CN113473694A - Wiring structure of PCB and PCB - Google Patents
Wiring structure of PCB and PCB Download PDFInfo
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- CN113473694A CN113473694A CN202110723679.7A CN202110723679A CN113473694A CN 113473694 A CN113473694 A CN 113473694A CN 202110723679 A CN202110723679 A CN 202110723679A CN 113473694 A CN113473694 A CN 113473694A
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- straight line
- line segments
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- spiral direction
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- 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
- H05K1/0228—Compensation of cross-talk by a mutually correlated lay-out of printed circuit traces, e.g. for compensation of cross-talk in mounted connectors
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Structure Of Printed Boards (AREA)
Abstract
The invention provides a PCB (printed circuit board) and a wiring structure thereof. This walk the line structure and include: the signal transmission device comprises N straight-line segments arranged in parallel and N-1 bending line segments used for connecting the N straight-line segments in pairs, wherein N is an odd number and is more than or equal to 5, and (N +1)/2 straight-line segments and the bending line segments between the straight-line segments, which are sequentially connected from a starting straight-line segment positioned on one side edge to a middle straight-line segment positioned at the middle position, are provided with a first spiral winding structure surrounded from an outer layer to an inner layer, so that a transmitted signal has a first spiral direction; the sequentially connected (N +1)/2 straight line segments and the bent line segments between the two straight line segments from the middle straight line segment at the most middle position to the end straight line segment at the edge of the other side have a second spiral winding structure surrounded by an inner layer and an outer layer, so that the transmitted signal has a second spiral direction opposite to the first spiral direction. The invention can reduce the parasitic capacitance effect between adjacent signal lines.
Description
Technical Field
The invention relates to the technical field of Printed Circuit Boards (PCBs), in particular to a PCB routing structure and a PCB.
Background
Currently, as high-end mobile phones have a variety of functions, the number of electronic components per unit area of a Printed Circuit Board (PCB) is increasing. Particularly, in the 5G era, the size of the whole mobile phone is limited, but the requirement for high-speed signals is higher and higher. The high-speed signal has a requirement specification for the time delay of the signal, and the signal timing must be adjusted by controlling the wire length through the PCB wiring, but the length of the wiring only affects one aspect of the signal timing, and the parasitic effect increase between adjacent signal wires caused by controlling the wire length during wiring is also an aspect which must be considered for improvement.
For example, in the prior art, the problem of line length adjustment can be well solved when the wiring space is limited by the serpentine wiring, but the adjacent signal lines are still relatively close to each other, and then the parasitic capacitance effect between the adjacent signal lines can cause partial energy of the input signal to directly jump between the two lines, so that the effect of the design for the purpose cannot be achieved.
Disclosure of Invention
In order to solve the above problems, the present invention provides a PCB board and a routing structure thereof, which can reduce the parasitic capacitance effect between adjacent signal lines.
In one aspect, the present invention provides a routing structure of a PCB, including:
n straight-line segments arranged in parallel and N-1 bending line segments used for connecting the N straight-line segments in pairs, wherein N is an odd number and is more than or equal to 5,
the sequentially connected (N +1)/2 straight line segments and the bent line segments between the two straight line segments from the initial straight line segment at one side edge to the middle straight line segment at the most middle position have a first spiral winding structure surrounded from the outer layer to the inner layer, so that the transmitted signal has a first spiral direction;
the sequentially connected (N +1)/2 straight line segments and the bent line segments between the two straight line segments from the middle straight line segment at the most middle position to the end straight line segment at the edge of the other side have a second spiral winding structure surrounded by an inner layer and an outer layer, so that the transmitted signal has a second spiral direction opposite to the first spiral direction.
Optionally, if the first spiral direction is a clockwise spiral direction, the second spiral direction is a counterclockwise spiral direction;
if the first spiral direction is a counterclockwise spiral direction, the second spiral direction is a clockwise spiral direction.
Optionally, the bending line segment includes a straight line portion and fold line portions located at two sides of the straight line portion, the fold line portions are connected with adjacent straight line portions, an included angle between each fold line portion and the corresponding straight line portion is 45 degrees or 135 degrees, or each fold line portion is arc-shaped, and the straight line portions are perpendicular to the corresponding straight line portions.
Optionally, the N straight line segments are arranged at equal intervals.
Optionally, the distance between any two straight line segments is at least 3W, where W is the line width of the straight line segment.
Optionally, the routing structure is configured to transmit high-speed signals, where the high-speed signals include single-ended high-speed signals and differential high-speed signals.
In another aspect, the present invention provides a PCB having the routing structure of the PCB.
The routing structure of the PCB and the PCB provided by the invention can achieve the purpose of adjusting the length of the wire in the same routing space, thereby adjusting the time sequence of the transmission signal, effectively reducing the parasitic capacitance effect between adjacent wires due to the change of the routing mode, well achieving the design purpose and improving the signal quality. The method is particularly suitable for high-density mobile phone PCB design, and particularly can solve the problems of limited wiring space and high-speed signal quality improvement in a scene of controlling the time sequence by aiming at the high-speed signal in a 5G mobile phone platform.
Drawings
Fig. 1 is a schematic view of a routing structure according to an embodiment of the invention;
fig. 2 is a schematic view of a routing structure according to an embodiment of the invention;
fig. 3 is a schematic view of a routing structure according to an embodiment of the invention;
fig. 4 is a schematic view of a trace structure according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The embodiment of the invention provides a routing structure of a PCB, which comprises: n straight-line segments arranged in parallel and N-1 bending line segments used for connecting the N straight-line segments in pairs, wherein N is an odd number and is more than or equal to 5,
the sequentially connected (N +1)/2 straight line segments and the bent line segments between the two straight line segments from the initial straight line segment at one side edge to the middle straight line segment at the most middle position have a first spiral winding structure surrounded from the outer layer to the inner layer, so that the transmitted signal has a first spiral direction;
the sequentially connected (N +1)/2 straight line segments and the bent line segments between the two straight line segments from the middle straight line segment at the most middle position to the end straight line segment at the edge of the other side have a second spiral winding structure surrounded by an inner layer and an outer layer, so that the transmitted signal has a second spiral direction opposite to the first spiral direction.
Optionally, if the first spiral direction is a clockwise spiral direction, the second spiral direction is a counterclockwise spiral direction; if the first spiral direction is a counterclockwise spiral direction, the second spiral direction is a clockwise spiral direction.
In one embodiment, the bending line segment connecting the straight line segments may include a straight line portion and a folding line portion located on both sides of the straight line portion, the folding line portion is connected to the adjacent straight line segment, and an included angle between the folding line portion and the straight line segment is 45 degrees or 135 degrees, or the folding line portion is in an arc shape, and the straight line portion is perpendicular to the straight line segment.
In addition, in the embodiment of the invention, the N straight line segments are arranged at equal intervals. The distance between any two straight line segments is at least 3W, wherein W is the line width of the straight line segments. 3W means that: for a transmission line with a transmission line characteristic impedance of 50 ohms, the line spacing is 3 times the signal line width. The straight line segments and the bent line segments are generally the same width. Because of the spiral winding structure, the lengths of each straight line segment and each bending line segment are different.
In order to fully understand the embodiments of the present invention, some specific wiring structures are listed below.
Since the trace is actually a straight line when N is equal to 1, and the most basic serpentine trace can be adopted when N is equal to 3, in the trace structure of the embodiment of the present invention, N is 5 as minimum.
Fig. 1 shows a routing structure of an embodiment of the present invention corresponding to N-5. As shown in fig. 1, the routing structure includes 5 straight line segments in the vertical direction, the first straight line segment from the left is marked as an initial straight line segment, the first straight line segment from the right is marked as a termination straight line segment, the straight line segment at the most middle position is marked as a middle straight line segment, 5 straight line segments are labeled, the first straight line segment from the left is labeled as 1, the second straight line segment from the right is labeled as 2, the middle straight line segment is labeled as 3, the second straight line segment from the left is labeled as 4, and the first straight line segment from the right is labeled as 5. The straight line segments numbered 1-3 and the bent line segments between the straight line segments have a first spiral winding structure surrounded from an outer layer to an inner layer, so that the transmitted signal has a clockwise spiral direction; the straight line segments numbered 3-5 and the bent line segments therebetween have a second spiral winding structure surrounded by an inner layer toward an outer layer, so that the transmitted signal has a counterclockwise spiral direction. Of course, the positions of the starting straight line segment and the ending straight line segment can be interchanged, and the direction of the transmission signal can also be changed. Finally, the direction of the signals transmitted on the straight line segments of the two side edges is the same as seen from the direction of the signals transmitted.
Fig. 2 shows a routing structure of an embodiment of the present invention corresponding to N-7. As shown in fig. 2, the routing structure includes 7 straight line segments in the vertical direction, the first straight line segment from the left is marked as an initial straight line segment, the first straight line segment from the right is marked as a termination straight line segment, the straight line segment at the most middle position is marked as a middle straight line segment, the 7 straight line segments are numbered, the first straight line segment from the left is numbered 1, the second straight line segment from the right is numbered 2, the third straight line segment from the left is numbered 3, the middle straight line segment is numbered 4, the third straight line segment from the right is numbered 5, the second straight line segment from the left is numbered 6, and the first straight line segment from the right is numbered 7. The straight line segments numbered 1-4 and the bent line segments between the straight line segments have a first spiral winding structure surrounded from the outer layer to the inner layer, so that the transmitted signal has a clockwise spiral direction; the straight line segments numbered 4-7 and the bent line segments therebetween have a second spiral winding structure surrounded by an inner layer toward an outer layer such that the transmitted signal has a counterclockwise spiral direction.
Fig. 3 shows a routing structure of an embodiment of the present invention corresponding to N ═ 9. As shown in fig. 3, the routing structure includes 9 straight line segments in the vertical direction, the first straight line segment from the left is marked as an initial straight line segment, the first straight line segment from the right is marked as a termination straight line segment, the straight line segment at the most middle position is marked as a middle straight line segment, the 9 straight line segments are numbered, the first straight line segment from the left is numbered 1, the second straight line segment from the right is numbered 2, the third straight line segment from the left is numbered 3, the fourth straight line segment from the right is numbered 4, the middle straight line segment is numbered 5, the fourth straight line segment from the left is numbered 6, the third straight line segment from the right is numbered 7, the second straight line segment from the left is numbered 8, and the first straight line segment from the right is numbered 9. The straight line segments numbered 1-5 and the bent line segments between the straight line segments have a first spiral winding structure surrounded from the outer layer to the inner layer, so that the transmitted signal has a clockwise spiral direction; the straight line segments numbered 5-9 and the bent line segments therebetween have a second spiral winding structure surrounded by an inner layer toward an outer layer such that the transmitted signal has a counterclockwise spiral direction.
Fig. 4 shows a routing structure of an embodiment of the present invention corresponding to N ═ 11. As shown in fig. 4, the routing structure includes 11 straight line segments in the vertical direction, the first straight line segment from the left is the starting straight line segment, the first straight line segment from the right is the ending straight line segment, the straight line segment at the most middle position is the middle straight line segment, the 11 straight line segments are numbered, the first straight line segment from the left is numbered 1, the second straight line segment from the right is numbered 2, the third straight line segment from the left is numbered 3, the fourth straight line segment from the right is numbered 4, the fifth straight line segment from the left is numbered 5, the straight line segment from the middle is numbered 6, the fifth straight line segment from the right is numbered 7, the fourth straight line segment from the left is numbered 8, the third straight line segment from the right is numbered 9, the second straight line segment from the left is numbered 10, and the first straight line segment from the right is numbered 11. The straight line segments numbered 1-6 and the bent line segments between the straight line segments have a first spiral winding structure surrounded from the outer layer to the inner layer, so that the transmitted signal has a clockwise spiral direction; the straight line segments numbered 6-11 and the bent line segments therebetween have a second spiral winding structure surrounded by an inner layer toward an outer layer such that the transmitted signal has a counterclockwise spiral direction.
As can be seen from the above examples, the relationship between the index of the middle straight line segment and N is fixed and takes the value of (N +1)/2, the index of the starting straight line segment is 1, and the index of the ending straight line segment is N. Taking the left straight line segment as a start, and marking the number of N straight line segments from 1 to N as follows: left 1 (reference numeral 1), right 2 (reference numeral 2), left 3 (reference numeral 3), right 4 (reference numeral 4), left 5 (reference numeral 5), … …, the most middle line segment (reference numeral (N +1)/2), … …, right 5 (reference numeral N-4), left 4 (reference numeral N-3), right 3 (reference numeral N-2), left 2 (reference numeral N-1), right 1 (reference numeral N).
In addition, the routing structure of the embodiment of the invention is suitable for single-ended high-speed signals and differential high-speed signals, when the single-ended high-speed signals are transmitted, the signal lines are single lines, and when the differential high-speed signals are transmitted, the signal lines are two lines in pairs. The above embodiments show the routing structure for transmitting single-ended high-speed signals, and the routing structure for transmitting differential high-speed signals can be obtained by analogy, and description is not repeated.
The wiring structure provided by the embodiment of the invention is a spiral winding structure, compared with a serpentine line, the purpose of adjusting the length of the line can be achieved in the same wiring space, so that the time sequence of a transmission signal is adjusted, and due to the change of the wiring mode, the parasitic capacitance effect between adjacent lines is effectively reduced, the design purpose can be well achieved, and the signal quality is improved.
Finally, the applicant conducted a simulation comparison test in order to verify the effect of the spiral routing. The simulation contrast test uses three types of wiring patterns, namely a linear type wiring, a spiral type wiring and a snake-shaped wiring, wherein the three types of wiring have consistent lengths, and the line spacing and the occupied area of the spiral type wiring and the snake-shaped wiring are consistent. And extracting S parameters of the three wires through SIWAVE, and performing link building simulation on a Designer matched with ANSYS. Simulation results show that the time delay of the snake-shaped routing mode is obviously faster than that of the linear routing due to electromagnetic coupling with the same routing length, and the time delay of the spiral-shaped routing mode is almost close to that of the linear routing due to the improvement and optimization of the coupling path.
On the other hand, the embodiment of the invention also provides a PCB, and the PCB has the routing structure of the PCB of the above embodiment.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A routing structure of a PCB board is characterized in that the routing structure comprises:
n straight-line segments arranged in parallel and N-1 bending line segments used for connecting the N straight-line segments in pairs, wherein N is an odd number and is more than or equal to 5,
the sequentially connected (N +1)/2 straight line segments and the bent line segments between the two straight line segments from the initial straight line segment at one side edge to the middle straight line segment at the most middle position have a first spiral winding structure surrounded from the outer layer to the inner layer, so that the transmitted signal has a first spiral direction;
the sequentially connected (N +1)/2 straight line segments and the bent line segments between the two straight line segments from the middle straight line segment at the most middle position to the end straight line segment at the edge of the other side have a second spiral winding structure surrounded by an inner layer and an outer layer, so that the transmitted signal has a second spiral direction opposite to the first spiral direction.
2. The trace structure of a PCB according to claim 1, wherein if the first spiral direction is a clockwise spiral direction, the second spiral direction is a counterclockwise spiral direction;
if the first spiral direction is a counterclockwise spiral direction, the second spiral direction is a clockwise spiral direction.
3. The routing structure of the PCB according to claim 1, wherein the bending line section includes a straight line portion and a folding line portion located at two sides of the straight line portion, the folding line portion is connected to an adjacent straight line portion, an included angle between the folding line portion and the straight line portion is 45 degrees or 135 degrees, or the folding line portion is arc-shaped, and the straight line portion is perpendicular to the straight line portion.
4. The trace structure of a PCB according to claim 1, wherein the N straight line segments are arranged at equal intervals.
5. The trace structure of a PCB according to claim 4, wherein a distance between any two straight line segments is at least 3W, where W is a line width of the straight line segment.
6. The trace structure of a PCB according to claim 1, wherein the trace structure is used for transmitting high-speed signals, and the high-speed signals include single-ended high-speed signals and differential high-speed signals.
7. A PCB board having a trace structure of the PCB board of any one of claims 1 to 6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110723679.7A CN113473694A (en) | 2021-06-28 | 2021-06-28 | Wiring structure of PCB and PCB |
| PCT/CN2021/141301 WO2023273245A1 (en) | 2021-06-28 | 2021-12-24 | Pcb wiring structure and pcb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110723679.7A CN113473694A (en) | 2021-06-28 | 2021-06-28 | Wiring structure of PCB and PCB |
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| Publication Number | Publication Date |
|---|---|
| CN113473694A true CN113473694A (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110723679.7A Pending CN113473694A (en) | 2021-06-28 | 2021-06-28 | Wiring structure of PCB and PCB |
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| Country | Link |
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| CN (1) | CN113473694A (en) |
| WO (1) | WO2023273245A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023273245A1 (en) * | 2021-06-28 | 2023-01-05 | 展讯通信（上海）有限公司 | Pcb wiring structure and pcb |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040155675A1 (en) * | 2003-02-07 | 2004-08-12 | Zerbe Jared L. | Input/output circuit with on-chip inductor to reduce parasitic capacitance |
| US20080315300A1 (en) * | 2007-06-19 | 2008-12-25 | Elpida Memory, Inc. | Semiconductor device and method for manufacturing semiconductor device |
| JP2009140279A (en) * | 2007-12-07 | 2009-06-25 | Topre Corp | Pattern plate for destruction detection |
| JP2009193119A (en) * | 2008-02-12 | 2009-08-27 | Topre Corp | Safety case for data |
| CN106357850A (en) * | 2016-10-21 | 2017-01-25 | 努比亚技术有限公司 | Apparatus for improving electromagnetic radiation and terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101668385B (en) * | 2008-09-05 | 2012-01-25 | 华硕电脑股份有限公司 | Delay line suitable for printed circuit board |
| CN103747627A (en) * | 2013-12-24 | 2014-04-23 | 延锋伟世通电子科技（上海）有限公司 | Method for manufacturing inductance device by using printed circuit board |
| JP6365933B2 (en) * | 2014-07-17 | 2018-08-01 | 住友電工プリントサーキット株式会社 | Flexible printed wiring board, antenna and wireless power feeder |
| CN112770486B (en) * | 2020-12-30 | 2022-05-10 | 环旭电子股份有限公司 | Printed circuit board transmission line as millimeter wave attenuator |
| CN113473694A (en) * | 2021-06-28 | 2021-10-01 | 展讯通信（上海）有限公司 | Wiring structure of PCB and PCB |
-
2021
- 2021-06-28 CN CN202110723679.7A patent/CN113473694A/en active Pending
- 2021-12-24 WO PCT/CN2021/141301 patent/WO2023273245A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040155675A1 (en) * | 2003-02-07 | 2004-08-12 | Zerbe Jared L. | Input/output circuit with on-chip inductor to reduce parasitic capacitance |
| US20080315300A1 (en) * | 2007-06-19 | 2008-12-25 | Elpida Memory, Inc. | Semiconductor device and method for manufacturing semiconductor device |
| JP2009140279A (en) * | 2007-12-07 | 2009-06-25 | Topre Corp | Pattern plate for destruction detection |
| JP2009193119A (en) * | 2008-02-12 | 2009-08-27 | Topre Corp | Safety case for data |
| CN106357850A (en) * | 2016-10-21 | 2017-01-25 | 努比亚技术有限公司 | Apparatus for improving electromagnetic radiation and terminal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023273245A1 (en) * | 2021-06-28 | 2023-01-05 | 展讯通信（上海）有限公司 | Pcb wiring structure and pcb |
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| Publication number | Publication date |
|---|---|
| WO2023273245A1 (en) | 2023-01-05 |
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Application publication date: 20211001 |