WO2015162656A1 - 多層プリント基板 - Google Patents
多層プリント基板 Download PDFInfo
- Publication number
- WO2015162656A1 WO2015162656A1 PCT/JP2014/061118 JP2014061118W WO2015162656A1 WO 2015162656 A1 WO2015162656 A1 WO 2015162656A1 JP 2014061118 W JP2014061118 W JP 2014061118W WO 2015162656 A1 WO2015162656 A1 WO 2015162656A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power supply
- pattern
- capacitor
- multilayer printed
- switching power
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
- H05K1/023—Reduction of cross-talk, noise or electromagnetic interference using auxiliary mounted passive components or auxiliary substances
- H05K1/0233—Filters, inductors or a magnetic substance
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/144—Stacked arrangements of planar printed circuit boards
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/165—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed inductors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/115—Via connections; Lands around holes or via connections
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
- H05K2201/09718—Clearance holes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
- H05K2201/0979—Redundant conductors or connections, i.e. more than one current path between two points
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10015—Non-printed capacitor
Definitions
- the present invention relates to a multilayer printed circuit board on which a switching power supply is mounted.
- General printed circuit boards have resistors, capacitors, coils, and integrated circuits mounted on the surface, and each component is electrically connected with a conductive member such as copper foil to realize an electronic circuit.
- Simple printed circuit boards have copper foil only on the surface and copper foil only on the front and back sides, but printed circuit boards used in personal computers and servers have a multifunctional circuit with a limited surface area. In order to realize this, a multilayer printed board having a copper foil inside the printed board is generally used.
- the printed circuit board using the conventional technique shown in Patent Document 1 aims to simultaneously generate a parasitic inductance component and a parasitic capacitance component in a pattern.
- the parasitic inductance increases as the pattern width decreases and the pattern length increases
- the parasitic capacitance increases as the pattern width increases and the surface area increases, thereby satisfying mutually conflicting requirements simultaneously. There was a need.
- the parasitic inductance L decreases when the width Wp of the printed pattern is increased in order to increase the parasitic capacitance.
- a multilayer printed board having a plurality of wiring layers and mounting a switching power supply
- at least three wide patterns formed in at least three wiring layers in a power supply path connecting a connector connected to an external power supply and the switching power supply, and Vias for connecting the at least three wide patterns
- a first capacitor is connected to the wide pattern on the connector side
- a second capacitor is connected to the wide pattern on the switching power source side
- the at least three wide patterns are connected.
- a parasitic inductance generated by the via, the first capacitor, and the second capacitor constitute a ⁇ -type filter.
- a ⁇ -type filter without a coil can be realized, so that a printed circuit board with reduced cost and reduced mounting area can be provided.
- FIG. 3 is a circuit diagram of a CPU board according to the multilayer printed board of the present invention. It is the figure which showed the equivalent circuit of the CPU board circuit of FIG. It is the figure which looked at the multilayer printed circuit board of the present invention from the top. It is a perspective view of the multilayer printed circuit board of the present invention. It is sectional drawing of the multilayer printed circuit board of this invention. It is a waveform which showed the noise reduction of the multilayer printed circuit board of this invention.
- FIG. 1 is an overall configuration diagram of a server device on which a multilayer printed circuit board according to the present invention is mounted.
- the AC / DC power supply 108 is a device that converts a voltage such as 200 V supplied from the outside into 12 V, and is supplied to the main board 102 via the backplane board 101 connected by the connector 107.
- the CPU 106 mounted on the CPU board 102 is connected to an AC / DC power supply 108 via a switching power supply 105 mounted on the CPU board 102, and the switching power supply 105 receives 12V supplied from the AC / DC power supply 108. Then, it is converted to 0.9V required by the CPU 106.
- a ceramic capacitor is disposed between the connector 107 and the switching power supply 105 for the purpose of reducing noise generated by the switching power supply 105.
- a ceramic capacitor close to the connector 107 is a filter capacitor, and a ceramic capacitor close to the switching power supply 105 is a power supply. These are called IC-side Capacitors and are hereinafter called Cap-Filter and Cap-IC, respectively.
- Cap-Filter 103 and Cap-ICs 104 and 109 are connected between the connector 107 and the switching power supply 105.
- Cap-Filter 103 is the back surface layer of the CPU substrate 102
- Cap-IC 104 is the surface layer of the CPU substrate 102
- Cap-IC 109 is the CPU substrate.
- 102 is disposed on the back surface layer.
- aluminum electrolytic capacitors 110 and 111 and a ceramic capacitor 112 are arranged between the connector 107 and the switching power supply 105 in order to reduce noise generated between the connector 107 and the switching power supply 105.
- FIG. 2 is a circuit diagram of the CPU board 102 according to the multilayer printed board of the present invention.
- the conductor portion 205 and the Cap-ICs 104 and 109 are connected to the input terminal (+) 209 of the switching power supply 105.
- Aluminum electrolytic capacitors 110 and 111, ceramic capacitor 112, Cap-Filter 103, Cap-ICs 104 and 109, and connector 107 are connected to input terminal ( ⁇ ) 210 of switching power supply 105.
- the conductor portion 205 is connected to the aluminum electrolytic capacitors 110 and 111, the ceramic capacitor 112, the Cap-Filter 103, the Cap-ICs 104 and 109, and the connector 213.
- the CPU 106 is connected to the output terminal (+) 211 of the switching power supply 105 and the output terminal ( ⁇ ) 212 of the switching power supply 105 (not shown).
- the conductor part 205 is made up of a printed pattern and Via, and is a part that generates parasitic inductance. Details will be described later.
- FIG. 3 is a diagram showing an equivalent circuit of the CPU board circuit of FIG.
- the parasitic inductance 214 is a parasitic inductance generated in the conductor portion 205 in FIG.
- Aluminum electrolytic capacitors 110 and 111 and ceramic capacitor 112 are bypass capacitors for removing noise generated between connector 107 and switching power supply 105.
- the Cap-Filter 103, the parasitic inductance 214, and the Cap-ICs 104 and 109 constitute a ⁇ -type filter for removing noise generated by the switching power supply 105.
- FIG. 4 is a view of each layer of the multilayer printed board 300 of the present invention as viewed from above.
- a wide pattern 305 is formed on the surface layer 301.
- a wide pattern 306 is formed in the inner wiring layer 302.
- the inner power supply solid pattern 307 is formed in the 12V power supply layer 303.
- Wide patterns 308 and 309 are formed on the back layer 304.
- FIG. 5 is a perspective view of the multilayer printed circuit board 300 of the present invention
- FIG. 6 is a cross-sectional view of the multilayer printed circuit board 300.
- the wide pattern 305 of the front surface layer 301 is connected to the Cap-IC 104, the switching power supply 105, and Vias 317, 318, and 319, and connected to the wide pattern 306 of the inner wiring layer 302 and the wide pattern 308 of the back surface layer 304 by Vias 317, 318, and 319. Is done.
- the wide pattern 306 of the inner wiring layer 302 is connected to the vias 314, 315, 316, 317, 318 and 319, and is connected to the wide pattern 309 of the back surface layer 304 by the vias 314, 315 and 316.
- the inner power supply solid pattern 307 of the 12V power supply layer 303 is connected to the vias 310, 311, 312, and 313, the via 310 is connected to the connector 324, and the vias 311, 312, and 313 are connected to the wide pattern 309 of the back surface layer 304.
- the wide pattern 308 of the back surface layer 304 is connected to the Cap-IC 109 and Vias 317, 318, and 319, and is connected to the wide pattern 305 of the surface layer 301 and the wide pattern 306 of the inner wiring layer 302 by Vias 317, 318, and 319.
- the wide pattern 309 of the back surface layer 304 is connected to the Cap-Filter 103 and the Vias 311, 312, 313, 314, 315, 316, and the Via 311, 312, 313 is connected to the inner power supply solid pattern 307 of the 12 V power supply layer 303, and the Vias 314, 315. 316 is connected to the wide pattern 306 of the inner wiring layer 302.
- the voltage supplied from the AC / DC power supply 108 reaches the switching power supply 105 via the connector 107 and has a circuit that reaches the CPU 106 from the switching power supply 105.
- the aluminum electrolytic capacitors 110 and 111 and the ceramic capacitor 112 are bypass capacitors attached for the purpose of removing noise generated between the connector 107 and the switching power source 105 except for the switching power source 105.
- the aluminum electrolytic capacitors 110 and 111 and the ceramic capacitor 112 correspond to the noise frequency and noise voltage. Therefore, the capacity of aluminum electrolytic capacitors and ceramic capacitors is determined.
- the Cap-Filter 103, the parasitic inductance 214, and the Cap-ICs 104 and 109 are ⁇ -type filters for removing noise generated by the switching power supply 105, and their capacities are determined according to the noise frequency and noise voltage.
- the parasitic inductance constituting the ⁇ -type filter includes the wide pattern 309 of the back surface layer 304, the wide pattern 306 of the inner wiring layer 302, the wide pattern 305 of the surface layer 301, Vias 311, 312 and 313 shown in FIG. Among these, between the wide pattern 309 of the back surface layer 304 and the inner power supply solid pattern 307 of the 12V power supply layer, among the vias 314, 315 and 316, between the wide pattern 306 of the inner wiring layer 302 and the wide pattern 309 of the back surface layer 304, Via 317 and 318. 319 occurs between the wide pattern 306 of the inner wiring layer 302 and the wide pattern 305 of the surface layer 301.
- the parasitic inductance generated in the wide pattern is expressed by the following equation (1) where the length of the printed pattern is Lp [mm], the width is Wp [mm], and the thickness (height) is Hp [mm]. .
- a ⁇ -type filter circuit having a cutoff frequency of 1 [MHz] will be described as an example.
- the total capacitance of Cap-Filter among the capacitor capacitance C is set to 1 [ ⁇ F]
- the capacitance of Cap-IC is set to 1 [ ⁇ F]
- the total capacitance C is set to 2 [ ⁇ F]
- This ⁇ -type filter The cutoff frequency fc that can be expected in the circuit is obtained from the following.
- the parasitic inductance L is obtained from Expression (1) for obtaining the inductance of the print pattern. Is obtained as 0.00523 [ ⁇ H], and all three print patterns have the same shape, the parasitic inductance L generated at the three print patterns is 0.0157 [ ⁇ H].
- the total of the parasitic inductance generated in the printed pattern 0.0157 [ ⁇ H] and the parasitic inductance generated in each Via is 0.063 [ ⁇ H]
- FIG. 7 is a waveform screen of an oscilloscope in which the noise reduction effect is measured using the printed circuit board described above and a printed circuit board using Via.
- the upper waveform is a voltage waveform of 12 V acquired by Via 310 in FIG. 4, the vertical axis is set to 1 [V / div], and Offset is set to 12 [V].
- the lower waveform is a voltage waveform after noise reduction measured by the power supply IC 323 in FIG. 4, and the vertical axis is set to 100 [mV / div] and Offset is set to 12 [V].
- high-frequency noise of 1 [MHz] or more was generated at 5.5 [V] at the time of input of the printed circuit board in the 12 V supply line of the printed circuit board. V].
- a parasitic inductance is generated even if no coil is mounted, a ⁇ -type filter can be configured, and a server device with reduced noise can be provided.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Production Of Multi-Layered Print Wiring Board (AREA)
- Filters And Equalizers (AREA)
Abstract
Description
一方、電気的に接続されていない2つの導体間が完全に遮蔽されていない場合、容量成分である寄生キャパシタンスが発生する。この寄生キャパシタンスの静電容量は、パターン間の比誘電率をεr、プリントパターンの面積をA[cm2]、パターン間の距離をd[cm]とすると下記の式で表される。
これはパターンの面積Aが大きく、パターン間の距離dが短いほど寄生キャパシタンスが増加することを示している。
また、Viaで発生する寄生インダクタンスはViaの高さをH[mm]、直径をd[mm]とすると下記の式(2)で表される。
寄生インダクタンス214を挟んで、コネクタ側にCap-Filter103、スイッチング電源105側にCap-IC104,109を接続することでノイズを除去するπ型フィルタ回路を構成し、スイッチング電源105が発するノイズを低減する。
したがって、この式からfc=1[MHz]、C=2[μF]で期待される寄生インダクタンスLは0.080[μH]と求まるため、π型フィルタ回路を構成するにあたりViaおよびプリントパターンで期待する寄生インダクタンスLは0.080[μH]である。
102:CPU基板
103:Cap-Filter
104:Cap-IC
105:スイッチング電源
106:CPU
107:コネクタ
108:AC/DC電源
109:Cap-IC
110、111:アルミ電解コンデンサ
112:セラミックコンデンサ
205:導体部
214:寄生インダクタンス
300:多層プリント基板
301:表面層
302:内層配線層
303:12V電源層
304:裏面層
305:表面層の幅広パターン
306:内層配線層の幅広パターン
307:12V電源層の内層電源ベタパターン
308、309:裏面層の幅広パターン
310、311、312、313、314、315、316、317、318、319:Via
Claims (8)
- 複数の配線層を有しスイッチング電源を搭載する多層プリント基板において、外部の電源に接続されるコネクタと前記スイッチング電源とを接続する電源経路に少なくとも3つの配線層に形成した少なくとも3つの幅広パターン及び前記少なくとも3つの幅広パターンを接続するビアを設け、前記コネクタ側の幅広パターンに第1のコンデンサを接続し、前記スイッチング電源側の幅広パターンに第2のコンデンサを接続し、前記少なくとも3つの幅広パターンと前記ビアとで発生する寄生インダクタンスと前記第1のコンデンサと前記第2のコンデンサとによりπ型フィルタを構成することを特徴とする多層プリント基板。
- 前記ビアは複数本から成ることを特徴とする請求項1記載の多層プリント基板。
- 表面層に形成した幅広パターンと内層配線層に形成した幅広パターンとを接続する第1のビア及び前記内層配線層に形成した幅広パターンと裏面層に形成した幅広パターンとを接続する第2のビアとを設けたことを特徴とする請求項1記載の多層プリント基板。
- 前記第1のビアと前記第2のビアは各々複数本から成ることを特徴とする請求項3記載の多層プリント基板。
- 前記表面層に形成した幅広パターンに前記スイッチング電源と前記第2のコンデンサを接続し、前記裏面層に形成した幅広パターンに前記第1のコンデンサを接続することを特徴とする請求項3記載の多層プリント基板。
- 前記裏面層に形成した幅広パターンと内層電源層のベタパターンとを接続する第3のビアを設けたことを特徴とする請求項2記載の多層プリント基板。
- 前記第3のビアは複数本から成ることを特徴とする請求項6記載の多層プリント基板。
- 請求項1乃至請求項7のいずれか1項に記載の多層プリント基板を搭載することを特徴とするサーバ装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2016514557A JP6267326B2 (ja) | 2014-04-21 | 2014-04-21 | 多層プリント基板 |
PCT/JP2014/061118 WO2015162656A1 (ja) | 2014-04-21 | 2014-04-21 | 多層プリント基板 |
US15/126,292 US9967969B2 (en) | 2014-04-21 | 2014-04-21 | Multilayer printed circuit board with switching power supply capacitors, broad patterns, and TT-type filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2014/061118 WO2015162656A1 (ja) | 2014-04-21 | 2014-04-21 | 多層プリント基板 |
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WO2015162656A1 true WO2015162656A1 (ja) | 2015-10-29 |
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PCT/JP2014/061118 WO2015162656A1 (ja) | 2014-04-21 | 2014-04-21 | 多層プリント基板 |
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US (1) | US9967969B2 (ja) |
JP (1) | JP6267326B2 (ja) |
WO (1) | WO2015162656A1 (ja) |
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JP2019057946A (ja) * | 2017-02-10 | 2019-04-11 | パナソニックIpマネジメント株式会社 | 多層基板のフィルタ |
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WO2015162656A1 (ja) * | 2014-04-21 | 2015-10-29 | 株式会社日立製作所 | 多層プリント基板 |
CN107318215A (zh) * | 2016-04-26 | 2017-11-03 | 鸿富锦精密电子(天津)有限公司 | 印刷电路板及应用该印刷电路板的电子装置 |
US10251270B2 (en) * | 2016-09-15 | 2019-04-02 | Innovium, Inc. | Dual-drill printed circuit board via |
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Also Published As
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US20170086289A1 (en) | 2017-03-23 |
US9967969B2 (en) | 2018-05-08 |
JP6267326B2 (ja) | 2018-01-24 |
JPWO2015162656A1 (ja) | 2017-04-13 |
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