JP2007027568A - Multilayer capacitor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multilayer capacitor capable of easily and precisely controlling equivalent series resistors. <P>SOLUTION: In a laminate 1, a plurality of dielectric layers and first and second internal electrodes 41-44 and 61-64 are alternately laminated. The first internal electrodes 41-44 are electrically connected together through first connection conductors 7A and 7B. The first internal electrodes 41-44 are electrically connected to first terminal electrodes 3A-3D through drawn-out conductors 53A-53D, respectively. The second internal electrodes 61-64 are electrically connected together through second connection conductors 9A and 9B, respectively. The second internal electrodes 61-64 are electrically connected to second terminal electrodes 5A-5D through drawn-out conductors 73A-73D, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a multilayer capacitor.

  As this type of multilayer capacitor, one having a multilayer body in which a plurality of dielectric layers and a plurality of internal electrodes are alternately stacked and a plurality of terminal electrodes (terminal conductors) formed in the multilayer body is known. (For example, refer to Patent Document 1).

  In a power supply for supplying power to a central processing unit (CPU) mounted on a digital electronic device, the load current is increasing while the voltage is lowered. Therefore, it has become very difficult to keep the fluctuation of the power supply voltage within an allowable value against a sudden change in the load current, so that a multilayer capacitor called a decoupling capacitor is connected to the power supply. A current is supplied from the multilayer capacitor to the CPU when the load current changes transiently to suppress fluctuations in the power supply voltage.

In recent years, as the operating frequency of CPUs has further increased, the load current has become higher at higher speeds. For multilayer capacitors used as decoupling capacitors, the equivalent series resistance (ESR) has been increased along with the increase in capacity. There is a demand to increase the size. In the multilayer capacitor described in Patent Document 1, the terminal electrode has a multilayer structure including an internal resistance layer, thereby increasing the ESR.
JP 2004-047983 A

  However, the multilayer capacitor described in Patent Document 1 has the following problems when controlling the equivalent series resistance to a desired value. That is, in the multilayer capacitor described in Patent Document 1, in order to control the equivalent series resistance to a desired value, the thickness of the internal resistance layer included in the terminal electrode and the material composition of the internal resistance layer must be adjusted. In other words, it is very difficult to control the equivalent series resistance.

  An object of the present invention is to provide a multilayer capacitor capable of easily and accurately controlling an equivalent series resistance.

  By the way, in a general multilayer capacitor, all internal electrodes are connected to corresponding terminal electrodes (terminal conductors) via lead conductors. Therefore, there are as many lead conductors as the number of internal electrodes, and the equivalent series resistance is reduced. If the number of laminated dielectric layers and internal electrodes is increased in order to increase the capacity of the multilayer capacitor, the number of lead conductors also increases. Since the resistance component of the lead conductor is connected in parallel to the terminal electrode, the equivalent series resistance of the multilayer capacitor is further reduced as the number of lead conductors increases. Thus, increasing the capacity of a multilayer capacitor and increasing the equivalent series resistance are contradictory requirements.

  Therefore, the present inventors have intensively studied a multilayer capacitor that can satisfy the demand for increasing the capacity and increasing the equivalent series resistance. As a result, the present inventors can connect the internal electrodes with connection conductors formed on the surface of the multilayer body and change the number of lead conductors even if the number of stacked dielectric layers and internal electrodes is the same. A new fact has been found that the equivalent series resistance can be adjusted to a desired value. Further, the present inventors can connect the internal electrode with the connection conductor formed on the surface of the multilayer body and change the position of the lead conductor in the stacking direction of the multilayer body, so that the equivalent series resistance is set to a desired value. It came to discover the new fact that it became possible to adjust. In particular, if the number of lead conductors is smaller than the number of internal electrodes, adjustment in the direction of increasing the equivalent series resistance is possible.

  Based on such research results, the multilayer capacitor according to the present invention includes a multilayer body in which a plurality of dielectric layers and a plurality of internal electrodes are alternately stacked, and a plurality of external conductors formed on the side surface of the multilayer body. , Wherein the plurality of internal electrodes include a plurality of first internal electrodes and a plurality of second internal electrodes arranged alternately, and the plurality of external conductors include the plurality of first electrodes. A first outer conductor group including a plurality of terminal conductors and an even number of first connection conductors, and a second outer conductor group including a plurality of second terminal conductors and an even number of second connection conductors. The plurality of first and second terminal conductors are electrically insulated from each other, the even number of first and second connection conductors are electrically insulated from each other, and the plurality of first internal electrodes are respectively formed on the laminate. Electrically connected to each other via the even number of first connection conductors formed on the side surfaces, Each of the two internal electrodes is electrically connected to each other via an even number of second connection conductors formed on the side surface of the multilayer body, and the total number of the plurality of first terminal conductors among the plurality of first internal electrodes. Each of the first internal electrodes less than or equal to one less than the total number of the first internal electrodes is electrically connected to the plurality of first terminal conductors through the lead conductors, and the plurality of first internal electrodes. Each of the terminal conductors is electrically connected to at least one of the first internal electrodes electrically connected to the first terminal conductor via the lead conductor, and a plurality of second internal electrodes Second internal electrodes that are equal to or larger than the total number of second terminal conductors and equal to or smaller than the total number of second internal electrodes are electrically connected to a plurality of second terminal conductors via lead conductors, respectively. And the plurality of second terminal conductors are respectively , Electrically connected to at least one of the second inner electrodes electrically connected to the second terminal conductor via the lead conductor, and each conductor included in the first outer conductor group and the second The conductors included in the outer conductor group are arranged adjacent to each other in the direction of circulation along the side surface of the multilayer body, and are electrically connected to the first terminal conductor via the lead conductor. By adjusting at least one of the number of one internal electrode and the number of second internal electrodes electrically connected to the second terminal conductor via the lead conductor, the equivalent series resistance can be set to a desired value. It is characterized by being set.

  According to the multilayer capacitor described above, the number of first internal electrodes electrically connected to the first terminal conductor through the lead conductor and the second terminal conductor are electrically connected through the lead conductor. By adjusting at least one of the number of second internal electrodes, the equivalent series resistance is set to a desired value, so that the equivalent series resistance can be controlled easily and accurately. Further, according to the arrangement of the outer conductors such as the above-described multilayer capacitor, when the polarity of the first outer conductor group and the polarity of the second outer conductor group are reversed, the direction of wrapping along the side surface of the multilayer body , The conductors connected in opposite polarities are arranged next to each other. Therefore, the magnetic field generated due to the current flowing between the terminal conductor or connection conductor and the internal electrode is canceled out. As a result, the equivalent series inductance is reduced in this multilayer capacitor. Furthermore, since the number of connection conductors is an even number, even if connection conductors are further added to the configuration in which the first and second terminal conductors are arranged so that the equivalent series inductance is reduced, the equivalent series inductance is also improved. Will still be reduced.

  A multilayer capacitor according to the present invention includes a multilayer body in which a plurality of dielectric layers and a plurality of internal electrodes are alternately stacked, and a plurality of external conductors formed on a side surface of the multilayer body. The plurality of internal electrodes include a plurality of first internal electrodes and a plurality of second internal electrodes that are alternately arranged, and the plurality of external conductors are an even number of the plurality of first terminal conductors. A first outer conductor group including a first connection conductor; a second outer conductor group including a plurality of second terminal conductors and an even number of second connection conductors; The second terminal conductors are electrically insulated from each other, the even-numbered first and second connection conductors are electrically insulated from each other, and the plurality of first internal electrodes are each even-numbered formed on the side surface of the multilayer body. Are electrically connected to each other via the first connection conductors, and the plurality of second internal electrodes are respectively The first internal electrodes that are electrically connected to each other through the even number of second connection conductors formed on the side surface of the multilayer body and that are equal to or greater than the total number of the plurality of first terminal conductors among the plurality of first internal electrodes. Each of the first internal electrodes less than the total number of the first internal electrodes is electrically connected to the plurality of first terminal conductors via the lead conductors, and the plurality of first terminal conductors are respectively drawn out. Total number of a plurality of second terminal conductors among the plurality of second internal electrodes, electrically connected to at least one of the first internal electrodes electrically connected to the first terminal conductor via the conductor Each of the second internal electrodes, which is one less than the total number of the second internal electrodes, is electrically connected to the plurality of second terminal conductors through the lead conductors, and the plurality of second internal electrodes. The terminal conductors of the Each conductor included in the first outer conductor group and each conductor included in the second outer conductor group and electrically connected to at least one of the second inner electrodes electrically connected to the two terminal conductors Are arranged adjacent to each other in the direction of circulation along the side surface of the multilayer body, and are electrically connected to the first terminal conductor via the lead conductor. By adjusting the position in the stacking direction and at least one position in the stacking direction of the stack of the second internal electrodes electrically connected to the second terminal conductor via the lead conductor, the equivalent series The resistance is set to a desired value.

  According to the multilayer capacitor described above, the position in the stacking direction of the multilayer body of the first internal electrode electrically connected to the first terminal conductor via the lead conductor and the second terminal conductor via the lead conductor Since the equivalent series resistance is set to a desired value by adjusting at least one position in the stacking direction of the stack of the second internal electrodes electrically connected to the control circuit, the equivalent series resistance is controlled. Can be easily and accurately performed. Further, according to the arrangement of the outer conductors such as the above-described multilayer capacitor, when the polarity of the first outer conductor group and the polarity of the second outer conductor group are reversed, the direction of wrapping along the side surface of the multilayer body , The conductors connected in opposite polarities are arranged next to each other. Therefore, the magnetic field generated due to the current flowing between the terminal conductor or connection conductor and the internal electrode is canceled out. As a result, the equivalent series inductance is reduced in this multilayer capacitor. Furthermore, since the number of connection conductors is an even number, even if connection conductors are further added to the configuration in which the first and second terminal conductors are arranged so that the equivalent series inductance is reduced, the equivalent series inductance is also improved. Will still be reduced.

  For example, a part of the even number of first connection conductors and a part of the even number of second connection conductors are formed on the first side surface of the side surfaces parallel to the stacking direction of the multilayer body. On the second side surface parallel to the direction and facing the first side surface, on the first side surface, the remaining first connection conductors other than the first connection conductor formed on the first side surface The remaining second connection conductors other than the formed second connection conductor are formed, and the sum of the first connection conductor and the second connection conductor formed on the first side surface and the second side surface are formed on the second side surface. Any of the sum of the formed first connection conductor and second connection conductor may be an even number.

  For example, there are two even-numbered first connection conductors, one of which is formed on the first side surface and the other one on the second side surface. Are formed at positions that are line-symmetric with respect to the central axis in the stacking direction, and there are two even-numbered second connection conductors, one of which is on the first side surface and the other is the second. The two second connection conductors may be formed at positions that are line-symmetric with respect to the central axis in the stacking direction of the stacked body.

  The plurality of first and second terminal conductors are formed on a side surface different from the side surface on which the first connection conductor or the second connection conductor is formed among the side surfaces parallel to the stacking direction of the multilayer body. It is preferable. By forming the terminal conductor and the connection conductor on different side surfaces in this way, a short circuit between the first terminal conductor and the second connection conductor and the connection between the second terminal conductor and the first connection conductor. The occurrence of a short circuit can be suppressed.

  In this case, for example, among the side surfaces parallel to the stacking direction of the multilayer body, a plurality of first and second sides formed on a side surface different from the side surface on which the first connection conductor or the second connection conductor is formed. The sum of the terminal conductors may be an even number.

  ADVANTAGE OF THE INVENTION According to this invention, the multilayer capacitor which can control an equivalent series resistance easily and accurately can be provided.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted. In the description, the terms “upper” and “lower” may be used, which correspond to the vertical direction of each figure.

(First embodiment)
With reference to FIG.1 and FIG.2, the structure of the multilayer capacitor C1 which concerns on 1st Embodiment is demonstrated. FIG. 1 is a perspective view of the multilayer capacitor in accordance with the first embodiment. FIG. 2 is an exploded perspective view of the multilayer body included in the multilayer capacitor in accordance with the first embodiment.

  As shown in FIG. 1, the multilayer capacitor C <b> 1 according to the first embodiment includes a multilayer body 1 having a substantially rectangular parallelepiped shape and a plurality of external conductors formed on the multilayer body 1. The plurality of outer conductors have a first outer conductor group and a second outer conductor group. The first outer conductor group includes a plurality (four in this embodiment) of first terminal electrodes (first terminal conductors) 3A to 3D and an even number (two in this embodiment) of first terminals. Connection conductors 7A and 7B. The second outer conductor group includes a plurality (four in this embodiment) of second terminal electrodes (second terminal conductors) 5A to 5D and an even number (two in this embodiment) of second terminals. Connection conductors 9A and 9B.

  The first connection conductor 7A and the second connection conductor 9A are located on the first side surface 1a among the first to fourth side surfaces 1a to 1d parallel to the stacking direction of the multilayer body 1 to be described later, The first connection conductor 7A and the second connection conductor 9A are formed in this order from the side surface 1d side to the third side surface 1c side. In this way, a part (one in this embodiment) of the two first connection conductors 7A and 7B and a part of the two second connection conductors 9A and 9B. (In this embodiment, one) second connection conductor 9A is formed on the first side face 1a, and the sum thereof is an even number (two).

  The first connection conductor 7B and the second connection conductor 9B are located on the second side surface 1b facing the first side surface 1a among the side surfaces 1a to 1d parallel to the stacking direction of the multilayer body 1, The first connection conductor 7B and the second connection conductor 9B are formed in this order from the side surface 1c side toward the fourth side surface 1d side. As described above, the first connection conductor 7B other than the first connection conductor 7A formed on the first side surface 1a (one in the present embodiment) and the first side surface 1a are formed. The remaining second connection conductor 9B other than the second connection conductor 9A (one in the present embodiment) is formed on the second side surface 1b, and the sum thereof is an even number (two). .

  Further, the first connection conductor 7 </ b> A and the first connection conductor 7 </ b> B are formed at positions that are line-symmetric with respect to the central axis in the stacking direction of the multilayer body 1. The second connection conductor 9 </ b> A and the second connection conductor 9 </ b> B are formed at positions that are line-symmetric with respect to the central axis in the stacking direction of the multilayer body 1. The first connection conductors 7A and 7B and the second connection conductors 9A and 9B are electrically insulated from each other.

  The first terminal electrodes 3A, 3B and the second terminal electrodes 5A, 5B are located on the third side surface 1c side of the multilayer body 1, and from the first side surface 1a side to the second side surface 1b side, The first terminal electrode 3A, the second terminal electrode 5A, the first terminal electrode 3B, and the second terminal electrode 5B are formed in this order.

  The first terminal electrodes 3C, 3D and the second terminal electrodes 5C, 5D are located on the fourth side surface 1d side of the multilayer body 1, and from the second side surface 1b side to the first side surface 1a side, The first terminal electrode 3C, the second terminal electrode 5C, the first terminal electrode 3D, and the second terminal electrode 5D are formed in this order.

  Thus, on the first to fourth side surfaces 1a to 1d of the stacked body 1, the side surfaces (first, third, second, and fourth) of the stacked body 1 parallel to the stacking direction of the stacked body 1 are obtained. Each of the conductors (first terminal electrodes 3A to 3D and the first connection) included in the first outer conductor group with respect to a direction that circulates along the side surfaces 1a, 1c, 1b, and 1d) so as to intersect the lamination direction. The conductors 7A and 7B) and the respective conductors (second terminal electrodes 5A to 5D and second connection conductors 9A and 9B) included in the second outer conductor group are alternately arranged so as to be adjacent to each other.

  Further, when focusing on only the first and second terminal electrodes 3A to 3D and 5A to 5D except for the first and second connection conductors 7A, 7B, 9A, and 9B, the first and second terminal electrodes 3A to 3D. 5A to 5D intersect the stacking direction along the side surfaces (first, third, second, and fourth side surfaces 1a, 1c, 1b, and 1d) of the stacked body 1 parallel to the stacking direction of the stacked body 1. Thus, the first terminal electrode and the second terminal electrode are arranged alternately with respect to the direction in which they circulate.

  The first and second terminal electrodes 3 </ b> A to 3 </ b> D and 5 </ b> A to 5 </ b> D are formed with the first connection conductors 7 </ b> A and 7 </ b> B or the second connection conductors 9 </ b> A and 9 </ b> B among the side surfaces parallel to the stacking direction of the multilayer body 1. It is formed on third and fourth side surfaces 1c and 1d different from the first and second side surfaces 1a and 1b. The sum of the first terminal electrodes 3A and 3B and the second terminal electrodes 5A and 5B formed on the third side surface 1c is 4 and an even number. The sum of the first terminal electrodes 3C and 3D and the second terminal electrodes 5C and 5D formed on the fourth side surface 1d is 4 and an even number.

  The first terminal electrodes 3A to 3D and the second terminal electrodes 5A to 5D are electrically insulated from each other.

  As shown in FIG. 2, the multilayer body 1 includes a plurality (25 layers in this embodiment) of dielectric layers 11 to 35 and a plurality (12 layers in this embodiment) of first and second layers. The internal electrodes 41 to 52 and 61 to 72 are alternately stacked. The actual multilayer capacitor C1 is integrated so that the boundary between the dielectric layers 11 to 35 is not visible.

  Each of the first inner electrodes 41 to 52 has a substantially rectangular shape. The first inner electrodes 41 to 52 are respectively formed at positions having a predetermined interval from a side surface parallel to the stacking direction of the dielectric layers 11 to 35 (hereinafter simply referred to as “stacking direction”) of the stacked body 1. Has been. Each of the first inner electrodes 41 to 52 extends so as to be drawn to the first side face 1a of the multilayer body 1 and to be drawn to the second side face 1b of the multilayer body 1 respectively. The lead conductors 81B to 92B are formed.

  Each of the lead conductors 81A to 92A is formed integrally with the corresponding first inner electrode 41 to 52, and extends from the first inner electrode 41 to 52 so as to face the first side surface 1a of the multilayer body 1. It is growing. Each of the lead conductors 81B to 92B is formed integrally with the corresponding first inner electrode 41 to 52, and extends from the first inner electrode 41 to 52 so as to face the second side surface 1b of the multilayer body 1. It is growing.

  The first inner electrodes 41 to 52 are electrically connected to the first connection conductor 7A via lead conductors 81A to 92A, respectively. The first inner electrodes 41 to 52 are electrically connected to the first connection conductor 7B via lead conductors 81B to 92B, respectively. Thereby, the first inner electrodes 41 to 52 are electrically connected to each other via the first connection conductors 7A and 7B.

  The first inner electrodes 41 and 42 are formed with respective lead conductors 53A and 53B extending so as to be drawn to the third side surface 1c of the multilayer body 1. The first inner electrodes 43 and 44 are formed with respective lead conductors 53C and 53D extending so as to be drawn to the fourth side surface 1d of the multilayer body 1.

  The lead conductor 53A is formed integrally with the first internal electrode 41, and extends from the first internal electrode 41 so as to face the third side surface 1c of the multilayer body 1. The lead conductor 53B is formed integrally with the first internal electrode 42 and extends from the first internal electrode 42 so as to face the third side surface 1c of the multilayer body 1. The lead conductor 53C is formed integrally with the first internal electrode 43, and extends from the first internal electrode 43 so as to face the fourth side surface 1d of the multilayer body 1. The lead conductor 53D is formed integrally with the first internal electrode 44, and extends from the first internal electrode 44 so as to face the fourth side surface 1d of the multilayer body 1.

  The first inner electrode 41 is electrically connected to the first terminal electrode 3A through the lead conductor 53A. The first internal electrode 42 is electrically connected to the first terminal electrode 3B through the lead conductor 53B. The first internal electrode 43 is electrically connected to the first terminal electrode 3C through the lead conductor 53C. The first internal electrode 44 is electrically connected to the first terminal electrode 3D through the lead conductor 53D.

  Since the first inner electrodes 41 to 52 are electrically connected to each other via the first connection conductors 7A and 7B, the first inner electrodes 45 to 52 are also electrically connected to the first terminal electrodes 3A to 3D. Thus, the first internal electrodes 41 to 52 are connected in parallel.

  Each of the second inner electrodes 61 to 72 has a substantially rectangular shape. The second internal electrodes 61 to 72 are respectively formed at positions having a predetermined interval from the side surface parallel to the stacking direction of the stacked body 1. Each of the second inner electrodes 61 to 72 extends to be drawn to the first side surface 1a of the multilayer body 1 and to be drawn to the second side surface 1b of the multilayer body 1 respectively. The lead conductors 101B to 112B are formed.

  Each of the lead conductors 101A to 112A is formed integrally with the corresponding second inner electrode 61 to 72, and extends from the second inner electrode 61 to 72 so as to face the first side surface 1a of the multilayer body 1. It is growing. Each of the lead conductors 101B to 112B is formed integrally with the corresponding second inner electrode 61 to 72, and extends from the second inner electrode 61 to 72 so as to face the second side surface 1b of the multilayer body 1. It is growing.

  The second inner electrodes 61 to 72 are electrically connected to the second connection conductor 9A through the lead conductors 101A to 112A, respectively. The second inner electrodes 61 to 72 are electrically connected to the second connection conductor 9B via the lead conductors 101B to 112B, respectively. Thereby, the first inner electrodes 61 to 72 are electrically connected to each other via the second connection conductors 9A and 9B.

  The second inner electrodes 61 and 62 are formed with respective lead conductors 73A and 73B extending so as to be drawn to the third side face 1c of the multilayer body 1. The second inner electrodes 63 and 64 are formed with respective lead conductors 73C and 73D extending so as to be drawn to the fourth side surface 1d of the multilayer body 1 respectively.

  The lead conductor 73A is formed integrally with the second internal electrode 61, and extends from the second internal electrode 61 so as to face the third side surface 1c of the multilayer body 1. The lead conductor 73B is formed integrally with the second internal electrode 62, and extends from the second internal electrode 62 so as to face the third side surface 1c of the multilayer body 1. The lead conductor 73 </ b> C is formed integrally with the second internal electrode 63 and extends from the second internal electrode 63 so as to face the fourth side surface 1 d of the multilayer body 1. The lead conductor 73D is formed integrally with the second inner electrode 64, and extends from the second inner electrode 64 so as to face the fourth side surface 1d of the multilayer body 1.

  The second internal electrode 61 is electrically connected to the second terminal electrode 5A through the lead conductor 73A. The second internal electrode 62 is electrically connected to the second terminal electrode 5B through the lead conductor 73B. The second internal electrode 63 is electrically connected to the second terminal electrode 5C through the lead conductor 73C. The second inner electrode 64 is electrically connected to the second terminal electrode 5D through the lead conductor 73D.

  Since the second inner electrodes 61 to 72 are electrically connected to each other via the second connection conductors 9A and 9B, the second inner electrodes 65 to 72 are also electrically connected to the second terminal electrodes 5A to 5D. Therefore, the second internal electrodes 61 to 72 are connected in parallel.

  In the multilayer capacitor C1, the number of the first inner electrodes 41 to 44 that are directly connected to the first terminal electrodes 3A to 3D via the lead conductors 53A to 53D is four, and the first inner electrodes 41 to 52 are connected to each other. It is less than the total number (12 in this embodiment). Further, the number of second internal electrodes 61 to 64 directly connected to the second terminal electrodes 5A to 5D through the lead conductors 73A to 73D is four, and the total number of second internal electrodes 61 to 72 (the number In the embodiment, it is less than 12).

  Focusing on the first terminal electrode 3A, the resistance components of the first connecting conductors 7A and 7B are respectively connected in series to the first terminal electrode 3A.

  Focusing on the first terminal electrode 3B, the resistance components of the first connection conductors 7A and 7B are located on one side in the stacking direction with respect to the first internal electrode 42 with the first internal electrode 42 as a boundary. It is divided into a resistance component of the first connection conductors 7A and 7B located and a resistance component of the first connection conductors 7A and 7B located on the other side in the stacking direction from the first internal electrode 42. These resistance components are connected in parallel to the first terminal electrode 3B.

  Focusing on the first terminal electrode 3C, the resistance components of the first connecting conductors 7A and 7B are respectively located on one side in the stacking direction from the first internal electrode 43 with the first internal electrode 43 as a boundary. It is divided into a resistance component of the first connection conductors 7A and 7B located and a resistance component of the first connection conductors 7A and 7B located on the other side in the stacking direction from the first internal electrode 43. These resistance components are connected in parallel to the first terminal electrode 3C.

  Focusing on the first terminal electrode 3D, the resistance components of the first connection conductors 7A and 7B are located on one side in the stacking direction from the first internal electrode 44 with the first internal electrode 44 as a boundary. It is divided into a resistance component of the first connection conductors 7A and 7B located and a resistance component of the first connection conductors 7A and 7B located on the other side in the stacking direction from the first internal electrode 44. These resistance components are connected in parallel to the first terminal electrode 3D.

  On the other hand, when focusing on the second terminal electrode 5A, each of the resistance components of the second connection conductors 9A and 9B is one of the second internal electrodes 61 in the stacking direction with respect to the second internal electrode 61 as a boundary. It is divided into a resistance component of the second connection conductors 9A and 9B located on the side and a resistance component of the second connection conductors 9A and 9B located on the other side in the stacking direction from the second internal electrode 61. These resistance components are connected in parallel to the second terminal electrode 5A.

  Focusing on the second terminal electrode 5B, the resistance components of the second connection conductors 9A and 9B are respectively located on one side in the stacking direction from the second internal electrode 62 with the second internal electrode 62 as a boundary. It is divided into a resistance component of the second connection conductors 9A and 9B located and a resistance component of the second connection conductors 9A and 9B located on the other side in the stacking direction with respect to the second internal electrode 62. These resistance components are connected in parallel to the second terminal electrode 5B.

  Focusing on the second terminal electrode 5C, the resistance components of the second connection conductors 9A and 9B are respectively located on one side in the stacking direction with respect to the second internal electrode 73 with the second internal electrode 73 as a boundary. It is divided into a resistance component of the second connection conductors 9A and 9B located and a resistance component of the second connection conductors 9A and 9B located on the other side in the stacking direction with respect to the second internal electrode 73. These resistance components are connected in parallel to the second terminal electrode 5C.

  Focusing on the second terminal electrode 5D, the resistance components of the second connection conductors 9A and 9B are respectively located on one side in the stacking direction with respect to the second internal electrode 64 with the second internal electrode 64 as a boundary. It is divided into a resistance component of the second connection conductors 9A and 9B located and a resistance component of the second connection conductors 9A and 9B located on the other side in the stacking direction with respect to the second internal electrode 64. These resistance components are connected in parallel to the second terminal electrode 5D.

  As a result, the multilayer capacitor C1 has an equivalent series resistance greater than that of a conventional multilayer capacitor in which all internal electrodes are connected to corresponding terminal electrodes via lead conductors.

  As described above, according to the present embodiment, the number of first internal electrodes 41 to 44 electrically connected to the first terminal electrodes 3A to 3D via the lead conductors 53A to 53D and the lead conductors 73A to 73A. By adjusting the number of second internal electrodes 61 to 64 electrically connected to the second terminal electrodes 5A to 5D via 73D, the equivalent series resistance of the multilayer capacitor C1 is set to a desired value. Therefore, the equivalent series resistance can be controlled easily and accurately.

  In addition, the first external conductor group in the direction of wrapping around the first to fourth side surfaces 1a to 1d of the multilayer body 1 so as to intersect the lamination direction along the side surfaces parallel to the lamination direction of the multilayer body 1 Conductors (first terminal electrodes 3A to 3D and first connection conductors 7A and 7B) and conductors included in the second external conductor group (second terminal electrodes 5A to 5D and second terminal electrodes). The connecting conductors 9A and 9B) are arranged adjacent to each other.

  That is, on the first side face 1a, the first connection conductors 7A and the second connection conductors 9A are alternately arranged in this order in the direction from the fourth side face 1d to the third side face 1c. On the second side surface 1b, the first connection conductors 7B and the second connection conductors 9B are alternately arranged in this order in the direction from the third side surface 1c to the fourth side surface 1d. On the third side surface 1c, the first terminal electrode 3A, the second terminal electrode 5A, the first terminal electrode 3B, and the second terminal are arranged in the direction from the first side surface 1a to the second side surface 1b. The electrodes 5B are alternately arranged in this order. On the fourth side surface 1d, the first terminal electrode 3C, the second terminal electrode 5C, the first terminal electrode 3D, and the second terminal in the direction from the second side surface 1b to the first side surface 1a. The electrodes 5D are alternately arranged in this order.

  Therefore, the polarity of the first outer conductor group (first terminal electrodes 3A to 3D and first connection conductors 7A and 7B) and the second outer conductor group (second terminal electrodes 5A to 5D and second connection). When the polarities of the conductors 9A and 9B) are connected in reverse, the terminal electrodes or connecting conductors connected in the reverse polarity are adjacent to each other when viewed in the direction of circulation along the side surface of the multilayer body 1. As a result, the lead conductors 53A to 53D, 81A to 92A, 81B to 92B, 73A to 73D, 101A to 112A, and 101B to 112B adjacent to each other in the direction that circulates along the side surface of the multilayer body 1 have mutually opposite currents. Will flow. As a result, the magnetic field generated due to these currents is canceled out, and the equivalent series inductance is reduced in the multilayer capacitor C1.

  Further, when focusing on only the first and second terminal electrodes 3A to 3D and 5A to 5D except for the first and second connection conductors 7A, 7B, 9A, and 9B, the first and second terminal electrodes 3A to 3A 3D, 5A to 5D are the stacking directions along the side surfaces (first, third, second, and fourth side surfaces 1a, 1c, 1b, and 1d) of the stacked body 1 parallel to the stacking direction of the stacked body 1. The first terminal electrodes and the second terminal electrodes are alternately arranged with respect to the direction of winding so as to intersect. Therefore, the first and second terminal electrodes 3A to 3D and 5A to 5D are arranged so that the magnetic field generated by the current flowing through the lead conductor connected to each terminal electrode is canceled and the equivalent series inductance is reduced. It has become. Since the first and second connection conductors 7A, 7B, 9A, and 9B are even numbers, the first and second terminal conductors 3A to 3D and 5A to 5D are arranged so that the equivalent series inductance is reduced. Even if a connection conductor is further added to the multilayer capacitor C1, the equivalent series inductance is still reduced.

  In addition, the first and second terminal electrodes 3A to 3D, 5A to 5D have first and second side surfaces 1a on which the first connection conductors 7A and 7B or the second connection conductors 9A and 9B are formed. It is formed on third and fourth side surfaces 1c and 1d different from 1b. Thus, in the multilayer capacitor C1, since the terminal electrodes 3A to 3D, 5A to 5D and the connection conductors 7A, 7B, 9A, and 9B are formed on different side surfaces, the first terminal electrodes 3A to 3D and the second terminals The occurrence of a short circuit between the connection conductors 9A and 9B and a short circuit between the second terminal electrodes 5A to 5D and the first connection conductors 7A and 7B are suppressed.

  In the present embodiment, the first internal electrodes 41 to 52 are connected in parallel, and the second internal electrodes 61 to 72 are connected in parallel. As a result, even if the resistance values of the first internal electrodes 41 to 52 and the second internal electrodes 61 to 72 are varied, there is little influence on the equivalent series resistance in the entire multilayer capacitor C1, and the equivalent series resistance is reduced. It is possible to suppress a decrease in control accuracy.

(Second Embodiment)
The configuration of the multilayer capacitor in accordance with the second embodiment will be described with reference to FIG. The multilayer capacitor in accordance with the second embodiment includes the number of first internal electrodes electrically connected to the first terminal electrodes 3A to 3D via the lead conductors 53A to 53D and the lead conductors 73A to 73D. The multilayer capacitor C1 according to the first embodiment is different from the multilayer capacitor C1 according to the first embodiment in terms of the number of second internal electrodes electrically connected to the second terminal electrodes 5A to 5D. FIG. 3 is an exploded perspective view of the multilayer body included in the multilayer capacitor in accordance with the second embodiment.

  Although not shown, the multilayer capacitor in accordance with the second embodiment is similar to the multilayer capacitor C1 in accordance with the first embodiment, and the multilayer body 1 and the first terminal electrodes 3A to 3D formed on the multilayer body 1. Also, second terminal electrodes 5A to 5D that are also formed on the multilayer body 1 and first and second connection conductors 7A, 7B, 9A, and 9B that are also formed on the multilayer body 1 are provided.

  In the multilayer capacitor according to the second embodiment, as shown in FIG. 3, each lead conductor 53 </ b> A extending to be drawn to the third side surface 1 c of the multilayer body 1 with respect to each first internal electrode 49, 50, 53B is formed. Respective lead conductors 53C and 53D extending so as to be drawn to the fourth side surface 1d of the multilayer body 1 are formed for the first inner electrodes 51 and 52, respectively.

  The lead conductor 53A is formed integrally with the first internal electrode 49, and extends from the first internal electrode 49 so as to face the third side surface 1c of the multilayer body 1. The lead conductor 53B is formed integrally with the first internal electrode 50, and extends from the first internal electrode 50 so as to face the third side surface 1c of the multilayer body 1. The lead conductor 53C is formed integrally with the first internal electrode 51, and extends from the first internal electrode 51 so as to face the fourth side surface 1d of the multilayer body 1. The lead conductor 53D is formed integrally with the first internal electrode 52, and extends from the first internal electrode 52 so as to face the fourth side surface 1d of the multilayer body 1.

  The first internal electrode 49 is electrically connected to the first terminal electrode 3A through the lead conductor 53A. The first internal electrode 50 is electrically connected to the first terminal electrode 3B through the lead conductor 53B. The first internal electrode 51 is electrically connected to the first terminal electrode 3C through the lead conductor 53C. The first inner electrode 52 is electrically connected to the first terminal electrode 3D through the lead conductor 53D.

  Respective lead conductors 73A and 73B extending so as to be drawn to the third side surface 1c of the multilayer body 1 are formed for the second inner electrodes 69 and 70, respectively. Respective lead conductors 73C and 73D extending so as to be drawn to the fourth side surface 1d of the multilayer body 1 are formed with respect to the second inner electrodes 71 and 72, respectively.

  The lead conductor 73A is formed integrally with the second internal electrode 69, and extends from the second internal electrode 69 so as to face the third side surface 1c of the multilayer body 1. The lead conductor 73B is formed integrally with the second internal electrode 70, and extends from the second internal electrode 70 so as to face the third side surface 1c of the multilayer body 1. The lead conductor 73 </ b> C is formed integrally with the second inner electrode 71 and extends from the second inner electrode 71 so as to face the fourth side surface 1 d of the multilayer body 1. The lead conductor 73D is formed integrally with the second internal electrode 72, and extends from the second internal electrode 72 so as to face the fourth side surface 1d of the multilayer body 1.

  The second internal electrode 69 is electrically connected to the second terminal electrode 5A through the lead conductor 73A. The second internal electrode 70 is electrically connected to the second terminal electrode 5B through the lead conductor 73B. The second internal electrode 71 is electrically connected to the second terminal electrode 5C through the lead conductor 73C. The second internal electrode 72 is electrically connected to the second terminal electrode 5D through the lead conductor 73D.

  In the multilayer capacitor in accordance with the second embodiment, the number of first internal electrodes 41 to 44, 49 to 52 directly connected to the first terminal electrodes 3A to 3D via the lead conductors 53A to 53D is eight, The total number of first internal electrodes 41 to 52 is smaller. In addition, the number of second internal electrodes 61 to 64 and 69 to 72 directly connected to the second terminal electrodes 5A to 5D via the lead conductors 73A to 73D is eight, and the second internal electrodes 61 to 72 are provided. Has been less than the total number of. Therefore, the multilayer capacitor according to the second embodiment has an equivalent series resistance that is greater than that of a conventional multilayer capacitor in which all internal electrodes are connected to corresponding terminal electrodes via lead conductors.

  The multilayer capacitor in accordance with the second embodiment includes first internal electrodes 41 to 44, 49 to 49 that are directly connected to the first terminal electrodes 3A to 3D via lead conductors 53A to 53D, as compared to the multilayer capacitor C1. The number 52 is large, and these lead conductors 53A to 53D are connected in parallel to the corresponding first terminal electrodes 3A to 3D. Further, the number of second internal electrodes 61 to 64 and 69 to 72 that are directly connected to the second terminal electrodes 5A to 5D via the lead conductors 73A to 73D is large, and these lead conductors 73A to 73D correspond. The second terminal electrodes 5A to 5D are connected in parallel. Therefore, the equivalent series resistance of the multilayer capacitor according to the second embodiment is smaller than the equivalent series resistance of the multilayer capacitor C1.

  As described above, according to the present embodiment, the number of first internal electrodes 41 to 44, 47 to 50 electrically connected to the first terminal electrodes 3A to 3D via the lead conductors 53A to 53D By adjusting the number of second internal electrodes 61 to 64 and 67 to 70 electrically connected to the second terminal electrodes 5A to 5B through the lead conductors 73A to 73D, respectively, the equivalent series of the multilayer capacitors Since the resistance is set to a desired value, it is possible to easily and accurately control the equivalent series resistance.

  In addition, on the first to fourth side surfaces 1 a to 1 d of the multilayer body 1, the first outer conductor in the direction of wrapping around the side surface parallel to the stacking direction of the multilayer body 1 so as to intersect the stacking direction. Each conductor (first terminal electrodes 3A to 3D and first connecting conductors 7A and 7B) included in the group, and each conductor (second terminal electrodes 5A to 5D and second terminal conductors included in the second external conductor group) The connecting conductors 9A and 9B) are arranged adjacent to each other. Therefore, the polarity of the first outer conductor group (first terminal electrodes 3A to 3D and first connection conductors 7A and 7B) and the second outer conductor group (second terminal electrodes 5A to 5D and second connection). When the polarities of the conductors 9A and 9B) are reversed, the terminal electrodes or connecting conductors connected to the opposite polarity are alternately arranged so as to be adjacent to each other when viewed in the direction of circulation along the side surface of the multilayer body 1 Will be. As a result, currents in opposite directions flow in the lead conductors adjacent to each other in the direction of circulation along the side surface of the multilayer body 1. As a result, the magnetic fields generated due to these currents are canceled out, and the equivalent series inductance is reduced in the multilayer capacitor according to the second embodiment.

  In the multilayer capacitor according to the second embodiment, since the terminal electrodes 3A to 3D, 5A to 5D and the connection conductors 7A, 7B, 9A, and 9B are formed on different side surfaces, the first terminal electrodes 3A to 3A to Generation | occurrence | production of the short circuit between 3D and 2nd connection conductor 9A, 9B and the short circuit between 2nd terminal electrode 5A-5D and 1st connection conductor 7A, 7B is suppressed.

(Third embodiment)
A configuration of the multilayer capacitor in accordance with the third embodiment will be described with reference to FIG. In the multilayer capacitor according to the third embodiment, the positions of the first internal electrodes that are electrically connected to the first terminal electrodes 3A to 3D via the lead conductors 53A to 53D in the stacking direction, and the lead conductors 73A to 73D. The multilayer capacitor C1 according to the first embodiment is different from the multilayer capacitor C1 according to the first embodiment in that the second internal electrode is electrically connected to the second terminal electrodes 5A to 5D through a position in the stacking direction. FIG. 4 is an exploded perspective view of the multilayer body included in the multilayer capacitor in accordance with the third embodiment.

  Although the multilayer capacitor according to the third embodiment is not shown, the multilayer capacitor 1 and the first terminal electrodes 3A to 3D formed in the multilayer capacitor 1 are the same as the multilayer capacitor C1 according to the first embodiment. The second terminal electrodes 5A to 5D, which are also formed in the multilayer body 1, and are formed in the multilayer body 1, and the first and second connection conductors 7A, 7B, 9A, 9B are provided.

  In the multilayer capacitor in accordance with the third embodiment, as shown in FIG. 4, the first internal electrodes 43 and 44 are not directly connected to the first terminal electrode via the lead conductor. In the multilayer capacitor in accordance with the third embodiment, the respective lead conductors 53C, 53D extending so as to be drawn to the fourth side surface 1d of the multilayer body 1 are formed for the respective first internal electrodes 51, 52.

  The lead conductor 53C is formed integrally with the first internal electrode 51, and extends from the first internal electrode 51 so as to face the fourth side surface 1d of the multilayer body 1. The lead conductor 53D is formed integrally with the first internal electrode 52, and extends from the first internal electrode 52 so as to face the fourth side surface 1d of the multilayer body 1.

  The first internal electrode 51 is electrically connected to the first terminal electrode 3C through the lead conductor 53C. The first inner electrode 52 is electrically connected to the first terminal electrode 3D through the lead conductor 53D.

  In the multilayer capacitor in accordance with the third embodiment, the second inner electrodes 63 and 64 are not directly connected to the second terminal electrode via the lead conductor. In the multilayer capacitor in accordance with the third embodiment, the respective lead conductors 73C, 73D extending so as to be drawn to the fourth side surface 1d of the multilayer body 1 are formed with respect to the respective second internal electrodes 71, 72.

  The lead conductor 73 </ b> C is formed integrally with the second inner electrode 71 and extends from the second inner electrode 71 so as to face the fourth side surface 1 d of the multilayer body 1. The lead conductor 73D is formed integrally with the second internal electrode 72, and extends from the second internal electrode 72 so as to face the fourth side surface 1d of the multilayer body 1.

  The second internal electrode 71 is electrically connected to the second terminal electrode 5C through the lead conductor 73C. The second internal electrode 72 is electrically connected to the second terminal electrode 5D through the lead conductor 73D.

  In the multilayer capacitor in accordance with the third embodiment, the number of first internal electrodes 41, 42, 51, 52 directly connected to the first terminal electrodes 3A-3D via the lead conductors 53A-53D is four, The total number of first internal electrodes 41 to 52 is reduced to 12 (in this embodiment, 12). Further, the number of second internal electrodes 61, 62, 71, 72 directly connected to the second terminal electrodes 5A-5D via the lead conductors 73A-73D is four, and the second internal electrodes 61-72. Is less than the total number (12 in this embodiment). As a result, the multilayer capacitor according to the third embodiment has an equivalent series resistance greater than that of a conventional multilayer capacitor in which all internal electrodes are connected to corresponding terminal electrodes via lead conductors.

  By the way, paying attention to the first terminal electrode 3A, the resistance components of the first connecting conductors 7A and 7B are respectively connected in series to the first terminal electrode 3A.

  Focusing on the first terminal electrode 3B, the resistance components of the first connection conductors 7A and 7B are located on one side in the stacking direction with respect to the first internal electrode 42 with the first internal electrode 42 as a boundary. It is divided into a resistance component of the first connection conductors 7A and 7B located and a resistance component of the first connection conductors 7A and 7B located on the other side in the stacking direction from the first internal electrode 42. These resistance components are connected in parallel to the first terminal electrode 3B.

  Focusing on the first terminal electrode 3C, the resistance components of the first connection conductors 7A and 7B are respectively located on one side in the stacking direction with respect to the first internal electrode 51 with the first internal electrode 51 as a boundary. It is divided into a resistance component of the first connection conductors 7A and 7B located and a resistance component of the first connection conductors 7A and 7B located on the other side in the stacking direction from the first internal electrode 51. These resistance components are connected in parallel to the first terminal electrode 3C.

  Focusing on the first terminal electrode 3D, the resistance components of the first connection conductors 7A and 7B are respectively located on one side in the stacking direction from the first internal electrode 52 with the first internal electrode 52 as a boundary. It is divided into a resistance component of the first connection conductors 7A and 7B located and a resistance component of the first connection conductors 7A and 7B located on the other side in the stacking direction from the first internal electrode 52. These resistance components are connected in parallel to the first terminal electrode 3D.

  On the other hand, when focusing on the second terminal electrode 5A, each of the resistance components of the second connection conductors 9A and 9B is one of the second internal electrodes 61 in the stacking direction with respect to the second internal electrode 61 as a boundary. It is divided into a resistance component of the second connection conductors 9A and 9B located on the side and a resistance component of the second connection conductors 9A and 9B located on the other side in the stacking direction from the second internal electrode 61. These resistance components are connected in parallel to the second terminal electrode 5A.

  Focusing on the second terminal electrode 5B, the resistance components of the second connection conductors 9A and 9B are respectively located on one side in the stacking direction from the second internal electrode 62 with the second internal electrode 62 as a boundary. It is divided into a resistance component of the second connection conductors 9A and 9B located and a resistance component of the second connection conductors 9A and 9B located on the other side in the stacking direction with respect to the second internal electrode 62. These resistance components are connected in parallel to the second terminal electrode 5B.

  Focusing on the second terminal electrode 5C, the resistance components of the second connection conductors 9A and 9B are respectively located on one side in the stacking direction with respect to the second internal electrode 71 with the second internal electrode 71 as a boundary. It is divided into a resistance component of the second connection conductors 9A and 9B located and a resistance component of the second connection conductors 9A and 9B located on the other side in the stacking direction with respect to the second internal electrode 71. These resistance components are connected in parallel to the second terminal electrode 5C.

  Focusing on the second terminal electrode 5D, the resistance components of the second connection conductors 9A and 9B are respectively connected in series to the second terminal electrode 5D.

  Due to the difference between the resistance components of the first and second connection conductors 7A, 7B, 9A, and 9B described above, the multilayer capacitor according to the third embodiment is compared with the multilayer capacitor C1 according to the first embodiment. The equivalent series resistance is increased.

  As described above, according to the present embodiment, the stacking direction of the first internal electrodes 41, 42, 51, 52 that are electrically connected to the first terminal electrodes 3A-3D via the lead conductors 53A-53D. And the positions in the stacking direction of the second inner electrodes 61, 62, 71, 72 electrically connected to the second terminal electrodes 5A-5D via the lead conductors 73A-73D, respectively. As a result, the equivalent series resistance of the multilayer capacitor is set to a desired value, so that the equivalent series resistance can be controlled easily and accurately.

  In addition, on the first to fourth side surfaces 1 a to 1 d of the multilayer body 1, the first outer conductor in the direction of wrapping around the side surface parallel to the stacking direction of the multilayer body 1 so as to intersect the stacking direction. Each conductor (first terminal electrodes 3A to 3D and first connecting conductors 7A and 7B) included in the group, and each conductor (second terminal electrodes 5A to 5D and second terminal conductors included in the second external conductor group) Connecting conductors 9A and 9B) are alternately arranged. Therefore, the polarity of the first outer conductor group (first terminal electrodes 3A to 3D and first connection conductors 7A and 7B) and the second outer conductor group (second terminal electrodes 5A to 5D and second connection). When the polarities of the conductors 9A and 9B) are reversed, the terminal electrodes or connecting conductors connected to the opposite polarity are alternately arranged so as to be adjacent to each other when viewed in the direction of circulation along the side surface of the multilayer body 1 Will be. As a result, currents in opposite directions flow in the lead conductors adjacent to each other in the direction of circulation along the side surface of the multilayer body 1. As a result, the magnetic fields generated due to these currents are canceled out, and the equivalent series inductance is reduced in the multilayer capacitor according to the third embodiment.

  In the multilayer capacitor according to the third embodiment, since the terminal electrodes 3A to 3D, 5A to 5D and the connection conductors 7A, 7B, 9A, and 9B are formed on different side surfaces, the first terminal electrodes 3A to 3A to Generation | occurrence | production of the short circuit between 3D and 2nd connection conductor 9A, 9B and the short circuit between 2nd terminal electrode 5A-5D and 1st connection conductor 7A, 7B is suppressed.

(Fourth embodiment)
With reference to FIGS. 5 and 6, the structure of the multilayer capacitor C2 in accordance with the fourth embodiment will be explained. The multilayer capacitor according to the fourth embodiment is different from the multilayer capacitor C1 according to the first embodiment in terms of the number of first and second terminal electrodes. FIG. 5 is a perspective view of the multilayer capacitor in accordance with the fourth embodiment. FIG. 6 is an exploded perspective view of the multilayer body included in the multilayer capacitor in accordance with the fourth embodiment.

  As shown in FIG. 5, the multilayer capacitor according to the fourth embodiment is similar to the multilayer capacitor C <b> 1 according to the first embodiment, and the first and second connection conductors formed in the multilayer body 1. 7A, 7B, 9A, 9B. However, the first connection conductor 7B and the second connection conductor 9B are arranged on the second side surface 1b from the fourth side surface 1d side to the third side surface 1c side. The two connecting conductors 9B are formed in this order.

  In addition, the multilayer capacitor in accordance with the fourth embodiment includes first terminal electrodes 3A to 3C and second terminal electrodes 5A to 5C formed on the multilayer body 1, as shown in FIG. The first terminal electrodes 3A and 3B and the second terminal electrode 5A are located on the third side surface 1c side of the multilayer body 1 and are first to the first side surface 1a side toward the second side surface 1b side. The terminal electrode 3A, the second terminal electrode 5A, and the first terminal electrode 3B are formed in this order.

  The first terminal electrode 3C and the second terminal electrodes 5B and 5C are located on the fourth side surface 1d side of the multilayer body 1, and are secondly moved from the second side surface 1b side to the first side surface 1a side. The terminal electrode 5B, the first terminal electrode 3C, and the second terminal electrode 5C are formed in this order.

  Therefore, on the first to fourth side surfaces 1a to 1d of the stacked body 1, the side surfaces of the stacked body 1 parallel to the stacking direction of the stacked body 1 (first, third, second and fourth side surfaces 1a 1c, 1b, and 1d), the conductors (first terminal electrodes 3A to 3C and first connection conductor 7A) included in the first outer conductor group with respect to the direction that circulates so as to intersect the stacking direction. 7B) and the respective conductors (second terminal electrodes 5A to 5C and second connection conductors 9A, 9B) included in the second outer conductor group are alternately arranged so as to be adjacent to each other.

  The first and second terminal electrodes 3 </ b> A to 3 </ b> C and 5 </ b> A to 5 </ b> C are formed with the first connection conductors 7 </ b> A and 7 </ b> B or the second connection conductors 9 </ b> A and 9 </ b> B among the side surfaces parallel to the stacking direction of the multilayer body 1. It is formed on third and fourth side surfaces 1c and 1d different from the first and second side surfaces 1a and 1b. The first terminal electrodes 3A to 3C and the second terminal electrodes 5A to 5C are electrically insulated from each other.

  Further, when focusing on only the first and second terminal electrodes 3A to 3C and 5A to 5C except for the first and second connection conductors 7A, 7B, 9A, and 9B, the first and second terminal electrodes 3A to 3C are used. 5A to 5C intersect the stacking direction along the side surfaces (first, third, second, and fourth side surfaces 1a, 1c, 1b, and 1d) of the stacked body 1 parallel to the stacking direction of the stacked body 1. Thus, the first terminal electrode and the second terminal electrode are arranged alternately with respect to the direction in which they circulate.

  In the multilayer capacitor in accordance with the fourth embodiment, as shown in FIG. 6, each lead conductor 53 </ b> A that extends so as to be drawn to the third side surface 1 c of the multilayer body 1 with respect to each first internal electrode 41, 42. , 53B are formed. The first inner electrode 43 is formed with a lead conductor 53C extending so as to be drawn to the fourth side surface 1d of the multilayer body 1.

  The lead conductor 53 </ b> A is formed integrally with the first internal electrode 41 and extends from the first internal electrode 41 so as to face the third side surface 1 c of the multilayer body 1. The lead conductor 53B is formed integrally with the first internal electrode 42 and extends from the first internal electrode 42 so as to face the third side surface 1c of the multilayer body 1. The lead conductor 53C is formed integrally with the first internal electrode 43, and extends from the first internal electrode 43 so as to face the fourth side surface 1d of the multilayer body 1.

  The first inner electrode 41 is electrically connected to the first terminal electrode 3A through the lead conductor 53A. The first internal electrode 42 is electrically connected to the first terminal electrode 3B through the lead conductor 53B. The first internal electrode 43 is electrically connected to the first terminal electrode 3C through the lead conductor 53C.

  Since the first inner electrodes 41 to 52 are electrically connected to each other via the first connection conductors 7A and 7B, the first inner electrodes 45 to 52 are also electrically connected to the first terminal electrodes 3A to 3C. Thus, the first internal electrodes 41 to 52 are connected in parallel.

  The second internal electrode 61 is formed with a lead conductor 73A extending so as to be drawn to the third side face 1c of the multilayer body 1. The second inner electrodes 62 and 63 are formed with respective lead conductors 73B and 73C extending so as to be drawn to the fourth side surface 1d of the multilayer body 1.

  The lead conductor 73 </ b> A is formed integrally with the second internal electrode 61 and extends from the first internal electrode 61 so as to face the third side surface 1 c of the multilayer body 1. The lead conductor 73 </ b> B is formed integrally with the second internal electrode 62 and extends from the second internal electrode 62 so as to face the fourth side surface 1 d of the multilayer body 1. The lead conductor 73 </ b> C is formed integrally with the second internal electrode 63 and extends from the second internal electrode 63 so as to face the fourth side surface 1 d of the multilayer body 1.

  The second internal electrode 61 is electrically connected to the second terminal electrode 5A through the lead conductor 73A. The second internal electrode 62 is electrically connected to the second terminal electrode 5B through the lead conductor 73B. The second internal electrode 63 is electrically connected to the second terminal electrode 5C through the lead conductor 73C.

  Since the second inner electrodes 61 to 72 are electrically connected to each other via the second connection conductors 9A and 9B, the second inner electrodes 65 to 72 are also electrically connected to the second terminal electrodes 5A to 5C. Therefore, the second internal electrodes 61 to 72 are connected in parallel.

  In the multilayer capacitor in accordance with the fourth embodiment, the number of first internal electrodes 41 to 43 directly connected to the first terminal electrodes 3A to 3C via the lead conductors 53A to 53C is three, and the first internal electrodes The total number of electrodes 41 to 52 is smaller. Further, the number of the second internal electrodes 61 to 63 that are directly connected to the second terminal electrodes 5A to 5C via the lead conductors 73A to 73C is three, which is larger than the total number of the second internal electrodes 61 to 72. It has been reduced. Therefore, the multilayer capacitor according to the fourth embodiment has an equivalent series resistance that is greater than that of a conventional multilayer capacitor in which all internal electrodes are connected to corresponding terminal electrodes via lead conductors.

  As described above, according to the present embodiment, the number of first inner electrodes 41 to 43 electrically connected to the first terminal electrodes 3A to 3C via the lead conductors 53A to 53C and the lead conductors 73A to 73A. By adjusting the number of second internal electrodes 61 to 63 electrically connected to the second terminal electrodes 5A to 5C via 73C, the equivalent series resistance of the multilayer capacitor according to the fourth embodiment can be reduced. Since it is set to a desired value, the equivalent series resistance can be controlled easily and accurately.

  In addition, on the first to fourth side surfaces 1 a to 1 d of the multilayer body 1, the first outer conductor in the direction of wrapping around the side surface parallel to the stacking direction of the multilayer body 1 so as to intersect the stacking direction. Each conductor (first terminal electrodes 3A to 3C and first connection conductors 7A and 7B) included in the group, and each conductor (second terminal electrodes 5A to 5C and second terminal conductors included in the second external conductor group) The connecting conductors 9A and 9B) are arranged adjacent to each other. Therefore, the polarity of the first outer conductor group (first terminal electrodes 3A to 3C and first connection conductors 7A and 7B) and the second outer conductor group (second terminal electrodes 5A to 5C and second connection). When the polarities of the conductors 9A and 9B) are reversed, the terminal electrodes or connecting conductors connected to the opposite polarity are alternately arranged so as to be adjacent to each other when viewed in the direction of circulation along the side surface of the multilayer body 1 Will be. As a result, currents in opposite directions flow in the lead conductors adjacent to each other in the direction of circulation along the side surface of the multilayer body 1. As a result, the magnetic fields generated due to these currents are canceled out, and the equivalent series inductance is reduced in the multilayer capacitor according to the fourth embodiment.

  Further, when focusing on only the first and second terminal electrodes 3A to 3C and 5A to 5C except for the first and second connection conductors 7A, 7B, 9A, and 9B, the first and second terminal electrodes 3A to 3A 3C, 5A to 5C are the stacking directions along the side surfaces (first, third, second, and fourth side surfaces 1a, 1c, 1b, and 1d) of the stacked body 1 parallel to the stacking direction of the stacked body 1. The first terminal electrodes and the second terminal electrodes are alternately arranged with respect to the direction of winding so as to intersect. Therefore, the first and second terminal electrodes 3A to 3C and 5A to 5C are arranged so that the magnetic field generated by the current flowing through the lead conductor connected to each terminal electrode is canceled and the equivalent series inductance is reduced. It has become. Since the first and second connection conductors 7A, 7B, 9A, and 9B are even numbers, the first and second terminal conductors 3A to 3C and 5A to 5C are arranged so that the equivalent series inductance is reduced. Even if a connection conductor is further added to the multilayer capacitor C2, the equivalent series inductance is still reduced.

  In the multilayer capacitor according to the fourth embodiment, since the terminal electrodes 3A to 3C, 5A to 5C and the connection conductors 7A, 7B, 9A, and 9B are formed on different side surfaces, the first terminal electrodes 3A to 3A to Generation | occurrence | production of the short circuit between 3C and 2nd connection conductor 9A, 9B and the short circuit between 2nd terminal electrode 5A-5C and 1st connection conductor 7A, 7B is suppressed.

  Note that the number of internal electrodes directly connected to the terminal electrodes 3A to 3C and 5A to 5C via the lead conductors 53A to 53C and 73A to 73C and the positions in the stacking direction are compared with the multilayer capacitor according to the fourth embodiment. By adjusting at least one of them, the equivalent series resistance of the multilayer capacitor can be set to a desired value.

  In the first to fourth embodiments, at least one of the number of internal electrodes directly connected to the terminal electrodes 3A to 3D and 5A to 5D via the lead conductors 53A to 53D and 73A to 73D and the position in the stacking direction. By adjusting one of them, the equivalent series resistance of each multilayer capacitor is set to a desired value. As a result, it is possible to easily and accurately control the equivalent series resistance of each multilayer capacitor.

  As described above, the number of first internal electrodes 41 to 52 directly connected to the first terminal electrodes 3 </ b> A to 3 </ b> D is one or more less than the total number of first internal electrodes 41 to 52. It can be performed within the following range. As described above, the adjustment of the number of second internal electrodes 61 to 72 directly connected to the second terminal electrodes 5A to 5D is one or more less than the total number of second internal electrodes 61 to 72. It can be performed within the following range. The number of first internal electrodes that are directly connected to the terminal electrodes 3A to 3D via the lead conductors 53A to 53D, and the second internal electrodes that are directly connected to the terminal electrodes 5A to 5D via the lead conductors 73A to 73D The number may be different.

  The preferred embodiment of the present invention has been described in detail above, but the present invention is not limited to the above embodiment. For example, the number of stacked dielectric layers 11 to 35 and the number of stacked first and second internal electrodes 41 to 52 and 61 to 72 are not limited to the numbers described in the above-described embodiments. Further, the number of terminal electrodes 3A to 3D and 5A to 5D is not limited to the number described in the above-described embodiment. Further, the number of connection conductors 7A, 7B, 9A, 9B is not limited to the number described in the above-described embodiment. Further, the number of internal electrodes directly connected to the terminal electrodes 3A to 3D and 5A to 5D via the lead conductors 53A to 53D and 73A to 73D and the positions in the stacking direction are the numbers described in the above-described embodiments and It is not limited to the position.

  In addition, the sum of the first connection conductor and the second connection conductor formed on the side surfaces 1a and 1b of the multilayer body 1 may not be an even number. Further, the terminal electrodes 3A to 3C, 5A to 5C and the connection conductors 7A, 7B, 9A, and 9B are not necessarily formed on different side surfaces.

  Further, a dielectric layer may be further laminated on the multilayer body of the multilayer capacitor according to the present invention, or dielectric layers and internal electrodes may be alternately laminated.

1 is a perspective view of a multilayer capacitor according to a first embodiment. FIG. 3 is an exploded perspective view of the multilayer body included in the multilayer capacitor in accordance with the first embodiment. It is a disassembled perspective view of the laminated body contained in the multilayer capacitor which concerns on 2nd Embodiment. It is a disassembled perspective view of the laminated body contained in the multilayer capacitor which concerns on 3rd Embodiment. It is a perspective view of the multilayer capacitor concerning a 4th embodiment. It is a disassembled perspective view of the laminated body contained in the multilayer capacitor which concerns on 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Laminated body, 1a-1d ... 1st-4th side surface, 3A-3D ... 1st terminal electrode, 5A-5D ... 2nd terminal electrode, 7A-7D ... 1st connection conductor, 9A-9D ... 2nd connection conductor, 11-35 ... Dielectric layer, 41-52 ... 1st internal electrode, 81A-92A, 81B-92B ... Lead-out conductor, 61-72 ... 2nd internal electrode, 101A-112A, 101B to 112B... Lead conductor, 53A to 53D, 73A to 73D... Lead conductor, C1, C2.

Claims (6)

A multilayer capacitor comprising a multilayer body in which a plurality of dielectric layers and a plurality of internal electrodes are alternately stacked, and a plurality of external conductors formed on the side surface of the multilayer body,
The plurality of internal electrodes include a plurality of first internal electrodes and a plurality of second internal electrodes arranged alternately,
The plurality of outer conductors include a first outer conductor group including a plurality of first terminal conductors and even numbered first connecting conductors, a plurality of second terminal conductors and even numbered second connecting conductors. A second outer conductor group including
The plurality of first and second terminal conductors are electrically insulated from each other; the even number of first and second connection conductors are electrically insulated from each other;
Each of the plurality of first internal electrodes is electrically connected to each other via the even number of first connection conductors formed on a side surface of the multilayer body,
Each of the plurality of second internal electrodes is electrically connected to each other via the even number of second connection conductors formed on the side surface of the multilayer body,
Among the plurality of first internal electrodes, each of the first internal electrodes that is equal to or greater than the total number of the plurality of first terminal conductors and less than the total number of the first internal electrodes is provided via a lead conductor. The first terminal conductors are electrically connected to the first terminal conductors, and the first terminal conductors are electrically connected to the first terminal conductors via the lead conductors, respectively. Electrically connected to at least one of the internal electrodes of
Among the plurality of second internal electrodes, the second internal electrodes having a total number greater than or equal to the total number of the plurality of second terminal conductors and one less than the total number of the second internal electrodes are respectively connected via the lead conductors. The second terminal conductors are electrically connected to the plurality of second terminal conductors, and each of the plurality of second terminal conductors is electrically connected to the second terminal conductor via the lead conductor. Electrically connected to at least one of the internal electrodes of
The respective conductors included in the first outer conductor group and the respective conductors included in the second outer conductor group are arranged so as to be adjacent to each other in the direction of circulation along the side surface of the multilayer body. With
The number of the first internal electrodes electrically connected to the first terminal conductor via the lead conductor and the second electrically connected to the second terminal conductor via the lead conductor. A multilayer capacitor, wherein an equivalent series resistance is set to a desired value by adjusting at least one of the number of internal electrodes. A multilayer capacitor comprising a multilayer body in which a plurality of dielectric layers and a plurality of internal electrodes are alternately stacked, and a plurality of external conductors formed on the side surface of the multilayer body,
The plurality of internal electrodes include a plurality of first internal electrodes and a plurality of second internal electrodes arranged alternately,
The plurality of outer conductors include a first outer conductor group including a plurality of first terminal conductors and even numbered first connecting conductors, a plurality of second terminal conductors and even numbered second connecting conductors. A second outer conductor group including
The plurality of first and second terminal conductors are electrically insulated from each other; the even number of first and second connection conductors are electrically insulated from each other;
Each of the plurality of first internal electrodes is electrically connected to each other via the even number of first connection conductors formed on a side surface of the multilayer body,
Each of the plurality of second internal electrodes is electrically connected to each other via the even number of second connection conductors formed on the side surface of the multilayer body,
Among the plurality of first internal electrodes, each of the first internal electrodes that is equal to or greater than the total number of the plurality of first terminal conductors and less than the total number of the first internal electrodes is provided via a lead conductor. The first terminal conductors are electrically connected to the first terminal conductors, and the first terminal conductors are electrically connected to the first terminal conductors via the lead conductors, respectively. Electrically connected to at least one of the internal electrodes of
Among the plurality of second internal electrodes, the second internal electrodes having a total number greater than or equal to the total number of the plurality of second terminal conductors and one less than the total number of the second internal electrodes are respectively connected via the lead conductors. The second terminal conductors are electrically connected to the plurality of second terminal conductors, and each of the plurality of second terminal conductors is electrically connected to the second terminal conductor via the lead conductor. Electrically connected to at least one of the internal electrodes of
The respective conductors included in the first outer conductor group and the respective conductors included in the second outer conductor group are arranged so as to be adjacent to each other in the direction of circulation along the side surface of the multilayer body. With
The position of the first internal electrode electrically connected to the first terminal conductor via the lead conductor in the stacking direction of the laminate and the second terminal conductor via the lead conductor The equivalent series resistance is set to a desired value by adjusting at least one of the positions of the second internal electrodes connected to each other in the stacking direction of the stack. Capacitor. A part of the even number of first connection conductors and a part of the even number of second connection conductors are formed on a first side surface of the side surfaces parallel to the stacking direction of the multilayer body,
Remaining first connection conductors other than the first connection conductor formed on the first side surface on a second side surface parallel to the stacking direction of the multilayer body and facing the first side surface And the remaining second connection conductor other than the second connection conductor formed on the first side surface,
The sum of the first connection conductor and the second connection conductor formed on the first side surface, and the first connection conductor and the second connection conductor formed on the second side surface. 3. The multilayer capacitor according to claim 1, wherein all of the sums are even numbers. The even number of first connection conductors is two, one of which is formed on the first side surface and the other one is formed on the second side surface, and the two first connection conductors are While being formed at a position that is line symmetric with respect to the central axis in the stacking direction of the stack,
The even-numbered second connection conductors are two, one of which is formed on the first side surface and the other one is formed on the second side surface, and the two second connection conductors are 4. The multilayer capacitor according to claim 3, wherein the multilayer capacitor is formed at a position that is line-symmetric with respect to a central axis in a stacking direction of the multilayer body.   The plurality of first and second terminal conductors are on side surfaces different from the side surface on which the first connection conductor or the second connection conductor is formed, of the side surfaces parallel to the stacking direction of the multilayer body. The multilayer capacitor according to any one of claims 1 to 4, wherein the multilayer capacitor is formed. The plurality of first and second portions formed on the side surface different from the side surface on which the first connection conductor or the second connection conductor is formed among the side surfaces parallel to the stacking direction of the multilayer body. 6. The multilayer capacitor according to claim 5, wherein the sum of the terminal conductors is an even number.

Images