of the second coil 81 and the first The second lower discharge electrode 77 is electrically connected by a second terminal (not shown), and the outer end of the third coil 82 and the first upper discharge electrode 86 are connected to a third terminal (see FIG. The outer end of the fourth coil 83 and the second upper discharge electrode 87 are electrically connected by a fourth terminal (not shown).

  With the configuration as described above, when an overvoltage due to static electricity is applied to the first lower discharge electrode 76, the resistance value of the first lower voltage variable resistor 72 is greatly reduced, resulting in a current caused by static electricity. Flows not through the first coil 80 but through the first lower voltage variable resistor 72, so that the first coil 80 or the electronic components connected in series with the first coil 80 are protected. Can do. That is, the first lower static electricity countermeasure unit 96 can protect the first coil 80 and the like from static electricity.

  The same applies to the first upper static electricity countermeasure unit 97, the second lower static electricity countermeasure unit 98, and the second upper static electricity countermeasure unit 99.

( Reference Example 3 )
Hereinafter, the composite part in Reference Example 3 will be described with reference to FIG. FIG. 8 is an exploded perspective view of the composite part in Reference Example 3. FIG.

The composite part is a composite part differs in Reference Example 1 in Reference Example 3, whereas the static passage portion of the composite component in Reference Example 1 was a total of two one by one at the top and bottom of the inductor unit, Reference Example 3 The difference is that the composite parts in FIG. Further, in the reference example 1, the static electricity passage portion is a cavity, whereas the composite part in the reference example 3 is different from the composite part in the reference example 2 in that it is not a cavity but a voltage variable resistor.

On the other hand, the composite part in Reference Example 3 is a so-called π type in which one set of common mode noise filters is connected to both ends of a coil constituting the common mode noise filter, and this point is the composite part of the first embodiment. And in common.

Hereinafter, the composite part in Reference Example 3 will be briefly described.

The insulating sheet 101 to the insulating sheet 120 are made of the same material as in the first embodiment and the reference examples 1 and 2 .

  An insulating sheet 102 is disposed on the upper surface side of the insulating sheet 101, and a lower ground electrode 121 is disposed on the upper surface of the insulating sheet 102. Two openings are formed in the insulating sheet 103 disposed on the upper surface side of the insulating sheet 102, one of which is a first lower static electricity passage portion 124 and the other is a second lower static electricity passage portion 125. The first lower electrostatic passage 124 and the second lower electrostatic passage 125 are filled with a first lower variable resistor 122 and a second lower variable resistor 123, both of which are lower ground electrodes. 121 is in contact. In addition, a first lower discharge electrode 126 is disposed on the upper surface of the insulating sheet 103 so as to partially contact the first lower variable resistor 122, and further, the second lower variable resistor 123 and a part thereof A second lower discharge electrode 127 is disposed so as to come into contact.

  On the upper surface side of the insulating sheet 103, the insulating sheets 104 to 109 are arranged in order from the bottom, and a first extraction electrode 128 is formed on the upper surface of the insulating sheet 109.

  An insulating sheet 110 is disposed on the upper surface side of the insulating sheet 109, and a first coil 129 is disposed on the upper surface of the insulating sheet 110. The inner end portion of the first coil 129 is electrically connected to the distal end portion of the first extraction electrode 128 by a via electrode (not shown) formed in the insulating sheet 110.

  An insulating sheet 111 is disposed on the upper surface side of the insulating sheet 110, and a second coil 130 is disposed on the upper surface of the insulating sheet 111. An insulating sheet 112 is disposed on the upper surface side of the insulating sheet 111, and a second extraction electrode 131 is disposed on the upper surface of the insulating sheet 112. The distal end portion of the second extraction electrode 131 is electrically connected to the inner end portion of the second coil 130 by a via electrode (not shown) formed in the insulating sheet 112.

  The insulating sheet 113 to the insulating sheet 117 are arranged in order from the bottom on the upper surface side of the insulating sheet 112, and the first upper discharge electrode 132 and the second upper discharge electrode 133 are arranged on the upper surface of the insulating sheet 117. . On the upper surface side of the insulating sheet 117, an insulating sheet 118 in which a first upper static electricity passing portion 134 and a second upper static electricity passing portion 135, which are openings, are disposed, and the first upper static electricity passing portion 134 and The second upper static electricity passing portion 135 is filled with a first upper variable resistor 136 and a second upper variable resistor 137, respectively. The upper ground electrode 138 is disposed on the upper surface of the insulating sheet 118, the first upper variable resistor 136 is in contact with the first upper discharge electrode 132 and the upper ground electrode 138, and the second upper variable resistor 137 is the first upper variable resistor 137. 2 upper discharge electrodes 133 and upper ground electrodes 138 are in contact. An insulating sheet 119 and an insulating sheet 120 are disposed on the upper surface side of the insulating sheet 118.

  Insulating sheet 101-insulating sheet 104, lower ground electrode 121, first lower variable resistor 122, second lower variable resistor 123, first lower static electricity passage 124, second lower static electricity passage 125, first The first lower discharge electrode 126 and the second lower discharge electrode 127 constitute a lower laminated portion 139. The insulating sheet 105 to the insulating sheet 116, the first extraction electrode 128, the first coil 129, the second coil 130, and The inductor part 140 is configured by the second extraction electrode 131, and the insulating sheet 117 to the insulating sheet 120, the first upper discharge electrode 132, the second upper discharge electrode 133, the first upper static electricity passage part 134, the second The upper electrostatic passage 135, the first upper variable resistor 136, the second upper variable resistor 137, and the upper ground electrode 138 Laminating unit 141 is configured.

The composite part in Reference Example 3 having the above configuration has the same effect as the composite part in the first embodiment.

In the first embodiment, the inductor unit is a common mode noise filter. However, the inductor unit is not limited to the common mode noise filter, and other than a two mode noise filter or a noise filter that moderately removes both common mode noise and normal mode noise. It may be an inductor. Even in this case, the magnetic flux is disturbed due to the presence of the electrostatic passage portion, and the characteristics of the inductor portion are deteriorated. Therefore, as in the present embodiment, the positions of the electrostatic passage portions above and below the inductor portion are viewed in a plan view in the stacking direction. If the same position is obtained, deterioration can be suppressed.

  In addition, the magnetic properties of the inductor can be improved by basically using a magnetic material for the insulating sheet. For example, in the case of a common mode noise filter, a magnetic flux that magnetically couples two coils passes. Depending on the specific function and configuration of the inductor part, the magnetic material is used for the part to be used, and the non-magnetic material is used for the part through which the magnetic flux that is not magnetically coupled passes. A material may be used. In this case, only a part of the insulating sheet made of one magnetic material may be formed of a non-magnetic material.

Further, as shown in the first embodiment, the present invention can be applied to a so-called π-type or L-type structure, which is a single product or a combination of arrays. That is, it is possible to develop into a single product of π type, an array of π type, a single product of L type, and an array of L type. In addition, the static electricity passage portion can be made hollow for each configuration, and a voltage variable resistance material whose resistance value decreases when an overvoltage such as a varistor is applied can be used.

  The present invention can be applied to a composite part having an inductor function and a static electricity countermeasure function.

DESCRIPTION OF SYMBOLS 1 Insulating sheet 2 Insulating sheet 3 Insulating sheet 4 Insulating sheet 5 Insulating sheet 6 Insulating sheet 7 Insulating sheet 8 Insulating sheet 9 Insulating sheet 10 Insulating sheet 11 Lower ground electrode 12 Lower static electricity passage part 13 1st lower discharge electrode 14 2nd Lower discharge electrode 15 First extraction electrode 16 First coil 17 Connection electrode 18 Second coil 19 Connection electrode 20 Second extraction electrode 21 First upper discharge electrode 22 Second upper discharge electrode 23 Upper static electricity passage section 24 upper ground electrode 25 lower laminated part 26 inductor part 27 upper laminated part 28 first terminal 29 second terminal 30 third terminal 31 fourth terminal 32 first lower static electricity countermeasure part 33 first upper static electricity countermeasure part Section 34 Second upper static electricity countermeasure section 35 Second lower static electricity countermeasure section 40 Lower static electricity passage section 41 Upper electrostatic section Air passage portion 42 Lower electrostatic passage portion 43 Upper electrostatic passage portion 51 Insulating sheet 52 Insulating sheet 53 Insulating sheet 54 Insulating sheet 55 Insulating sheet 56 Insulating sheet 57 Insulating sheet 58 Insulating sheet 59 Insulating sheet 60 Insulating sheet 61 Insulating sheet 62 Insulating sheet 63 Insulating sheet 64 Insulating sheet 65 Insulating sheet 66 Insulating sheet 67 Insulating sheet 68 Insulating sheet 69 Insulating sheet 70 Insulating sheet 71 Lower ground electrode 72 First lower voltage variable resistor 73 Second lower voltage variable resistor 74 First lower part Electrostatic passage portion 75 Second lower electrostatic passage portion 76 First lower discharge electrode 77 Second lower discharge electrode 78 First extraction electrode 79 Second extraction electrode 80 First coil 81 Second coil 82 Third Coil 83 Fourth coil 84 Third extraction electrode 85 Fourth extraction electrode 86 First upper discharge electrode 87 Second upper discharge electrode 88 First upper electrostatic passage portion 89 Second upper electrostatic passage portion 90 First upper voltage variable resistor 91 Second upper portion Voltage variable resistor 92 Upper ground electrode 93 Lower laminated part 94 Inductor part 95 Upper laminated part 96 First lower static electricity countermeasure part 97 First upper static electricity countermeasure part 98 Second lower static electricity countermeasure part 99 Second upper static electricity countermeasure part Part 101 Insulating sheet 102 Insulating sheet 103 Insulating sheet 104 Insulating sheet 105 Insulating sheet 106 Insulating sheet 107 Insulating sheet 108 Insulating sheet 109 Insulating sheet 110 Insulating sheet 111 Insulating sheet 112 Insulating sheet 113 Insulating sheet 114 Insulating sheet 115 Insulating sheet 116 Insulating sheet 117 Insulation sheet 118 Insulation sheet G 119 Insulating sheet 120 Insulating sheet 121 Lower ground electrode 122 First lower variable resistor 123 Second lower variable resistor 124 First lower static electricity passing portion 125 Second lower static electricity passing portion 126 First lower discharge electrode 127 Second lower discharge electrode 128 First extraction electrode 129 First coil 130 Second coil 131 Second extraction electrode 132 First upper discharge electrode 133 Second upper discharge electrode 134 First upper static electricity passage Part 135 Second upper static electricity passage part 136 First upper variable resistor 137 Second upper variable resistor 138 Upper ground electrode 139 Lower laminated part 140 Inductor part 141 Upper laminated part

Claims (1)

A lower laminated part in which a lower static electricity countermeasure part is formed;
An inductor portion laminated on the lower laminated portion;
An upper laminate portion laminated on the inductor portion and having an upper static electricity countermeasure portion formed thereon,
The axis of the coil constituting the inductor portion coincides with the stacking direction,
The lower static electricity countermeasure portion has one lower static electricity passage portion that normally functions as an insulator between a pair of electrodes and is energized when a voltage of a predetermined level or higher is applied,
The upper static electricity countermeasure portion has one upper static electricity passage portion that normally functions as an insulator between a pair of electrodes and is energized when a voltage of a predetermined level or higher is applied,
The one lower static electricity passing portion and the one upper static electricity passing portion are both arranged at positions shifted from the central axis of the coil,
The one lower static electricity passage portion and the one upper static electricity passage portion are composite parts formed at the same position when seen through from the stacking direction.

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