JP2645185B2 - Area pattern editing method for printed circuit board design CAD system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a printed circuit board design CA
The present invention relates to an area pattern editing method in the D system.

[0002]

2. Description of the Related Art A printed circuit board designer uses a printed circuit board design CAD system to create drawing data composed of a polygonal area pattern having an arbitrary shape, and transfers it to a manufacturing department. In the manufacturing department, an artwork film is generated from the passed drawing data, but at this time, a case may occur in which a product intended by a designer cannot be obtained. This is because the designer creates a fine pattern exceeding the resolution of the exposure apparatus. However, it is practically difficult to design a pattern in consideration of the resolution of an exposure apparatus. Therefore, it is the current situation that artwork films are modified in the manufacturing department.

[0003] The above points will be specifically described with reference to a conventional example shown in FIGS. 7 and 8. The graphic shown in FIG. 7 is created by a designer using a printed circuit board design CAD system. The polygon abcdef is an outer peripheral pattern of the area, and the square ghkm is a punching pattern of the area. From the printed circuit board design CAD system, polygon a
The coordinates of each vertex a, b, c, d, e, f of bcdef and the coordinates of each vertex g, h, k, m of the square ghkm are output as drawing data.

On the basis of the drawing data, an artwork film is set up in a manufacturing section. FIG. 8 shows the result. The lower right part of the figure is not as designed. This is because the width of this portion is smaller than the diameter of the aperture of the exposure apparatus, as shown in FIG. In the manufacturing section, the portion that has been exposed extra, that is, the region n in FIG.
Modify the artwork film by manually painting the stc and area eduv.

[0005]

A conventional printed circuit board design CAD system has the following problems. (1) When a printed circuit board designer creates a fine pattern exceeding the resolution of an exposure apparatus, there is no function for checking the fine pattern, so that an artwork film as intended by the designer cannot be obtained in the manufacturing department.

(2) Manually modifying an artwork film in a manufacturing section causes an increase in the number of manufacturing steps and lowers product reliability. (3) Manual work in the manufacturing department is based on printed circuit board design CAD
It hinders the linkage between the system and the PCB automation system.

The present invention solves these problems, eliminates the need for manual modification in the manufacturing department, reduces the number of manufacturing steps, improves reliability, and supports full automation of manufacturing steps. Printed circuit board design CA
An object of the present invention is to provide an area pattern editing method in the D system.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a printed circuit board design CAD system for editing a polygonal area pattern having an arbitrary shape formed on a printed circuit board. An unprintable area determination unit is provided for detecting whether there is an area pattern that cannot be printed on the artwork film, and deleting the area pattern if it exists. It comprises a directed offset side calculation unit, an intersection coordinate calculation unit, a directed closed loop calculation unit, a directed closed loop comparison unit, and a closed loop deletion unit. The directed offset side calculation unit calculates, from each side constituting the polygonal area pattern, Opposite to each other by a distance of half the artwork drawing line width, inside if the polygon area pattern is the outer circumference, and outside if the polygon area pattern is punched. A directed offset side having a direction is calculated, an intersection coordinate calculator calculates coordinates of a point where each offset side intersects each other, and a directed closed loop calculator connects the intersections of the offset sides and punches the outer peripheral pattern. The closed loops with opposite directions are calculated for the pattern and the directed closed loop comparison unit determines whether there is a closed loop with the punching pattern direction outside the closed loop with the outer pattern direction. The closed loop deleting unit is configured to delete the closed loop having the punching pattern direction existing outside the closed loop having the outer peripheral pattern direction, which is determined by the directional closed loop comparing unit.

FIG. 1 is a diagram showing the principle of the present invention. In the figure, reference numeral 10 denotes a drawing data editing unit, reference numeral 20 denotes drawing data, reference numeral 30 denotes a non-printable area determination unit, reference numeral 31 denotes a directed offset side calculation unit, reference numeral 32 denotes an intersection coordinate calculation unit, reference numeral 33 denotes a directed closed loop calculation unit, and reference numeral 34 Is a directed closed loop comparison unit, 35 is a closed loop deletion unit, and 40 is manufacturing data.

The area pattern editing method in the printed circuit board design CAD system according to the present invention is based on
Is applied to the non-printable area determination unit 30 to detect and delete in advance a non-printable area exceeding the resolution of the exposure device for producing an artwork film. The designer re-edits the drawing data in consideration of this result, and applies the data again to the drawing impossible area determination unit 30. This operation is repeated until the unprintable area determination unit 30 no longer detects the unprintable area. The non-printable area determination unit 30 outputs the manufacturing data 40 when the non-printable area is not detected.

In the manufacturing section, based on the manufacturing data 40,
Without modification, an artwork film can be produced as intended by the designer. If the PCB automation system is established, the manufacturing data 4
By pouring 0 directly, it becomes possible to commercialize the product without human intervention.

[0012]

The principle of the present invention will be described with reference to FIG. The drawing data 20 edited by the drawing data editing unit 10 is input to the non-printable area determination unit 30.

The unprintable area determination unit 30 performs the following processing on the input drawing data 20. The directed offset side calculation unit 31 calculates an offset side having a direction at a position separated by a half of the artwork drawing line width from each side constituting the polygonal area pattern. The position is set inside when the polygon area pattern is the outer periphery, and outside when the polygon area pattern is punching. The orientation is set so that the outer peripheral pattern and the punching pattern are opposite to each other.

The intersection coordinate calculator 32 calculates coordinates of points where the offset sides calculated by the directed offset side calculator 31 intersect each other. Directed closed loop calculator 33
Connects the intersection points of the offset sides calculated by the intersection coordinate calculation unit 32, and calculates a closed loop having opposite directions in the outer peripheral pattern and the punching pattern.

The directed closed loop comparison unit 34 determines whether or not there is a closed loop having a punching pattern direction outside the closed loop having a peripheral pattern direction. If there is no corresponding closed loop, the production data 40 is output. The closed-loop deleting unit 35 performs the directed closed-loop comparing unit 3
The closed loop having the direction of the punching pattern existing outside the closed loop having the direction of the outer peripheral pattern determined in step 4 is deleted as a non-printable area.

The result data is re-edited by the drawing data editing unit 10. After that, the drawing data 20 is again input to the drawing impossible area determination unit 30. The above operation is repeated until the unprintable area determination unit 30 no longer detects the unprintable area.

[0017]

An embodiment of the present invention will be described with reference to FIGS. FIG. 2 shows an area pattern targeted by this embodiment. The polygon abcdef is an outer peripheral pattern of the area,
The square ghkm is a punching pattern of the area. The lower right part of the figure is a non-printable area because its width is smaller than the diameter of the aperture of the exposure apparatus. Hereinafter, the process of editing an area pattern according to the present invention will be described using this as drawing data.

[Process 1, FIG. 3] A directional offset side is calculated at a position separated from each side constituting the polygonal area pattern by a half of the artwork drawing line width (diameter of the aperture). The position is set inside the outer peripheral pattern and outside the punching pattern. The orientation is set so that the outer peripheral pattern and the punching pattern are opposite to each other. Here, the outer peripheral pattern is set in the counterclockwise direction, and the punching pattern is set in the clockwise direction.

[Process 2, FIG. 3] The coordinates of the points where the offset sides intersect each other are calculated. Specifically, as shown in the figure, the intersections a ′, b ′, c ′, d ′,
e ′, p, and f ′, intersection g ′ of the punch offset side,
Calculate h ′, k ′, and m ′.

[Process 3, FIG. 4] The intersections of the directed offset sides are connected, and a closed loop having opposite directions in the outer peripheral pattern and the punching pattern is calculated. Specifically, as shown in the figure, the outer peripheral closed loop a ′ having a counterclockwise direction
b ′ → p → f ′ → a ′, punched closed loop g ′ → h ′ → k ′ → m ′ → g ′ with clockwise rotation, and punched closed loop e ′ with clockwise rotation → p → c '→ d' →
e ′ is calculated.

[Process 4, FIG. 4] It is determined whether or not there is a punching closed loop having a clockwise direction in addition to an outer peripheral closed loop having a counterclockwise direction. In the case of FIG. 4, the outer peripheral closed loop a ′ → b ′ → p → f ′ having the direction of counterclockwise rotation
In addition to → a ′, there is a punched closed loop e ′ → p → c ′ → d ′ → e ′ having a clockwise direction.

[Process 5, FIG. 4, FIG. 5] The closed punching loop e ′ → p → c ′ → d ′ → e ′ detected in process 4 is deleted. [Process 6, FIG. 5, FIG. 6] Outer circumference closed loop a ′ → b ′ → p → f ′ → a ′ having counterclockwise rotation and punching closed loop g ′ → h ′ → having clockwise rotation k '→ m'
→ Based on g ′, an area pattern composed of the outer peripheral pattern abqfa and the punching pattern ghhmkg is calculated. As shown in FIG.
The cdeq is deleted, and only the area pattern that can be drawn remains.

Through the above processing, new drawing data in which the non-printable area is deleted from the input drawing data is obtained. Based on this, the designer re-edits the drawing data. Then, the processing of the present invention is performed again on the re-edited drawing data. This operation is repeated until an unprintable area is no longer detected. When the unprintable area is no longer detected, the drawing data is passed to the manufacturing department as manufacturing data.

In the manufacturing section, an artwork film as intended by the designer can be generated from the manufacturing data without any modification. When a printed circuit board manufacturing automation system has been established, it is possible to commercialize the product without manual intervention by directly flowing manufacturing data.

[0025]

According to the present invention, manual modification in the manufacturing section is not required, so that the number of manufacturing steps can be reduced and the reliability of the product is improved. Further, it can easily cope with full automation of a printed circuit board manufacturing process.

[Brief description of the drawings]

FIG. 1 is a diagram showing the principle of the present invention.

FIG. 2 is a diagram showing one embodiment (No. 1) of the present invention.

FIG. 3 is a diagram showing an embodiment (part 2) of the present invention.

FIG. 4 is a diagram showing an embodiment (part 3) of the present invention.

FIG. 5 is a diagram showing an embodiment (part 4) of the present invention.

FIG. 6 is a diagram showing an example (part 5) of the present invention.

FIG. 7 is a diagram showing a conventional example (part 1).

FIG. 8 is a diagram showing a conventional example (part 2).

[Explanation of symbols]

 Reference Signs List 10 drawing data editing unit 20 drawing data 30 non-printable area determination unit 31 directed offset side calculation unit 32 intersection coordinate calculation unit 33 directed closed loop calculation unit 34 directed closed loop comparison unit 35 closed loop deletion unit 40 manufacturing data

Claims (1)

(57) [Claims] In a printed circuit board design CAD system for editing a polygonal area pattern having an arbitrary shape formed on a printed circuit board, an area pattern which cannot be drawn on an artwork film exists in drawing data. A non-printable area determining unit for detecting whether or not the area exists, and deleting the area if it is present, comprising a directed offset side calculating unit, an intersection coordinate calculating unit, and a directed closed loop calculating unit , A directed closed-loop comparison section, and a closed-loop deletion section. The directed offset side calculation section separates the polygon area pattern from each of the sides constituting the polygon area pattern by a distance of half the artwork drawing line width. Directed offset sides having directions opposite to each other are calculated on the inner side in the case of the outer periphery and on the outer side in the case of the punching of the polygonal area pattern. Calculates the coordinates of the points where the offset sides intersect each other, and the directed closed loop calculation unit connects the intersections of the offset sides and calculates closed loops having opposite directions in the outer peripheral pattern and the punching pattern. The directed closed loop comparator determines whether there is a closed loop having the punching pattern direction outside the closed loop having the outer peripheral pattern direction, and the closed loop deletion unit has been determined by the directed closed loop comparator. A region pattern editing method in a printed circuit board design CAD system, wherein a closed loop having a punching pattern direction existing outside a closed loop having a peripheral pattern direction is deleted.