JPH0756978A - Cad system for printed circuit board - Google Patents

Abstract

PURPOSE:To generate CAD data for printed circuit board with high reliability and to reduce man-hours when contour data designed by a mechanical CAD system, etc., is fetched in a CAD system for printed circuit board. CONSTITUTION:The CAD system for printed circuit board equipped with an input means for the contour data 1, a means which converts the contour data 1 into CAD data 3 for paint-out printed circuit board using at least one kind of data out of line segment data with width, circular arc data with width, and position data with width by applying paint-out processing 2 to an area paragraphed by the contour data 1, and a means which edits 4 paint-out data is used. A concrete paint-out method is performed by converting the contour data 1 of a graphic into closed-loop data, thence, supplying recognition for central-painting to the closed-loop data, then, deciding a paint-out direction. After that, when a part requiring a central void in the inside of the graphic exists, the central void is formed in the data by supplying recognition for central void.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a CA for printed wiring boards.
The present invention relates to the D system, and particularly to mechanical CAD.
CAD data created for drawings by the system,
It is used when processing as CAD data of a printed wiring board.

[0002]

2. Description of the Related Art In a CAD system for printed wiring boards,
In general, line segment data with width (hereinafter referred to as line data), arc data with width (hereinafter referred to as arc data), and position data with width (hereinafter referred to as flash data) are CAD data rather than contour data. To use as.

This is because, when a pattern in which a plurality of pads for mounting surface-mounting components as shown in FIG. 5 are lined up is represented by CAD data, if line data is used, one pad can be represented by one line data. It can be expressed, and editing operations such as moving the pattern and changing the pattern width can be performed by changing the coordinates of one line data and changing the width of the line data. However, if expressed by contour data, two line segment data and two arc data are required for each pad, and movement of this pattern,
For editing work such as changing the pattern width, it is necessary to correct all two line segment data and two arc data, and in terms of data amount and editing work efficiency, the contour data is stored in the CAD system for the printed wiring board. Is not suitable for.
In addition, mask film drawing machines (photo plotters, laser plotters, etc.) used in the manufacture of printed wiring boards (circuit formation, solder resist film formation, etc.) cannot input contour data, and line data, arc Since data and flash data are input and a mask film for manufacturing a printed wiring board is drawn, the contour data is not suitable for a printed wiring board CAD system in terms of such a printed wiring board manufacturing data output. .

On the other hand, in the mechanical CAD system, the mechanical parts or the entire device is designed, and the purpose is to output drawings, output N / C data for mold making, etc.
When a printed wiring board is designed by an AD system, the obtained data is usually contour data. Then, an electronic device manufacturer who handles a printed wiring board as one of the mechanical parts has a complicated system management and data management due to the mixture of the printed wiring board CAD system and the mechanical CAD system. CA
Mechanical CAD without using the CAD system for printed wiring boards due to reasons such as cost problems due to the introduction of the D system.
The printed wiring board is often designed by the system.

Therefore, when a printed wiring board manufacturer conventionally manufactures a printed wiring board based on contour data designed by a mechanical CAD system or the like, as described above, it is generally used for printed wiring boards. Since the CAD system does not handle contour data, CA for printed wiring boards
To input data to the D system, after reading the contour data, re-input the data with a mouse, tablet, etc. while observing the paper drawing drawn by the drawing device, or set the paper drawing on the digitizing device. ,
I had no choice but to perform digitizing work such as inputting data by hitting on the drawing. Regardless of which of these means is adopted, a large amount of man-hours are required for the CAD operator for the printed wiring board to input based on the drawing once output on paper, and moreover, due to erroneous input or omission of input. The reliability of the data may be reduced.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and the problem to be solved is that a printed wiring board manufacturer has a mechanical system C.
When a printed wiring board is manufactured based on contour data designed by an AD system or the like, C for printed wiring board is used.
In order to input data to the AD system, it is necessary to read the contour data and perform the digitizing work while looking at the paper drawing drawn by the drawing device, which requires a great number of man-hours, and also erroneous input and omission of input. That is, the reliability of data may be reduced.

The object of the present invention is to eliminate the above-mentioned problems of the prior art and improve the mechanical CAD.
A CAD system for a printed wiring board, which can reduce the number of man-hours required to import the contour data of the printed wiring board designed by the system into the CAD system for the printed wiring board and create highly reliable CAD data for the printed wiring board. To provide.

[0008]

[Means for Solving the Problems] In order to solve the above problems, the means adopted by the present invention is to input the contour data, and to fill the area separated by the contour data with the contour data. A means for converting into fill data using at least one type of data of line segment data with width, arc data with width and position data with width;
A CAD system for a printed wiring board having means for editing the filled data is used.

Further, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a printed circuit board C according to the present invention.
A block diagram of an AD system is shown. In FIG. 1, (1) is contour data created by designing a printed wiring board by a mechanical CAD system,
(2) is a fill process for converting the input contour data into fill data using at least one type of data with line segment data with width, arc data with width, and position data with width, and (3) is ( The printed wiring board CAD data that has been subjected to the filling processing in 2), (4) is the editing processing of the printed wiring board CAD data, and (5) is the printed wiring board CAD after the editing processing.
The data.

[0010]

The present invention has the following effects by adopting the above means. In FIG. 1, outline data (1) created by designing a printed wiring board by a mechanical CAD system or the like is subjected to a filling process (2) to obtain line segment data with width, arc data with width, and position with width. Converted to fill data using at least one type of data, and use it for printed wiring board C
AD data (3) is created, and by the pattern editing (4), the CAD data (5) for the printed wiring board after the editing processing is performed.
Is created.

[0011]

EXAMPLE Next, CA for printed wiring board according to the present invention
An example of the D system will be described. (Embodiment 1) In FIG. 2, (6) is a mechanical CAD system, and (7) is a CA for a printed wiring board according to the present invention.
D system, (8) hard copy device, (9) electrostatic plotter, (10) laser plotter, (11) LA
N (local area network). In the figure, the mechanical CAD system (6) and the printed wiring board CAD system (7) are connected by a communication line, and the printed wiring board is designed by the mechanical CAD system (6). The transferred contour data can be transferred. CAD system for printed wiring board (7) is LA
The electrostatic plotter (9) and the laser plotter (10) are connected via N (11), the electrostatic plotter output from the CAD system (7) for the printed wiring board, and the film produced by the laser plotter. (Circuit forming film, solder resist forming film, etc.) can be drawn. Further, the result of DRC (design rule check) can be output to the hard copy (8).

By using the above system,
The design data of the printed wiring board, which is composed of contour data such as mechanical CAD, is read as it is into the CAD for the printed wiring board, and the contour data is subjected to so-called filling processing. It is converted into data in a form suitable for manufacturing the printed wiring board to be created. Then, the CAD data for the printed wiring board obtained by the conversion is printed for the reason that the design rules are different depending on each printed wiring board manufacturing company, that the dimensions are corrected, or that some design changes are required. It is edited by the wiring board CAD device and becomes the final CAD data for the printed wiring board. Of course, this editing work may be completed by the mechanical CAD and then transferred to the CAD for the printed wiring board.

Here, as a concrete filling method for converting the contour data (1) into the CAD data (3) for the printed wiring board, for example, the Japanese Patent No. 23168 published in 1990.
It can be carried out by the method described in JP-A-6. That is, the contour data of the figure is converted into closed loop data, then the closed loop data is given the recognition of intermediate coating, and then the filling direction is determined. After that, if there is a portion inside the figure that needs to be hollowed out, recognition of hollowing out is given and the hollowing out is performed.

(Embodiment 2) In FIG. 3, (7) is a CAD system for a printed wiring board according to the present invention, (8) is a hard copy device, (9) is an electrostatic plotter, and (10) is A laser plotter, (11) is a LAN (local area network), and (12) is a drawing reading system. In the figure, a CAD system (7) for a printed wiring board is connected to an electrostatic plotter (9), a laser plotter (10), and a drawing reading system (12) via a LAN (11). And drawing the contour data of the artwork film by the drawing reading system (12), importing the contour data into the CAD system for printed wiring board (7), electrostatic plotter output from the CAD system for printed wiring board (7), laser It is possible to draw a film for manufacturing with a plotter. Also, DRC
The result of (design rule check) can be output to hard copy (8).

(Comparative Example) In FIG. 4, (13) is a conventional printed wiring board CAD system, (8) is a hard copy device, (9) is an electrostatic plotter, and (10) is a laser plotter. (11) is a LAN (local area network), and (14) is a digitizer. In the figure, a conventional printed wiring board CAD system (13) is a LAN
It is connected to the electrostatic plotter (9), the laser plotter (10), and the digitizer (14) through (11), and after the CAD data of the drawing is converted by the digitizer (14), Data acquisition to the CAD system (13) for printed wiring boards, electrostatic plotter output,
Draws a film for manufacturing with a laser plotter.
In this case, since a large number of points on the drawing are manually input by the digitizer (14), a large number of man-hours are required and a malfunction occurs due to an erroneous input.

[0016]

As described above in detail, the CAD system for a printed wiring board according to the present invention has a mechanical CAD system.
The contour data (1) created by designing the printed wiring board by the system, etc., is subjected to the filling processing (2) and at least one kind of data of line segment data with width, arc data with width and position data with width. The characteristic is that the system configuration is such that the CAD data (3) for the printed wiring board can be created by converting it into the filled data using the CAD data created by the mechanical CAD system. Even if it is possible to perform CAD data plotter output for printed wiring boards, various data outputs for printed wiring board manufacturing, DRC, etc., it is possible to reduce the number of man-hours and improve the quality of printed wiring board design. Can be done.

By combining with a drawing reading system, the artwork film can be converted into data, designed by the CAD system for the printed wiring board, and stored by the CAD data for the printed wiring board.

[Brief description of drawings]

FIG. 1 is a process flow chart of a CAD system for a printed wiring board according to the present invention.

FIG. 2 is a block diagram showing an embodiment of a CAD system for a printed wiring board according to the present invention.

FIG. 3 is a block diagram showing another embodiment of the CAD system for a printed wiring board according to the present invention.

FIG. 4 is a block diagram of an example of a conventional CAD system for a printed wiring board.

FIG. 5 is a plan view of an example of a wiring pattern of a printed wiring board.

[Explanation of symbols]

1 ... Contour data, 2 ... Filling processing 3, 5 ... CAD data for printed wiring board, 4 ...
Pattern editing 6 ... Mechanical CAD system, 7 ... CAD system for printed wiring board 8 ... Hard copy device, 9 ... Electrostatic plotter 10, ... Laser plotter, 11. ... LAN 12 ... Drawing reading system 13 ... Conventional CAD system for printed wiring boards
14 ... Digitizer

Claims (1)

[Claims] At least one type of data is selected from the line data with width, the arc data with width, and the position data with width by the contour data input means and the filling processing of the area delimited by the contour data. A printed wiring board CAD system, comprising: means for converting the used fill data and means for editing the fill data.