JP2878740B2 - Printed circuit board mask drawing method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method and an apparatus for drawing a printed circuit board mask using a CAD / CAM system.

[Conventional technology]

Conventionally, when creating a printed circuit board mask,
As described in -44580, drawing is performed using a CAD / CAM system. In this case, the pattern of the printed circuit board mask is input to the drawing device using the screen of the digitizer or the graphic processing terminal. May be divided into a plurality of figures to perform an input operation. This is because the division into a plurality of pieces can improve the operability at the time of input.

For example, as shown in FIG. 6, the vertices are input as three sets of patterns surrounded by a contour drawing locus 16 formed by an aperture 15.

[Problems to be solved by the invention]

However, when such a divided pattern is input, each divided drawing is regarded as an independent drawing pattern and drawn. For this reason, the roundness due to the diameter of the aperture 15 forming the apex of each divided pattern may cause the pattern to be narrowed at both ends of the contact portion of each divided pattern, and a slit may be generated at the contact portion. For example, when the part A in FIG. 6 is enlarged and shown in FIG.
At the end of the contact portion between the trajectories 16, the pattern thinning 17 occurs, and the slit 18 due to the imperfect contact of the trajectory 16 occurs. When the pattern thinning or the slit occurs, the quality of the printed circuit board mask is deteriorated.

In order to solve this problem, for example, as shown in FIG. 8, it is conceivable to provide a graphic overlap portion 24 at the contact portion of each of the divided patterns 21, 22, and 23 when dividing the paint-out pattern into a plurality. Can be However, if such an overlapping portion is provided, the input operation of the division pattern becomes very troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an apparatus for printing a printed circuit board mask, which can easily and quickly draw a printed circuit board mask without causing pattern narrowing or slitting.

[Means for solving the problem]

The above object is achieved by dividing a printed circuit board mask as a drawing target into a plurality of figures and sequentially obtaining the figures as position coordinate data defining a relative positional relationship between the figures and a figure shape. From the coordinate data, the connection relationship between the figures is recognized, and for a plurality of figures in the connection relation, the plurality of figures are synthesized based on the position coordinate data corresponding to the figure, so that the contour drawing trajectory is obtained. This is achieved by creating composite graphic data in a state in which is continuously connected, and then generating print board mask drawing data including at least contour drawing data from the composite graphic data. In addition, as an apparatus configuration, as a constituent element, a connection relationship between figures is recognized from position coordinate data, and a plurality of figures in the connection relation are synthesized based on the position coordinate data corresponding to the figure, thereby forming an outline. A graphic synthesizing unit for generating synthetic graphic data in a state where drawing loci are continuously connected, and mask drawing data generation for generating printed circuit board mask drawing data including at least contour drawing data from the synthetic graphic data from the graphic synthesizing unit And at least a part.

[Action]

Since the contour of the pattern is drawn from the composite figure, a contact portion is not generated unlike the case where the contour is drawn individually for each divided figure, and the occurrence of pattern thinning and slits is prevented.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a diagram showing the entire configuration of a drawing apparatus, in which 1 is a digitizer (a tablet type graphic input device for digitally detecting position coordinates at each point on a graphic,
Numeral 2 denotes a graphic processing terminal, and a drawing pattern data input from the digitizer 1 or the graphic processing terminal 2 is used to input a drawing pattern input unit 5 of a drawing apparatus 10 composed of a CAD / CAM system.
To supply. The fill pattern data obtained from the input unit 5 is temporarily stored in the pattern data memory 3 and then supplied to the fill pattern combining unit 6. The paint-out pattern synthesizing unit 6 performs a synthesizing process of a group of connected patterns which are divided and input to the input unit 5, and obtains contour data of the synthesized pattern. The outline data of the composite pattern is temporarily stored in the pattern data memory 4 and then supplied to the drawing pattern mask drawing data creating unit 7, where a printed board mask is drawn as a set of figures. Then, the printed circuit board mask data created by the painting pattern mask creation data creation unit 7 is supplied to a photo plotter creation data storage unit 8.
A printed circuit board mask is created by a predetermined process.

Next, the operation when drawing a printed circuit board mask by this drawing apparatus will be described. For example, assuming a case where a filling pattern 11 shown in FIG. 2 is formed,
In this case, as shown in FIG. 3, the figure is divided into figures 12, 13, and 14, and the digitizer 1 or the figure processing terminal 2 inputs the figure to the filling pattern input unit 5. The data of the divided figures 12, 13, and 14 (specifically, the relative positional relationship between the figures 12, 13, and 14 and the position coordinate data that defines the shape of each of the figures 12, 13, and 14) are filled. The data is supplied to the pattern synthesizing section 6. In the fill-up pattern synthesizing section 6, the connection relationship between the figures 12, 13, and 14 (more specifically, the overlap / side contact Relationship)
By recognizing the presence / absence of a pattern, it is first known that the figures 12, 13, and 14 are a continuous pattern group,
As shown in the figure, synthetic figure data composed of a contour drawing locus 16 having vertices formed as apertures 15 can be obtained easily and quickly. In this case, data is created in the composite figure so that pattern thinning and generation of slits are eliminated. Then, based on the composite figure data, the paint pattern mask drawing data creation unit 7 obtains paint pattern data (specifically, mainly contour drawing data) of the printed circuit board mask.

By forming the printed circuit board mask in this way, the contour drawing locus 16 is not set at the contact portion of each divided figure, and the thinning of the pattern and the generation of the slit at the contact portion are eliminated. Therefore, the printed circuit board mask produced according to this example is of high quality without pattern thinning and slits. Also, the input operation of the divided figure can be easily performed without the necessity of the overlapping processing of the divided figure.

FIG. 5 shows an example of a wet-out pattern of a printed circuit board created according to this embodiment. In FIG. 5, reference numeral 30 denotes a squeezing pattern. In the case of such a complicated pattern, a particularly great effect is obtained.

〔The invention's effect〕

According to the present invention, since the divided figures are synthesized at the stage of creating the mask drawing data, the occurrence of pattern thinning and slits can be prevented, and the mask quality can be improved and the design efficiency can be improved by facilitating the input operation.

[Brief description of the drawings]

FIG. 1 is a block diagram of a drawing apparatus showing one embodiment of the present invention, FIGS. 2, 3 and 4 are drawings for explaining the embodiment, and FIG. 5 is an example of a printed circuit board mask. FIGS. 6, 7, and 8 are views for explaining a conventional drawing method. 5: paint pattern input unit, 6: paint pattern combining unit, 7 paint pattern mask drawing data creation unit, 11 paint pattern, 12, 13, 14 ...
Divided figure, 15 ... Aperture, 16 ... Outline drawing locus.

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Kenji Ochi 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Pref. 64-44580 (JP, A) JP-A-63-245772 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G06F 17/50

Claims (2)

(57) [Claims] 1. A method of drawing a printed circuit board mask for drawing a printed circuit board mask as a result of synthesizing a plurality of figures, wherein a printed board mask to be drawn is divided into a plurality of figures, and each of the figures is divided into a plurality of figures. Are sequentially obtained as position coordinate data that defines the relative positional relationship between the figures and the figure shape, the connection relation between the figures is recognized from the position coordinate data, and a plurality of figures having the connection relation are recognized. With regard to the above, the plurality of figures are synthesized based on the position coordinate data corresponding to the figures, thereby generating synthesized figure data in a state where the contour drawing trajectory is continuously connected in a continuous manner. A method of drawing a printed circuit board mask, wherein printed circuit board mask drawing data including contour drawing data is created. 2. A printed circuit board mask as a drawing object is divided into a plurality of figures, and each of the figures is sequentially input as position coordinate data defining a relative positional relationship between the figures and a figure shape. A printed circuit board mask drawing apparatus for drawing a printed circuit board mask as a result of combining a plurality of figures by being processed, the connection relationship between the figures being recognized after the connection relation between the figures is recognized from the position coordinate data. By combining a plurality of figures based on the position coordinate data corresponding to the figures, a figure combining unit that creates combined figure data in a state where the contour drawing trajectory is continuous in a continuous manner, and a combined figure data from the figure combining unit. And a mask drawing data creating unit for creating printed circuit board mask drawing data including at least the contour drawing data. Configuration, drawing apparatus of the printed circuit board mask.