JP2008066594A - Multi-layer trap component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-layer trap component which can easily adjust a trap frequency. <P>SOLUTION: The multi-layer trap component 1 includes a multi-layer 10 on which non-magnetic layers A1-A12 are laminated, a coil L1 which is located inside the multi-layer 10, and external electrodes 12, 14 which are formed on both side of a longitudinal direction of the multi-layer 10 respectively. The multi-layer 10 has a first multi-layer portion 10a composed of a non-magnetic layer A1 and a second multi-layer portion 10b composed of non-magnetic layers A2-A12. The whole coil L1 is positioned in the second multi-layer portion 10b. The dielectric constant of the first multi-layer portion 10a is higher than the dielectric constant of the dielectric constant of the second multi-layer portion 10b. Thereby, the first multi-layer portion 10a having a higher dielectric constant is positioned between the coil L1 and the external electrodes 12, 14, then, the floating capacitance produced between the coil L1 and the external electrodes 12, 14 becomes larger. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a multilayer trap component.

Conventionally, a multi-layered structure in which a plurality of nonmagnetic layers formed using only a material having a relatively high dielectric constant is stacked, and a conductive pattern that wraps around in the stacking direction of the stacked body is formed inside the stacked body. Arranged multilayer trap parts are known (see, for example, Patent Document 1).
JP-A-6-283336

  However, in the conventional multilayer trap component, when a specific frequency (trap frequency) for attenuating the signal is adjusted to a desired value, the material constituting the nonmagnetic layer is changed or the conductor pattern is configured. It was necessary to make a change and design one laminated trap part for each desired trap frequency. Therefore, the conventional multilayer trap component has a problem that it takes much time to adjust the trap frequency.

  An object of the present invention is to provide a multilayer trap component that can easily adjust the trap frequency.

  The laminated trap component according to the present invention includes a laminated body in which a plurality of nonmagnetic layers are laminated, a coil provided in the laminated body, an outer surface of the laminated body, and one end of the coil electrically And a second external electrode disposed on the outer surface of the multilayer body and electrically connected to the other end of the coil, and the multilayer body includes a plurality of nonmagnetic layers. A first laminated portion composed of at least one first nonmagnetic layer, and a second laminated portion composed of at least one second nonmagnetic layer among the plurality of nonmagnetic layers. At least a part of the coil is located inside the second stacked unit, and the dielectric constant of the first stacked unit is higher than the dielectric constant of the second stacked unit.

  In the multilayer trap component according to the present invention, the multilayer body includes the first multilayer portion and the second multilayer portion, and the dielectric constant of the first multilayer portion is higher than the dielectric constant of the second multilayer portion. It is expensive. In addition, at least a part of the coil is located inside the second laminated portion. Therefore, the first laminated portion having a high dielectric constant is wound on the coil while retaining the characteristics as an inductor by having at least a part of the coil inside the second laminated portion having a low dielectric constant. The stray capacitance generated between the windings of the coil or between the coil and the external electrode can be increased by being positioned between the coil and the external electrode, and the laminate is only the second non-magnetic layer. Compared with the case where it comprises, trap frequency becomes small. As a result, the trap frequency can be easily adjusted without having to re-examine the design of the stacked trap part from the beginning by simply changing the position of the first stacked portion and the size of the first stacked portion in the stacked body. Is possible.

  The stacked body has a pair of outer surfaces intersecting the stacking direction of the plurality of nonmagnetic layers and has only one first stacked portion, and the first stacked portion includes the plurality of nonmagnetic layers. A pair of side surfaces intersecting with each other in the stacking direction, and one side surface of the pair of side surfaces of the first stacked portion constitutes one outer surface of the pair of outer surfaces of the stacked body. Is preferred. In this case, when the multilayer trap component is mounted on the external substrate so that the other external surface of the pair of external surfaces of the multilayer body is opposed to the external substrate, the first multilayer portion is the multilayer body. Since the distance between the first laminated portion and the external substrate can be increased as compared with the multilayer trap component located inside the semiconductor device, the stray capacitance generated between the external electrode and the external substrate is reduced. It becomes possible.

  Moreover, it is preferable that the whole coil is located inside the second laminated portion. This makes it possible to increase the stray capacitance generated between the coil and the external electrode.

  Moreover, it is preferable that the laminated body has only one 1st laminated part, and the 1st laminated part is located between the coil | windings of a coil. In this way, it is possible to increase the stray capacitance generated between the windings of the coil.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the laminated | stacked trap component which can adjust a trap frequency easily.

  Preferred embodiments of the present invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and a duplicate description is omitted.

(First embodiment)
With reference to FIGS. 1-3, the structure of the multilayer trap component 1 which concerns on 1st Embodiment is demonstrated. FIG. 1 is a perspective view showing a multilayer trap component according to the first to fifth embodiments. FIG. 2 is a longitudinal sectional view showing the multilayer trap component according to the first embodiment. FIG. 3 is an exploded perspective view for explaining the configuration of the multilayer body included in the multilayer trap component according to the first embodiment.

  As shown in FIG. 1, the laminated trap component 1 includes a substantially rectangular parallelepiped laminated body 10, a pair of external electrodes 12 and 14 formed on both side surfaces of the laminated body 10 in the longitudinal direction, and the laminated body 10. Are provided with a coil L1 in which the conductor patterns B1 to B6 are electrically connected to each other.

  As shown in FIGS. 2 and 3, the laminated body 10 is configured by laminating nonmagnetic layers A1 to A12, and includes a first laminated portion 10a including the nonmagnetic layer A1 and a nonmagnetic layer A2. And a second laminated portion 10b made of A12. The first stacked unit 10 a (nonmagnetic layer A <b> 1) has a pair of side surfaces S <b> 1 and S <b> 2 that intersect the stacking direction of the stacked body 10. The side surface S1 of the first stacked unit 10a constitutes the outer surface S3 of the pair of outer surfaces S3 and S4 that intersect the stacking direction of the stacked body 10 in the first embodiment. The side surface S2 of the first stacked unit 10a faces the second stacked unit 10b. In the second stacked portion 10b (nonmagnetic layers A2 to A12), the entire coil L1 is located inside (see FIG. 2).

  The nonmagnetic layers A1 to A12 constituting the first stacked portion 10a and the second stacked portion 10b function as an insulator having electrical insulation. In the actual multilayer trap component 1, the non-magnetic layers A1 to A12 are integrated so that the boundaries between them cannot be visually recognized.

As a material constituting the nonmagnetic layer A1, a BaO—SrO—TiO ₂ —Nd ₂ O ₃ -based material can be used. The dielectric constant of the nonmagnetic layer A1 is about 25, for example. As a material for forming the nonmagnetic layer _A2～A12, it can be used Al ₂ O ₃ -SiO ₂ -SrO-based material. The dielectric constant of the nonmagnetic layers A2 to A12 is, for example, about 7 to 8. That is, the dielectric constant of the first stacked unit 10a (nonmagnetic layer A1) is higher than the dielectric constant of the second stacked unit 10b (nonmagnetic layers A2 to A12).

  A substantially C-shaped conductor pattern B1 corresponding to approximately 3/4 turn of the coil L1 is formed on the surface of the nonmagnetic layer A4. A lead-out portion B1a is integrally formed at one end of the conductor pattern B1. The lead-out part B1a of the conductor pattern B1 is drawn out to the edge of the nonmagnetic layer A4, and its end is exposed at the end face of the nonmagnetic layer A4. For this reason, one end of the coil L1 is electrically connected to the external electrode 12 via the lead-out part B1a. The other end of the conductor pattern B1 is electrically connected to a through-hole electrode C1 formed through the nonmagnetic layer A4 in the thickness direction. For this reason, the conductor pattern B1 is electrically connected to one end of the corresponding conductor pattern B2 through the through-hole electrode C1 in a stacked state.

  On the surface of the non-magnetic layer A5, a substantially L-shaped conductor pattern B2 corresponding to approximately 1/2 turn of the coil L1 is formed. One end of the conductor pattern B2 includes a region electrically connected to the through-hole electrode C1 in a stacked state. The other end of the conductor pattern B2 is electrically connected to a through-hole electrode C2 formed through the nonmagnetic layer A5 in the thickness direction. For this reason, the conductor pattern B2 is electrically connected to one end of the corresponding conductor pattern B3 through the through-hole electrode C2 in a stacked state.

  On the surface of the nonmagnetic material layer A6, a substantially L-shaped conductor pattern B3 corresponding to approximately 1/2 turn of the coil L1 is formed. One end of the conductor pattern B3 includes a region electrically connected to the through-hole electrode C2 in a stacked state. The other end of the conductor pattern B3 is electrically connected to a through-hole electrode C3 formed through the nonmagnetic layer A6 in the thickness direction. For this reason, the conductor pattern B3 is electrically connected to one end of the corresponding conductor pattern B4 through the through-hole electrode C3 in a stacked state.

  On the surface of the nonmagnetic material layer A7, a substantially L-shaped conductor pattern B4 corresponding to approximately 1/2 turn of the coil L1 is formed. One end of the conductor pattern B4 includes a region electrically connected to the through-hole electrode C3 in a stacked state. The other end of the conductor pattern B4 is electrically connected to a through-hole electrode C4 formed through the nonmagnetic layer A7 in the thickness direction. For this reason, the conductor pattern B4 is electrically connected to one end of the corresponding conductor pattern B5 through the through-hole electrode C4 in a stacked state.

  On the surface of the non-magnetic layer A8, a substantially L-shaped conductor pattern B5 corresponding to approximately 1/2 turn of the coil L1 is formed. One end of the conductor pattern B5 includes a region electrically connected to the through-hole electrode C4 in a stacked state. The other end of the conductor pattern B5 is electrically connected to a through-hole electrode C5 formed through the nonmagnetic layer A8 in the thickness direction. For this reason, the conductor pattern B5 is electrically connected to one end of the corresponding conductor pattern B6 through the through-hole electrode C5 in a stacked state.

  A substantially C-shaped conductor pattern B2 corresponding to approximately 3/4 turns of the coil L1 is formed on the surface of the nonmagnetic layer A9. One end of the conductor pattern B6 includes a region electrically connected to the through-hole electrode C4 in a stacked state. A lead-out portion B6a is integrally formed at the other end of the conductor pattern B6. The lead-out part B6a of the conductor pattern B6 is drawn out to the edge of the nonmagnetic layer A9, and its end is exposed at the end face of the nonmagnetic layer A9. For this reason, the other end of the coil L1 is electrically connected to the external electrode 14 via the lead-out part B6a.

  As shown in FIGS. 1 and 2, the external electrodes 12 and 14 are formed so as to wrap around the outer surface intersecting both side surfaces in the longitudinal direction of the multilayer body 10. The portion of the external electrode 12 that wraps around the outer surface S3 has a region facing the lead-out portion B1a, as shown in FIG. A portion of the external electrode 14 that wraps around the outer surface S3 has a region facing the conductor pattern B1, as shown in FIG. In the first embodiment, between the portion of the external electrode 12 that wraps around the outer surface S3 and the lead-out portion B1a, and the portion of the external electrode 14 that wraps around the outer surface S3 and the conductor pattern B1 The first laminated portion 10a (nonmagnetic layer A1) having a high dielectric constant is located between the two.

  As described above, in the first embodiment, the stacked body 10 is configured by the first stacked portion 10a and the second stacked portion 10b, and the dielectric constant of the first stacked portion 10a is the second stacked layer. The dielectric constant of the portion 10b is higher. In the first embodiment, the entire coil L1 is positioned inside the second stacked unit 10b, and the side surface S1 of the first stacked unit 10a forms the outer surface S3 of the stacked body 10. . Therefore, the first laminated portion 10a having a high dielectric constant is connected to the coil L1 while maintaining the characteristics as an inductor to some extent because the entire coil L1 exists inside the second laminated portion 10b having a low dielectric constant. By being positioned between the external electrodes 12 and 14, between the coil L1 and the external electrodes 12 and 14 (between the portion of the external electrode 12 that wraps around the outer surface S3 and the lead-out portion B1a, and external The stray capacitance generated between the portion of the electrode 14 that wraps around the outer surface S3 and the conductor pattern B1) can be increased, so that the multilayer body 10 has the second multilayer portion 10b (nonmagnetic layers A2 to A12). ), The trap frequency is smaller than that of the case of only being configured. As a result, the trap frequency can be easily adjusted without having to re-examine the design of the multilayer trap component from the beginning by further laminating the nonmagnetic layer A1 constituting the first laminated portion 10a to form the laminated body 10. It becomes possible.

  In the first embodiment, the side surface S1 of the first stacked unit 10a having a high dielectric constant forms the outer surface S3 of the stacked body 10. Therefore, when the multilayer trap component 1 is mounted on the external substrate so that the outer surface S4 of the multilayer body 10 faces the external substrate (not shown), the first multilayer portion 10a is positioned inside the multilayer body 10. The distance between the first stacked portion 10a and the external substrate can be increased as compared with the stacked trap component. As a result, stray capacitance generated between the external electrodes 12 and 14 and the external substrate can be reduced.

  In the first embodiment, the side surface S1 of the first stacked portion 10a constitutes the outer surface S3 of the stacked body 10, and the side surface S2 of the first stacked portion 10a is the second stacked portion 10b (nonmagnetic material). Opposite layer A2). For this reason, the non-magnetic material layer A1 and the non-magnetic material layers A2 to A12 are made of different materials, so that the shrinkage rate when the precursor of the nonmagnetic material layer A1 is fired and the nonmagnetic material layers A2 to A12 are reduced. Although there is a difference in shrinkage rate when the precursor is fired, it is due to the difference in shrinkage rate compared to the case where the first laminated portion 10a is located between the second laminated portions 10b. Impact is less likely to occur.

(Second Embodiment)
Next, the configuration of the multilayer trap component 2 according to the second embodiment will be described with reference to FIGS. 1, 4, and 5. FIG. 4 is a longitudinal sectional view showing the multilayer trap component according to the second embodiment. FIG. 5 is an exploded perspective view for explaining the configuration of the multilayer body included in the multilayer trap component according to the second embodiment. Below, it demonstrates centering around difference with the multilayer trap component 1 which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 1, the stacked trap component 2 includes a stacked body 20 having a substantially rectangular parallelepiped shape. As shown in FIGS. 4 and 5, the stacked body 20 is configured by stacking nonmagnetic layers A21, A22, A3 to A12, and includes a first stacked portion 20a including the nonmagnetic layer A22, And a second laminated portion 20b made of magnetic layers A21 and A3 to A12. In the second embodiment, the first stacked portion 20a (nonmagnetic layer A22) is located between the nonmagnetic layer A21 and the nonmagnetic layer A3. In the second laminated portion 20b, the entire coil L1 is located inside (see FIG. 4).

  The nonmagnetic layers A21, A22, A3 to A12 constituting the first stacked unit 20a and the second stacked unit 20b function as an insulator having electrical insulation. In the actual laminated trap component 2, the nonmagnetic material layers A21, A22, and A3 to A12 are integrated so that the boundaries are not visible.

  The nonmagnetic layer A21 is made of the same material as the nonmagnetic layers A3 to A12. The nonmagnetic layer A22 is made of the same material as the nonmagnetic layer A1 in the first embodiment. That is, the dielectric constant of the first stacked unit 20a (nonmagnetic layer A22) is higher than the dielectric constant of the second stacked unit 20b (nonmagnetic layers A21, A3 to A12).

  As described above, in the second embodiment, the stacked body 20 includes the first stacked unit 20a and the second stacked unit 20b, and the dielectric constant of the first stacked unit 20a is the second stacked unit. The dielectric constant of the portion 20b is higher. In the second embodiment, the entire coil L1 is located inside the second stacked portion 20b, and the first stacked portion 20a is between the nonmagnetic layer A21 and the nonmagnetic layer A3. Intervene. For this reason, since the entire coil L1 is present inside the second portion 20b having a low dielectric constant, the first laminated portion 20a having a high dielectric constant is connected to the coil L1 and the outside while maintaining some characteristics as an inductor. Between the electrodes 12 and 14, between the coil L1 and the external electrodes 12 and 14 (between the part of the external electrode 12 that wraps around the outer surface S3 and the lead-out part B1a, and the external electrode 14, the stray capacitance generated between the portion surrounding the outer surface S <b> 3 and the conductor pattern B <b> 1) can be increased. The trap frequency is smaller than in the case where only A12) is configured. Specifically, in the second embodiment, the nonmagnetic material layer A22 having a high dielectric constant is located inside the multilayer body 20 relative to the nonmagnetic material layer A1 in the multilayer trap component 1 according to the first embodiment. Therefore, the trap frequency of the multilayer trap component 2 is smaller than the trap frequency of the multilayer trap component 1 according to the first embodiment. As a result, it is possible to easily adjust the trap frequency without re-examining the design of the multilayer trap component from the beginning by simply laminating the non-magnetic layer A22 constituting the first multilayer portion 20a to form the multilayer body 20. Is possible.

(Third embodiment)
Next, the configuration of the multilayer trap component 3 according to the third embodiment will be described with reference to FIGS. 1, 6, and 7. FIG. 6 is a longitudinal sectional view showing the multilayer trap component according to the third embodiment. FIG. 7 is an exploded perspective view for explaining the configuration of the multilayer body included in the multilayer trap component according to the third embodiment. Below, it demonstrates centering around difference with the multilayer trap component 1 which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 1, the stacked trap component 3 includes a stacked body 30 having a substantially rectangular parallelepiped shape. As shown in FIGS. 6 and 7, the multilayer body 30 is configured by laminating nonmagnetic layers A31 to A33 and A4 to A12, and includes a first multilayer portion 30a including the nonmagnetic layer A33, And a second laminated portion 30b made of magnetic layers A31, A32, A4 to A12. In the third embodiment, the first stacked unit 30a (nonmagnetic layer A33) is located between the nonmagnetic layer A32 and the nonmagnetic layer A4. In the second stacked portion 30b, a part of the coil L1 is located inside (see FIG. 6).

  The nonmagnetic layers A31 to A33 and A4 to A12 constituting the first stacked unit 30a and the second stacked unit 30b function as an insulator having electrical insulation. In the actual laminated trap component 3, the nonmagnetic material layers A31 to A33 and A4 to A12 are integrated so that the boundaries cannot be visually recognized.

  The nonmagnetic layers A31 and A32 are made of the same material as the nonmagnetic layers A4 to A12. The nonmagnetic layer A33 is made of the same material as the nonmagnetic layer A1 in the first embodiment. That is, the dielectric constant of the first stacked unit 30a (nonmagnetic layer A33) is higher than the dielectric constant of the second stacked unit 30b (nonmagnetic layers A31, A32, A4 to A12).

  As described above, in the third embodiment, the stacked body 30 is configured by the first stacked portion 30a and the second stacked portion 30b, and the dielectric constant of the first stacked portion 30a is the second stacked layer. The dielectric constant of the portion 30b is higher. In the third embodiment, a part of the coil L1 is located inside the second stacked portion 30b, and the first stacked portion 30a is between the nonmagnetic layer A32 and the nonmagnetic layer A4. Is intervening. For this reason, since the entire coil L1 exists inside the second portion 30b having a low dielectric constant, the first laminated portion 30a having a high dielectric constant is connected to the coil L1 and the outside while maintaining the characteristics as an inductor to some extent. Between the electrodes 12 and 14, between the coil L1 and the external electrodes 12 and 14 (between the part of the external electrode 12 that wraps around the outer surface S3 and the lead-out part B1a, and the external electrode 14, the stray capacitance generated between the portion that wraps around the outer surface S3 and the conductor pattern B1) can be increased, so that the multilayer body 30 has the second multilayer portion 30b (nonmagnetic layers A31, A32, The trap frequency is smaller than the case where only A4 to A12) are configured. Specifically, in the third embodiment, the nonmagnetic material layer A33 having a high dielectric constant is the nonmagnetic material layer A1 in the multilayer trap component 1 according to the first embodiment and the multilayer trap component 2 according to the second embodiment. The trap frequency of the multilayer trap component 3 is the trap frequency of the multilayer trap component 1 according to the first embodiment and the trap frequency of the multilayer trap component 1 according to the second embodiment. The value is smaller than the trap frequency of the multilayer trap component 2. As a result, it is possible to easily adjust the trap frequency without re-examining the design of the stacked trap component from the beginning by simply stacking the nonmagnetic material layer A33 constituting the first stacked portion 30a into the stacked body 30. Is possible.

(Fourth embodiment)
Next, the configuration of the multilayer trap component 4 according to the fourth embodiment will be described with reference to FIGS. 1, 8, and 9. FIG. 8 is a longitudinal sectional view showing a multilayer trap component according to the fourth embodiment. FIG. 9 is an exploded perspective view for explaining the configuration of the multilayer body included in the multilayer trap component according to the fourth embodiment. Below, it demonstrates centering around difference with the multilayer trap component 1 which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 1, the stacked trap component 4 includes a stacked body 40 having a substantially rectangular parallelepiped shape. As shown in FIGS. 8 and 9, the stacked body 40 is configured by stacking nonmagnetic layers A41 to A48, A9 to A12, and includes a first stacked portion 40a composed of the nonmagnetic layers A48, And a second laminated portion 40b made of magnetic layers A41 to A47 and A9 to A12. In the fourth embodiment, the first stacked portion 40a (nonmagnetic layer A48) is located between the nonmagnetic layer A47 and the nonmagnetic layer A9. In the second stacked portion 40b, a part of the coil L1 is located inside (see FIG. 8).

  The nonmagnetic layers A41 to A48 and A9 to A12 constituting the first stacked portion 40a and the second stacked portion 40b function as an insulator having electrical insulation. In the actual laminated trap component 4, the nonmagnetic material layers A41 to A48 and A9 to A12 are integrated so that the boundaries are not visible.

  The nonmagnetic layers A41 to A47 are made of the same material as the nonmagnetic layers A9 to A12. The nonmagnetic layer A48 is made of the same material as the nonmagnetic layer A1 in the first embodiment. That is, the dielectric constant of the first stacked portion 40a (nonmagnetic layer A48) is higher than the dielectric constant of the second stacked portion 40b (nonmagnetic layers A41 to A47, A9 to A12).

  On the surface of the nonmagnetic material layer A44, a substantially C-shaped conductor pattern B1 corresponding to approximately 3/4 turn of the coil L1 is formed. The lead-out part B1a of the conductor pattern B1 is drawn out to the edge of the nonmagnetic layer A44, and its end is exposed at the end face of the nonmagnetic layer A44. The other end of the conductor pattern B1 is electrically connected to a through-hole electrode C1 formed through the nonmagnetic material layer A44 in the thickness direction.

  On the surface of the non-magnetic layer A45, a substantially L-shaped conductor pattern B2 corresponding to approximately 1/2 turn of the coil L1 is formed. The other end of the conductor pattern B2 is electrically connected to a through-hole electrode C2 formed through the nonmagnetic layer A45 in the thickness direction.

  On the surface of the nonmagnetic material layer A46, a substantially L-shaped conductor pattern B3 corresponding to approximately 1/2 turn of the coil L1 is formed. The other end of the conductor pattern B3 is electrically connected to a through-hole electrode C3 formed through the nonmagnetic layer A46 in the thickness direction.

  On the surface of the nonmagnetic material layer A47, a substantially L-shaped conductor pattern B4 corresponding to approximately 1/2 turn of the coil L1 is formed. The other end of the conductor pattern B4 is electrically connected to a through-hole electrode C4 formed through the nonmagnetic layer A47 in the thickness direction.

  On the surface of the nonmagnetic material layer A48, a substantially L-shaped conductor pattern B5 corresponding to approximately 1/2 turn of the coil L1 is formed. The other end of the conductor pattern B5 is electrically connected to a through-hole electrode C5 formed through the nonmagnetic layer A48 in the thickness direction.

  As described above, in the fourth embodiment, the stacked body 40 is configured by the first stacked portion 40a and the second stacked portion 40b, and the dielectric constant of the first stacked portion 40a is the second stacked layer. The dielectric constant of the portion 40b is higher. In the fourth embodiment, a part of the coil L1 is located inside the second laminated portion 40b, and the first laminated portion 40a is interposed between the conductor pattern B5 and the conductor pattern B6. Yes. For this reason, the presence of a part of the coil L1 inside the second portion 40b having a low dielectric constant allows the first laminated portion 40a having a high dielectric constant to be included in the coil L1 while maintaining some characteristics as an inductor. The stray capacitance generated between the conductor patterns B4 and B5, the conductor pattern B6, and the lead-out portion B6a can be increased by being positioned between the windings, and the laminate 40 becomes the second laminate portion 40b (nonmagnetic layer). Compared with the case where only A41 to A47 and A9 to A12) are used, the trap frequency is reduced. As a result, it is possible to easily adjust the trap frequency without re-examining the design of the multilayer trap component from the beginning by further laminating the nonmagnetic material layer A48 constituting the first laminated portion 40a to form the laminated body 40. It becomes possible.

(Fifth embodiment)
Next, the configuration of the multilayer trap component 5 according to the fifth embodiment will be described with reference to FIGS. 1, 10, and 11. FIG. 10 is a longitudinal sectional view showing a multilayer trap component according to the fifth embodiment. FIG. 11 is an exploded perspective view for explaining the configuration of the multilayer body included in the multilayer trap component according to the fifth embodiment. Below, it demonstrates centering around difference with the multilayer trap component 1 which concerns on 1st Embodiment, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 1, the multilayer trap component 5 includes a substantially rectangular parallelepiped laminated body 50 and a coil L2 in which conductor patterns B1 to B12 and B51 are electrically connected to each other inside the laminated body 50. I have. As shown in FIGS. 10 and 11, the stacked body 50 is configured by stacking nonmagnetic layers A51 to A58, A9 to A12, and includes a first stacked portion 50a including the nonmagnetic layer A58, And a second laminated portion 50b made of magnetic layers A51 to A57 and A9 to A12. The first stacked unit 50a (nonmagnetic layer A58) is located between the nonmagnetic layer A57 and the nonmagnetic layer A9 in the fifth embodiment. In the second stacked portion 50b, a part of the coil L2 is located inside (see FIG. 10).

  The nonmagnetic layers A51 to A58 and A9 to A12 constituting the first stacked portion 50a and the second stacked portion 50b function as an insulator having electrical insulation. In the actual multilayer trap part 5, the nonmagnetic material layers A51 to A58 and A9 to A12 are integrated so that the boundaries cannot be visually recognized.

  The nonmagnetic layers A51 to A57 are made of the same material as the nonmagnetic layers A9 to A12. The nonmagnetic layer A58 is made of the same material as the nonmagnetic layer A1 in the first embodiment. That is, the dielectric constant of the first stacked unit 50a (nonmagnetic layer A58) is higher than the dielectric constant of the second stacked unit 40b (nonmagnetic layers A51 to A57, A9 to A12).

  A substantially C-shaped conductor pattern B1 corresponding to approximately 3/4 turn of the coil L2 is formed on the surface of the nonmagnetic layer A53. The lead-out part B1a of the conductor pattern B1 is drawn out to the edge of the nonmagnetic layer A53, and its end is exposed on the end surface of the nonmagnetic layer A53. The other end of the conductor pattern B1 is electrically connected to a through-hole electrode C1 formed through the nonmagnetic layer A53 in the thickness direction.

  On the surface of the nonmagnetic material layer A54, a substantially L-shaped conductor pattern B2 corresponding to approximately 1/2 turn of the coil L2 is formed. The other end of the conductor pattern B2 is electrically connected to a through-hole electrode C2 formed through the nonmagnetic material layer A54 in the thickness direction.

  On the surface of the nonmagnetic material layer A55, a substantially L-shaped conductor pattern B3 corresponding to approximately 1/2 turn of the coil L2 is formed. The other end of the conductor pattern B3 is electrically connected to a through-hole electrode C3 formed through the nonmagnetic layer A55 in the thickness direction.

  On the surface of the nonmagnetic material layer A56, a substantially L-shaped conductor pattern B4 corresponding to approximately 1/2 turn of the coil L2 is formed. The other end of the conductor pattern B4 is electrically connected to a through-hole electrode C4 formed through the nonmagnetic layer A56 in the thickness direction.

  On the surface of the non-magnetic layer A57, a substantially L-shaped conductor pattern B5 corresponding to approximately 1/2 turn of the coil L2 is formed. The other end of the conductor pattern B5 is electrically connected to a through-hole electrode C5 formed through the nonmagnetic layer A57 in the thickness direction.

  An island-shaped conductor pattern B51 is formed on the surface of the nonmagnetic layer A58. The conductor pattern B51 includes a region electrically connected to the through-hole electrode C5 in a stacked state. The center of the conductor pattern B51 is electrically connected to a through-hole electrode C51 formed through the nonmagnetic layer A58 in the thickness direction. For this reason, the conductor pattern B58 is electrically connected to one end of the corresponding conductor pattern B6 via the through-hole electrode C51 in a stacked state.

  As described above, in the fifth embodiment, the stacked body 50 is configured by the first stacked unit 50a and the second stacked unit 50b, and the dielectric constant of the first stacked unit 50a is the second stacked unit. The dielectric constant of the portion 50b is higher. In the fifth embodiment, a part of the coil L2 is located inside the second laminated portion 50b, and the first laminated portion 50a is located between the conductor patterns B5 and B51 and the conductor pattern B6. is doing. For this reason, the presence of a part of the coil L2 in the second portion 50b having a low dielectric constant allows the first laminated portion 50a having a high dielectric constant to be included in the coil L2 while maintaining some characteristics as an inductor. The stray capacitance generated between the conductor patterns B4, B5, and B51, the conductor pattern B6, and the lead-out portion B6a can be increased by being positioned between the windings, so that the multilayer body 50 becomes the second multilayer portion 50b (nonmagnetic). Compared with the case where only the body layers A51 to A57 and A9 to A12) are used, the trap frequency is reduced. As a result, the trap frequency can be easily adjusted without having to re-examine the design of the multilayer trap component from the beginning by further laminating the nonmagnetic material layer A58 constituting the first multilayer portion 50a to form the multilayer body 50. It becomes possible.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments. For example, in the first to fifth embodiments, the first stacked portions 10a, 20a, 30a, 40a, and 50a are configured by one nonmagnetic material layer A1, A22, A33, A48, and A58 having a high dielectric constant. However, the first stacked unit may be configured by stacking two or more nonmagnetic layers having a high dielectric constant. Further, if the dielectric constant is higher than that of the second stacked portions 10b, 20b, 30b, 40b, 50b, the first stacked portions 10a, 20a, 30a, 40a and 50a may be configured. In addition, a plurality of non-magnetic layers having a high dielectric constant are not continuously stacked, but a plurality of non-magnetic layers having a high dielectric constant and a plurality of non-magnetic layers having a low dielectric constant are stacked in any order. It may be. In these cases, it is preferable that the total thickness of the non-magnetic layer having a high dielectric constant is smaller than half of the thickness of the stacked body 10 in the stacking direction.

It is a perspective view which shows the multilayer trap component which concerns on 1st-5th embodiment. It is a longitudinal cross-sectional view which shows the multilayer trap component which concerns on 1st Embodiment. It is a disassembled perspective view for demonstrating the structure of the laminated body with which the multilayer trap component which concerns on 1st Embodiment is provided. It is a longitudinal cross-sectional view which shows the multilayer trap component which concerns on 2nd Embodiment. It is a disassembled perspective view for demonstrating the structure of the laminated body with which the multilayer trap component which concerns on 2nd Embodiment is provided. It is a longitudinal cross-sectional view which shows the multilayer trap component which concerns on 3rd Embodiment. It is a disassembled perspective view for demonstrating the structure of the laminated body with which the multilayer trap component which concerns on 3rd Embodiment is provided. It is a longitudinal cross-sectional view which shows the multilayer trap component which concerns on 4th Embodiment. It is a disassembled perspective view for demonstrating the structure of the laminated body with which the multilayer trap component which concerns on 4th Embodiment is provided. It is a longitudinal cross-sectional view which shows the multilayer trap component which concerns on 5th Embodiment. It is a disassembled perspective view for demonstrating the structure of the laminated body with which the multilayer trap component which concerns on 5th Embodiment is provided.

Explanation of symbols

  1 to 5 ... Laminated trap parts 10, 20, 30, 40, 50 ... Laminated body, 10a, 20a, 30a, 40a, 50a ... First laminated portion, 10b, 20b, 30b, 40b, 50b ... Second , 12, 14 ... external electrodes, A1-A12, A21, A22, A31-A33, A41-A48, A51-A58 ... nonmagnetic layers, L1, L2 ... coils, S1, S2 ... side surfaces, S3 S4: outer surface.

Claims (4)

A laminate in which a plurality of nonmagnetic layers are laminated;
A coil provided inside the laminate;
A first external electrode disposed on the outer surface of the laminate and electrically connected to one end of the coil;
A second external electrode disposed on the outer surface of the laminate and electrically connected to the other end of the coil;
The laminated body includes a first laminated portion including at least one first nonmagnetic material layer among the plurality of nonmagnetic materials, and at least one second nonmagnetic material among the plurality of nonmagnetic materials. Having a second laminated portion made of a body layer,
At least a part of the coil is located inside the second laminated portion,
The multilayer trap component, wherein a dielectric constant of the first laminated portion is higher than a dielectric constant of the second laminated portion. The stacked body has a pair of outer surfaces intersecting with the stacking direction of the plurality of nonmagnetic layers and has only one first stacked portion,
The first stacked portion has a pair of side surfaces that intersect with the stacking direction of the plurality of nonmagnetic layers,
The one side surface of the pair of side surfaces of the first stacked portion constitutes one outer surface of the pair of outer surfaces of the stacked body. Multilayer trap parts.   3. The multilayer trap part according to claim 1, wherein the coil is entirely located inside the second multilayer part. 4. The laminate has only one first laminate portion,
2. The multilayer trap component according to claim 1, wherein the first multilayer portion is located between windings of the coil.

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