JP2007311567A - Capacitor module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a capacitor module which stably does an expected decoupling in a wide frequency band. <P>SOLUTION: A first and second two-terminal capacitors CAP12, CAP13 are connected in parallel to a first and second connecting electrodes 104, 105 of a multi-terminal capacitor CAP11, and a first and second outer electrodes 102, 103 of the multi-terminal capacitor CAP11 are used for signal input/output terminals of the capacitor module 10 to dominantly act only the ESR of the capacitor CAP 11 on the ZF characteristic of the module 10, thereby making the impedance in a specified frequency range equal or approximate to the ESR of the multi-terminal capacitor CAP11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a capacitor module suitable for decoupling applications.

  For example, a power supply line of an ASIC (Application Specific Integrated Circuit) such as an IC includes a plurality of capacitors so that sufficient charge can be supplied to an ASIC that is intended for decoupling and that is highly integrated and increased in speed. Connected in parallel.

  FIG. 1 is a circuit diagram in which three capacitors CAP1 to CAP3 are connected in parallel to the power supply line of the ASIC. In this circuit diagram, each of the capacitors CAP1 to CAP3 is shown as an equivalent circuit.

A multilayer capacitor as shown in FIG. 2 is generally used for each of the capacitors CAP1 to CAP3. The multilayer capacitor includes a rectangular parallelepiped multilayer body 1 having a predetermined length, width, and height, and the multilayer body 1 The first external electrode 2 and the second external electrode 3 are provided on one side and the other side in the longitudinal direction. The multilayer body 1 includes a first internal conductor layer 5 having an external electrode lead portion 5a on one side edge in the length direction, and a second internal conductor layer 6 having an external electrode lead portion 6a on the other side edge in the longitudinal direction. , Each of the first inner conductor layers 5 is connected to the first outer electrode 2 and each second inner conductor layer is formed by alternately laminating and integrating the dielectric layers 4. The lead portion 6 a of 6 is connected to the second external electrode 3.
US Pat. No. 6,525,622 US Pat. No. 6,606,012

  Capacitors having different electrostatic capacities are generally used for the capacitors CAP1 to CAP3 in order to enable decoupling in a wide frequency band.

  FIG. 3 is a ZF (Z: impedance, F: frequency) characteristic diagram when three capacitors CAP1 to CAP3 having different electrostatic capacities are connected in parallel to the power supply line of the ASIC. The broken lines in the figure indicate the ZF characteristics ZFCt when the capacitors C1 to C3 satisfying C3> C2> C1 as the capacitors CAP1 to CAP3. For reference, the ZF of each capacitor CAP1 to CAP3 Characteristics ZFC1 to ZFC3 are shown by solid lines.

  As can be seen from the ZF characteristic ZFCt indicated by the broken line in the figure, when three capacitors CAP1 to CAP3 having different capacitances are connected in parallel, each ESR at the resonance points f1 to f3 of the capacitors CAP1 to CAP3. (Equivalent series resistance) appears as an impedance, and the ZF characteristics of the capacitors CAP1 to CAP3 also appear as they are near the resonance points f1 to f3, so that the impedance Z changes greatly according to the frequency F.

  In terms of decoupling, it can be said that the impedance in the ZF characteristic ZFCt is preferably low. For this requirement, it is sufficient to use multilayer capacitors having low impedance as the capacitors CAP1 to CAP3.

  However, it is not preferable that the impedance Z greatly changes according to the frequency F as in the ZF characteristic ZFCt from the viewpoint of stably performing decoupling in a wide frequency band. In other words, if the ZF characteristic ZFCt having a flat impedance is obtained, the desired decoupling can be stably performed in a wide frequency band.

  The present invention was created in view of the above circumstances, and an object of the present invention is to provide a capacitor module capable of stably performing desired decoupling in a wide frequency band.

  In order to achieve the above object, a capacitor module of the present invention includes a first inner conductor layer having an outer electrode lead portion and a connection electrode lead portion, an outer electrode lead portion and a connection electrode lead of the first inner conductor layer. A second inner conductor layer having an outer electrode lead portion and a connecting electrode lead portion, a third inner conductor layer having a connecting electrode lead portion, and a connecting electrode lead portion of the third inner conductor layer. A fourth internal conductor layer having a connection electrode lead-out portion at a different position, a first external electrode to which the external electrode lead-out portion of the first internal conductor layer is connected, and an external electrode lead-out portion of the second internal conductor layer The second external electrode to which the first internal conductor layer is connected, the first connection electrode to which the connection electrode lead portion of the first internal conductor layer and the connection electrode lead portion of the third internal conductor layer are connected, and the connection of the second internal conductor layer Lead portion for electrode and fourth inner conductor layer Different from a multi-terminal capacitor having at least a second connection electrode to which a connection electrode lead portion is connected, a first internal conductor layer having an external electrode lead portion, and an external electrode lead portion of the first internal conductor layer The second internal conductor layer having the external electrode lead portion at the position, the first external electrode to which the external electrode lead portion of the first internal conductor layer is connected, and the external electrode lead portion of the second internal conductor layer are connected And at least one two-terminal capacitor having a larger capacitance than the multi-terminal capacitor, and the first external electrode of the at least one two-terminal capacitor is a second terminal of the multi-terminal capacitor. The second external electrode of at least one two-terminal capacitor is electrically connected to the second connection electrode of the multi-terminal capacitor, and the first external electrode and the second external electrode of the multi-terminal capacitor are connected to each other. Capacitors has a signal input and output terminals of the module, and its features in that.

  When this capacitor module is applied to, for example, an ASIC power supply line, one of the first external electrode and the second external electrode of the multi-terminal capacitor is connected to the power supply line and the other is connected to the ground (GND) side.

  In this capacitor module, since at least one two-terminal capacitor is connected in parallel to the first and second connection electrodes of the multi-terminal capacitor, only the ESR (equivalent series resistance) of the multi-terminal capacitor has its ZF characteristics. The ESR of at least one two-terminal capacitor does not contribute to the ZF characteristics. In short, even if the ESR of at least one two-terminal capacitor is lower than the ESR of the multi-terminal capacitor, the impedance in a predetermined frequency range is the same as or close to that of the multi-terminal capacitor.

  As a result, a ZF characteristic is obtained in which the impedance becomes flat in a predetermined frequency range, so that the impedance can be prevented from greatly changing according to the frequency, and the desired decoupling can be stably performed in a wide frequency band. Can do.

  According to the present invention, it is possible to provide a capacitor module capable of stably performing desired decoupling in a wide frequency band.

  The above object and other objects, structural features, and operational effects of the present invention will become apparent from the following description and the accompanying drawings.

  FIG. 4 is a top view of an essential part of the capacitor module 10 to which the present invention is applied. In the figure, 11 is a substrate, CAP11 is a multi-terminal capacitor, CAP12 is a first two-terminal capacitor, CAP13 is a second two-terminal capacitor, and the capacitance C11 of the multi-terminal capacitor CAP11 and the first two-terminal capacitor CAP12. The relationship between the capacitance C12 and the capacitance C13 of the second two-terminal capacitor CAP13 is C13> C12> C11.

  The substrate 11 includes four lands 12 corresponding to the four first external electrodes 102 of the multi-terminal capacitor CAP11 and four lands 13 corresponding to the four second external electrodes 103 of the multi-terminal capacitor CAP11. One land 14 corresponding to one first connection electrode 104 of the multi-terminal capacitor CAP11, one land 15 corresponding to one second connection electrode 105 of the multi-terminal capacitor CAP11, and a first One land 16 corresponding to one first external electrode 202 of the two-terminal capacitor CAP12, one land 17 corresponding to one second external electrode 203 of the first two-terminal capacitor CAP12, One land 18 corresponding to one first external electrode 302 of the second two-terminal capacitor CAP13 and one second outer electrode of the second two-terminal capacitor CAP13. And a single land 19 corresponding to the electrode 303.

  In addition, the substrate 11 includes the land 14 corresponding to the first connection electrode 104 of the multi-terminal capacitor CAP11, the land 16 corresponding to the first external electrode 202 of the first two-terminal capacitor CAP12, and the second two-terminal capacitor CAP13. The first conductive trace 20 connecting the land 18 corresponding to the first external electrode 302, the land 15 corresponding to the second connection electrode 105 of the multi-terminal capacitor CAP11, and the second external electrode 203 of the first two-terminal capacitor CAP12 Corresponding to the second conductive trace 21 connecting the corresponding land 17 and the land 19 corresponding to the second external electrode 303 of the second two-terminal capacitor CAP13, and to the four first external electrodes 102 of the multi-terminal capacitor CAP11, respectively. A first input / output trace (not shown) connected to the four lands 12 and a multi-terminal capacitor Respectively to the four second external electrodes 103 of the AP11 and a second output the trace that is connected to the corresponding four lands 13 (not shown).

  The first conduction trace 20 and the second conduction trace 21 are formed on the upper surface or the inside of the substrate 11, and the first input / output trace and the second input / output trace are formed on the inside or the lower surface of the substrate 11.

  FIG. 5 is an external perspective view of the multi-terminal capacitor CAP11 shown in FIG. The multi-terminal capacitor CAP11 includes a rectangular parallelepiped laminated body 101 having a predetermined length, width, and height, four first external electrodes 102, four second external electrodes 103, and one first first electrode. A connection electrode 104 and one second connection electrode 105 are provided.

  The four first external electrodes 102 have a U shape having a wraparound portion 102a and a side surface portion 102b, and the four second external electrodes 103 also have a U shape having a wraparound portion 102a and a side surface portion 102b. Thus, two first external electrodes 102 and two second external electrodes 103 are alternately arranged on one side in the width direction of the multilayer body 101 at intervals, and on the other side in the width direction of the multilayer body 101. The two first external electrodes 102 and the two second external electrodes 103 are alternately arranged at intervals. Also, the two first external electrodes 102 on one side in the width direction face the two second external electrodes 103 on the other side in the width direction, and the two first external electrodes 102 on the other side in the width direction have a width. It faces the two second external electrodes 103 on one side in the direction.

  One first connection electrode 104 and one second connection electrode 105 form a planar shape, and one first connection electrode 104 is arranged on one side surface in the longitudinal direction of the laminate 101. One second connection electrode 105 is disposed on the other side surface of the body 101 in the length direction.

  The multilayer body 101 has a structure in which the dielectric layer 106 and the first to sixth inner conductor layers 107 to 112 are laminated in the width direction in a predetermined order shown in FIG. 6 and integrated.

  The first inner conductor layer 107 has two external electrode lead portions 107a on one side edge and the other side edge in the height direction, and one connection electrode lead portion 107b on one side edge in the length direction. Have. Two lead portions 107a on one side edge in the height direction of the first inner conductor layer 107 correspond to and are connected to the upper wrap-around portions 102a of the two first outer electrodes 102 on the left side of FIG. The two lead-out portions 107a on the other side edge correspond to and are connected to the lower wrap-around portions 102a on the left side of the two first external electrodes 102 on the left side in FIG. Further, one connecting electrode lead portion 107b on one side edge in the length direction of the first inner conductor layer 107 corresponds to and is connected to one first connecting electrode 104 on the left side of FIG. The first inner conductor layer 107 corresponds to the “first inner conductor layer of a multi-terminal capacitor” in the claims.

  The second inner conductor layer 108 has two external electrode lead portions 108a on one side edge and the other side edge in the height direction, and one connection electrode lead portion 108b on the other side edge in the length direction. Have. The two lead portions 108a on one side edge in the height direction of the second inner conductor layer 108 correspond to and are connected to the upper wrap-around portions 103a of the two second external electrodes 103 on the left side in FIG. The two lead portions 108a on the other side edge correspond to and are connected to the lower wrap-around portions 103a on the two second external electrodes 103 on the left side in FIG. Further, one connecting electrode lead-out portion 108b on the other side edge in the longitudinal direction of the second inner conductor layer 108 corresponds to and is connected to one second connecting electrode 105 on the right side of FIG. The second inner conductor layer 108 corresponds to the “second inner conductor layer of a multi-terminal capacitor” in the claims.

  Similar to the first inner conductor layer 107, the third inner conductor layer 109 has two external electrode lead portions 109a on one side edge and the other side edge in the height direction, and on one side edge in the length direction. One connecting electrode lead portion 109b is provided. The two lead portions 109a on one side edge in the height direction of the third inner conductor layer 109 correspond to and are connected to the upper wrap-around portions 102a of the two first outer electrodes 102 on the right side in FIG. The two lead portions 109a on the other side edge correspond to and are respectively connected to the lower wraparound portions 102a of the two first external electrodes 102 on the right side of FIG. Further, one connecting electrode lead portion 109b on one side edge in the length direction of the third inner conductor layer 109 corresponds to and is connected to one first connecting electrode 104 on the left side of FIG. Since the third inner conductor layer 109 has the same polarity as the first inner conductor layer 107, the third inner conductor layer 109 substantially corresponds to the “first inner conductor layer of a multi-terminal capacitor” in the claims.

  Similar to the second inner conductor layer 108, the fourth inner conductor layer 110 has two external electrode lead portions 110 a on one side edge and the other side edge in the height direction, and on the other side edge in the length direction. One connecting electrode lead part 110b is provided. The two lead portions 110a on one side edge in the height direction of the fourth inner conductor layer 110 correspond to and are connected to the upper wrap-around portions 103a of the two second outer electrodes 103 on the right side in FIG. The two lead portions 110a on the other side edge correspond to and are respectively connected to the lower wraparound portions 103a of the two second external electrodes 103 on the right side in FIG. Further, one connecting electrode lead portion 110b on the other side edge in the length direction of the fourth inner conductor layer 110 corresponds to and is connected to one second connecting electrode 105 on the right side of FIG. Since the polarity of the fourth inner conductor layer 110 is the same as that of the second inner conductor layer 108, the fourth inner conductor layer 110 substantially corresponds to the “second inner conductor layer of a multi-terminal capacitor” in the claims.

  The fifth internal electrode layer 111 has one connecting electrode lead portion 111a on one side edge in the length direction. One lead portion 111a on one side edge in the longitudinal direction of the fifth inner conductor layer 111 corresponds to and is connected to one first connection electrode 104 on the left side of FIG. The fifth internal electrode layer 111 corresponds to the “third internal conductor layer of the multi-terminal capacitor” in the claims.

  The sixth internal electrode layer 112 has one connection electrode lead portion 112a on the other side edge in the length direction. One lead portion 112a on the other side edge in the longitudinal direction of the sixth inner conductor layer 112 corresponds to and is connected to one second connection electrode 105 on the right side of FIG. The sixth internal electrode layer 112 corresponds to the “fourth internal conductor layer of a multi-terminal capacitor” in the claims.

  As shown in FIG. 4, the multi-terminal capacitor CAP11 includes four first external electrodes 102, four second external electrodes 103, one first connection electrode 104, and one second connection electrode 105. It is mounted on the substrate 11 in a state where it is connected to the corresponding lands 12, 13, 14, and 15.

  FIG. 7 is an external perspective view of the first two-terminal capacitor CAP12 and the second two-terminal capacitor CAP13 shown in FIG. Each of the two-terminal capacitors CAP12 and CAP13 includes a rectangular parallelepiped laminated body 201 and 202 having a predetermined length, width and height, one first external electrode 202 and 302, and one second external electrode 203, 303.

  One first external electrode 202, 302 and one second external electrode 203, 303 form a cap shape, and one first external electrode is disposed on one side in the longitudinal direction of the stacked body 201, 301. Electrodes 202 and 302 are disposed, and one second external electrode 203 and 303 is disposed on the other side in the longitudinal direction of the stacked bodies 201 and 301.

  The laminates 201 and 301 have a structure in which the dielectric layers 204 and 304 and the first and second inner conductor layers 205, 305, 206, and 306 are laminated in the height direction in the order shown in FIG. ing.

  The first inner conductor layers 205, 305 have one outer electrode lead portion 205a, 305a on one side edge in the length direction. One lead-out portion 205a, 305a on one side edge in the longitudinal direction of the first inner conductor layers 205, 305 corresponds to and is connected to one first outer electrode 202, 302 on the left side of FIG. The first inner conductor layers 205 and 305 correspond to the “first inner conductor layer of a two-terminal capacitor” in the claims.

  The second inner conductor layers 206, 306 have one outer electrode lead portion 206a, 306a on the other side edge in the length direction. One lead-out portion 206a, 306a on the other side edge in the length direction of the second inner conductor layers 206, 306 corresponds to and is connected to one second outer electrode 203, 303 on the right side of FIG. The second inner conductor layers 206 and 306 correspond to the “second inner conductor layer of a two-terminal capacitor” in the claims.

  As shown in FIG. 4, each of the first and second two-terminal capacitors CAP12 and CAP13 includes one land 16 corresponding to one first external electrode 202 and 302 and one second external electrode 203 and 303, respectively. , 17, 18, 19 are mounted on the substrate 11.

  In the capacitor module 10 shown in FIG. 4, the first external electrodes 202 and 302 of the first and second two-terminal capacitors CAP12 and CAP13 are electrically connected to the first connection electrode 104 of the multi-terminal capacitor CAP11 through the first conductive trace 20. Since the second external electrodes 203 and 303 of the first and second two-terminal capacitors CAP12 and CAP13 are electrically connected to the second connection electrode 105 of the multi-terminal capacitor CAP11 through the second conductive trace 21, in other words, Since the first and second two-terminal capacitors CAP12 and CAP13 are connected in parallel to the first and second connection electrodes 104 and 105 of the multi-terminal capacitor CAP11, the first input / output traces (not shown) are connected via the four lands 12. The four first external electrodes 102 and the four lands 13 of the multi-terminal capacitor CAP11 connected to (omitted). Via four second external electrodes 103 of the second output the trace multiterminal capacitor CAP11 are connected to (not shown) a signal input and output terminals of the capacitor module 10.

  FIG. 9 is a circuit diagram in which the capacitor module 10 shown in FIG. 4 is connected to a power supply line of an ASIC (Application Specific Integrated Circuit). In this circuit diagram, each of the capacitors CAP11 to CAP13 is shown as an equivalent circuit. In the equivalent circuit of the multi-terminal capacitor CAP11, the capacitance formed mainly by the first and second internal electrodes 107 and 108 is represented by C11a, and is formed mainly by the third and fourth internal electrodes 109 and 110. The capacitance is expressed by C11b.

  As can be seen from the figure, when the capacitor module 10 shown in FIG. 4 is connected to the power supply line of the ASIC, the first input / output traces (not shown) leading to the four first external electrodes 102 of the multi-terminal capacitor CAP11 are connected. A second input / output trace (not shown) connected to the power supply line and leading to the four second external electrodes 103 of the multi-terminal capacitor CAP11 is connected to the ground (GND) side. As described above, the first and second two-terminal capacitors CAP12 and CAP13 are connected in parallel to the first and second connection electrodes 104 and 105 of the multi-terminal capacitor CAP11. The first external electrodes 202 and 302 and the second external electrodes 203 and 303 of the two-terminal capacitors CAP12 and CAP13 are not directly connected to the power supply line and the ground (GND) side.

  FIG. 10 is a ZF (Z: impedance, F: frequency) characteristic diagram of the capacitor module 10 shown in FIG. The broken line in the figure is the ZF characteristic ZFCt of the capacitor module 10 itself, and the ZF characteristics ZFC11 to ZFC13 of the capacitors CAP11 to CAP13 are indicated by solid lines for reference.

  Incidentally, the multi-terminal capacitor CAP11 has an ESR (equivalent series) depending on the number and width of the lead portions 107a, 107b, 108a, 108b, 109a, 109b, 110a, 110b, 111a, 112a of the first to sixth inner conductor layers 107-112. Since the resistance Z is adjusted to be slightly higher, the impedance Z in the vicinity of the resonance point is slightly flat compared to the ZF characteristics ZFC12 and ZFC13 of the first and second two-terminal capacitors CAP12 and CAP13.

  As can be seen from the ZF characteristic ZFCt indicated by the broken line in the figure, the capacitor module 10 shown in FIG. 4 differs from the ZF characteristic indicated by the broken line in FIG. ZF characteristics that flatten out are obtained.

  That is, in the capacitor module 10 shown in FIG. 4, the first and second two-terminal capacitors CAP12 and CAP13 are connected in parallel to the first and second connection electrodes 104 and 105 of the multi-terminal capacitor CAP11. Only the ESR of the multi-terminal capacitor CAP11 (see R11 in FIG. 9) acts predominantly in the ZF characteristic ZFCt, and the ESR (see R12 in FIG. 9) of the first two-terminal capacitor CAP12 and the second two-terminal capacitor The ESR of CAP13 (see R13 in FIG. 9) is not involved in the ZF characteristic ZFCt.

  In short, the ESR of the first two-terminal capacitor CAP12 (see R12 in FIG. 9) and the ESR of the second two-terminal capacitor CAP13 (see R13 in FIG. 9) are from the ESR of the multi-terminal capacitor CAP11 (see R11 in FIG. 9). The impedance Z in the frequency f11 to f12 range is the same as or close to the ESR of the multi-terminal capacitor CAP11 (see R11 in FIG. 9).

  Of course, it goes without saying that the frequency ranges f11 to f12 in which the impedance Z is flat can be arbitrarily selected by replacing the capacitors CAP11 to CAP13 with capacitors having different capacitances.

  As described above, according to the capacitor module 10 shown in FIG. 4, since the ZF characteristic ZFCt in which the impedance Z becomes flat in the range of the frequencies f11 to f12 is obtained, it is possible to prevent the impedance from greatly changing according to the frequency. Thus, the desired decoupling can be stably performed in a wide frequency band. Further, the frequency ranges f11 to f12 in which the impedance Z becomes flat can be arbitrarily changed by appropriately replacing the capacitors CAP11 to CAP13 with capacitors having different capacitances. Furthermore, the value of the impedance Z of the flat portion of the ZF characteristic ZFCt can be arbitrarily changed by adjusting the ESR of the multi-terminal capacitor CAP11.

  FIG. 11 is a circuit diagram corresponding to FIG. 9 showing a first modification of the capacitor module 10 shown in FIG. 4 differs from the capacitor module 10 shown in FIG. 4 in that the second two-terminal capacitor CAP13 is excluded and the multi-terminal capacitor CAP11 and the first two-terminal capacitor CAP12 are used. The module 10-1 is constructed. Since other configurations and the connection method to the power supply line are not changed, the description thereof is omitted.

  FIG. 12 is a ZF characteristic diagram of the capacitor module 10-1 shown in FIG. The broken line in the figure is the ZF characteristic ZFCt 'of the capacitor module itself, and the ZF characteristics ZFC11 and ZFC12 of the capacitors CAP11 and CAP12 are indicated by solid lines for reference.

  As can be seen from the ZF characteristic ZFCt ′ shown by the broken line in FIG. 12, in the case of the capacitor module 10-1 shown in FIG. 12, the second two-terminal capacitor CAP13 having a large capacitance C13 is excluded. Although the range of the frequencies f11 ′ to f12 at which the impedance Z becomes flat becomes narrow, the same effect as the capacitor module 10 shown in FIG. 4 can be obtained.

  FIG. 13 is a circuit diagram corresponding to FIG. 9 showing a second modification of the capacitor module 10 shown in FIG. The capacitor module 10-2 shown in the figure is different from the capacitor module 10 shown in FIG. 4 in that a third two-terminal capacitor having a capacitance C14 larger than the capacitance C13 of the second two-terminal capacitor CAP13. CAP14 is added, and this is parallel to the first and second connection electrodes 104 and 105 of the multi-terminal capacitor CAP11 through the first and second conductive traces 20 and 21 in the same manner as the first and second two-terminal capacitors CAP12 and CAP13. It is at the point of connection. Since other configurations and the connection method to the power supply line are not changed, the description thereof is omitted.

  FIG. 14 is a ZF characteristic diagram of the capacitor module 10-2 shown in FIG. The broken line in the figure is the ZF characteristic ZFCt ″ of the capacitor module itself, and the ZF characteristics ZFC11 to ZFC14 of the capacitors CAP11 to CAP14 are shown by solid lines for reference.

  As can be seen from the ZF characteristic ZFCt ″ shown by the broken line in FIG. 13, in the case of the capacitor module 10-2 shown in FIG. 13, the third capacitance 2 is larger than the second two-terminal capacitor CAP 13. By adding the terminal capacitor CAP14, the range of the frequencies f11 ″ to f12 where the impedance Z becomes flat can be expanded. Other functions and effects are the same as those of the capacitor module 10 shown in FIG.

  FIG. 15 is a top view of relevant parts showing a third modification of the capacitor module 10 shown in FIG. 4 differs from the capacitor module 10 shown in FIG. 4 in that a multi-terminal capacitor CAP15 having a different configuration is used instead of the multi-terminal capacitor CAP11. The configuration of the substrate 11 is changed in accordance with the form. The capacitance C15 of the multi-terminal capacitor CAP15 is smaller than the capacitance C12 of the first two-terminal capacitor CAP12.

  The substrate 11 includes one land 12 ′ corresponding to one first external electrode 502 of the multi-terminal capacitor CAP15 and one land corresponding to one second external electrode 503 of the multi-terminal capacitor CAP15. 13 ′, one land 14 ′ corresponding to one first connection electrode 504 of the multi-terminal capacitor CAP15, and one land 15 ′ corresponding to one second connection electrode 505 of the multi-terminal capacitor CAP15. And one land 16 corresponding to one first external electrode 202 of the first two-terminal capacitor CAP12 and one piece corresponding to one second external electrode 203 of the first two-terminal capacitor CAP12. Land 17, one land 18 corresponding to one first external electrode 302 of the second two-terminal capacitor CAP 13, and one second two-terminal capacitor CAP 13 And a single land 19 corresponding to the second external electrode 303.

  The substrate 11 includes a land 14 ′ corresponding to the first connection electrode 504 of the multi-terminal capacitor CAP15, a land 16 corresponding to the first external electrode 202 of the first two-terminal capacitor CAP12, and the second two-terminal capacitor CAP13. A first conductive trace 20 ′ connecting the land 18 corresponding to the first external electrode 302, a land 15 ′ corresponding to the second connection electrode 505 of the multi-terminal capacitor CAP15, and a second external of the first two-terminal capacitor CAP12. A second conductive trace 21 ′ for connecting the land 17 corresponding to the electrode 203 and the land 19 corresponding to the second external electrode 303 of the second two-terminal capacitor CAP13, and one first external electrode of the multi-terminal capacitor CAP15. A first input / output trace (not shown) connected to one land 12 'corresponding to 502, a multi-terminal condenser; And a second output the trace that is connected to one land 13 'corresponds to one of the second external electrode 503 of CAP15 (not shown).

  The first conduction trace 20 ′ and the second conduction trace 21 ′ are formed on the upper surface or inside of the substrate 11, and the first input / output trace and the second input / output trace are formed on the inside or lower surface of the substrate 11.

  FIG. 16 is an external perspective view of the multi-terminal capacitor CAP15 shown in FIG. The multi-terminal capacitor CAP15 includes a rectangular parallelepiped laminated body 501 having a predetermined length, width, and height, one first external electrode 502, one second external electrode 503, and one first A connection electrode 504 and one second connection electrode 505 are provided.

  One first external electrode 502 and one second external electrode 503 form a cap shape, and one first external electrode 502 is disposed on one side in the longitudinal direction of the stacked body 501. One second external electrode 503 is disposed on the other side in the length direction of the multilayer body 501.

  One first connection electrode 504 and one second connection electrode 505 are U-shaped, and one first connection electrode 504 is arranged at the center of one side of the laminated body 501 in the width direction. In addition, one second connection electrode 505 is disposed in the center of the other side portion in the width direction of the multilayer body 501.

  The multilayer body 501 has a structure in which a dielectric layer 506 and first to fourth inner conductor layers 507 to 510 are laminated in the height direction in a predetermined order shown in FIG. 17 and integrated.

  The first inner conductor layer 507 has one external electrode lead portion 507a on one side edge in the length direction and one connection electrode lead portion 507b on one side edge in the width direction. One lead portion 507a on one side edge in the length direction of the first inner conductor layer 507 corresponds to and is connected to one first outer electrode 502 on the left side in FIG. 16, and one lead on one side edge in the width direction. The part 507b is connected to one first connection electrode 504 on the right side of FIG. The first inner conductor layer 507 corresponds to the “first inner conductor layer of a multi-terminal capacitor” in the claims.

  The second inner conductor layer 508 has one external electrode lead portion 508a on the other side edge in the length direction and one connection electrode lead portion 508b on the other side edge in the width direction. One lead portion 508a on the other side edge in the length direction of the second inner conductor layer 508 corresponds to and is connected to one second outer electrode 503 on the right side in FIG. 16, and one lead on the other side edge in the width direction. The part 508b is connected to one second connection electrode 505 on the left side of FIG. The second inner conductor layer 508 corresponds to the “second inner conductor layer of a multi-terminal capacitor” in the claims.

  The third inner conductor layer 509 has one connecting electrode lead portion 509a on one side edge in the width direction. One lead portion 509a on one side edge in the width direction of the third inner conductor layer 509 corresponds to and is connected to one first connection electrode 504 on the right side of FIG. The third inner conductor layer 509 corresponds to the “third inner conductor layer of a multi-terminal capacitor” in the claims.

  The fourth inner conductor layer 510 has one connecting electrode lead portion 510a on the other side edge in the width direction. One lead portion 510a on the other side edge in the width direction of the fourth inner conductor layer 510 corresponds to and is connected to one second connection electrode 505 on the left side of FIG. The fourth inner conductor layer 510 corresponds to the “fourth inner conductor layer of a multi-terminal capacitor” in the claims.

  As shown in FIG. 15, the multi-terminal capacitor CAP15 includes one first external electrode 502, one second external electrode 503, one first connection electrode 504, and one second connection electrode 505. It is mounted on the substrate 11 in a state where it is connected to the corresponding lands 12 ', 13', 14 ', 15'.

  The configuration and mounting form of the first two-terminal capacitor CAP12 and the second two-terminal capacitor CAP13 are the same as those of the capacitor module 10 shown in FIG.

  In the capacitor module 10 shown in FIG. 15, the first external electrodes 202 and 302 of the first and second two-terminal capacitors CAP12 and CAP13 are electrically connected to the first connection electrode 504 of the multi-terminal capacitor CAP15 through the first conductive trace 20 ′. The second external electrodes 203 and 303 of the first and second two-terminal capacitors CAP12 and CAP13 are electrically connected to the second connection electrode 505 of the multi-terminal capacitor CAP15 through the second conductive trace 21 ′. Since the first and second two-terminal capacitors CAP12 and CAP13 are connected in parallel to the first and second connection electrodes 504 and 505 of the multi-terminal capacitor CAP15, the first input / output is performed via one land 12 ′. One first external electrode 502 of a multi-terminal capacitor CAP15 connected to a trace (not shown) and one label. One second external electrode 503 of the second output the trace multiterminal capacitor CAP15 are connected to (not shown) via the de 13 'is the signal input and output terminals of the capacitor module 10-3.

  FIG. 18 is a circuit diagram in which the capacitor module 10-3 shown in FIG. 15 is connected to the power line of the ASIC. In this circuit diagram, the capacitors CAP15, CAP12, and CAP13 are shown as equivalent circuits.

  As can be seen from the figure, when the capacitor module 10-3 shown in FIG. 15 is connected to the power line of the ASIC, a first input / output trace (not shown) leading to one external electrode 502 of the multi-terminal capacitor CAP15 is connected. A second input / output trace (not shown) connected to the power supply line and leading to one second external electrode 503 of the multi-terminal capacitor CAP15 is connected to the ground (GND) side. As described above, the first and second two-terminal capacitors CAP12 and CAP13 are connected in parallel to the first and second connection electrodes 504 and 505 of the multi-terminal capacitor CAP15. The first external electrodes 202 and 302 and the second external electrodes 203 and 303 of the two-terminal capacitors CAP12 and CAP13 are not directly connected to the power supply line and the ground (GND) side.

  Although the illustration of the ZF characteristic diagram of the capacitor module 10-3 shown in FIG. 15 is omitted, the basic functions and effects obtained by the capacitor module 10-3 are the same as those of the capacitor module shown in FIG.

  In the above-described embodiment, the multi-terminal capacitor CAP11 described with reference to FIGS. 5 and 6 and the multi-terminal capacitor CAP15 described with reference to FIGS. 16 and 17 are exemplified as the multi-terminal capacitor. As long as the capacitor substantially corresponds to the configuration of the multi-terminal capacitor specified in (1), it can be used as the multi-terminal capacitor as appropriate, and the same effect as described above can be obtained.

FIG. 3 is a circuit diagram in which three capacitors are connected in parallel to the power line of the ASIC. FIG. 2 is an external perspective view of the capacitor shown in FIG. 1 and a perspective view showing a layer configuration of a laminated body. It is a ZF characteristic diagram in the case where three capacitors having different capacitances are connected in parallel to the power supply line of the ASIC. It is a principal part top view of the capacitor module to which this invention is applied. FIG. 5 is an external perspective view of the multi-terminal capacitor shown in FIG. 4. It is a perspective view which shows the layer structure of the laminated body shown in FIG. FIG. 5 is an external perspective view of the two-terminal capacitor shown in FIG. 4. It is a perspective view which shows the layer structure of the laminated body shown in FIG. FIG. 5 is a circuit diagram in which the capacitor module shown in FIG. 4 is connected to the power line of the ASIC. FIG. 5 is a ZF characteristic diagram of the capacitor module shown in FIG. 4. FIG. 10 is a circuit diagram corresponding to FIG. 9 illustrating a first modification of the capacitor module illustrated in FIG. 4. FIG. 12 is a ZF characteristic diagram of the capacitor module shown in FIG. 11. FIG. 10 is a circuit diagram corresponding to FIG. 9 illustrating a second modification of the capacitor module illustrated in FIG. 4. FIG. 14 is a ZF characteristic diagram of the capacitor module shown in FIG. 13. FIG. 10 is a top view of relevant parts showing a third modification of the capacitor module shown in FIG. 4. FIG. 16 is an external perspective view of the multi-terminal capacitor shown in FIG. 15. It is a perspective view which shows the layer structure of the laminated body shown in FIG. FIG. 16 is a circuit diagram in which the capacitor module shown in FIG. 15 is connected to the power line of the ASIC.

Explanation of symbols

  10, 10-1, 10-2, 10-3 ... capacitor module, 11 ... substrate, 12-19, 12'-15 '... land, 20, 20' ... first conducting trace, 21, 21 '... first Conductive trace, CAP11 ... multi-terminal capacitor, 102 ... first external electrode, 103 ... second external electrode, 104 ... first connection electrode, 105 ... second connection electrode, 107 ... first internal conductor layer, 107a ... for external electrode Leading portion 107b: Connection electrode lead portion 108 ... Second internal conductor layer 108a ... External electrode lead portion 108b ... Connection electrode lead portion 109 109 Third internal conductor layer 109a ... External electrode lead portion 109b ... extraction part for connection electrode, 110 ... fourth internal conductor layer, 110a ... extraction part for external electrode, 110b ... extraction part for connection electrode, 111 ... fifth internal conductor layer, 111a ... extraction for connection electrode 112 ... Sixth internal conductor layer, 112a ... Connection electrode lead-out part, CAP15 ... Multi-terminal capacitor, 502 ... First external electrode, 503 ... Second external electrode, 504 ... First connection electrode, 505 ... Second connection electrode 507 ... first internal conductor layer, 507a ... extracting part for external electrode, 507b ... extracting part for connecting electrode, 508 ... second internal conductor layer, 508a ... extracting part for external electrode, 508b ... extracting part for connecting electrode, 509 3rd internal conductor layer, 509a ... Connection electrode lead-out portion, 510 ... 4th internal conductor layer, 110a ... Connection electrode lead-out portion, CAP12 to CAP14 ... 2-terminal capacitor, 202, 302, 402 ... 1st external electrode , 203, 303, 403, second external electrodes, 205, 305, first internal conductor layer, 206, 306, second internal conductor layer.

Claims (5)

The first inner conductor layer having the outer electrode lead portion and the connecting electrode lead portion, and the outer electrode lead portion and the connecting electrode at positions different from the outer electrode lead portion and the connecting electrode lead portion of the first inner conductor layer. A second inner conductor layer having a lead portion, a third inner conductor layer having a lead portion for connecting electrode, and a fourth inner portion having a lead portion for connecting electrode at a position different from the lead portion for connecting electrode of the third inner conductor layer. A conductor layer; a first external electrode to which an external electrode lead portion of the first internal conductor layer is connected; a second external electrode to which the external electrode lead portion of the second internal conductor layer is connected; and a first internal conductor A connection electrode lead portion of the third internal conductor layer and a connection electrode lead portion of the third internal conductor layer connected to each other; a connection electrode lead portion of the second internal conductor layer; and a connection electrode of the fourth internal conductor layer At least the second connecting electrode to which the lead portion is connected And multi-terminal capacitors with,
A first inner conductor layer having an outer electrode lead portion; a second inner conductor layer having an outer electrode lead portion at a position different from the outer electrode lead portion of the first inner conductor layer; and an outer portion of the first inner conductor layer. A first external electrode to which the electrode lead portion is connected; and a second external electrode to which the external electrode lead portion of the second internal conductor layer is connected, and at least one having a larger capacitance than the multi-terminal capacitor. A two-terminal capacitor,
The first external electrode of at least one two-terminal capacitor is electrically connected to the first connection electrode of the multi-terminal capacitor, and the second external electrode of at least one 2-terminal capacitor is electrically connected to the second connection electrode of the multi-terminal capacitor. The first external electrode and the second external electrode of the multi-terminal capacitor are signal input / output terminals of the capacitor module.
Capacitor module characterized by that. Corresponding to each of the first external electrode, the second external electrode, the first connection electrode, and the second connection electrode of the multi-terminal capacitor, and the first external electrode and the second external electrode of at least one two-terminal capacitor, respectively. A first conduction trace connecting the land corresponding to the first connection electrode of the multi-terminal capacitor and the land corresponding to the first external electrode of the at least one two-terminal capacitor, and the second connection of the multi-terminal capacitor A second conductive trace connecting a land corresponding to the electrode and a land corresponding to the second external electrode of at least one two-terminal capacitor; and a first connected to the land corresponding to the first external electrode of the multi-terminal capacitor. A substrate having an input / output trace and a second input / output trace connected to a land corresponding to the second external electrode of the multi-terminal capacitor;
The first external electrode, the second external electrode, the first connection electrode, and the second connection electrode of the multi-terminal capacitor are mounted on the substrate in a state of being connected to the corresponding lands, and the first external electrode of at least one two-terminal capacitor And the second external electrode is mounted on the substrate in a state of being connected to the corresponding land.
Capacitor module characterized by that. The multi-terminal capacitor includes a rectangular parallelepiped laminated body having a predetermined length, width, and height, a plurality of first external electrodes, a plurality of second external electrodes, a first connection electrode, and a single piece. A second connection electrode,
The laminate has a structure in which a dielectric layer and first to fourth inner conductor layers are laminated in a predetermined order in the width direction and integrated.
The plurality of first external electrodes and the plurality of second external electrodes are alternately arranged at intervals on opposite side surfaces of the laminate,
One first connection electrode is disposed on one of the other opposing side surfaces of the multilayer body, and one second connection electrode is disposed on the other of the other opposing side surfaces of the multilayer body,
The capacitor module according to claim 1 or 2, wherein The multi-terminal capacitor includes a rectangular parallelepiped laminate having a predetermined length, width, and height, one first external electrode, one second external electrode, one first connection electrode, and one piece. A second connection electrode,
The laminate has a structure in which a dielectric layer and first to fourth inner conductor layers are laminated in a predetermined order in the height direction and integrated,
One first external electrode is disposed on one of the opposite side surfaces of the multilayer body, and one second external electrode is disposed on the other of the opposite side surfaces of the multilayer body,
One first connection electrode is disposed on one of the other opposing side surfaces of the multilayer body, and one second connection electrode is disposed on the other of the other opposing side surfaces of the multilayer body,
The capacitor module according to claim 1 or 2, wherein As the two-terminal capacitor, two or more capacitors having a larger capacitance and different individual capacitances than the multi-terminal capacitor are used.
The capacitor module according to claim 1, wherein the capacitor module is any one of the above.

Images