CN101739476A - Layout method of electromagnetic protection component of circuit board - Google Patents
Layout method of electromagnetic protection component of circuit board Download PDFInfo
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- CN101739476A CN101739476A CN200810178370A CN200810178370A CN101739476A CN 101739476 A CN101739476 A CN 101739476A CN 200810178370 A CN200810178370 A CN 200810178370A CN 200810178370 A CN200810178370 A CN 200810178370A CN 101739476 A CN101739476 A CN 101739476A
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Abstract
The invention discloses a layout method of an electromagnetic protection component of a circuit board, comprising the following steps: providing a layout of the circuit board; executing the layout boundary function in the first distance and generating first geometric lines with the attribute being layout boundary along the edge of the circuit board; resetting the attribute of the first geometric lines as layout prevention which can prevent layout operation in the geometry area encircled by the first geometric lines; executing the layout boundary function in the second distance and generating second geometric lines with the attribute being layout boundary along the edge of the circuit board; and carrying out filled layout operation on the circuit board, wherein the layout boundary attribute can prevent layout operation in the geometry area encircled by the second geometric lines.
Description
Technical field
The invention relates to a kind of layout method of circuit board, and particularly relevant for a kind of layout method of circuit board electromagnetic protection element.
Background technology
Along with the quick progress of science and technology, modern's life is indebted to the facility of electric equipment products, but also is in the environment of electromagnetic wave injection.Especially the electronic product of carrying or the communication product of high-frequency transmission, the electromagnetic radiation of itself are emitted in the surrounding environment easily, produce mutual interference mutually with the electronic product of vicinity, even also might cause damage to human body.Therefore, (electromagnetic interference, problem EMI) becomes important problem gradually relevant for anti-electromagnetic interference (EMI).
In circuit design, comprise that lead and circuit board etc. all can produce electromagnetic radiation, the layout circuit that the electromagnetic radiation meeting influences around the circuit may conduct the electromagnetic conductor of this class with all, and this situation just is called electromagnetic interference (EMI).Electromagnetic interference problem can see through good circuit design and circuit board wiring skill and solve, and just electromagnetic interference (EMI) is dropped to minimum through the method for design.
In circuit layout design now, can reduce electromagnetic interference (EMI) with ground connection, that is to say, will disturb signal to import earth terminal.And this ground connection to do rule be the layout slip-stick artist in manually mode, along monoblock printed circuit board (PCB) (Printed Circuit Board, PCB) edges of boards inner edge 20 mils (mil) locate to spread the Copper Foil (being commonly called as moat) of width 80 mil ground connection, as the electromagnetic protection element, and then reduce the influence of electromagnetic interference (EMI) with the Copper Foil of this ground connection to circuit board.Because the shape variation of printed circuit board (PCB) so utilize artificial mode to produce the Copper Foil of ground connection, will there be efficient very much.
Summary of the invention
The invention provides a kind of layout method of circuit board electromagnetic protection element, can accelerate to produce the electromagnetic protection component speeds by this, to reduce the influence that circuit board is subjected to electromagnetic interference (EMI).
The present invention proposes a kind of layout method of circuit board electromagnetic protection element, comprises the following steps.The layout of circuit board at first, is provided.Then, carry out the wiring boundary function with first distance, producing attribute with the edge along circuit board is first geometrical line of cloth line boundary.Afterwards, the attribute of first geometrical line is changed being made as wiring and preventing that wherein wiring prevents that attribute from can prevent to carry out wiring operations in the geometric areas that first geometrical line is surrounded.Then, carry out the wiring boundary function with second distance, producing attribute with the edge along circuit board is second geometrical line of cloth line boundary, and wherein cloth line boundary attribute can prevent to carry out wiring operations outside the geometric areas that second geometrical line is surrounded.Afterwards, the wiring operations that circuit board is filled up.
In one embodiment of this invention, above-mentioned layout method comprises also that attribute with first geometrical line changes and is made as the cloth line boundary.
In an embodiment of the present invention, above-mentioned is to carry out under program management (librarian) operating environment with the first distance execution wiring boundary function and with second distance execution wiring boundary function.
In an embodiment of the present invention, the attribute of above-mentioned first geometrical line changes to be made as to connect up to prevent it is to carry out under layout (layout) operating environment.
In an embodiment of the present invention, the layout method of foregoing circuit plate electromagnetic protection element also comprises the following steps.Enter the program management operating environment.The attribute of first geometrical line changed be made as first attribute.Carry out the layout boundary function with the 3rd distance, producing attribute along the edge of circuit board is the 3rd geometrical line of cloth line boundary.The attribute of the 3rd geometrical line changed be made as second attribute.Leave the program management operating environment, and enter the layout operating environment.The attribute of first geometrical line changed by first attribute being made as wiring and preventing.
In an embodiment of the present invention, above-mentioned first distance is greater than second distance, and second distance is identical with the 3rd distance.
In an embodiment of the present invention, above-mentioned first attribute is different with second attribute.
In an embodiment of the present invention, the foregoing circuit plate is a printed circuit board (PCB).
The present invention proposes the computer program that a kind of interior storage is used for layout, after computing machine loads computer program and carries out, can finish the layout method of foregoing circuit plate electromagnetic protection element.
The present invention is by setting first distance and the second distance on layout, and utilizes first distance and second distance to carry out the wiring boundary function respectively so that produce first geometrical line and second geometrical line along the edge of circuit board.Then, set the attribute of first geometrical line and second geometrical line, so that prevent from the geometric areas that first geometrical line is surrounded, to carry out wiring operations and prevent from outside the geometric areas that second geometrical line is surrounded, to carry out wiring operations.At last, the wiring operations that circuit board is filled up is just carried out " filling up " wiring operations, to produce the electromagnetic protection element outside the geometric areas that first geometrical line is surrounded and in the geometric areas that surrounded of second geometrical line.Thus, can reduce the layout slip-stick artist and depict the time that first geometrical line and second geometrical line and configuration electromagnetic protection element are spent, and this electromagnetic protection element can reduce the influence of electromagnetic interference (EMI) to circuit board in mode manually.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 illustrates the layout method process flow diagram into the board circuit protective element of one embodiment of the invention.
Fig. 2 illustrates the synoptic diagram into the circuit-board laying-out of one embodiment of the invention.
Fig. 3 illustrates the layout method process flow diagram into the board circuit protective element of one embodiment of the invention.
Embodiment
Fig. 1 illustrates the layout method process flow diagram into the circuit board electromagnetic protection element of one embodiment of the invention.Fig. 2 illustrates the layout into the circuit board of one embodiment of the invention.Please merge with reference to Fig. 1 and Fig. 2, at first, in step S101, provide layout Figure 200 of circuit board.
Then, in step S103, carry out electric design automation (Electronic DesignAutomation, EDA) " cloth line boundary " (routing outline) function in the instrument apart from d1 with first.In the present embodiment, electronic design automation tool can be " Mentor " layout program or other circuit layout program, but does not limit its scope.Behind completing steps S103, understanding the generation attributes along the edge 230 of circuit board be first geometrical line 210 of cloth line boundary, and the distance of first geometrical line 210 and board edge 230 is d1.For instance, inwardly obtain a measuring point, and the edge 230 of this measuring point and circuit board keeps first apart from d1 by the edge 230 of circuit board.Then, inwardly obtain a plurality of measuring point along the edge 230 of circuit board again, and each measuring point all keeps first apart from d1 with the edge 230 of circuit board.At last, in regular turn all measuring point are connected, to produce first geometrical line 210.
In step S105, the attribute of first geometrical line 210 changed being made as wiring and preventing (routing keepout), wherein wiring prevents that attribute from can prevent to carry out wiring operations in the geometric areas that first geometrical line 210 is surrounded.That is to say, when electronic design automation tool carries out circuit layout to circuit board, then can only outside the geometric areas that first geometrical line 210 is surrounded, carry out wiring operations.And this " wiring operations " may comprise coiling (routing), shop copper, configuration guide hole (via) or the like.
Afterwards, in step S107, carry out the wiring boundary function again with second distance d2.Therefore behind completing steps S107, having produced attribute along the edge 230 of circuit board is second geometrical line 220 of cloth line boundary, and the distance of second geometrical line 220 and board edge 230 is d2.Wherein, " cloth line boundary " attribute can prevent to carry out wiring operations outside the geometric areas that second geometrical line 220 is surrounded.That is to say, when electronic design automation tool carries out circuit layout at the layout Figure 200 to circuit board, then can only in the geometric areas that second geometrical line 220 is surrounded, carry out various wiring operations.In the present embodiment, first apart from d1 greater than second distance d2, and can be given voluntarily, and first for example be 100 mils (mil) apart from d1 by the user, second distance for example is 20 mils.In this step S107, the producing method of second geometrical line 220 can be as the producing method of first geometrical line 210, so do not repeat them here.
In step S109, the wiring operations that circuit board is filled up.Owing to carry out wiring operations outside the geometric areas that the attribute of first geometrical line 210 only allows to surround at it, but carry out wiring operations in the geometric areas that the attribute of second geometrical line 220 only allows to surround at it, therefore the wiring operations of " filling up " only can be to the area configurations conductive layer between first geometrical line 210 and second geometrical line 220, and conductive layer drawn be connected to earth terminal DGND, so that reduce the influence of electromagnetic interference (EMI) to circuit board as the electromagnetic protection element.In the present embodiment, the shop copper mode that the wiring operations that circuit board is filled up can utilize industry generally to be commonly called as, the Copper Foil that (that is " oblique line partly " among Fig. 2) spreads ground connection outside the geometric areas that first geometrical line 210 is surrounded and in the geometric areas that surrounded of second geometrical line 220 is as the electromagnetic protection element, and then reduces the influence of electromagnetic interference (EMI) to circuit board.Thus, present embodiment can reduce the layout slip-stick artist and carry out the time that the electromagnetic protection component placement is spent in mode manually.
At last, " oblique line partly " in Fig. 2 spreads after the Copper Foil of ground connection, can be again the attribute of first geometrical line 210 be changed and be made as the cloth line boundary, so that the layout slip-stick artist can carry out wiring in the geometric areas that is surrounded by first geometrical line 210, to continue to finish the circuit layout of circuit board.
For being had, this area knows that usually the knowledgeable can more understand the layout method as the circuit board electromagnetic protection element of present embodiment, below will lift an example again and illustrate.Fig. 3 illustrates the layout method process flow diagram into the circuit board electromagnetic protection element of one embodiment of the invention.The layout method of present embodiment can be applied to any electronic design automation tool, for example " Mentor " layout program etc.Please merge with reference to Fig. 2 and Fig. 3, at first, in step S301, enter program management (librarian) operating environment in the layout program.The program management operating environment also can be called component library management operations environment.Afterwards, at step S303, in the layout program, provide layout Figure 200 of circuit board.Then, carry out " cloth line boundary " function with first apart from d1.It is first geometrical line 210 of " cloth line boundary " that " cloth line boundary " function of layout program can be automatically produces attributes along the edge 230 of circuit board, and wherein " cloth line boundary " attribute can prevent that the layout program from carrying out wiring operations outside the geometric areas that first geometrical line 210 is surrounded.And the producing method of first geometrical line 210 can be with reference to the explanation of Fig. 1 embodiment, so do not repeat them here.
For circuit-board laying-out, each circuit board can only have a wiring boundary line.Therefore, if need on the circuit board originally when carrying out other wiring boundary function, that is produce and have second geometrical line of second distance, then need attribute with first geometrical line to change earlier and be made as other attribute.So, in step S305, the attribute of first geometrical line 210 changed by " cloth line boundary " be made as " first attribute ".Aforementioned " first attribute " can be other any attribute that is different from " cloth line boundary ", for example is " Path " (line footpath) attribute at this.First geometrical line 210 that changes to " Path " attribute can " layout " in the layout program (Layout) be carried out subsequent operation under the operating environment.
Then, in step S307, carry out " cloth line boundary " function with the 3rd once more apart from d3, thus the layout program can be again to produce attributes automatically along the edge 230 of circuit board be the 3rd geometrical line of " cloth line boundary ", wherein the distance at the edge 230 of the 3rd geometrical line and circuit board is d3.The producing method of the 3rd geometrical line can also be with reference to the explanation of first geometrical line 210, so do not repeat them here.
In step S309, the attribute of the 3rd geometrical line changed by " cloth line boundary " be made as " second attribute ".Aforementioned " second attribute " can be other any attribute that is different from " cloth line boundary ", for example is " Path " attribute at this.The 3rd geometrical line that changes to " Path " attribute can be carried out subsequent operation under ensuing layout operating environment.
Afterwards, enter among the step S311, carry out " cloth line boundary " function in the layout program once more with second distance d2, therefore the layout program is second geometrical line 220 of " cloth line boundary " along the edge 230 generation attributes of circuit board again, and wherein second geometrical line 220 is d2 with the distance at the edge 230 of circuit board.As mentioned above, " cloth line boundary " attribute can prevent that the layout program from carrying out wiring operations outside the geometric areas that second geometrical line 220 is surrounded.In the present embodiment, second distance d2 is identical apart from d3 with the 3rd, makes that the 3rd geometrical line is to be overlapped in second geometrical line 220 among Fig. 2.
After having produced first geometrical line 210, second geometrical line 220 and the 3rd geometrical line, enter step S313, that is leave the supervisory routine operating environment, and enter the layout operating environment.Then, in step S315, in the layout operating environment, the attribute of first geometrical line 210 changed by " Path " attribute be made as " wiring prevents " attribute.This " wiring prevents " attribute can prevent that " Mentor " layout program from carrying out wiring operations in the geometric areas that first geometrical line 210 is surrounded.
At last, in step S317, circuit board is carried out the wiring operations of " filling up ".In " Mentor " layout program, the wiring operations of aforementioned " filling up " can be " change to fill (DGND) " function.In " change to fill (DGND) " function, layer by layer circuit board shown in Figure 2 is filled up the conductive layer of ground connection by selecting the 3rd geometrical line.Owing to carry out wiring operations outside the geometric areas that the attribute of first geometrical line 210 only allows to surround at it, but carry out wiring operations in the geometric areas that the attribute of second geometrical line 220 only allows to surround at it, therefore the wiring operations of above-mentioned " filling up " only can dispose conductive layer to the zone between first geometrical line 210 and second geometrical line 220 (that is the 3rd geometrical line surrounded geometric areas), and this conductive layer drawn is connected to earth terminal.The annular conductive layer of the formed ground connection of step S317 can be as the electromagnetic protection element of circuit board, to reduce the influence of electromagnetic interference (EMI) to circuit board.Thus, present embodiment can reduce the time that generation electromagnetic protection component placement is spent.
The common skill person of the technical field of the invention can comply with its demand, and realizes the foregoing description in a kind of mode of computer program.This computer program is made up of a plurality of code segment basically, and these code segment can be finished the step of the layout method of foregoing circuit plate electromagnetic protection element in adding borne computer and after carrying out.Certainly, aforementioned computer program can also utilize computer-readable storage media to store it, carries out the layout method of foregoing circuit plate electromagnetic protection element in order to computing machine.
In sum, the present invention is by setting first distance and the second distance on layout, and utilizes first distance to carry out " cloth line boundary " function respectively with second distance so that produce first geometrical line and second geometrical line along the edge of circuit board.Then, set the attribute of first geometrical line and second geometrical line, so that prevent from the geometric areas that first geometrical line is surrounded, to carry out wiring operations and prevent from outside the geometric areas that second geometrical line is surrounded, to carry out wiring operations.At last, the wiring operations that circuit board is filled up is just carried out " filling up " wiring operations, to produce the electromagnetic protection element outside the geometric areas that first geometrical line is surrounded and in the geometric areas that surrounded of second geometrical line.Thus, can reduce the layout slip-stick artist and depict the time that first geometrical line and second geometrical line and configuration electromagnetic protection element are spent, and this electromagnetic protection element can reduce the influence of electromagnetic interference (EMI) to circuit board in mode manually.
Though the present invention discloses as above with embodiment; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is when with being as the criterion that claim was defined.
Claims (10)
1. the layout method of a circuit board electromagnetic protection element comprises:
The layout of one circuit board is provided;
Carry out a wiring boundary function with one first distance, producing attribute with the edge along this circuit board is one first geometrical line of cloth line boundary;
The attribute of this first geometrical line changed being made as wiring and preventing that wherein this wiring prevents that attribute from can prevent to carry out wiring operations in the geometric areas that this first geometrical line is surrounded;
Carry out this wiring boundary function with a second distance, producing attribute with the edge along this circuit board is one second geometrical line of cloth line boundary, and wherein this cloth line boundary attribute can prevent to carry out wiring operations outside the geometric areas that this second geometrical line is surrounded; And
This circuit board carried out the wiring operations of filling up.
2. the layout method of circuit board electromagnetic protection element as claimed in claim 1 is characterized in that, also comprises:
The attribute of this first geometrical line changed be made as the cloth line boundary.
3. the layout method of circuit board electromagnetic protection element as claimed in claim 1 is characterized in that, this first distance is greater than this two distance.
4. the layout method of circuit board electromagnetic protection element as claimed in claim 1 is characterized in that, carrying out this wiring boundary function and carry out this wiring boundary function with second distance with first distance is to carry out under the program management operating environment.
5. the layout method of circuit board electromagnetic protection element as claimed in claim 4 is characterized in that, the attribute of this first geometrical line is changed be made as wiring prevent it is to carry out under the layout operating environment.
6. the layout method of circuit board electromagnetic protection element as claimed in claim 1 is characterized in that, also comprises:
Enter a program management operating environment;
The attribute of this first geometrical line changed be made as one first attribute;
Carry out this layout boundary function with one the 3rd distance, producing attribute along the edge of this circuit board is one the 3rd geometrical line of cloth line boundary;
The attribute of the 3rd geometrical line changed be made as one second attribute;
Leave this program management operating environment, and enter a layout operating environment; And
In this layout operating environment, the attribute of this first geometrical line changed by this first attribute being made as wiring and preventing.
7. the layout method of circuit board electromagnetic protection element as claimed in claim 6 is characterized in that, this first distance is greater than this second distance, and this second distance is identical with the 3rd distance.
8. the layout method of circuit board electromagnetic protection element as claimed in claim 6 is characterized in that, this first attribute is different with this second attribute.
9. the layout method of circuit board electromagnetic protection element as claimed in claim 1 is characterized in that, this circuit board is a printed circuit board (PCB).
10. storage is used for the computer program of layout in one kind, after computing machine loads this computer program and carries out, can finish the layout method of the described circuit board electromagnetic protection of claim 1 element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101783709A CN101739476B (en) | 2008-11-27 | 2008-11-27 | Layout method of electromagnetic protection component of circuit board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101783709A CN101739476B (en) | 2008-11-27 | 2008-11-27 | Layout method of electromagnetic protection component of circuit board |
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| Publication Number | Publication Date |
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| CN101739476A true CN101739476A (en) | 2010-06-16 |
| CN101739476B CN101739476B (en) | 2012-08-08 |
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| CN2008101783709A Expired - Fee Related CN101739476B (en) | 2008-11-27 | 2008-11-27 | Layout method of electromagnetic protection component of circuit board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957847A (en) * | 2010-09-21 | 2011-01-26 | 百度在线网络技术（北京）有限公司 | Searching system and implementation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1536898A (en) * | 2003-04-11 | 2004-10-13 | 中兴通讯股份有限公司 | Back board arrangement method |
| CN100441067C (en) * | 2003-12-24 | 2008-12-03 | 上海贝岭股份有限公司 | An electromagnetic interference suppressive ground wiring method |
| CN101207967A (en) * | 2006-12-22 | 2008-06-25 | 英业达股份有限公司 | Circuit board structure capable of shielding interference of electromagnetic wave |
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2008
- 2008-11-27 CN CN2008101783709A patent/CN101739476B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957847A (en) * | 2010-09-21 | 2011-01-26 | 百度在线网络技术（北京）有限公司 | Searching system and implementation method thereof |
| CN101957847B (en) * | 2010-09-21 | 2011-11-23 | 百度在线网络技术（北京）有限公司 | Searching system and implementation method thereof |
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| Publication number | Publication date |
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| CN101739476B (en) | 2012-08-08 |
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Effective date of registration: 20180817 Address after: A2-3 Industrial Park, Tianjin Xiqing Economic Development Zone Patentee after: Tianjin Tai Wo Mau Electronics Co. Ltd. Address before: Taipei City, Taiwan Chinese Shilin District Hougang Street No. 66 Patentee before: Inventec Corporation |
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Granted publication date: 20120808 Termination date: 20201127 |