CN103974519B - Printed circuit board - Google Patents
Printed circuit board Download PDFInfo
- Publication number
- CN103974519B CN103974519B CN201310032996.XA CN201310032996A CN103974519B CN 103974519 B CN103974519 B CN 103974519B CN 201310032996 A CN201310032996 A CN 201310032996A CN 103974519 B CN103974519 B CN 103974519B
- Authority
- CN
- China
- Prior art keywords
- circuit board
- printed circuit
- fluting
- ground plane
- metal sheet
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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- 239000002184 metal Substances 0.000 claims abstract description 32
- 238000010586 diagram Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- Structure Of Printed Boards (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
A printed circuit board comprises a grounding layer, a top layer, a bottom layer and a connector imprint. The connector imprint is used for installing a connector, and comprises a first metal sheet and a second metal sheet which are arranged on the top layer. The first metal sheet penetrates through a plurality of first pass holes, and is electrically connected to the grounding layer, the second metal sheet penetrates through a plurality of second pass holes, and is electrically connected to the grounding layer, a first open hole and a second open hole are formed in the first metal sheet and the second metal sheet respectively, the joint of each first pass hole and the grounding layer and the joint of each second pass hole and the grounding layer are hollowed out to form a first open groove and a second open groove respectively, each first open groove is communicated with the corresponding second open groove through a third open groove formed in the grounding layer, and the third open grooves are located over the path passed by a differential mode signal line which is connected out of the connector and arranged on the bottom layer. By means of the printed circuit board of an electromagnetic energy gap structure, background noise can be better lowered. By means of the printed circuit board, common-mode noise can well be restrained, and thus signal integrity is improved.
Description
Technical field
The present invention relates to a kind of printed circuit board (PCB).
Background technology
In high speed circuit, wide come the transmission carrying out data using differential mode (Differential Mode) signal
It is applied in various electronic products generally.Difference mode signal has higher tolerance level to noise, is not easily susceptible to the dry of high-frequency noise
Disturb and cause the mistake of system.Additionally, for common mode (Common Mode) signal, difference mode signal is because in two circuits
The relation of phase 180 degree, produced radiation (Radiation) has the effect of payment, therefore in electromagnetic interference
(Electromagnetic Interference) aspect relatively has advantage.
In electronic circuit, the factor such as the corner of circuit, noise jamming, difference mode signal cause not of uniform size all can make
Least a portion of difference mode signal is converted into the noise of common mode kenel, and this noise can reduce the signal integrity degree (Signal in circuit
Integrity).The marking for adapter（footprint）For, exactly because connector structure limits so that from even
Connect two difference mode signal lines of device extraction before carrying out real difference mode signal cabling it is necessary to first respectively pull out one section of single-ended signal
Line, is unfavorable for that integral passage differential mode shows, and is easily subject to noise jamming.
Content of the invention
In view of the foregoing it is necessary to provide a kind of printed circuit board (PCB), it can preferably solve to set from printed circuit board (PCB)
The noise jamming problem caused by two difference mode signal lines drawn at the adapter put.
A kind of printed circuit board (PCB), including：
Ground plane；
Top layer；
Bottom；And
The adapter marking, for installing a connector, this adapter marking include being arranged on top layer first and second
Sheet metal, this first sheet metal central authorities is provided with the first perforate, and this second sheet metal central authorities is provided with the second perforate, some first vias
Through the first sheet metal and be electrically connected to ground plane, some second vias pass through the second sheet metal and are electrically connected to ground plane, its
In one first via and one second via be hollowed out to form one first fluting and one second fluting respectively with ground plane junction,
And first fluting be communicated in the second fluting also by the 3rd fluting being opened in ground plane, the 3rd fluting be located at by adapter
On pick out and be arranged at the surface of the difference mode signal line paths traversed on bottom.
Fluting on ground plane in above-mentioned printed circuit board (PCB) can produce electric capacity and inductance, and is to form in parallel,
The common-mode noise on ground plane therefore can be stopped in specific frequency range, to reach the purpose of promotion signal integrity.
Brief description
Fig. 1 and Fig. 2 is the schematic diagram of printed circuit board (PCB) better embodiment of the present invention.
Fig. 3 is the simulation result comparison diagram of printed circuit board (PCB) of the present invention and existing printed circuit board (PCB).
Main element symbol description
| Ground plane | 10 |
| Top layer | 12 |
| Bottom | 13 |
| Difference mode signal line | 20 |
| First metal disk | 18 |
| Second metal disk | 19 |
| First circular hole | 180 |
| Second circular hole | 190 |
| First via | 182、185 |
| Second via | 192、195 |
| 3rd via | 186 |
| 4th via | 196 |
| 5th via | 150、160 |
| Fluting | 188、198、200 |
Following specific embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Specific embodiment
Below in conjunction with the accompanying drawings and better embodiment is described in further detail to the present invention：
Refer to Fig. 1, the better embodiment of printed circuit board (PCB) of the present invention include ground plane 10, top layer 12 and bottom 13,
The adapter marking（footprint）And a pair of difference mode signal line 20.Certainly, this printed circuit board (PCB) also includes other layers, such as its
Its ground plane, bus plane, signals layer etc., only illustrate ground plane 10, top layer 12 and bottom 13 in present embodiment.
This adapter marking includes some first vias, some second vias, the first round metal being arranged on top layer 12
Piece 18 and the second metal disk 19.The central authorities of this first metal disk 18 offer the first circular hole 180, this second metal disk 19
Central authorities offer the second circular hole 190.
Some first vias pass through this first metal disk 18 and are electrically connected to ground plane 10.Some second vias pass through the
Two metal disks 19 and be electrically connected to ground plane 10.In present embodiment, the first metal disk 18 corresponds to eight the first vias, that is,
Eight the first vias pass through the first metal disk 18 and are electrically connected to ground plane 10；Second metal disk 19 corresponds to eight the second mistakes
Hole, that is, eight the second vias pass through the second metal disk 19 and be electrically connected to ground plane 10.Only mark in Fig. 1 the first via 182,
185 and second via 192,195.Certainly, in other embodiment, first and second via above-mentioned is also electrically coupleable to print
Other ground planes of circuit board, or even all electrically connect with all ground planes of printed circuit board (PCB).
The both sides of the first metal disk 18 are also each provided with one the 3rd via 186, and the both sides of the second metal disk 19 are also each
It is provided with one the 4th via 196.Every one the 3rd via 186 runs through whole printed circuit board (PCB) and is electrically connected to ground plane 10, each
4th via 196 also extends through whole printed circuit board (PCB) and is electrically connected to ground plane 10.Certainly, in other embodiment, above-mentioned
Three and the 4th via is also electrically coupleable to other ground planes of printed circuit board (PCB), or even equal with all ground planes of printed circuit board (PCB)
Electrical connection.
In present embodiment, this first via 182 and 185 is hollowed out to form two flutings 188 with ground plane 10 junction,
This second via 192 and 195 is also hollowed out with ground plane 10 junction to form two flutings 198.And, this two fluting 188 leads to
Cross two fluting 200 correspondence to connect with two flutings 198.
After adapter is installed on circuit board, the two pins of adapter pass through two the 5th via 150 and 160 and electrically connect
In bottom 13.As shown in figure 1, the two difference mode signal lines 20 drawn at the two pins of adapter will be to relatively on bottom 13
Direction extend, afterwards this two difference mode signal lines 20 toward same direction bend 90 degree, can lay in a parallel manner afterwards
On bottom 13.
Please continue to refer to Fig. 2, the fluting 188,198 and 200 on ground plane 10 can make fluting 188,198 and 200 both sides
The accumulation of electric charge is had to produce electric capacity.On the other hand, the common-mode noise return flow path in circuit is on ground plane 10, works as common mode
When noise current runs into fluting 188,198 and 200, fluting 188,198 and 200 can make electric current change direction, that is, must bypass out
Groove 188,198 and 200 just can complete complete return flow path, and this process detouring can make circuit produce extra inductance.
Comprehensive the above, fluting 188,198 and 200 can produce electric capacity and inductance, and is to form in parallel, therefore can be in spy
Fixed frequency range stops the common-mode noise on ground plane 10, to reach the purpose of promotion signal integrity.
Please continue to refer to Fig. 3, its be in the present invention S parameter (S-parameter) analog result of printed circuit board (PCB) with existing
There is the S parameter analog result comparison diagram of printed circuit board (PCB).Curve L1 and L2 is the analog result after not adding fluting, curve L3 and
L4 is plus the analog result after slotting, and curve L1 and L3 represents the situation of difference mode signal transmission, and curve L2 and L4 represents common mode
The situation of signal transmission, wherein numerical value are bigger to represent that the amplitude of signal attenuation is lower.After adding fluting as can be seen from Figure 3, can
To reduce the delivery quality of common-mode noise in the environment of not destroying difference mode signal, therefore can be used to suppression common mode noise, lifting
Signal integrity degree.
In present embodiment, this first via 182,185 and second via 192 and 195 is dug with ground plane 10 junction
Sky is to form fluting 188,198.However, can be seen that from principles illustrated above also can be only by first other embodiment
Via 182 and the second via 192 hollow out to form two flutings with ground plane 10 junction, two flutings are passed through another fluting simultaneously
Connect.It is of course also possible to the other vias on two metal disks and ground plane 10 junction are hollowed out to form fluting, and
By two flutings by another fluting connection, as long as ensureing that this another fluting is located at the surface of difference mode signal line paths traversed
?.
Claims (3)
1. a kind of printed circuit board (PCB), including：
Ground plane；
Top layer；
Bottom；And
The adapter marking, for installing a connector, this adapter marking includes first and second metal being arranged on top layer
Piece, this first sheet metal central authorities is provided with the first perforate, and this second sheet metal central authorities is provided with the second perforate, and some first vias pass through
First sheet metal and be electrically connected to ground plane, some second vias pass through the second sheet metal and are electrically connected to ground plane, and wherein one
First via and one second via are hollowed out with ground plane junction respectively to form one first fluting and one second fluting, and the
One fluting is communicated in the second fluting also by the 3rd fluting being opened in ground plane, and the 3rd fluting is located at and is connect by adapter
Go out and be arranged at the surface of the difference mode signal line paths traversed on bottom.
2. printed circuit board (PCB) as claimed in claim 1 it is characterised in that：This first and second sheet metal is circle.
3. printed circuit board (PCB) as claimed in claim 1 it is characterised in that：This first perforate and the second perforate are circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310032996.XA CN103974519B (en) | 2013-01-29 | 2013-01-29 | Printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310032996.XA CN103974519B (en) | 2013-01-29 | 2013-01-29 | Printed circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103974519A CN103974519A (en) | 2014-08-06 |
| CN103974519B true CN103974519B (en) | 2017-02-08 |
Family
ID=51243405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310032996.XA Expired - Fee Related CN103974519B (en) | 2013-01-29 | 2013-01-29 | Printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103974519B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107318215A (en) * | 2016-04-26 | 2017-11-03 | 鸿富锦精密电子(天津)有限公司 | The electronic installation of printed circuit board (PCB) and the application printed circuit board (PCB) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100367832C (en) * | 2004-05-10 | 2008-02-06 | 富士通株式会社 | Wiring base board, method of producing thereof, and electronic device |
| CN102300395A (en) * | 2010-06-23 | 2011-12-28 | 鸿富锦精密工业（深圳）有限公司 | Printed circuit board |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MXPA04011463A (en) * | 2002-05-23 | 2005-07-01 | Ibm | Improved structure of stacked vias in multiple layer electronic device carriers. |
| TWI360912B (en) * | 2008-04-25 | 2012-03-21 | Univ Nat Chiao Tung | Vertical transition structure |
-
2013
- 2013-01-29 CN CN201310032996.XA patent/CN103974519B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100367832C (en) * | 2004-05-10 | 2008-02-06 | 富士通株式会社 | Wiring base board, method of producing thereof, and electronic device |
| CN102300395A (en) * | 2010-06-23 | 2011-12-28 | 鸿富锦精密工业（深圳）有限公司 | Printed circuit board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103974519A (en) | 2014-08-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160919 Address after: 518000 Guangdong Province, Shenzhen New District of Longhua City, Dalang street, Hua Sheng Lu Yong Jingxuan commercial building 1608 Applicant after: Jinyang Shenzhen sea Network Intelligent Technology Co., Ltd. Address before: 518109 Guangdong city of Shenzhen province Baoan District Longhua Town Industrial Zone tabulaeformis tenth East Ring Road No. 2 two Applicant before: Hongfujin Precise Industry (Shenzhen) Co., Ltd. Applicant before: Hon Hai Precision Industry Co., Ltd. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20161209 Address after: 225699 Jiangsu city of Yangzhou province Gaoyou city Gaoyou Economic Development Zone, Ling Road Applicant after: Jiangsu Transimage Technology Co.,Ltd. Address before: 518000 Guangdong Province, Shenzhen New District of Longhua City, Dalang street, Hua Sheng Lu Yong Jingxuan commercial building 1608 Applicant before: Jinyang Shenzhen sea Network Intelligent Technology Co., Ltd. |
|
| CB03 | Change of inventor or designer information |
Inventor after: Zou Weimin Inventor after: Mao Wuyun Inventor after: Meng Yuting Inventor after: Li Kan Inventor before: Tang Shaoyou Inventor before: Xie Boquan |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170208 Termination date: 20180129 |