WO2019107984A1 - Filtre empilé - Google Patents

Filtre empilé Download PDF

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Publication number
WO2019107984A1
WO2019107984A1 PCT/KR2018/014986 KR2018014986W WO2019107984A1 WO 2019107984 A1 WO2019107984 A1 WO 2019107984A1 KR 2018014986 W KR2018014986 W KR 2018014986W WO 2019107984 A1 WO2019107984 A1 WO 2019107984A1
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WIPO (PCT)
Prior art keywords
noise
pattern
coil
bridge
coil pattern
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Application number
PCT/KR2018/014986
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English (en)
Korean (ko)
Inventor
이명호
Original Assignee
주식회사 모다이노칩
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020180131914A external-priority patent/KR102122026B1/ko
Application filed by 주식회사 모다이노칩 filed Critical 주식회사 모다이노칩
Priority to CN201880005290.5A priority Critical patent/CN110114847A/zh
Publication of WO2019107984A1 publication Critical patent/WO2019107984A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/33—Arrangements for noise damping

Definitions

  • the present invention relates to a stacked filter, and more particularly to a stacked filter capable of suppressing noise in two or more frequency bands.
  • a plurality of stacked type filters are used.
  • a capacitor, a chip bead, a common mode filter, or the like that removes noise in different frequency bands are used.
  • the common mode filter has a structure in which two choke coils are combined into one, can pass the signal current of the differential mode, and can remove only the common mode noise current. That is, the common mode filter can classify and remove the signal current of the differential mode and the noise current of the common mode, which are alternating currents.
  • the conventional noise filter removes only the noise of one frequency and does not remove the other noise. Therefore, the quality of any one function is inevitably lowered by noise.
  • the present invention provides a stacked filter in which two or more noise filters are provided in one stack.
  • the present invention provides a stacked filter capable of suppressing noise of two or more frequencies.
  • a laminated filter includes: a laminate in which a plurality of sheets are laminated; At least two noise filters provided in the laminate and each having a plurality of coil patterns; A bridge pattern connecting at least a part of said at least two noise filters to each other; And an external electrode provided outside the laminate and connected to the at least two noise filters.
  • the at least two noise filters each include at least two coil patterns provided in the stacking direction of the sheets.
  • the plurality of coil patterns are connected through a vertical connection wiring to form one noise filter.
  • At least one of the number of revolutions and the length of the coil pattern of each of the two or more noise filters is different.
  • At least one of the plurality of coil patterns constituting the same noise filter is different from at least one of the number of revolutions, the length, the linewidth and the interval.
  • the bridge pattern connects the coil patterns provided on the same plane.
  • the bridge pattern is provided in two or more in the lamination direction of the sheet.
  • Two or more of the bridge patterns spaced apart in the vertical direction are at least partially overlapped, or at least a part of the width is formed differently.
  • the two or more noise filters have different impedance and frequency characteristics.
  • the impedance and the frequency characteristics are finely adjusted according to the length of the bridge pattern, the distance between the bridge pattern and the noise filter, and whether or not two or more bridge patterns overlap each other.
  • At least one of an overvoltage protector and a capacitor provided in the laminate At least one of an overvoltage protector and a capacitor provided in the laminate.
  • two or more noise filters are provided in one stack and two or more noise filters are connected by a bridge pattern.
  • the multi-layered filter according to the present invention can remove noise of two or more frequencies, more than two noise filters can realize a deep insertion loss characteristic in a desired frequency band, and can realize a wide band width. Therefore, it is possible to remove noise of various frequencies, thereby improving the noise canceling characteristic.
  • the two or more noise filters may be formed with different numbers of revolutions of the coil pattern, respectively, and thus may have two or more impedance characteristics.
  • the impedance and frequency characteristics can be finely adjusted according to the length of the bridge pattern, the distance between the bridge pattern and the noise filter, and whether or not two or more bridge patterns overlap each other.
  • 1 and 2 are an assembled perspective view and an exploded perspective view of a stacked filter according to an embodiment of the present invention
  • FIGS. 3 and 4 are cross-sectional views taken along lines A-A 'and B-B' of FIG. 1;
  • FIG. 5 is a graph of a frequency characteristic of a stacked filter according to an embodiment of the present invention.
  • 6 to 8 are graphs of frequency characteristics according to modifications of the stacked filter according to an embodiment of the present invention.
  • 9-11 are an exploded perspective view and a cross-sectional view of a stacked filter according to another embodiment of the present invention.
  • 12 and 13 are an assembled perspective view and an exploded perspective view of a stacked filter according to another embodiment of the present invention.
  • Figures 14 and 15 are schematic diagrams of embodiments of the present invention in accordance with various shape changes of a bridge pattern.
  • 16 and 17 are graphs of frequency characteristics and impedance characteristics according to various shape changes of the bridged pattern.
  • FIG. 1 is an exploded perspective view of a multilayer filter according to an embodiment of the present invention
  • FIGS. 3 and 4 are sectional views taken along lines A-A 'and B-B' of FIG.
  • FIGS. 3 and 4 show the vertical connection relationship, and the coil pattern and the like are shown as straight lines for convenience.
  • a multilayer filter according to an embodiment of the present invention includes a laminate 1000 in which a plurality of sheets 100 are laminated, at least one coil pattern 200 in the laminate 1000, And at least two noise filters (2100, 2200;
  • the external electrodes 3100, 3200 and 3000 may be formed on two opposite sides of the layered structure 1000 and connected to two or more noise filters 2000.
  • the noise filter 2000 may include a common mode noise filter.
  • the noise filter 2000 includes two or more coil patterns 200 spaced in the vertical direction, i.e., in the stacking direction of the sheet 100, and two or more noise filters 2000 are spaced apart in the horizontal direction by a predetermined distance .
  • two or more vertically spaced coil patterns 200 constitute first and second noise filters 2100 and 2200, and coil patterns 200 and 2200 constituting first and second noise filters 2100 and 2200, respectively.
  • the coil patterns 200 spaced horizontally on the same sheet among the coil patterns 200 of the first and second noise filters 2100 and 200 may be connected by a bridge pattern 500.
  • the first and second noise filters 2100 and 2200 may have different numbers of revolutions of the coil pattern 200, and thus may have different impedances and frequencies.
  • the noise filter 2000 including the coil pattern 200 having a small number of revolutions has a small impedance and can block high-frequency noise
  • the noise filter 2000 including the coil pattern 2000 having a large number of revolutions has an impedance of It can block large and low frequency noise.
  • the stacked body 1000 may be provided in a substantially hexahedral shape. That is, the stacked body 1000 has a predetermined length and width in one direction and the other direction (for example, the X direction and the Y direction) perpendicular to each other in the horizontal direction, As shown in Fig.
  • the length in the X direction may be equal to or different from the width in the Y direction
  • the width in the Y direction may be equal to or different from the height in the Z direction.
  • the ratio of length, width and height may be from 1: 3: 1: 0.5 to 2. That is, the length may be one to three times greater than the width based on the width, and the height may be 0.5 to 1 times the width.
  • the length, the width, and the height may be different from each other, and at least one may be the same.
  • the length can be 1.5 times the width
  • the height can be 0.7 times the length.
  • the size in the X, Y, and Z directions can be variously changed according to, for example, the internal structure of the electronic device to which the stacked device is connected, the shape of the stacked device, and the like.
  • the stacked body 1000 may be formed by stacking a plurality of sheets 110 to 190 (100). At least one coil pattern 200 is formed on the sheet 100 so that at least two noise filters 2000 are provided in the laminated body 1000.
  • the plurality of sheets 100 constituting the laminated body 1000 may be formed to a thickness of, for example, 1 m to 4000 m and a thickness of 3000 m or less. That is, the thickness of each of the sheets 100 may be 1 ⁇ to 4000 ⁇ according to the thickness of the laminate 1000, and may be, for example, 1 ⁇ to 300 ⁇ . However, the thickness of the sheet 100, the number of layers and the like can be adjusted according to the size of the stacked filter.
  • the sheet can be formed thin if it is applied to a device having a small thickness or a small size, and if the device is applied to a device having a large thickness or a large size, the sheet can be formed thick.
  • the sheets 110 to 190 are formed to have a predetermined thickness and have a predetermined ratio in length and width in one direction and in the other direction orthogonal thereto.
  • the length in the X direction and the width in the Y direction may be provided in a ratio of 1 to 3: 1. That is, the sheet 100 may have a length greater than the width.
  • at least one of the sheets 100 may have a thickness different from that of the other sheets. Also, at least some regions of the same sheet 100 may have different thicknesses than the other regions.
  • the uppermost and lowermost sheets of the laminate 1000 may be an upper cover layer and a lower cover layer, respectively.
  • the first and ninth sheets 110 and 190 may be thicker than the second to eighth sheets 120 to 180 provided inside thereof and the thicknesses of the second to eighth sheets 120 to 180 Or less than the sum of.
  • the first and ninth sheets 110 and 190 may be made of a material different from the second to eighth sheets 120 to 180 provided therebetween.
  • the first and ninth sheets 110 and 190 may be formed of a magnetic material
  • the second to eighth sheets 120 to 180 may be formed of a non-magnetic material.
  • the first and ninth sheets 110 and 190 may be formed by laminating a plurality of magnetic sheets, respectively, and the second to eighth sheets 120 to 180 may be formed by at least one non-magnetic sheet .
  • the magnetic substance sheet can be formed using, for example, NiZnCu or NiZn magnetic ceramic.
  • NiZnCu based magnetic material sheet is Fe 2 O 3, ZnO, NiO , there CuO may be formed of a mixture of, Fe 2 O 3, ZnO, NiO and CuO is for example 5: 1 ratio: 2: 2 ≪ / RTI >
  • the non-magnetic sheet can be manufactured using, for example, a low temperature co-fired ceramic (LTCC).
  • LTCC low temperature co-fired ceramic
  • the LTCC material may comprise Al 2 O 3 , SiO 2 , a glass material.
  • the nonmagnetic layers that is, the second to eighth sheets 120 to 180, may include at least a part of the magnetic material. That is, the magnetic material may be included in at least a part of the non-magnetic sheet constituting the second to eighth sheets 120 to 180.
  • a noise filter 2000 is provided between the upper and lower cover layers, i.e., the first and ninth sheets 110, 190.
  • the noise filter 2000 may include a plurality of coil patterns selectively formed in the plurality of sheets 120 to 180, a vertical connection wiring, an extraction electrode, and a bridge pattern. That is, at least one coil pattern is selectively formed on the upper portion of the plurality of sheets 130 to 180, and two or more coil patterns in the stacking direction of the sheets, i.e., in the vertical direction, Lt; / RTI > Accordingly, a plurality of coil patterns connected in the vertical direction form one noise filter 2000, and thereby at least two or more noise filters 2100 and 2200 are formed in the horizontal direction. That is, at least two noise filters 2000 are provided in one stacked filter. In this embodiment, two noise filters 2100 and 2200 are formed.
  • a conductive layer such as a coil pattern is not formed on the second sheet 120 provided below the first sheet 110.
  • a hole 310 in which at least one coil pattern 210 and at least one conductive material are embedded is formed on the third sheet 130 and at least one coil pattern 220 and at least two coil patterns 220 are formed on the fourth sheet 140.
  • [ Holes 321 and 322 filled with the conductive material are formed.
  • On the fifth sheet 150 at least two coil patterns 231 and 232 and holes 331 and 332 filled with at least two conductive materials are formed.
  • On the sixth sheet 160 at least two coil patterns 241 and 242 and holes 341 and 342 filled with at least two conductive materials are formed.
  • At least one coil pattern 250 and at least one conductive material-embedded hole 350 are formed on the seventh sheet 170 and at least one coil pattern 260 is formed on the eighth sheet 180 .
  • the coil patterns 200 formed in the same area in the vertical direction can be formed in a superimposed manner. That is, the first coil pattern 210, the second coil pattern 220, the third coil pattern 231, and the fourth coil pattern 241 are formed in an overlapping manner.
  • the third-second coil pattern 232, the fourth-coil pattern 242, the fifth coil pattern 250, and the sixth coil pattern 260 are formed to overlap each other.
  • the third -1 coil pattern 231 and the third -2 coil pattern 232 formed on the fifth sheet 150 are spaced apart from each other by a predetermined distance
  • the fourth 4- 1 coil pattern 241 and the 4-2 coil pattern 242 are spaced apart from each other by a predetermined distance.
  • the coil pattern 200 may be formed in a spiral shape that rotates in one direction.
  • the first and second coil patterns 210 and 220 may be formed by rotating counterclockwise, and the third and fourth coil patterns 231 and 241 may be rotated clockwise .
  • the third and fourth coil patterns 232 and 242 may be formed by rotating clockwise and the fifth and sixth coil patterns 250 and 260 may be formed by rotating counterclockwise . That is, at least one of the plurality of coil patterns 200 forming the same noise filter 2100 and 2200 may be formed by rotating in the opposite direction.
  • the coil pattern 200 may have the same line width and spacing. However, the coil pattern 200 may have a larger interval than the line width.
  • the coil patterns 200 forming the same noise filters 2100 and 2200 may be formed with the same line width, interval, and length. However, at least one coil pattern 200 may be formed with at least one of different line width, spacing, and length. In addition, at least one of the line width, the gap, and the thickness of at least a part of one coil pattern 200 may be different from the other area.
  • the first coil pattern 210 may have a line width of at least one region different from that of the other region, the spacing of at least one region may be different from that of the other region, and the thickness of at least one region may be different .
  • the vertical connection wirings 300a, 300b, 300c, and 300d may be formed on the sheet to connect at least two coil patterns 200 formed in the vertical direction.
  • the vertical connection wirings 300a, 300b, 300c, and 300d may be formed by forming through holes having a predetermined size in a predetermined region of the sheet 100 and filling the holes with a conductive material. That is, holes 300 in which at least two conductive materials formed in the vertical direction are buried are connected to form vertical connection wirings 300a, 300b, 300c, and 300d.
  • the hole 310 in which the first conductive material is buried and the hole 321 in which the second-1 conductive material is buried are connected to form the first vertical connection wiring 300a, and the second-2 conductive material
  • the buried hole 322 and the hole 331 in which the 3-1 conductive material is buried are connected to each other to form the second vertical connection wiring 300b.
  • the hole 332 in which the 3-2 conductive material is embedded and the hole 341 in which the 4-1 conductive material is embedded are connected to form the third vertical connection wiring 300c and the 4-2 conductive material is buried
  • Hole 342 and the hole 350 filled with the fifth conductive material are connected to each other to form a fourth vertical connection line 300d.
  • the hole 300 in which the conductive material is embedded may be formed on the inner side of the coil pattern 200 and the hole 300 in which at least some conductive material is embedded may be formed to overlap with the inner starting point of the coil pattern 200 .
  • Out electrodes 410, 420, 430, 440, and 400 are formed. That is, the first lead-out electrode 410 connected to the coil pattern 210 and drawn out to the outside is formed on the third sheet 130, and the coiled pattern 220 is connected to the fourth sheet 140, The second outgoing electrode 420 is formed.
  • a third lead electrode 430 connected to the coil pattern 250 is formed on the seventh sheet 170 and a third lead electrode 430 connected to the coil pattern 260 is connected to the eighth sheet 180, 4 lead-out electrode 440 are formed.
  • the extraction electrodes 410 to 440 are connected to the external electrode (3000). That is, the first and second lead electrodes 410 and 420 drawn in the first direction are connected to the 1-1 and 2-1 external electrodes 3110 and 3210, respectively, 3 and the fourth lead electrodes 430 and 440 are connected to the first and second outer electrodes 3120 and 3220, respectively.
  • the first and second lead electrodes 410 and 420 are drawn out in one direction and the third and fourth lead electrodes 430 and 440 are drawn out in the other direction opposite to one direction.
  • the extraction electrodes 400 drawn out in the same direction are spaced apart from each other.
  • the bridge pattern 500 may be formed between the coil patterns formed on the same sheet.
  • a first bridge pattern 510 is formed between the third and fourth coil patterns 231 and 232 formed on the fifth sheet 150 and the first bridge pattern 510 is formed between the third and fourth coil patterns 231 and 232
  • the second bridge pattern 520 may be formed between the first to fourth coil patterns 411 and 412 and the fourth to fourth coil patterns 241 and 242.
  • the coil patterns formed on the same plane by the bridge pattern 500 can be connected to each other. That is, the 3-1 and 3-2 coil patterns 231 and 232 are connected by the first bridge pattern 510 and the 4-1 and 4-2 coils are connected by the second bridge pattern 520, Patterns 241 and 242 are connected.
  • the first and second bridge patterns 510 and 520 spaced apart in the vertical direction may be formed to overlap each other, and may have the same width and length.
  • the bridge patterns 510 and 520 may be formed so that at least a part thereof does not overlap, and at least one of the width and the length may be formed differently.
  • the frequency characteristics and the impedance characteristics of the multilayer filter can be finely adjusted by the bridge patterns 510 and 520.
  • the insertion loss and the impedance characteristic according to the frequency can be adjusted by 0.1% to 5% depending on the shape of the bridge patterns 510 and 520.
  • the frequency characteristic can be adjusted to about 200 MHz according to the shape of the bridge patterns 510 and 520.
  • the bridge pattern 500 connects the coil patterns 200 of the first and second noise filters 2100 and 2200 so that the output of the first noise filter 2100 and the output of the second noise filter 2200 Lt; / RTI >
  • the signal input through the 1-1 external electrode 3110 may include a first coil pattern 310, a 3-1 coil pattern 331, a first bridge pattern 510, Pattern 332 and the fifth coil pattern 350 to the first and second external electrodes 3120.
  • the signal inputted through the 2-1 external electrode 3210 is applied to the second coil pattern 320, the 4-1 coil pattern 321, the second bridge pattern 520, the 4-2 coil pattern 322 and the sixth coil pattern 360 to the second -2 outer electrode 3220. That is, a signal inputted through one external electrode 3000 can be transmitted to the other external electrode 3000 through the first noise filter 2100 and the second noise filter 2200.
  • the first coil pattern 210 is connected to the third coil pattern 231 through the vertical connection wirings 310 and 321, and the second coil pattern 220 is connected to the vertical connection wirings
  • the first noise filter 2100 is connected to the 4-1 coil pattern 241 via the first and second coil patterns 322 and 331.
  • the third-second coil pattern 232 is connected to the fifth coil pattern 250 through the vertical connection wirings 332 and 341 and the fourth-second coil pattern 242 is connected to the vertical connection wirings 342 and 350
  • a second noise filter (3200). That is, a plurality of coil patterns formed at the same position in the vertical direction form one noise filter. Further, neighboring coil patterns of the coil patterns constituting the different noise filters are connected by the bridge pattern 500.
  • the coil patterns constituting the same noise filter can be formed at the same number of revolutions. That is, the first coil pattern 210, the second coil pattern 220, the third coil pattern 311, and the fourth coil pattern 411 forming the first noise filter 2100 form the same number of revolutions As shown in FIG.
  • the third to eighth coil patterns 312, the fourth to eighth coil patterns 412, the fifth coil patterns 250 and the sixth coil patterns 260 forming the second noise filter 2200 have the same number of revolutions As shown in FIG.
  • at least one of the coil patterns constituting the same noise filter may be formed at a different number of revolutions.
  • At least one of the coil patterns 200 constituting the first noise filter 2100 may have a different number of revolutions, and at least one of the coil patterns 200 forming the second noise filter 2200 may have a different number of revolutions Can be formed differently.
  • the coil patterns constituting the different noise filters may be formed at different rotational speeds. That is, the coil pattern 200 constituting the first noise filter 2100 and the coil pattern 200 constituting the second noise filter 2200 may be formed at different rotational speeds.
  • the number of revolutions of the coil pattern constituting the first noise filter 2100 may be greater than the number of revolutions of the coil pattern constituting the second noise filter 2200.
  • the ratio of the number of revolutions of the coil pattern constituting the first and second noise filters 2100 and 2200 may be 1.5: 1 to 10: 1. That is, the number of revolutions of the coil pattern constituting the first noise filter 2100 may be 1.5 to 10 times larger than the number of revolutions of the coil pattern constituting the second noise filter 2200.
  • One stacked filter may have at least two impedance characteristics as the number of revolutions of the coil pattern 200 constituting the first and second noise filters 2100 and 2200 are different from each other.
  • the lead electrode 400 and the bridge pattern 500 may be different from the regions having different widths of at least one region and may be different from regions having different thicknesses of at least one region.
  • the first extraction electrode 400 may have a width or a thickness of at least one region different from that of the first extraction electrode 400
  • the first bridge pattern 510 may have a width or thickness of at least one region And may be different from other regions of the first bridge electrode 510.
  • at least one of the holes 300 in which the plurality of conductive materials forming the vertically connecting wiring is buried may have different diameters.
  • the conductive pattern including the coil pattern 200, the hole 300 in which the conductive material is embedded, the lead electrode 400, and the bridge pattern 500 can be simultaneously formed by the same process.
  • the conductive pattern can be formed by a method such as printing, plating, or vapor deposition of a conductive material, for example, a metal material, which can be formed at the same time by the same process.
  • the external electrodes 3000 may be provided on two opposite sides of the stacked body 1000, respectively. That is, when the stacking direction of the sheets 100 is the vertical direction (Z direction), the external electrodes 3000 are formed on the first and second side surfaces facing each other in the opposing horizontal direction in the vertical direction of the stack body 1000 .
  • the external electrodes 3000 may be formed on two opposite sides of the stacked body 1000 in the longitudinal direction (i.e., the X direction).
  • two external electrodes 3000 may be provided on the first and second sides. That is, two external electrodes 3000 may be formed on the first and second side surfaces of the two noise filters 2100 and 2200, respectively.
  • first external electrodes 3110 and 3120 connected to the first and second noise filters 2100 are formed to face each other on the first and second sides, respectively, and the first and second noise filters 2200 and 2200
  • the second external electrodes 3210 and 3220 are formed to be spaced apart from the first external electrodes 3110 and 3120 so as to face each other on the first and second sides.
  • the external electrode 3000 may be connected to the first and second noise filters 2100 and 2200 in the stack 1000 and may be connected to an input terminal and an output terminal from the outside of the stack 1000.
  • the external electrodes 3000 formed on the first side of the multilayer filter that is, the first external electrodes 3110 and 3210 are connected to the signal input terminal, and the external electrodes 3000,
  • the second external electrodes 3120 and 3220 may be connected to an output terminal, for example a system.
  • first and second external electrodes 3100 and 3200 may extend from the upper surface and the lower surface of the stacked body 1000. That is, the first external electrodes 3100 are provided on the first and second side surfaces, which are opposed to each other in the X direction of the layered body 3000, and are formed on two sides of the layered body 1000 facing each other in the Z direction, And may be formed extending on the lower surface.
  • the second external electrodes 3200 are provided on the first and second surfaces which are opposed to each other in the X direction of the layered body 1000 and have two surfaces opposed to each other in the Z direction of the layered body 1000, As shown in FIG. Accordingly, the external electrode 3000 may extend from the side surface of the laminate 1000 to the upper surface and the lower surface, and may be formed, for example, in a "C" shape.
  • the first and second external electrodes 3100 and 3200 may be formed of at least one layer.
  • the first and second external electrodes 3100 and 3200 may be formed of a metal layer such as Ag or Cu, and at least one plating layer may be formed on the metal layer.
  • the first and second external electrodes 3100 and 3200 may be formed by laminating a copper layer, a Ni plating layer, and a Sn or Sn / Ag plating layer.
  • the metal layer in contact with the layered body 1000 of the external electrode can be formed by various methods such as plating, vapor deposition, and printing.
  • a metal layer in contact with the laminate 1000 is formed by a plating process, it may be formed of the same material as the lead electrode 400 in the laminate, for example, copper.
  • the first and second external electrodes 3100 and 3200 may be formed by mixing a multi-component glass frit containing, for example, 0.5% to 20% Bi 2 O 3 or SiO 2 as a main component with a metal powder . At this time, a mixture of the glass frit and the metal powder may be prepared in the form of a paste and applied to two opposite surfaces of the laminate 1000. Since the glass frit is included in the first and second external electrodes 3100 and 3200, the adhesion between the first and second external electrodes 3100 and 3200 and the stacked body can be improved, And the second external electrodes 3100 and 3200 can be improved.
  • the first and second outer electrodes 3100 and 3200 may be formed by forming a metal layer containing glass and at least one plating layer on the metal layer.
  • the first and second external electrodes 3100 and 3200 may be formed by forming a layer including at least one of glass frit, Ag and Cu, and sequentially forming an Ni plating layer and a Sn plating layer by electrolytic or electroless plating .
  • the Sn plating layer may be formed to have a thickness equal to or thicker than the Ni plating layer.
  • the first and second external electrodes 3100 and 3200 may be formed to a thickness of 2 ⁇ to 100 ⁇ , a Ni plating layer is formed to a thickness of 1 ⁇ to 10 ⁇ , and a Sn or Sn / And may be formed to a thickness of 10 to 10 mu m.
  • At least two or more coil patterns are connected in the vertical direction to form one noise filter, and at least two noise filters are provided in the horizontal direction in the stacked filter according to an embodiment of the present invention.
  • coil patterns constituting different noise filters can be formed on the same plane, respectively, and the coil patterns formed on the same plane are connected by a bridge pattern. That is, some of the two or more noise filters may be connected by a bridge pattern. Therefore, the present invention can be provided with at least two noise filters in one laminate.
  • the coil pattern constituting at least two or more noise filters is formed of at least one of different number of revolutions and length. Therefore, two or more noise filters can block noise in different frequency bands, respectively.
  • a noise filter having a large number of revolutions has a large impedance and can block low-frequency noise, and a noise filter having a small number of revolutions can reduce noise and high-frequency noise.
  • Impedance can be adjusted by adjusting the number of revolutions and length of the coil pattern constituting the noise filter. Therefore, it is possible to have various impedances and to block noise of various frequencies.
  • the conventional example consists of only one noise filter, and in the embodiment of the present invention, two noise filters are provided and some are connected by a bridge pattern.
  • the insertion loss is about -5 dB and the frequency at this time is about 8 GHz.
  • the insertion loss is about -37 dB and -32 dB, and the frequency is about 2.4 GHz and 5 GHz.
  • the present invention since two peaks can be realized, noise of two or more frequency bands can be blocked by using one element.
  • the insertion loss characteristics can be deeper than that of the conventional commercial products.
  • the noise removing characteristic is better, and since the present invention has a deeper insertion loss characteristic, the noise removing characteristic is superior.
  • the band width of the case (B) of the present invention is wider than that of the conventional case (A). For example, when the insertion loss is -30 dB, the band width of the present invention (B) is wider than the band width of the conventional (A).
  • the present invention can improve the noise removing characteristic due to a low insertion loss, and it is possible to remove noise of various frequencies by enlarging the band width.
  • the noise filter can obtain various impedance and frequency characteristics by changing the number of revolutions of the coil pattern. That is, various characteristics can be obtained by changing the number of revolutions of the coil pattern of the first and second noise filters.
  • the characteristic graph according to this modified example is shown in FIGS. 6 to 8. FIG.
  • FIG. 6 is a graph of frequency characteristics when the number of revolutions of the coil pattern of the first and second noise filters is changed to 5-3, 4-2 and 3-1. That is, the number of revolutions of the coil pattern of the first noise filter was adjusted to 5, 4 and 3, respectively, and the number of revolutions of the coil pattern of the second noise filter was adjusted to 3, 2 and 1, respectively.
  • the position of the frequency peak is adjusted as the number of revolutions of the coil pattern is changed as shown in Fig.
  • the insertion loss is about -37 dB and -34 dB
  • the frequency is about 1.5 GHz and 2 GHz.
  • the insertion loss is about -36 dB and -32 dB, and the frequency is about 1.8 GHz and 3 GHz.
  • the insertion loss is about -35 dB and -25 dB, and the frequency is about 2 GHz and 4.8 GHz.
  • FIG. 7 is a frequency characteristic graph when the number of revolutions of the coil pattern of the first and second noise filters is changed to 3-2 and 3-1. That is, the number of revolutions of the coil pattern of the first noise filter was fixed at 3, and the number of revolutions of the coil pattern of the second noise filter was adjusted to 2 and 1, respectively. As shown in FIG. 7, when the number of revolutions of the coil patterns of the first and second noise filters is 3 and 2, respectively, the insertion loss is about -37 dB and -30 dB, and the frequency is about 2 GHz and 3 GHz.
  • the insertion loss is about -36 dB and -25 dB, and the frequency is about 2 GHz and 5 GHz. That is, the peaks of the first noise filter are commonly formed in the vicinity of about 2 GHz and the peaks of the second noise filter are formed at different frequencies by changing the number of rotations of the coil pattern.
  • the two peaks tend to move independently in accordance with the number of rotations of the coil pattern. Therefore, if only the number of revolutions of one coil pattern is changed, only one of the two peaks can be moved, and the characteristics can be easily implemented.
  • FIG. 8 is a graph of frequency characteristics when the number of revolutions of the coil pattern of the first and second noise filters is changed to 3-1 and 3-3. That is, the number of revolutions of the coil pattern of the first noise filter was fixed at 3, and the number of revolutions of the coil pattern of the second noise filter was adjusted to 1 and 3, respectively. As shown in FIG. 8, when the number of revolutions of the coil patterns of the first and second noise filters is 3 and 1, respectively, the insertion loss is about -35 dB and -25 dB, and the frequency is about 2 GHz and 4.8 GHz.
  • the insertion loss is about -42 dB And the frequency at this time is about 2 GHz. That is, if the number of revolutions of the coil pattern of the two noise filters is made the same, the insertion loss tends to become deeper and the band width as a whole to be larger. However, when the number of revolutions of the coil pattern of the two noise filters is made the same, only one peak is generated. Therefore, by making the number of revolutions of the coil pattern of the two noise filters the same, it is possible to realize a deeper insertion loss than a usual one.
  • the first coil pattern 210 and the fifth coil pattern 250 forming the input and output of one signal are different sheets, that is, the third and seventh sheets 130 and 170, And a second coil pattern 220 and a sixth coil pattern 260 which are provided on the fourth and eighth sheets 140 and 180 respectively for inputting and outputting the other signals.
  • the first and fifth coil patterns 210 and 250 may be formed to be spaced apart on one sheet, and the second and sixth coil patterns 220 and 260 may be formed on one sheet.
  • Figures 9-11 Another embodiment of this invention is shown in Figures 9-11.
  • FIG. 9 is an exploded perspective view of a multilayer filter according to another embodiment of the present invention
  • FIGS. 10 and 11 are cross-sectional views. 1 and FIG. 10 and FIG. 11 are cross-sectional views taken along the line A-A 'and B-B' of FIG. 1, respectively.
  • a circuit circuit element includes a laminate body 1000 in which a plurality of sheets 110 to 170 are laminated, At least two noise filters 2100 and 2200 including at least one coil pattern 200 and an external electrode 3000 formed outside the layered structure 1000 may be included.
  • Another embodiment of the present invention is characterized in that the 1-1 and 1-2 coil patterns 211 and 212 are spaced a predetermined distance apart on the third sheet 130 and the 2- 1 and 2-2 coil patterns 221 and 222 are formed with a predetermined spacing therebetween.
  • the 3-1 and 3-2 coil patterns 231 and 232 are spaced apart from each other by a predetermined distance on the fifth sheet 150 and connected by the first bridge pattern 510, 4-1 and 4-2 coil patterns 241 and 242 are spaced apart from each other by a predetermined distance and connected to each other by a second bridge pattern 520.
  • the upper coil pattern is connected to the lower coil pattern through the vertical connection wiring 300.
  • the first 1-1 coil pattern 211 includes the first vertical connection wiring 300a, that is, the hole 311 in which the 1-1 conductive material is embedded and the hole 321 in which the 2-1 conductive material is embedded
  • the 1-2 coil pattern 212 is connected to the 3-1 coil pattern 231 via the second vertical connection wiring 300b, that is, the hole 312 in which the 1-2 conductive material is embedded, -3 conductive material is connected to the third -2 coil pattern 232 through the hole 323 filled with the conductive material.
  • the 2-1 coil pattern 221 is electrically connected to the third vertical connection wiring 300c, that is, the hole 322 in which the 2-2 conductive material is embedded and the hole 341 in which the 4-1 conductive material is embedded
  • the second-second coil pattern 222 is connected to the fourth vertical connection wiring 300d, that is, the hole 324 in which the 2-4 conductive material is buried, and the third vertical connection wiring 300d, -2 conductive material is connected to the fourth-second coil pattern 242 through the hole 332 filled with the conductive material.
  • the first and third lead electrodes 410 and 430 are formed so as to be connected to the first coil pattern 211 and the second coil pattern 212 and are drawn out in a direction opposite to each other
  • the second and fourth lead electrodes 420 and 440 are formed so as to be connected to the 2-1 coil pattern 221 and the 2-2 coil pattern 222 and are drawn out in directions opposite to each other.
  • the lead-out direction of the first to fourth lead electrodes 410 to 440 and the connection with the external electrode 3000 are the same as in the embodiment of the present invention.
  • another embodiment of the present invention can reduce the number of sheets to be laminated, thereby reducing the height of the laminate.
  • the stacked filter according to the embodiments of the present invention may include two or more noise filters.
  • the stacked filter according to the present invention may be provided with a structure in which at least one of the two or more noise filters, the ESD protection unit, and the capacitor is coupled. That is, at least two noise filters and an ESD protection unit may be combined to realize a stacked filter, and at least two noise filters and capacitors may be combined to stack the stacked filter. Of course, more than two noise filters and capacitors and ESD protection may be combined. Another embodiment of such a stacked filter is shown in Figs. 12 and 13. Fig.
  • an ESD protection material is provided between the upper and lower extension electrodes, but it is also possible to provide the extension electrode in the horizontal direction with the ESD protection material interposed therebetween. That is, the ESD protection part may be provided with the drawing electrode vertically or horizontally with the ESD protection material interposed therebetween. In addition, a separate space may be provided between the drawing electrodes without a separate ESD protection material, and discharge may be performed through the empty space.
  • FIG. 12 is an assembled perspective view of a stacked filter according to another embodiment of the present invention
  • FIG. 13 is an exploded perspective view illustrating a stacked filter having an ESD protection portion coupled thereto.
  • a stacked filter according to another embodiment of the present invention includes a stacked body 1000 in which a plurality of sheets are stacked, at least two noise filters 2100, 2200, 2000, An ESD protection unit 4000 for protecting the external electrode 3000, and an external electrode 3000.
  • the external electrodes 3000 are formed on the first and second side surfaces of the stack 1000 facing each other and are connected to the first and second external electrodes 3000 connected to the at least two noise filters 2000 and the ESD protection unit 4000.
  • the first and second external electrodes 3100 and 3200 are formed on the third and fourth sides of the stacked body 1000 where the first and second external electrodes 3100 and 3200 are not formed and are connected to the ESD protection part 4000 And may further include third external electrodes 3310, 3320, and 3300.
  • third external electrodes 3310, 3320, and 3300 may further include third external electrodes 3310, 3320, and 3300.
  • the ESD protection unit 4000 is formed by stacking a plurality of sheets 191 and 192, each of which has a lead electrode and a hole selectively formed thereon. Sheets 191 and 192 of the ESD protection portion 4000 may be provided between the lower cover layer and the noise filter or between the noise filter and the upper cover layer. Of course, the sheets 191 and 192 of the ESD protection portion 4000 may be provided between the noise filters.
  • the sheets 191 and 192 of the ESD protection part 4000 according to another embodiment of the present invention are provided between the lower cover layer and the noise filter, that is, between the eighth and ninth sheets 180 and 190 Explain.
  • a plurality of lead electrodes 451, 452, 453, 454, 450 are formed on the upper surface of the sheet 191.
  • the plurality of extraction electrodes 450 can be formed at the same position as the extraction electrodes 400 of the plurality of noise filters 2000. That is, a plurality of extension electrodes 450 of the ESD protection unit 4000 may be formed to correspond to the plurality of extension electrodes 400 of the plurality of noise filters 2000. Therefore, the extraction electrode 450 is connected to the first and second external electrodes 3100 and 3200 together with the extraction electrode 400 of the plurality of noise filters 2000.
  • a plurality of holes 610 to 640 are formed on the sheet 191.
  • a plurality of holes 610 to 640 may be formed at one end of the plurality of extraction electrodes 450, Further, the plurality of holes 610 to 640 are each filled with an ESD protection material.
  • the ESD protection material may be formed of a material in which at least one conductive material selected from RuO 2 , Pt, Pd, Ag, Au, Ni, Cr, and W is mixed with an organic material such as PVA (polyvinyl alcohol) or PVB have.
  • the ESD protection material may be formed by further mixing a varistor material such as ZnO or an insulating ceramic material such as Al2O3 to the mixed material.
  • various protective materials can be filled, for example, porous insulating material can be filled, and holes 610 to 640 can be kept open.
  • a lead electrode 460 is formed which is exposed in the longitudinal direction of the sheet 192.
  • the lead-out electrode 460 may be formed along the short side from one long side of the sheet 192 to another opposite side thereof.
  • the lead electrodes 460 are connected to the third external electrodes 3300 formed on the third and fourth side faces of the stacked body 1000, which face each other.
  • a predetermined region of the lead electrode 460 is connected to the holes 610 to 640 of the sheet 191.
  • the portion connected to the holes 610 to 640 may be formed to have a width larger than other regions have.
  • the present invention may further include a capacitor.
  • a capacitor In the case where a capacitor is further provided, at least one internal electrode may be provided in the stacked body 1000.
  • the internal electrodes overlap with at least a part of the coil pattern so that a capacitance can be formed therebetween.
  • the stacked filter having such a capacitor is provided with internal electrodes except for the ESD protection part in the configuration shown in FIGS. 12 and 13, so that detailed description and illustration thereof will be omitted.
  • FIGS. 14 and 15 are schematic diagrams of a stacked filter according to embodiments of the present invention, which are schematic views of first and second noise filters and a bridge pattern.
  • FIG. 16 and 17 are graphs showing the frequency characteristics and the impedance characteristics of the multilayer filter according to the plurality of embodiments of the present invention. That is, FIGS. 14 and 15 are schematic diagrams of a multilayer filter according to various shapes of a bridge pattern, and FIGS. 16 and 17 are graphs showing frequency characteristics and impedance characteristics thereof.
  • the bridge pattern 500 may be formed between the end of the first noise filter 2100 and the end of the second noise filter 2200.
  • the conductive layer formed between the extension line of the outermost coil pattern of the first noise filter 2100 in the horizontal direction and the extension line of the outermost coil pattern of the second noise filter 2200 in the horizontal direction forms the bridge pattern 500, . ≪ / RTI >
  • the bridge pattern 500 of the first to seventh embodiments has a first region horizontal to the outermost coil pattern of the first noise filter 2100 and a second region orthogonal to the outermost coil pattern of the second noise filter 2200 2 < / RTI > area.
  • the bridge pattern 500 has a similar shape, and the distance from the noise filter, the overlap of the first and second bridge patterns 510 and 520, the width of the bridge pattern 500 Respectively.
  • the bridge pattern 500 was formed in the oblique direction, and in Example 9, the bridge pattern 500 was formed so as to be bent so that the length of the bridge pattern 500 was changed.
  • the shape of the bridge pattern 500 of the first to ninth embodiments will be described in more detail as follows.
  • the bridge pattern is formed adjacent to the first noise filter 2100 at an interval equal to the interval of the coil patterns of the first noise filter 2100.
  • the bridge pattern is formed adjacent to the second noise filter 2200 at an interval equal to the interval of the coil pattern of the second noise filter 2200.
  • the first bridge pattern and the second bridge pattern are formed without being overlapped with each other. That is, the first bridge pattern is formed in a 1/3 region between the first and second noise filters 2100 and 2200 by being biased by the first noise filter 2100, and the second bridge pattern is formed by the second noise And is biased by the filter 2200.
  • the first bridge pattern 510 is formed adjacent to the first noise filter 2100 at the same intervals as the intervals of the coil patterns of the first noise filter 2100
  • the second bridge pattern 520 is formed adjacent to the second noise filter 2200 at the same interval as the coil pattern of the second noise filter 2200.
  • the width of the bridge pattern is wide. That is, the widths of the first and second bridge patterns are made to be equal to each other but wider than the width of the coil pattern.
  • the width of the second bridge pattern 520 is greater than that of the first bridge pattern 510 as shown in FIG. 15 (b). That is, the first bridge pattern 510 is formed to have the same width as the coil pattern, and the second bridge pattern 520 is formed to have a wider width than the first bridge pattern 510.
  • the bridge pattern is formed in an oblique line to shorten the length of the bridge pattern.
  • the frequency characteristics can be finely adjusted. That is, the insertion loss is about -34 dB and -28 dB, and the insertion loss and frequency can be finely adjusted to about 1% at about 2.7 GHz and 5.1 GHz.
  • the impedance characteristic can be finely adjusted. As described above, it is possible to finely adjust the frequency and the impedance by deforming the bridge pattern such as the length of the bridge pattern, the distance between the bridge pattern and the noise filter, and whether or not two or more bridge patterns overlap each other. Although the frequency and impedance characteristics are not greatly changed according to the shape deformation of the bridge paddle, fine adjustment is necessary to meet the specification required in actual product design. In this case, the deformation of the bridge pattern is useful .

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

La présente invention concerne un filtre empilé comprenant : un corps empilé dans lequel une pluralité de feuilles sont empilées; au moins deux filtres antiparasites disposés dans le corps empilé et ayant chacun une pluralité de motifs de bobine; un motif de pont reliant au moins une partie desdits deux filtres antiparasites l'un à l'autre; et une électrode externe disposée à l'extérieur du corps empilé et connectée auxdits deux filtres antiparasites.
PCT/KR2018/014986 2017-11-30 2018-11-29 Filtre empilé WO2019107984A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880005290.5A CN110114847A (zh) 2017-11-30 2018-11-29 层叠式滤波器

Applications Claiming Priority (4)

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KR20170162695 2017-11-30
KR10-2017-0162695 2017-11-30
KR1020180131914A KR102122026B1 (ko) 2017-11-30 2018-10-31 적층형 필터
KR10-2018-0131914 2018-10-31

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WO2019107984A1 true WO2019107984A1 (fr) 2019-06-06

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060103273A (ko) * 2004-08-25 2006-09-28 가부시키가이샤 무라타 세이사쿠쇼 노이즈 필터 및 노이즈 필터 어레이
JP2013098257A (ja) * 2011-10-28 2013-05-20 Tdk Corp コモンモードフィルタ
KR101445741B1 (ko) * 2013-05-24 2014-10-07 주식회사 이노칩테크놀로지 회로 보호 소자
KR101554333B1 (ko) * 2014-03-28 2015-09-21 주식회사 이노칩테크놀로지 회로 보호 소자
KR101735599B1 (ko) * 2015-11-11 2017-05-16 주식회사 모다이노칩 회로 보호 소자

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060103273A (ko) * 2004-08-25 2006-09-28 가부시키가이샤 무라타 세이사쿠쇼 노이즈 필터 및 노이즈 필터 어레이
JP2013098257A (ja) * 2011-10-28 2013-05-20 Tdk Corp コモンモードフィルタ
KR101445741B1 (ko) * 2013-05-24 2014-10-07 주식회사 이노칩테크놀로지 회로 보호 소자
KR101554333B1 (ko) * 2014-03-28 2015-09-21 주식회사 이노칩테크놀로지 회로 보호 소자
KR101735599B1 (ko) * 2015-11-11 2017-05-16 주식회사 모다이노칩 회로 보호 소자

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