CN219499632U - Printed circuit board - Google Patents
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- CN219499632U CN219499632U CN202320748041.3U CN202320748041U CN219499632U CN 219499632 U CN219499632 U CN 219499632U CN 202320748041 U CN202320748041 U CN 202320748041U CN 219499632 U CN219499632 U CN 219499632U
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Abstract
The utility model provides a printed circuit board, which is provided with a first hole, a second hole and a third hole in a penetrating way along the thickness direction of the printed circuit board; the second holes are circumferentially arranged around the first holes, and the third holes are arranged on one side, away from the first holes, of the second holes. The printed circuit board provided by the utility model meets the requirements of high-speed signal transmission on low loss and low crosstalk, and improves the integrity of high-speed signal transmission.
Description
Technical Field
The utility model relates to the technical field of signal transmission, in particular to a printed circuit board.
Background
With the rapid development of the current communication technology, the transmission rate is continuously improved, the requirements on the transmission rate and the other performances of the connectors are also higher and higher, and the matched connectors are also very important to the PCB packaging wiring design. At present, the high-speed connector is packaged under 10GHz and is generally designed by single differential pair and single reflow ground hole, even the reflow design of the ground hole shared by multiple differential pairs, the number of the reflow ground holes is gradually increased along with the increase of the speed, and the design of reference ground holes for non-crimping is gradually appeared except for the design of the reflow ground hole for crimping, so that the SI performance, namely the signal integrity, is improved. And the design of pressure welding signal in the package, the design of grounding hole and the design of reference grounding hole, the combination of the three designs of position and aperture design can be seen by the intelligence of the individual insert.
Accordingly, there is a need to provide a solution to meet the signal integrity requirements of 56GHz high-speed connectors.
Disclosure of Invention
The utility model aims to provide a printed circuit board so as to meet the requirements of high-speed signal transmission on low loss and low crosstalk.
In order to achieve the above purpose, the present utility model provides the following technical scheme:
a printed circuit board, wherein a first hole, a second hole and a third hole are formed in the printed circuit board in a penetrating manner along the thickness direction of the printed circuit board;
the second holes are circumferentially arranged around the first holes, and the third holes are arranged on one side, away from the first holes, of the second holes.
In some embodiments of the present utility model, the first hole is used for electrically connecting with a signal pin of a connector, the second hole is a reference ground hole, and the third hole is used for electrically connecting with a ground hole of the connector.
In some embodiments of the present utility model, the printed circuit board has a first direction and a second direction, and the first direction, the second direction and the thickness direction are perpendicular to each other;
the distance between the two first holes in the first direction is A 1 The spacing in the second direction is A 2 ，1.2mm<A 1 <1.4mm，A 2 <0.2mm；
The distance between the two third holes in the first direction is C 1 The spacing in the second direction is C 2 ，0.4mm<C 1 <0.6mm，0.5mm<C 2 <0.7mm。
In some embodiments of the utility model, a plurality of the second holes are arranged in a matrix along the first direction and the second direction.
In some embodiments of the present utility model, at least two of the second holes form a row in the first direction, and at least two rows of the second holes are arranged in parallel in the second direction.
In some embodiments of the present utility model, two rows of the second holes are arranged in parallel in the second direction, and the distance between the two rows of the second holes in the second direction is B 2 ，1mm<B 2 <1.1mm；
The number of the second holes in each row is three, the three second holes in each row are sequentially arranged along the first direction, and the distance between two adjacent second holes in the first direction is B1,1.1mm<B 1 <1.3mm。
In some embodiments of the utility model, at least one of the first and third holes is provided with a bonding pad.
In some embodiments of the utility model, the first hole has a diameter D 1 ，0.3mm<D 1 <0.32mm；
The aperture of the second hole is D 2 ，0.35mm<D 2 <0.37mm；
The aperture of the third hole is D 3 ，0.35mm<D 3 <0.37mm。
In some embodiments of the present utility model, a conductive portion is disposed on a surface of the printed circuit board, and the conductive portion is connected to the pad disposed on the first hole, and is used for conducting the first hole and the signal pin of the connector.
In some embodiments of the present utility model, the printed circuit board is provided with a plurality of repeating units, and each of the repeating units is arranged in a matrix in the first direction and the second direction;
the repeating unit comprises two of the first holes, five of the second holes and two of the third holes;
in the second direction, the spacing between two adjacent repeating units is P,4.3mm < P <4.6mm.
In some embodiments of the present utility model, the line width of the conducting portion is T,0.1mm < T <0.2mm:
in each repeating unit, each conducting part is respectively connected with the bonding pad on one first hole, and the distance between the two conducting parts is L, wherein L is 0.4mm < L <0.6mm.
Compared with the prior art, the technical scheme of the utility model has the following beneficial effects: the printed circuit board provided by the utility model meets the requirements of low loss and low crosstalk during high-speed signal transmission; specifically, the position distribution and the wire outlet positions of the differential signal holes, the grounding holes and the reference grounding holes are reasonably designed, so that the packaging of the printed circuit board meets the requirements of low loss and low crosstalk required by high-speed signal transmission, and the integrity of signal transmission is obviously improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a printed circuit board according to an embodiment of the present utility model;
FIG. 2 is a graph of insertion loss simulation of the printed circuit board of FIG. 1;
fig. 3 is a graph of a crosstalk simulation of the printed circuit board of fig. 1.
The main reference numerals in the drawings of the present specification are explained as follows:
01-a first direction; 02-a second direction;
1-a first hole; 2-a second hole; 3-a third hole;
4-bonding pads; 5-conducting part.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
The technical scheme of the utility model provides a printed circuit board, which is described in detail below. It should be noted that the following description order of the embodiments is not intended to limit the preferred order of the embodiments of the present utility model. In the following embodiments, the descriptions of the embodiments are focused on, and for the part that is not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
It should be noted that "perpendicular" in the present specification allows a deviation of ±10°, that is, in some embodiments, the angle between the first direction 01, the second direction 02, and the thickness direction is not necessarily 90 °, may be 90 ° ± 10 °, and may be 85 ° or 95 ° by way of example.
As shown in fig. 1, in some embodiments of the present utility model, a printed circuit board is provided with a first hole 1, a second hole 2 and a third hole 3 penetrating along a thickness direction thereof; the second holes 2 are circumferentially arranged around the first hole 1 to form shielding protection for the first hole 1, and the third hole 3 is arranged on one side of the second hole 2 away from the first hole 1. It will be appreciated that the above-described placement of the three through-holes reduces the impedance and cross-talk encountered during signal transmission, thereby improving the integrity of the signal transmission.
As shown in fig. 1, in some embodiments of the present utility model, the first hole 1 is used for electrically connecting with a signal pin of a connector, the second hole 2 is a reference ground hole, and the third hole 3 is used for electrically connecting with a ground hole of the connector. The printed circuit board provided by the utility model meets the requirements of low loss and low crosstalk during high-speed signal transmission; specifically, the position distribution and the wire outlet positions of the differential signal holes, the grounding holes and the reference grounding holes are reasonably designed, so that the packaging of the printed circuit board meets the requirements of low loss and low crosstalk required by high-speed signal transmission, and the integrity of signal transmission is obviously improved. Moreover, the printed circuit board provided by the utility model has good phase with the existing compression molding process, so that the printed circuit board has good production efficiency and high yield.
As shown in fig. 1, the present utility modelIn some embodiments of the utility model, the printed circuit board has a first direction 01 and a second direction 02, and the first direction 01, the second direction 02 and the thickness direction are perpendicular to each other; the distance between the two first holes 1 in the first direction 01 is A 1 The pitch in the second direction 02 is A 2 ，1.2mm<A 1 <1.4mm，A 2 <0.2mm; the distance between the two third holes 3 in the first direction 01 is C 1 The pitch in the second direction 02 is C 2 ，0.4mm<C 1 <0.6mm，0.5mm<C 2 <0.7mm. The design is beneficial to reducing crosstalk and impedance born in the signal transmission process, so that the integrity of signal transmission is improved, and the signal transmission quality is improved. It will be appreciated that A 1 、A 2 、C 1 C 2 The specific value of (2) can be selected and adjusted according to the actual requirement.
As shown in fig. 1, in some embodiments of the present utility model, a plurality of the second holes 2 are arranged in a matrix along the first direction 01 and the second direction 02. It will be appreciated that the second holes 2 as reference ground holes are arranged around the first holes 1 as differential signal holes in a matrix form, which can play a role in shielding and protecting the first holes 1, reduce signal crosstalk, and improve the integrity of signal transmission.
As shown in fig. 1, in some embodiments of the present utility model, at least two of the second holes 2 form a row in the first direction 01, and at least two rows of the second holes 2 are arranged in parallel in the second direction 02. The design is beneficial to reducing crosstalk and impedance born in the signal transmission process, so that the integrity of signal transmission is improved, and the signal transmission quality is improved.
In some embodiments of the present utility model, as shown in fig. 1, two rows of the second holes 2 are arranged in parallel in the second direction 02, and the distance between the two rows of the second holes in the second direction is B 2 ，1mm<B 2 <1.1mm; the number of the second holes in each row is three, the three second holes in each row are sequentially arranged along the first direction, and two adjacent second holes are arranged on the first holeThe spacing in the direction is B1,1.1mm<B 1 <1.3mm. The design is beneficial to reducing crosstalk and impedance born in the signal transmission process, so that the integrity of signal transmission is improved, and the signal transmission quality is improved. It will be appreciated that B 1 And B 2 The specific value of (2) can be selected and adjusted according to the actual requirement.
As shown in fig. 1, in some embodiments of the present utility model, at least one of the first hole 1 and the third hole 3 is provided with a pad 4 for soldering a wire or for soldering, thereby for signal transmission.
In some embodiments of the present utility model, as shown in FIG. 1, the first holes 1 have a diameter D 1 ，0.3mm<D 1 <0.32mm; the aperture of the second hole 2 is D 2 ，0.35mm<D 2 <0.37mm; the aperture of the third hole 3 is D 3 ，0.35mm<D 3 <0.37mm. The design is beneficial to reducing crosstalk and impedance born in the signal transmission process, so that the integrity of signal transmission is improved, and the signal transmission quality is improved. It will be appreciated that D 1 、D 2 、D 3 The specific value of (2) can be selected and adjusted according to the actual requirement.
As shown in fig. 1, in some embodiments of the present utility model, a surface of the printed circuit board is provided with a conductive portion 5, the conductive portion 5 is connected to the pad 4 provided on the first hole 1, and the conductive portion 5 is used to conduct the first hole 1 and a signal pin of the connector to mate with the connector and transmit a signal. The design is beneficial to reducing crosstalk and impedance born in the signal transmission process, so that the integrity of signal transmission is improved, and the signal transmission quality is improved.
As shown in fig. 1, in some embodiments of the present utility model, the printed circuit board is provided with a plurality of repeating units, and each of the repeating units is arranged in a matrix in the first direction 01 and the second direction 02; the repeating unit comprises two of the first holes 1, five of the second holes 2 and two of the third holes 3; in the second direction 02, the spacing between two adjacent repeat units is P,4.3mm < P <4.6mm. The design is beneficial to reducing crosstalk and impedance born in the signal transmission process, so that the integrity of signal transmission is improved, and the signal transmission quality is improved. It will be appreciated that the specific value of P may be selected and adjusted according to the actual requirements.
As shown in fig. 1, in some embodiments of the present utility model, the line width of the conducting portion 5 is T,0.1mm < T <0.2mm: in each repeating unit, each conducting part 5 is respectively connected with the bonding pad 4 on one first hole 1, and the distance between the two conducting parts 5 is L, wherein L is 0.4mm < L <0.6mm. The design is beneficial to reducing crosstalk and impedance born in the signal transmission process, so that the integrity of signal transmission is improved, and the signal transmission quality is improved.
It can be appreciated that in some embodiments of the present utility model, based on the differential signal with the aperture of 0.36mm, the package of the printed circuit board can meet the low-loss and low-crosstalk requirements required by the high-speed signal transmission including 56GHz, and the integrity of the signal transmission and the quality of the signal transmission are improved by the differential signal (i.e. the first hole 1) pitch design, the ground hole (i.e. the third hole 3) distribution design, the reference ground hole (i.e. the second hole 2) distribution design, and the wire-out (i.e. the conductive portion 5) design.
It is worth noting that some embodiments of the present utility model provide a printed circuit board with less than-50 db crosstalk at a 28GHz transmission rate.
Referring to fig. 2 and 3, fig. 2 is a simulation graph of insertion loss of a printed circuit board according to an embodiment of the present utility model, and fig. 3 is a simulation graph of crosstalk of the printed circuit board according to the embodiment; as can be seen from fig. 2 and 3, the loss of one press-connection via plus 3.5mm long wire is less than 2.5db, and the crosstalk at 28GHZ is less than-50 db, which can meet the requirement of the 56GHZ high-speed connector for signal integrity.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims. Furthermore, the foregoing description of the principles and embodiments of the utility model has been provided for the purpose of illustrating the principles and embodiments of the utility model and for the purpose of providing a further understanding of the principles and embodiments of the utility model, and is not to be construed as limiting the utility model.
Claims (11)
1. The printed circuit board is characterized in that a first hole, a second hole and a third hole are formed in the printed circuit board in a penetrating manner along the thickness direction of the printed circuit board;
the second holes are circumferentially arranged around the first holes, and the third holes are arranged on one side, away from the first holes, of the second holes.
2. The printed circuit board of claim 1, wherein the first hole is for electrically connecting with a signal pin of a connector, the second hole is a reference ground hole, and the third hole is for electrically connecting with a ground hole of the connector.
3. The printed circuit board of claim 2, wherein the printed circuit board has a first direction and a second direction, the first direction, the second direction, and the thickness direction being perpendicular to each other;
the distance between the two first holes in the first direction is A 1 The spacing in the second direction is A 2 ，1.2mm<A 1 <1.4mm，A 2 <0.2mm；
The distance between the two third holes in the first direction is C 1 The spacing in the second direction is C 2 ，0.4mm<C 1 <0.6mm，0.5mm<C 2 <0.7mm。
4. A printed circuit board according to claim 3, wherein a plurality of said second holes are arranged in a matrix along said first and second directions.
5. The printed circuit board of claim 4, wherein at least two of the second holes form a row in the first direction, and at least two rows of the second holes are arranged in parallel in the second direction.
6. The printed circuit board of claim 5, wherein two rows of said second holes are arranged in parallel in said second direction and the pitch of said two rows of said second holes in said second direction is B 2 ，1mm<B 2 <1.1mm；
The number of the second holes in each row is three, the three second holes in each row are sequentially arranged along the first direction, and the distance between two adjacent second holes in the first direction is B1,1.1mm<B 1 <1.3mm。
7. The printed circuit board of claim 6, wherein at least one of the first and third holes is provided with a land.
8. The printed circuit board of claim 7, wherein the first hole has a pore size D 1 ，0.3mm<D 1 <0.32mm；
The aperture of the second hole is D 2 ，0.35mm<D 2 <0.37mm；
The aperture of the third hole is D 3 ，0.35mm<D 3 <0.37mm。
9. The printed circuit board of claim 8, wherein a surface of the printed circuit board is provided with a conductive portion, the conductive portion being connected to the pad provided on the first hole, the conductive portion being for conductive connection between the first hole and a signal pin of the connector.
10. The printed circuit board of claim 9, wherein a plurality of repeating units are provided on the printed circuit board, each of the repeating units being arranged in a matrix in the first direction and the second direction;
the repeating unit comprises two of the first holes, five of the second holes and two of the third holes;
in the second direction, the spacing between two adjacent repeating units is P,4.3mm < P <4.6mm.
11. The printed circuit board of claim 10, wherein the line width of the via is T,0.1mm < T <0.2mm:
in each repeating unit, each conducting part is respectively connected with the bonding pad on one first hole, and the distance between the two conducting parts is L, wherein L is 0.4mm < L <0.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320748041.3U CN219499632U (en) | 2023-04-07 | 2023-04-07 | Printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320748041.3U CN219499632U (en) | 2023-04-07 | 2023-04-07 | Printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219499632U true CN219499632U (en) | 2023-08-08 |
Family
ID=87509857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320748041.3U Active CN219499632U (en) | 2023-04-07 | 2023-04-07 | Printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219499632U (en) |
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2023
- 2023-04-07 CN CN202320748041.3U patent/CN219499632U/en active Active
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