JPH0452970A - Cad system for printed board - Google Patents

Abstract

PURPOSE:To lighten the burden of an operator, and in addition, to automatically reproduce an area pattern by executing processing to generate the area pattern including an undercut shape from an arranging.wiring element in an area approximate shape including area approximate shape data in its vicinity by an area automatic generation processing means. CONSTITUTION:A parts arrangement processing part executes the processing for arranging parts in conformity to an instruction from an input part. An area approximate shape data processing means executes the processing for inputting, displaying and correcting the area approximate shape data in conformity to the instruction from the input part. Besides, a wiring processing means executes the processing for generating a wiring pattern in conformity to the instruction from the input part. Then, the area automatic generation processing means executes the processing for generating the area pattern including the undercut shape from the arranging.wiring element in the area approximate shape including the area approximate shape data and its vicinity. Thus, restrictions for layout.wiring and automatic wiring are lessened, and the area pattern is automatically reproduced at the time of the change of parts layout after the completion of wiring.

Description

[Detailed Description of the Invention] [Summary] Regarding a method for handling area patterns in an interactive CAD system for printed circuit boards, it is possible to easily generate area patterns including relief shapes;
The purpose of this system is to provide a CAD system for printed circuit boards that has features such as fewer restrictions on component placement and wiring, and is equipped with an input section, a display section, and a processing device, and the processing device has a component placement processing means, an area The area outline data processing means includes an outline data processing means, a wiring processing means, and an automatic area generation processing means, the parts placement processing means is configured to perform processing for placing parts according to instructions from an input section, and the area outline data processing means The wiring processing means is configured to perform processing for input 1 display and correction of area outline data according to instructions from the input section, and the wiring processing means is configured to perform processing for generating a wiring pattern according to instructions from the input section. The region automatic generation processing means performs processing to generate a region pattern including escape shapes from region outline data and placement/wiring elements within the region outline including neighboring regions.
It is configured so that

[Industrial application field]

The present invention relates to a method for handling area patterns in a CAD system for printed circuit boards, a special C, and an interactive CAD system for printed circuit boards.

With the increase in the mounting density of printed circuit boards in recent years, the area of multilayer printed boards is also increasing due to the installation of signal wiring on the power supply layer, the complexity of the board shape, and the reduction in the number of laminated layers to reduce costs. Patterns are often used on the same layer as other elements such as signal patterns, and the shape of area patterns has become complicated due to escape from other elements on the same layer and complex board shapes, making it difficult to input and modify area patterns. Automation and simplification of the process are required.

[Prior art] Conventional placement/wiring CA 1) In Sosram t9, a region pattern is inputted after the wiring pattern is manually completed, and the region pattern including the relief shape is generated at the final stage. We have adopted and are

Therefore, the connection/unconnection check can be applied to the wiring pattern input only after the area is input. Also,
If you want to change the part of the C A D data that has already been created, the C A D datum whose area pattern shape has been changed will not fit, so the area pattern shape must be re-created using CAD. The user had to enter it.

[Problem to be solved by the invention]

Therefore, in the method of manually inputting the area pattern shape at the final stage of wiring, it takes time to input the area pattern because the area pattern shape is complex, and the relief shape of the wiring shape is automatically input and added to the area pattern shape. Even if it were possible to do so, the connection check for the wiring net that includes the area pattern is performed after the area pattern is manually created, so the connection check for the net that includes the area pattern cannot be performed until the final stage of wiring, and the area pattern There is a problem in that the operator must consider in advance where to place on the board, which places a burden on the operator.

In addition, with the method of inputting the area pattern shape at the early or middle stage of the wiring stage, when placing, deleting, or moving vias or lines within the area pattern during automatic wiring or manual wiring, it is possible to add or remove relief shapes to the area pattern. It is difficult and inefficient to perform changes and deletions one by one in terms of processing time, and in particular, when a via line or a component bin is deleted, it is difficult in terms of algorithms to restore the area pattern.

In addition, even with the above two methods, when the component placement is changed after wiring is completed, or when the wiring pattern is to be used on another board, the operator is required to re-enter the complex area pattern shape. A problem has arisen.

The present invention reduces the burden on the operator by making it possible to define the N-region pattern at or before the initial stage of printed circuit board wiring, and also imposes restrictions on placement, wiring, and automatic wiring. The purpose of this invention is to reduce (processing overhead) and to be able to automatically regenerate a small page area pattern even when the component arrangement is slightly changed after wiring is completed.

Means for Solving Problem C] FIG. 1 is a diagram illustrating the principle of the present invention. The CAD system for printed circuit boards of the present invention includes: an input section, a display section, a component placement processing means for performing component placement processing, a region outline data processing means, a wiring processing means for performing wiring processing, and an automatic region generation processing means. It is equipped with a processing device.

The component placement processing means performs processing for component placement according to instructions from the input section.

The area outline data processing means performs input 1 display and correction processing of area outline data in accordance with instructions from the input section.

The wiring processing means performs processing for generating wiring patterns according to instructions from the input section.

The region automatic generation processing means performs processing to generate a region pattern including a relief shape from the region outline data and placement/wiring elements within the region outline including the vicinity.

[Operation] In the present invention, the user inputs the area outline, and when inputting wiring elements such as wiring patterns and vias, a connection check is temporarily performed using the area outline, and when wiring is completed, the area outline is checked. A region pattern including an escape shape is automatically generated from the shape data, wiring elements within the region outline, and wiring elements in the vicinity of the region outline. Also, when making slight changes to already wired data, first erase all area shape data, change component placement, wiring patterns, etc. The area pattern is regenerated from the wiring elements and wiring elements near the area outline.

Therefore, even within the area outline, wiring elements can be installed, moved,
Deletion overhead is small, connection checks can be made immediately, and when making slight changes in placement or wiring, region shapes can be automatically generated without the user having to re-input the region shape.

[Example] An example of a printed circuit board CAD system incorporating a function of retaining area outline data is shown below.

FIG. 2 is a diagram showing an example of the hardware configuration of the present invention.

In the figure, 1 indicates an upper computer, 2 a lower computer, 3 a graphic display, 4 a keyboard, and 5 a mouse.

The hardware configuration of the system for implementing the present invention includes the host computer 1. Lower-level computer 2. Keyboard 3. It consists of a graphic display 4 and a mouse 5. However, in the system of the present invention, a host computer is used for the automatic wiring program due to processing capacity.

The upper level computer 1 is, for example, a Fuji Renso M780, and the lower level computer 2 is, for example, a Fuji Renso G160. Data transfer between the higher-level computer and the lower-level computer 2 is performed via the network.

FIG. 3 is a diagram showing an example of the software configuration of the present invention.

In the figure, 11 is a placement editor, 12 is a wiring editor, 13 is an automatic wiring program, 14 is an automatic area generation program, DI is area outline data, and D2 is area pattern data.

The software configuration of the system for implementing the present invention mainly consists of the placement editor program 11゜wiring editor
Program 12. Automatic wiring program 13. It consists of four area automatic generation programs 14. These programs use common CAD data including area outline data. In addition to these programs, there is software that performs communication between the higher-level computer 1 and the lower-level computer 2, and an operation system that manages the operations of the programs.

Each program is started by an operator's instruction (by keyboard or mouse) to O3.

Work in the placement editor 1 and wiring editor 12 is performed through visual interaction using the graphic display 3 and mouse 5. The automatic wiring program 13 and the automatic area generation program 14 are batch processing type programs.

In the placement editor 11, the operator places necessary components on the printed circuit board. The arrangement position is determined by specifying the position on the graph ink screen using the mouse 5. When the arrangement of all components is completed, the bins of components that can be connected to the power supply layer and the ground layer are automatically exposed and connected. Component pins inside the area outline that have the same net number as the area outline (limited to those that the user has instructed to connect)
The connection is considered complete for the area, and the connection complete flag is set.

The wiring editor 12 not only inputs and modifies wiring patterns, but also inputs and modifies area patterns, area outlines, and pattern characters.
Make corrections. Operations are performed by interacting with graphics output by the program on the display 3. Use the mouse (5) to determine the installation position of the wiring pattern and the device at the apex of the polygon of the area pattern.For manual input, use the keyboard 4 and mouse 5.These functions are not Then, the wiring conditions, connections, etc. are immediately and automatically checked, and the input shape and the presence or absence of errors are displayed.In addition, unwired information, corner information, error information, element information, etc. are displayed. This can be done at any time according to the operator's instructions.

The area outline is manually drawn by pointing each m point of the polygon of the area outline on the graphic screen using a mouse. If the same net wiring pattern/area pattern is installed within the area outline, it will be considered as connected to or connected to other elements (parts bins, wiring patterns, area patterns) that are connected to the area outline. be considered.

Normally, before automatic wiring, the power supply net and ground net are completed using the wiring unit and the switch 12.

The automatic wiring program 13 wires bins that have not yet been connected according to connection definition information and wiring conditions included in the CAD data. The wiring is done so that there is no interference with the area pattern or the wiring pattern that has already been routed, but the area outline is ignored.

Region automatic generation 4' program 14 restores the shape of the region outline data 7 and generates the region balloon to be actually installed. Nozomigaenq is used to generate area patterns.

using the concept of

The f order for generating a region pattern shape from a region outline is shown below.

■ First, a region pattern is generated having the same shape and position as the region outline.

(2) Next, elements such as fund wiring patterns, area patterns, wiring prohibited areas, etc. in the vicinity of the generated area pattern are listed up.

■ Repeat the following process for each element listed.

■-Generate a polygon from the shape of one element.

(2)-2 Find the necessary gap between the element and the generated area pattern from the wiring conditions, etc.

- Offset the three-element polygon outward by the required gap. This is the relief shape of the element.

(2) Subtract the escape shape of the four elements from the shape of the area pattern. The result of the subtraction is used as the shape of the area pattern (further subtraction is applied to another element).

■Register the area pattern shape that has undergone one operation on all elements in the CAD data.

At this time, connections are automatically made using wiring patterns for the bins to be connected (those in the vicinity of the area) and for vias and wiring patterns that are the same net and have connections on only one side.

Steps ① to ③ are performed for all area outlines on the CAD data.

FIG. 4 shows a processing flow for an unwired board. The unwired data a1 means component placement data generated by the placement editor 1.1.

Under the condition that unwired data a1 exists, the wiring editor 12 performs processing such as inputting the area outline and power wiring, and the automatic wiring program 13 performs a large amount of wiring, and furthermore, the remaining unwired wires are Wiring editor 1
When the wiring is completed in step 2, a detailed region pattern shape is generated by the region automatic generation program 14, and becomes wired data a2.

FIG. 5 is a diagram showing a processing flow for changing an existing wiring board.

When changing the layout and wiring of existing data, the following processing is performed. FIG. 5 shows the flow of data when changing existing layout and wiring data. In the wired data bi, the detailed region shape generated by the region outline is deleted by the wiring editor 12]-, and after the wiring is changed, the detailed region shape is generated by the region automatic generation program 14, and becomes modified data b2.

FIG. 6 is a diagram showing the state before wiring and before the area outline film W. The figure shows a part of the multilayer printed circuit board enlarged.
It's another thing. When the placement of the ζ parts is determined by the placement editor, the figure shown in the figure appears on the screen 1. will be displayed.

FIG. 7 is a small diagram showing the state in which the area outline is installed. In the same figure, ☆ indicates the bins of the same to net I. If you want to input the area outline, operate the wiring editor and input the corresponding layer number.

Then, the pattern of the corresponding layer will be displayed on the display screen. In this state, when an instruction is given to input the area outline and a vertex of a polygon representing the area outline is specified, the area outline is displayed on the display screen.

FIG. 8 is a diagram showing the state after wiring is completed. The figure shows only one layer. By operating the wiring editor and specifying the starting point and ending point of the wiring, as well as the route along the way, it is possible to perform wiring between two desired points. Further, by running an automatic wiring program and specifying the start point and end point for each of a plurality of wirings, it is possible to automatically generate a plurality of wiring patterns.

FIG. 9 is a diagram illustrating generation of a region pattern from a region outline. When the automatic region generation program is run, the automatic region generation program generates layout and wiring elements (lands, vias, etc.) including the region outline and vicinity.

A region pattern to which a relief shape is added is generated from a wiring pattern (wiring pattern, etc.). FIG. 10 shows only the area pattern.

[Effects of the Invention] As is clear from the above description, according to the present invention, there is little overhead when adding or deleting elements to new CAD data, and connection checks can be made online. When data is slightly changed, it is possible to generate an area without manually reshaping the area shape, which greatly contributes to improving the functionality of CAD.

In the above-described embodiment, the region outline input is performed by the wiring editor, but the input may be performed as a separate independent program, or may be included in a program at a stage before wiring processing. Further, the area outline data may be treated as separate data separated from the CAD data.

[Brief explanation of the drawing]

Fig. 1 is a diagram illustrating the principle of the present invention, Fig. 2 is a diagram showing an example of the hardware configuration of the invention, Fig. 3 is a diagram showing an example of the software configuration of the invention, and Fig. 4 is a processing flow for unwired boards. FIG. 5 is a diagram showing the processing flow for changing an existing wiring board.
Figure 6 is a diagram showing an example of the state before wiring and before installing the area outline,
FIG. 7 is a diagram showing an example of a state in which the region outline is installed, FIG. 8 is a diagram showing an example of the state after wiring is completed, and FIG. 9 is a diagram illustrating generation of a region pattern from the region outline, FIG. 10 is a diagram showing only the area pattern. 1... Upper computer, 2... Lower computer, 3... Graphic display, 4... Keyboard, 5...
... Mouse, 11... Placement editor, 12... Wiring editor, Engineering 3... Automatic wiring program, 14...
Area automatic generation program, Dl... area outline data,
D2...Area pattern data. Patent Applicant: Fujitsu Ltd. Representative Patent Attorney 4 Kyotani Subordinate, Section 5 Mei no Hara Kori store siege prisoner Figure 1 Honhatsu Tomo No 8-]: 'Ware Oke-E, fi+' Bud 2 Figure book Invention's So-Soware 11 Anti-A Column 3rd Diagram Rikushiki 10 ridges 4 Rihon to Inner Chamber King V Flow Diagram 4

Claims (1)

[Claims] A processing device comprising: an input section, a display section, a component placement processing means for performing component placement processing, a region outline data processing means, a wiring processing means for performing wiring processing, and an automatic region generation processing means. A CAD system for printed circuit boards, wherein the component placement processing means is configured to perform processing for component placement according to instructions from the input section, and the area outline data processing means is configured to perform processing for component placement according to instructions from the input section. , the wiring processing means is configured to perform processing for inputting, displaying, and modifying area outline data, and the wiring processing means is configured to perform processing for generating wiring patterns according to instructions from the input section, A CAD system for a printed circuit board, characterized in that the processing means is configured to perform processing for generating an area pattern including an escape shape from area outline data and placement/wiring elements within the area outline including the vicinity. .