JPH05216964A - Wiring modification system on printed circuit board - Google Patents

Abstract

PURPOSE:To provide a wiring modification system which is capable of easily modifying wiring, which require quite short time for the modification of the wiring, and by which such an error section can be found in all case. CONSTITUTION:A wiring route search means 1 follows up a wiring route of each circuit from plural circuits by means of a computer. An electric influence calculation means 2 calculates in a numeric value and seeks various kinds of adverse electrical influences of the respective wiring routes searched by the wiring route search means 1 on the other adjacent wirings. A shield pattern insertion means 3 inserts a shield wiring which is electrically stable, has an ability of blocking the electrical influence and which does not have an external effect into the clearance between the wiring sections in which a preliminarily set allowance value is exceeded by the value obtained by the electrical influence calculation means 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring correction method when adjacent wirings electrically affect each other in a circuit design on a printed circuit board.

[0002]

2. Description of the Related Art Generally, a complicated circuit design on a printed circuit board is performed on a computer screen. Conventionally, a wiring section (hereinafter referred to as an error section) that has an electrical adverse effect on another wiring is found in the wiring path of the circuit by searching the wiring path for identifying one circuit from a large number of circuit patterns. In this case, after the search process is completed, the positions of the circuit patterns and wirings are corrected on the screen of the computer.

[0003]

In the above-mentioned conventional method, it is not easy to correct the wiring, it takes time to correct the wiring, and it may be impossible to find such an error section. There is.

Therefore, an object of the present invention is to provide a wiring correction method in which the wiring can be easily corrected, the wiring can be corrected in a short time, and such an error section cannot be found. To do.

[0005]

According to the present invention, a wiring section that electrically affects adjacent wirings is searched from a large number of wirings, and the electrical effect is cut off between the wirings in this section. It is possible to obtain a wiring correction method on a printed circuit board, which is characterized in that a wiring for a shield is inserted.

Further, according to the present invention, the route of the wiring is traced for all the circuits, and the electrical influence between the wirings adjacent to each route is calculated, and the electrical influence between the wirings exceeding the preset allowable value is calculated. A wiring correction method on a printed circuit board is obtained, which is characterized in that a wiring for a shield that does not function except for stably blocking the electrical influence is inserted.

Further, according to the present invention, the route of the wiring is searched for all the circuits, and the electrical influence between the adjacent wirings is calculated for each route, and the electrical influence exceeding the preset allowable value is calculated. Is it possible to find out the wiring section that has it, extract one wiring section from it, and insert a shield wiring that does not function except that the spacing between the wiring in that section is electrically stable and cuts off the electrical influence? Whether or not it is possible, insert the shield wiring, but if it is not possible, partially widen the mutual intervals in the wiring section and insert the shield wiring. A wiring correction method on a printed circuit board characterized by the following is obtained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a wiring method for an electric circuit according to this embodiment. In FIG. 1, reference numeral 1 is a wiring route searching means, which follows a wiring route of each circuit from a large number of circuits by using a computer as in the conventional case. The electrical effect calculation means 2 calculates and derives various electrical adverse effects on other wirings adjacent to each wiring path searched by the wiring path searching means 1 as numerical values. The shield pattern inserting means 3 is electrically stable in the gap between the wiring sections where the numerical value calculated by the electric influence calculating means 2 exceeds a preset allowable value, and the electric influence is A shield wiring (hereinafter referred to as a shield pattern) that has a function of blocking and does not exert any external action is inserted.

FIG. 2 is a flow chart of the wiring method of the electric circuit of this embodiment. In FIG. 2, in step 10, the wiring paths of all circuits are searched. In step 11,
The electrical influence on other circuits is calculated for all the searched wiring paths. In step 12, it is judged whether or not there is an error section, and if there is no error section, the entire processing is ended. Step 12 is to determine the error section.
The electrical influence calculated in step 1 is compared with a preset allowable value, and it is determined whether or not it exceeds this.

At step 13, it is judged whether or not the correction processing has been performed for all the error sections, and if the correction processing has been performed, the entire processing is ended. In step 14, one error section is extracted from the confirmed error sections as a target of the correction process. In step 15, it is determined whether or not there is an interval required to insert the shield pattern between the extracted one error section and another wiring section which is electrically affected by this section.

When it is determined in step 15 that there is an interval for inserting the shield pattern, in step 16 the shield pattern is inserted between one error section and another wiring section. When it is determined in step 15 that there is no shield pattern insertion interval, in step 17, wiring is performed separately for the error section and other wiring sections. Step 1
In step 18, the shield pattern is inserted into the insertion space formed by the pressed wiring in 7. Step 18
In step 19, the electrical influence is recalculated for the wiring moved by the pressed wiring in. After this, step 1
Returning to step 3, it is judged whether the correction processing of the error section is necessary, and thereafter, the above procedure is repeated until all the error sections are corrected.

When inserting the shield pattern, as shown in FIG. 3 (A), wirings 22 and 23 are provided between the wiring prohibiting regions 20 and 21 facing each other with a space therebetween, and the space between the two is provided. Is relatively wide, the same figure (B)
As shown in FIG.
4 is inserted. However, as shown in FIG. 4 (A), when a large number of wirings pass between the wiring prohibited areas 25 and 26, the distance between the wirings 25 and 26 therein is relatively small. Is the wiring 2 as shown in FIG.
The insertion space is secured by shifting the positions of the wirings 5 and 26 together with the surrounding wiring and pushing them separately. That is, the insertion space does not necessarily have to be vacant over the entire range of the error section, and it is sufficient if the electrical influence is within the allowable value.

[0014]

As described above, according to the present invention, a wiring section that electrically influences an adjacent wiring is searched from a large number of wirings, and the wirings in this section are electrically stable. Since a method for inserting a shield wiring that does not function other than blocking the electrical effect is adopted, it is possible to block the electrical adverse effect that occurs between the wirings by the shield pattern, which may adversely affect other circuits. There is no error, the error section can be completely found and corrected, the quality of the printed circuit board can be improved, and there is no change in the wiring position to correct the error section, so there is no substantial change in the circuit pattern. Therefore, the work can be easily performed, and the time required for this can be shortened.

[Brief description of drawings]

FIG. 1 is a block diagram showing a wiring correction method on a printed circuit board according to the present invention.

FIG. 2 is a flow chart for explaining a wiring correction method on a printed circuit board according to the present invention.

FIG. 3A is a schematic view showing a wiring state before correction according to one embodiment of the present invention, and FIG. 3B is a schematic view showing a wiring state after correction according to one embodiment of the present invention. It is a figure.

FIG. 4A is a schematic view showing a wiring state before correction according to another embodiment of the present invention, and FIG. 4B shows a wiring state after correction according to another embodiment of the present invention. It is a schematic diagram showing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wiring route searching means 2 Electric effect calculation means 3 Shield pattern inserting means 20 Wiring prohibited area 21 Wiring prohibited area 22 Wiring 23 Wiring 24 Shield pattern 25 Wiring prohibited area 26 Wiring prohibited area 27 Wiring 28 Wiring 29 Shield pattern

Claims (3)

[Claims] 1. A search is made for a wiring section that electrically affects adjacent wirings from a large number of wirings, and a wiring for shielding that blocks the electrical effect is inserted between the wirings in this section. A characteristic wiring correction method on the printed circuit board. 2. A wiring route is traced for all circuits, and an electrical influence between adjacent wiring lines is calculated for each route to electrically stabilize the wiring between wiring lines exceeding a preset allowable value. A wiring correction method on a printed circuit board, which inserts a wiring for a shield that does not function except for blocking the physical influence. 3. A wiring route is searched for for all circuits, an electrical influence between adjacent wirings is calculated for each route, and a wiring section having an electrical influence exceeding a preset allowable value is found, Extract one wiring section in it, and judge whether it is possible to insert a shield wiring that does not function except that the distance between the wirings in that section is electrically stable and cuts off the electrical influence, If possible, insert the wiring for shielding, but if not possible, partially widen the mutual distance in the wiring section and insert the wiring for shielding to make it less than the allowable value. Wiring correction method on the printed circuit board.