WO2012066946A1 - 電子部品 - Google Patents
電子部品 Download PDFInfo
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- WO2012066946A1 WO2012066946A1 PCT/JP2011/075466 JP2011075466W WO2012066946A1 WO 2012066946 A1 WO2012066946 A1 WO 2012066946A1 JP 2011075466 W JP2011075466 W JP 2011075466W WO 2012066946 A1 WO2012066946 A1 WO 2012066946A1
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- parallel resonator
- conductor layer
- parallel
- axis direction
- coil
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/09—Filters comprising mutual inductance
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/17—Structural details of sub-circuits of frequency selective networks
- H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
- H03H7/1775—Parallel LC in shunt or branch path
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H2001/0021—Constructional details
- H03H2001/0085—Multilayer, e.g. LTCC, HTCC, green sheets
Definitions
- the present invention relates to an electronic component, and more particularly to an electronic component including a band pass filter including a plurality of LC parallel resonators.
- the multilayer bandpass filter includes a multilayer body and a plurality of LC parallel resonators.
- the laminated body is configured by laminating a plurality of dielectric layers.
- Each LC parallel resonator includes a capacitor electrode and an inductor electrode.
- the inductor electrode is formed in a loop shape. And the loop surfaces of each LC parallel resonator overlap.
- the degree of coupling between the inductor electrodes of the adjacent LC parallel resonators can be increased, and a wider band can be achieved.
- an object of the present invention is to provide an electronic component capable of reducing the degree of coupling between coils of an LC parallel resonator without increasing the size of the element.
- An electronic component according to an aspect of the present invention is provided on a stacked body formed by stacking a plurality of insulator layers, a via-hole conductor extending in the stacking direction, and the insulator layer.
- the first loop surface of the first LC parallel resonator and the second loop surface of the second LC parallel resonator are parallel to the stacking direction and are mutually Are parallel to each other and overlap each other at least partially when viewed in plan from the normal direction of the first loop surface, and the first loop surface is located above and / or below the stacking direction. Characterized by protruding from the second loop surface To.
- the degree of coupling between the coils of the LC parallel resonator can be adjusted without increasing the size of the element.
- FIGS. 4A to 4H are cross-sectional structural views of the electronic component according to the first modification or the electronic component according to the eighth modification, respectively. It is the graph which showed the 1st simulation result. It is the graph which showed the 1st simulation result. It is the graph which showed the 2nd simulation result. It is the graph which showed the 3rd simulation result. It is the graph which showed the 4th simulation result. It is the graph which showed the 5th simulation result.
- FIG. 1 is an external perspective view of an electronic component 10 according to an embodiment of the present invention.
- FIG. 2 is an exploded perspective view of the multilayer body 12 of the electronic component 10.
- FIG. 3 is an equivalent circuit diagram of the electronic component 10. 1 and 2, the z-axis direction indicates the stacking direction. Further, the x-axis direction indicates a direction along the long side of the electronic component, and the y-axis direction indicates a direction along the short side of the electronic component 10.
- the electronic component 10 includes a multilayer body 12, external electrodes 14 (14a to 14d), LC parallel resonators LC1 to LC3, and lead conductor layers 20 (20a and 20b) and 28 (28a, 28b).
- the laminate 12 is formed by laminating insulating layers 16 (16a to 16g) made of a ceramic dielectric, and has a rectangular parallelepiped shape.
- the multilayer body 12 includes LC parallel resonators LC1 to LC3.
- the external electrode 14a is provided on the side surface on the negative side in the x-axis direction, and is used as an input electrode.
- the external electrode 14b is provided on the side surface on the positive direction side in the x-axis direction and is used as an output electrode.
- the external electrode 14c is provided on the side surface on the negative direction side in the y-axis direction and is used as a ground electrode.
- the external electrode 14d is provided on the side surface on the positive direction side in the y-axis direction and is used as a ground electrode.
- the insulator layer 16 has a rectangular shape as shown in FIG. 2, and is made of, for example, a ceramic dielectric.
- the insulator layers 16a to 16g are stacked so as to be arranged in this order in the z-axis direction.
- the surface on the positive side in the z-axis direction of the insulator layer 16 is referred to as a front surface
- the surface on the negative direction side in the z-axis direction of the insulator layer 16 is referred to as a back surface.
- LC parallel resonator LC1 includes a coil L1 and a capacitor C1. More specifically, the LC parallel resonator LC1 includes a via-hole conductor b1 to b9, a capacitor conductor layer 22a, a coil conductor layer 24a, and a ground conductor layer 26, and has a loop shape.
- the capacitor C1 includes a capacitor conductor layer 22a and a ground conductor layer 26.
- the ground conductor layer 26 is a conductor layer provided on the most negative direction side in the z-axis direction of the LC parallel resonator LC1, and is provided on the surface of the insulator layer 16g.
- the ground conductor layer 26 has a rectangular shape and covers substantially the entire surface of the insulator layer 16g.
- the capacitor conductor layer 22a is a conductor layer facing the ground conductor layer 26 via the insulator layer 16f, and is provided on the surface of the insulator layer 16f. As a result, a capacitance is generated between the capacitor conductor layer 22a and the ground conductor layer 26.
- the capacitor conductor layer 22a has a rectangular shape having a longitudinal direction in the y-axis direction, and is provided on the negative direction side in the x-axis direction from the intersection of the diagonal lines of the insulator layer 16f.
- the coil L1 is composed of via-hole conductors b1 to b9 and a coil conductor layer 24a.
- the via-hole conductors b1 to b4 penetrate the insulator layers 16b to 16e in the z-axis direction, respectively.
- the end of the via-hole conductor b4 on the negative direction side in the z-axis direction is connected to the capacitor conductor layer 22a.
- the via-hole conductors b1 to b4 constitute one via-hole conductor that is connected to the capacitor conductor layer 22a and extends in the z-axis direction.
- the via-hole conductors b5 to b9 respectively penetrate the insulator layers 16b to 16f in the z-axis direction, and are provided on the positive side in the y-axis direction from the via-hole conductors b1 to b4. Further, the end of the via-hole conductor b9 on the negative side in the z-axis direction is connected to the ground conductor layer 26. As a result, the via-hole conductors b5 to b9 constitute one via-hole conductor that is connected to the ground conductor layer 26 and extends in the z-axis direction.
- the coil conductor layer 24a is a conductor layer provided on the most positive side in the z-axis direction of the LC parallel resonator LC1, and is provided on the surface of the insulator layer 16b.
- the coil conductor layer 24a has a rectangular shape having a longitudinal direction in the y-axis direction, and is provided on the negative direction side in the x-axis direction from the intersection of diagonal lines of the insulator layer 16b.
- the coil conductor layer 24a is connected to the positive end in the z-axis direction of one via-hole conductor composed of the via-hole conductors b1 to b4 and the positive z-axis direction of one via-hole conductor composed of the via-hole conductors b5 to b9.
- the end on the positive direction side in the z-axis direction of the via-hole conductor b1 is connected to the end on the negative direction side in the y-axis direction of the coil conductor layer 24a.
- the end portion on the positive direction side in the z-axis direction of the via-hole conductor b5 is connected to the end portion on the positive direction side in the y-axis direction of the coil conductor layer 24a.
- the coil L1 has the connection point between the via-hole conductor b4 and the capacitor conductor layer 22a as one end, and passes through the via-hole conductors b1 to b4, the coil conductor layer 24a, the via-hole conductors b5 to b9, and the via-hole conductor b9 and the ground conductor. It has a U shape with the layer 26 as the other end.
- the LC parallel resonator LC1 configured as described above forms a loop surface S1 parallel to the yz plane.
- the loop surface S1 is a rectangular virtual plane formed by the LC parallel resonator LC1.
- LC parallel resonator LC2 includes a coil L2 and a capacitor C2. More specifically, the LC parallel resonator LC2 includes via-hole conductors b10 to b16, a capacitor conductor layer 22b, a coil conductor layer 24b, and a ground conductor layer 26, and has a loop shape.
- the capacitor C2 includes a capacitor conductor layer 22b and a ground conductor layer 26.
- the ground conductor layer 26 is a conductor layer provided on the most negative side in the z-axis direction of the LC parallel resonator LC2, and is provided on the surface of the insulator layer 16g.
- the ground conductor layer 26 has a rectangular shape and covers substantially the entire surface of the insulator layer 16g. That is, the ground conductor layer 26 of the capacitor C2 is common to the ground conductor layer 26 of the capacitor C1, and is provided on the surface of the same insulator layer 16g.
- the capacitor conductor layer 22b is a conductor layer facing the ground conductor layer 26 with the insulator layer 16f interposed therebetween, and is provided on the surface of the insulator layer 16f. As a result, a capacitance is generated between the capacitor conductor layer 22b and the ground conductor layer 26.
- the capacitor conductor layer 22b has a rectangular shape having a longitudinal direction in the y-axis direction, and is provided on the intersection of diagonal lines of the insulator layer 16f.
- the coil L2 is composed of via-hole conductors b10 to b16 and a coil conductor layer 24b.
- the via-hole conductors b10 to b12 penetrate the insulator layers 16c to 16e in the z-axis direction, respectively.
- the end of the via-hole conductor b12 on the negative side in the z-axis direction is connected to the capacitor conductor layer 22b.
- the via-hole conductors b10 to b12 constitute one via-hole conductor that is connected to the capacitor conductor layer 22b and extends in the z-axis direction.
- the via-hole conductors b13 to b16 penetrate the insulator layers 16c to 16f in the z-axis direction, respectively, and are provided on the positive side in the y-axis direction with respect to the via-hole conductors b10 to b12. Further, the end of the via-hole conductor b ⁇ b> 16 on the negative side in the z-axis direction is connected to the ground conductor layer 26.
- the via-hole conductors b13 to b16 constitute one via-hole conductor that is connected to the ground conductor layer 26 and extends in the z-axis direction.
- the coil conductor layer 24b is a conductor layer provided on the most positive side in the z-axis direction of the LC parallel resonator LC2, and is provided on the surface of the insulator layer 16c.
- the coil conductor layer 24b has a rectangular shape having a longitudinal direction in the y-axis direction, and is provided on the intersection of diagonal lines of the insulator layer 16c.
- the coil conductor layer 24b is connected to the positive end in the z-axis direction of one via-hole conductor composed of the via-hole conductors b10 to b12 and the positive z-axis direction of one via-hole conductor composed of the via-hole conductors b13 to b16. It is connected to the end on the direction side.
- the end portion on the positive side in the z-axis direction of the via-hole conductor b10 is connected to the end portion on the negative direction side in the y-axis direction of the coil conductor layer 24b.
- the end portion on the positive direction side in the z-axis direction of the via-hole conductor b13 is connected to the end portion on the positive direction side in the y-axis direction of the coil conductor layer 24b.
- the coil L2 has the connection point between the via-hole conductor b12 and the capacitor conductor layer 22b as one end, and passes through the via-hole conductors b10 to b12, the coil conductor layer 24b, and the via-hole conductors b13 to b16, and the via-hole conductor b16 and the ground conductor. It has a U shape with the layer 26 as the other end.
- the LC parallel resonator LC2 configured as described above forms a loop surface S2 parallel to the yz plane.
- the loop surface S2 is a rectangular virtual plane formed by the LC parallel resonator LC2.
- LC parallel resonator LC3 includes a coil L3 and a capacitor C3. More specifically, the LC parallel resonator LC3 includes a via-hole conductor b17 to b25, a capacitor conductor layer 22c, a coil conductor layer 24c, and a ground conductor layer 26, and has a loop shape.
- the capacitor C3 includes a capacitor conductor layer 22c and a ground conductor layer 26.
- the ground conductor layer 26 is a conductor layer provided on the most negative side in the z-axis direction of the LC parallel resonator LC3, and is provided on the surface of the insulator layer 16g.
- the ground conductor layer 26 has a rectangular shape and covers substantially the entire surface of the insulator layer 16g. That is, the ground conductor layer 26 of the capacitor C3 is common to the ground conductor layers 26 of the capacitors C1 and C2, and is provided on the surface of the same insulator layer 16g.
- the capacitor conductor layer 22c is a conductor layer facing the ground conductor layer 26 with the insulator layer 16f interposed therebetween, and is provided on the surface of the insulator layer 16f. As a result, a capacitance is generated between the capacitor conductor layer 22c and the ground conductor layer 26.
- the capacitor conductor layer 22c has a rectangular shape having a longitudinal direction in the y-axis direction, and is provided on the positive side in the x-axis direction from the intersection of the diagonal lines of the insulator layer 16f.
- the coil L3 includes via-hole conductors b17 to b25 and a coil conductor layer 24c.
- the via-hole conductors b17 to b20 penetrate the insulator layers 16b to 16e in the z-axis direction, respectively. Further, the end of the via-hole conductor b20 on the negative direction side in the z-axis direction is connected to the capacitor conductor layer 22c. As a result, the via-hole conductors b17 to b20 constitute one via-hole conductor that is connected to the capacitor conductor layer 22c and extends in the z-axis direction.
- the via-hole conductors b21 to b25 respectively penetrate the insulator layers 16b to 16f in the z-axis direction, and are provided on the positive side in the y-axis direction from the via-hole conductors b17 to b20. Further, the end of the via-hole conductor b25 on the negative direction side in the z-axis direction is connected to the ground conductor layer 26. Thereby, the via-hole conductors b21 to b25 constitute one via-hole conductor that is connected to the ground conductor layer 26 and extends in the z-axis direction.
- the coil conductor layer 24c is a conductor layer provided on the most positive side in the z-axis direction of the LC parallel resonator LC3, and is provided on the surface of the insulator layer 16b.
- the coil conductor layer 24c has a rectangular shape having a longitudinal direction in the y-axis direction, and is provided on the positive side in the x-axis direction from the intersection of the diagonal lines of the insulator layer 16b.
- the coil conductor layer 24c is connected to the positive end in the z-axis direction of one via-hole conductor composed of the via-hole conductors b17 to b20 and the positive z-axis direction of one via-hole conductor composed of the via-hole conductors b21 to b25.
- the end on the positive direction side in the z-axis direction of the via-hole conductor b17 is connected to the end on the negative direction side in the y-axis direction of the coil conductor layer 24c.
- the end portion on the positive direction side in the z-axis direction of the via-hole conductor b21 is connected to the end portion on the positive direction side in the y-axis direction of the coil conductor layer 24c.
- the coil L3 has a connection point between the via-hole conductor b20 and the capacitor conductor layer 22c as one end, and passes through the via-hole conductors b17 to b20, the coil conductor layer 24c, and the via-hole conductors b21 to b25, and the via-hole conductor b25 and the ground conductor. It has a U shape with the layer 26 as the other end.
- the LC parallel resonator LC3 configured as described above forms a loop surface S3 parallel to the yz plane.
- the loop surface S3 is a rectangular virtual plane formed by the LC parallel resonator LC3.
- the loop surfaces S1 to S3 of the LC parallel resonators LC1 to LC3 are parallel to the yz plane (that is, parallel to the z-axis direction and parallel to each other), and the x-axis direction (that is, the loop surfaces S1 to S3). When viewed in a plan view from the normal direction of (), at least a portion overlaps.
- the loop surface S1 and the loop surface S3 sandwich the loop surface S2.
- the coil L1 of the LC parallel resonator LC1 and the coil L2 of the LC parallel resonator LC2 are electromagnetically coupled.
- the coil L2 of the LC parallel resonator LC2 and the coil L3 of the LC parallel resonator LC3 are electromagnetically coupled.
- the coil conductor layers 24a and 24c provided on the most positive side in the z-axis direction in the LC parallel resonators LC1 and LC3 are provided on the most positive direction side in the z-axis direction in the LC parallel resonator LC2. It is provided on the surface of the insulator layer 16b provided on the positive side in the z-axis direction with respect to the coil conductor layer 24b. Therefore, the loop surfaces S1 and S3 protrude from the loop surface S2 on the positive direction side in the z-axis direction. Thereby, a part of the loop surface S1 of the LC parallel resonator LC1 and a part of the loop surface S3 of the LC parallel resonator LC3 face each other. As a result, the coil L1 and the coil L3 are electromagnetically coupled.
- the LC parallel resonators LC1 to LC3 configured as described above constitute a band pass filter.
- the lead conductor layer 20a is provided on the surface of the insulator layer 16f, is connected to the capacitor conductor layer 22a, and is drawn out to the short side of the insulator layer 16f on the negative side in the x-axis direction. . Thereby, the lead conductor layer 20a is connected to the external electrode 14a. As a result, the LC parallel resonator LC1 is electrically connected to the external electrode 14a between the capacitor C1 and the coil L1.
- the lead conductor layer 20b is provided on the surface of the insulator layer 16f, is connected to the capacitor conductor layer 22c, and is drawn out to the short side of the insulator layer 16f on the positive side in the x-axis direction. . Thereby, the lead conductor layer 20b is connected to the external electrode 14b. As a result, the LC parallel resonator LC3 is electrically connected to the external electrode 14b between the capacitor C3 and the coil L3.
- the lead conductor layer 28a is provided on the surface of the insulator layer 16g, is connected to the ground conductor layer 26, and is drawn out to the long side of the insulator layer 16g on the negative side in the y-axis direction. . Thereby, the lead conductor layer 28a is connected to the external electrode 14c. As a result, the LC parallel resonators LC1 to LC3 are electrically connected to the external electrode 14c between the capacitors C1 to C3 and the coils L1 to L3, respectively.
- the lead conductor layer 28b is provided on the surface of the insulator layer 16g, is connected to the ground conductor layer 26, and is drawn out to the long side on the positive direction side in the y-axis direction of the insulator layer 16g. . Thereby, the lead conductor layer 28b is connected to the external electrode 14d. As a result, the LC parallel resonators LC1 to LC3 are electrically connected to the external electrode 14d between the capacitors C1 to C3 and the coils L1 to L3, respectively.
- the high-frequency signal Sig1 having a positive voltage input from the external electrode 14a flows clockwise when viewed from the positive side in the x-axis direction.
- the coil L1 and the coil L2 are electromagnetically coupled. Therefore, when the high-frequency signal Sig1 flows in the clockwise direction in the LC parallel resonator LC1 when viewed in plan from the positive direction side in the x-axis direction, the high-frequency signal Sig2 is planarized from the positive direction side in the x-axis direction by electromagnetic induction. When viewed, it flows counterclockwise in the LC parallel resonator LC2.
- the coil L2 and the coil L3 are electromagnetically coupled. Therefore, when the high-frequency signal Sig2 flows counterclockwise in the LC parallel resonator LC2 when viewed in plan from the positive direction side in the x-axis direction, the high-frequency signal Sig3 is generated from the positive direction side in the x-axis direction by electromagnetic induction. When viewed in a plan view, it flows clockwise in the LC parallel resonator LC3. Thereby, the high frequency signal Sig3 is output from the external electrode 14b. Since the coil L1 and the coil L3 are also electromagnetically coupled to each other, the power of the high-frequency signals Sig1 and Sig3 is also affected by this.
- the LC parallel resonators LC1 to LC3 have specific resonance frequencies determined by the coils L1 to L3 and the capacitors C1 to C3, respectively.
- the impedances of the LC parallel resonators LC1 to LC3 are high at these resonance frequencies. Thereby, a high frequency signal Sig3 in a predetermined frequency band determined by these resonance frequencies is output from the external electrode 14b.
- a ceramic green sheet to be the insulator layer 16 is prepared.
- via-hole conductors b1 to b25 are formed in the ceramic green sheets to be the insulator layers 16b to 16f, respectively.
- via holes are formed by irradiating the ceramic green sheets to be the insulator layers 16b to 16f with a laser beam.
- the via hole is filled with a conductive paste such as Ag, Pd, Cu, Au or an alloy thereof by a method such as printing.
- a conductive paste mainly composed of Ag, Pd, Cu, Au, or an alloy thereof is screen-printed or photolithographyed on the ceramic green sheets to be the insulator layers 16b, 16c, 16f, and 16g.
- the lead conductor layers 20a and 20b, the capacitor conductor layers 22a and 22b, the coil conductor layers 24a to 24c, the ground conductor layer 26, and the lead conductor layers 28a and 28b are formed.
- the via holes may be filled with a conductive paste.
- each ceramic green sheet is laminated. Specifically, a ceramic green sheet to be the insulator layer 16g is disposed. Next, the ceramic green sheet to be the insulator layer 16f is disposed on the ceramic green sheet to be the insulator layer 16g. Thereafter, the ceramic green sheet to be the insulator layer 16f is pressure-bonded to the ceramic green sheet to be the insulator layer 16g. Thereafter, the ceramic green sheets to be 16e, 16d, 16c, 16b, and 16a are similarly laminated and pressure-bonded in this order.
- a mother laminated body is formed by the above process. The mother laminate is subjected to main pressure bonding by a hydrostatic pressure press or the like.
- the mother laminated body is cut into a laminated body 12 having a predetermined size with a cutting blade.
- the unfired laminate 12 is subjected to binder removal processing and firing.
- the fired laminated body 12 is obtained through the above steps.
- the laminated body 12 is subjected to barrel processing to be chamfered. Thereafter, an electrode paste whose main component is silver is applied and baked on the surface of the laminate 12 by, for example, a dipping method or the like, thereby forming a silver electrode to be the external electrode 14.
- the external electrode 14 is formed by performing Ni plating / Sn plating on the surface of the silver electrode.
- the degree of coupling between the coils L1 to L3 of the LC parallel resonators LC1 to LC3 can be adjusted without increasing the size of the element.
- an electronic component having a band pass filter composed of a plurality of LC parallel resonators there is a case where it is desired to reduce the degree of coupling between the coils of the LC parallel resonators in order to obtain desired characteristics.
- the multilayer bandpass filter described in Patent Document 1 as a method of reducing the degree of coupling between coils of adjacent LC parallel resonators, increasing the distance between the LC parallel resonators can be raised.
- the distance between the LC parallel resonators is increased, there is a problem that the multilayer bandpass filter is increased in size.
- the loop surface S1 of the LC parallel resonator LC1 protrudes from the loop surface S2 of the LC parallel resonator LC2 to the positive direction side in the z-axis direction. That is, in the electronic component 10, by reducing the height of the LC parallel resonator LC2 in the z-axis direction, the loop surface S1 of the LC parallel resonator LC1 and the loop surface S2 of the LC parallel resonator LC2 face each other. The area is reduced.
- the degree of coupling between the LC parallel resonator LC1 and the LC parallel resonator LC2 in the electronic component 10 is such that the height of the loop surface S2 of the LC parallel resonator LC2 is equal to the height of the loop surface S1 of the LC parallel resonator LC1.
- the degree of coupling between the LC parallel resonator LC1 and the LC parallel resonator LC2 in the electronic component is smaller.
- the coupling degree of the LC parallel resonators LC1 to LC3 can be lowered without increasing the size of the element.
- the conductor layers (coil conductor layers 24a and 24c) provided on the most positive side in the z-axis direction of the LC parallel resonators LC1 and LC3 are arranged in the z-axis direction of the LC parallel resonator LC2. It is provided on the surface of the insulator layer 16b provided on the positive direction side in the z-axis direction from the conductor layer (coil conductor layer 24b) provided on the most positive direction side.
- the loop surfaces S1 and S3 of the LC parallel resonators LC1 and LC3 protrude from the loop surface S2 of the LC parallel resonator LC2 to the positive side in the z-axis direction and face each other.
- the coupling degree between the coils L1 and L3 in the electronic component 10 is higher than the coupling degree between the coils L1 and L3 in the electronic component in which the loop surfaces S1 and S3 do not protrude from the loop surface S2. In this way, by coupling the coils L1 and L3 that are not adjacent to each other with a high degree of coupling, the characteristics of the electronic component 10 can be adjusted to desired characteristics as will be described later.
- the ground conductor layer 26 is used as a ground conductor layer of the capacitors C1 to C3. Therefore, it is not necessary to provide the ground conductor layer 26 in each of the capacitors C1 to C3.
- the ground conductor layer 26 is provided on the most negative direction side in the z-axis direction of the LC parallel resonators LC1 to LC3. Thereby, a via-hole conductor is not provided in the insulator layer 16g provided with the ground conductor layer 26. Therefore, the ground conductor layer 26 does not need to have a shape that avoids the via-hole conductor, and can cover substantially the entire surface of the insulator layer 16g. As a result, it is possible to prevent noise from leaking from the electronic component 10 or from entering the electronic component 10 from the outside.
- the electronic component 10 is not limited to the electronic component 10 shown in the above embodiment, and can be changed within the scope of the gist thereof.
- the electronic component 10 includes the LC parallel resonators LC1 to LC3.
- the number of LC parallel resonators incorporated in the electronic component 10 is not limited to this.
- 4A to 4H are cross-sectional structural views of the electronic component 10a according to the first modification example and the electronic component 10h according to the eighth modification example, respectively.
- the electronic components 10a to 10h include LC parallel resonators LC1 to LC5.
- the LC parallel resonators LC1 and LC5 protrude beyond the LC parallel resonators LC2 to LC4 toward the positive direction in the z-axis direction.
- the coil L1 of the LC parallel resonator LC1 and the coil L5 of the LC parallel resonator LC5 are electromagnetically coupled.
- the LC parallel resonators LC1 and LC5 protrude beyond the LC parallel resonators LC2 to LC4 toward the positive and negative directions in the z-axis direction.
- the coil L1 of the LC parallel resonator LC1 and the coil L5 of the LC parallel resonator LC5 are electromagnetically coupled.
- the coils L1 and L5 of the two LC parallel resonators LC1 and LC5 sandwiching the three LC parallel resonators LC2 to LC4 may be electromagnetically coupled.
- the LC parallel resonators LC1, LC3, and LC5 protrude beyond the LC parallel resonators LC2 and LC4 on the positive side in the z-axis direction.
- the coil L1 of the LC parallel resonator LC1 and the coil L3 of the LC parallel resonator LC3 are electromagnetically coupled.
- the LC parallel resonator LC3 and the LC parallel resonator LC5 are electromagnetically coupled.
- the coils L1, L3, and L5 of the LC parallel resonators LC1, LC3, and LC5 are more positive and negative in the z-axis direction than the coils L2 and L4 of the LC parallel resonators LC2 and LC4. It sticks out.
- the coil L1 of the LC parallel resonator LC1 and the coil L3 of the LC parallel resonator LC3 are electromagnetically coupled.
- the coil L3 of the LC parallel resonator LC3 and the coil L5 of the LC parallel resonator LC5 are electromagnetically coupled.
- the coils L1, L3, L5 of the three LC parallel resonators LC1, LC3, LC5 may be electromagnetically coupled.
- the LC parallel resonators LC2 and LC4 protrude beyond the LC parallel resonators LC1, LC3, and LC5 in the positive z-axis direction.
- the coil L2 of the LC parallel resonator LC2 and the coil L4 of the LC parallel resonator LC4 are electromagnetically coupled.
- the LC parallel resonators LC2 and LC4 protrude beyond the LC parallel resonators LC1, LC3, and LC5 toward the positive and negative directions in the z-axis direction.
- the coil L2 of the LC parallel resonator LC2 and the coil L4 of the LC parallel resonator LC4 are electromagnetically coupled.
- the coils L2 and L4 of the two LC parallel resonators LC2 and LC4 positioned in the even-numbered stages may be electromagnetically coupled.
- the LC parallel resonators LC1, LC2, LC4, and LC5 protrude beyond the LC parallel resonator LC3 toward the positive direction side in the z-axis direction.
- the coil L2 of the LC parallel resonator LC2 and the coil L4 of the LC parallel resonator LC4 are electromagnetically coupled.
- the LC parallel resonators LC1, LC2, LC4, and LC5 protrude beyond the LC parallel resonator LC3 toward the positive direction side and the negative direction side in the z-axis direction.
- the coil L2 of the LC parallel resonator LC2 and the coil L4 of the LC parallel resonator LC4 are electromagnetically coupled.
- the LC parallel resonator LC3 among the LC parallel resonators LC1 to LC5 may be configured to be short, so that the coils L2 and L4 of the LC parallel resonators LC2 and LC4 may be electromagnetically coupled.
- the electronic components 10, 10a to 10h are assumed to include three or five LC parallel resonators.
- the number of LC parallel resonators is not limited to this and may be plural.
- a first model the high-frequency signal passing characteristics of an electronic component 10 (hereinafter referred to as a first model) in which the LC parallel resonator LC1 and the LC parallel resonator LC3 are protruded from the LC parallel resonator LC2 were examined.
- a first model the high-frequency signal passing characteristics of an electronic component 10 (hereinafter referred to as a first model) in which the LC parallel resonator LC1 and the LC parallel resonator LC3 are protruded from the LC parallel resonator LC2 were examined.
- . 5 and 6 are graphs showing the first simulation result.
- the vertical axis represents the attenuation, and the horizontal axis represents the frequency.
- an attenuation pole is formed on the high frequency side or low frequency side of the pass band of the high frequency signal.
- the attenuation pole is formed at the high frequency end of the high frequency signal pass band.
- the position of the attenuation pole can be adjusted by adjusting the degree of coupling between the LC parallel resonators LC1 and LC3.
- FIG. 7 is a graph showing the second simulation result.
- the vertical axis represents the attenuation, and the horizontal axis represents the frequency.
- Attenuation poles are formed on both the high frequency side and the low frequency side of the pass band of the high frequency signal.
- the attenuation pole may not be formed. In this case, the attenuation amount in the region higher and lower than the pass band of the electronic component 10 is reduced.
- FIG. 8 is a graph showing a third simulation result.
- the vertical axis represents the attenuation, and the horizontal axis represents the frequency.
- the fourth model has a smaller attenuation pole depth than the third model. This is probably because the degree of coupling between the LC parallel resonators is lower in the third model than in the fourth model.
- FIG. 9 is a graph showing a fourth simulation result.
- the vertical axis represents the attenuation, and the horizontal axis represents the frequency.
- two attenuation poles are formed by coupling LC parallel resonators at two locations.
- the two attenuation poles are formed on both the high-frequency side and low-frequency side of the high-frequency signal pass band, or on the high-frequency side or low-frequency side of the high-frequency signal pass band, depending on the characteristics of the LC parallel resonators LC1 to LC6. Or formed on either side.
- FIG. 10 is a graph showing the fifth simulation result.
- the vertical axis represents the attenuation, and the horizontal axis represents the frequency.
- two attenuation poles are formed on each of the high frequency side of the pass band and the low frequency side of the pass band.
- the present invention is useful for electronic components, and is particularly excellent in that the degree of coupling of the LC parallel resonator can be adjusted without increasing the size of the element.
- C1 to C3 Capacitors L1 to L3 Coils LC1 to LC6 LC parallel resonators S1 to S3 Loop surface b1 to b25 Via hole conductors 10, 10a to 10h Electronic parts 12 Laminated bodies 14a to 14d External electrodes 16a to 16g Insulator layers 20a, 20b, 28a, 28b Lead conductor layer 22a to 22c Capacitor conductor layer 24a to 24c Coil conductor layer 26 Ground conductor layer
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Abstract
Description
以下に、本発明の一実施形態に係る電子部品の構成について図面を参照しながら説明する。図1は、本発明の実施形態に係る電子部品10の外観斜視図である。図2は、電子部品10の積層体12の分解斜視図である。図3は、電子部品10の等価回路図である。図1及び図2において、z軸方向は、積層方向を示す。また、x軸方向は、電子部品の長辺に沿った方向を示し、y軸方向は、電子部品10の短辺に沿った方向を示す。
次に、電子部品10の製造方法について図1及び図2を参照しながら説明する。
以上のように構成された電子部品10によれば、素子を大型化することなく、LC並列共振器LC1~LC3のコイルL1~L3間の結合度を調整することができる。例えば、複数のLC並列共振器からなる帯域通過フィルタを備えている電子部品では、所望の特性を得るためにLC並列共振器のコイル間の結合度を低くしたい場合がある。特許文献1に記載の積層帯域通過フィルタにおいて、隣接するLC並列共振器のコイル間の結合度を下げる方法としては、LC並列共振器間の距離を大きくすることが上げられる。しかしながら、LC並列共振器間の距離を大きくすると、積層帯域通過フィルタが大型化してしまうという問題がある。
なお、電子部品10は、前記実施形態に示した電子部品10に限らず、その要旨の範囲において変更可能である。
以下に、隣り合わないLC並列共振器の結合について図面を参照しながら説明する。本願発明者は、隣り合わないLC並列共振器同士を対向させて結合させることによる電子部品10の特性の変化を調べるために、以下のコンピュータシミュレーションを行った。具体的には、6つのLC並列共振器LC1~LC6を有する電子部品10において、対向させるLC並列共振器同士を変化させて、高周波信号の通過特性の変化を調べた。
L1~L3 コイル
LC1~LC6 LC並列共振器
S1~S3 ループ面
b1~b25 ビアホール導体
10,10a~10h 電子部品
12 積層体
14a~14d 外部電極
16a~16g 絶縁体層
20a,20b,28a,28b 引き出し導体層
22a~22c コンデンサ導体層
24a~24c コイル導体層
26 グランド導体層
Claims (5)
- 複数の絶縁体層が積層されることにより構成されている積層体と、
積層方向に延在するビアホール導体、及び、前記絶縁体層上に設けられている導体層からなるループ状の第1のLC並列共振器及び第2のLC並列共振器であって、帯域通過フィルタを構成している第1のLC並列共振器及び第2のLC並列共振器と、
を備えており、
前記第1のLC並列共振器の第1のループ面と前記第2のLC並列共振器の第2のループ面とは、積層方向に平行であって、かつ、互いに平行であると共に、該第1のループ面の法線方向から平面視したときに、少なくとも一部において互いに重なっており、
前記第1のループ面は、積層方向の上側及び/又は下側に前記第2のループ面からはみ出していること、
を特徴とする電子部品。 - 前記電子部品は、
積層方向に延在するビアホール導体、及び、前記絶縁体層上に設けられている導体層からなるループ状の第3のLC並列共振器であって、前記第1のLC並列共振器及び前記第2の並列共振器と共に帯域通過フィルタを構成している第3のLC並列共振器を、
更に備えており、
前記第1のループ面と前記第2のループ面と前記第3のLC並列共振器の第3のループ面とは、積層方向に平行であって、かつ、互いに平行であると共に、該第1のループ面の法線方向から平面視したときに、少なくとも一部において互いに重なっており、
前記第1のループ面と前記第3のループ面とは、前記第2のループ面を挟んでいること、
を特徴とする請求項1に記載の電子部品。 - 前記第1のLC並列共振器の積層方向の最も上側に設けられている前記導体層、及び、前記第3のLC並列共振器の積層方向の最も上側に設けられている前記導体層は、前記第2のLC並列共振器の積層方向の最も上側に設けられている前記絶縁体層よりも積層方向の上側に設けられている前記絶縁体層上に設けられていること、
を特徴とする請求項2に記載の電子部品。 - 前記第1のLC並列共振器の積層方向の最も下側に設けられている前記導体層、前記第2のLC並列共振器の積層方向の最も下側に設けられている前記導体層、及び、前記第3のLC並列共振器の積層方向の最も下側に設けられている前記導体層は、同じ前記絶縁体層上に設けられていること、
を特徴とする請求項2又は請求項3のいずれかに記載の電子部品。 - 前記第1のLC並列共振器は、コイル及びコンデンサを含んでおり、
前記コンデンサは、
前記第1のLC並列共振器の積層方向の最も下側に設けられている前記導体層により構成されているグランド導体層と、
前記絶縁体層を介して前記グランド導体層に対向している前記導体層により構成されているコンデンサ導体層と、
を含んでおり、
前記コイルは、
前記コンデンサ導体に接続され、かつ、積層方向に延在している前記ビアホール導体により構成されている第1のコイルビアホール導体と、
前記グランド導体層に接続され、かつ、積層方向に延在している前記ビアホール導体により構成されている第2のコイルビアホール導体と、
前記第1のコイルビアホール導体の積層方向の上側の端部と前記第2のコイルビアホール導体の積層方向の上側の端部とに接続されている前記導体層により構成されているコイル導体層と、
を含んでいること、
を特徴とする請求項1ないし請求項4のいずれかに記載の電子部品。
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