JPS58114265A - Layout design changing system - Google Patents

Abstract

PURPOSE:To perform a pattern design which is required when a circuit design is changed, in a short time, by performing the layout design only on parts related to the design change and using old data as pattern design data as it is. CONSTITUTION:When a circuit design 1 is completed, a design information file 2 is formed based on the design and the contents of the design information file are read as data, and then, a layout design 3 which determines the arrangement and connecting pattern of each circuit element is performed by a computer. When the layout design is completed, the information is stored in a pattern design file 4. The data in the pattern design file directly corresponds to an actually manufactured printed substrate, and, when a different printed substrate is to be manufactured, different data is prepared.

Description

Detailed Description of the Invention (a) Technical Field of the Invention The present invention relates to a layout design technology (hereinafter referred to as CAD) that uses a combinator system, and particularly relates to layout design technology (hereinafter referred to as CAD) that utilizes a combinator system. This relates to technology that uses CAD.

佽）Technical background The design of printed circuit boards and ICs includes circuit design and layout design. In the layout design, the arrangement of necessary circuit elements and the cross-section pattern are designed based on the circuit design, and FicAD is used for this purpose.

CAD in this case is often executed according to the method shown in FIG. 1. When circuit design 1 is completed, design information file 2 is created based on it.

This design information file is essential for expressing the designed circuit! ! For all the front circuit elements, information for specifying the circuit element, information for following the circuit, control information used in CAD, etc. are compiled and stored for each individual element.

The content of the design information file is read as data, and based on it, a layout design 3 is performed by the combination machine, which determines the arrangement of each circuit element and the four consecutive turns. The programs used for this purpose are well known, and in order for humans to assist with parts that could not be processed by the program alone, or to make necessary modifications, commands can be entered through dialogue. Usually, a configuration is adopted.

When the layout design is completed, the information is stored in the pattern design file 4. The data in this pattern design file directly corresponds to the printed circuit board actually produced, and in order to produce a different printed circuit board, different data must be prepared.

(c) Problems with Prior Art When a circuit design is changed, conventionally the data in the design information file is changed and the layout design is restarted from the beginning. In this method, parts that are not changed must be designed again, which increases the amount of time required.

(d) Object of the Invention The present invention provides a method in which the layout is designed only for the portion related to the design change, and the old partial line data that does not require change is used as the tt pattern design data.

(・) Structure of the Invention In the present invention, the module information prepared for each circuit element used includes the number of design changes or the number of times the circuit design related to the circuit element is changed. In the present invention, version number information is included in which the corresponding numerical value is returned as 1, and a new layout design that becomes necessary due to a change in circuit design is modified by changing only the part related to the circuit element to be changed that is selected based on the version number information. The following version number information is provided in the module information.

FIG. 2 is an example of the format of module information.

Area 5 stores data for specifying this circuit element, and area 6 stores data 9 indicating how this circuit element is connected to other circuit elements. Area 8 is a deletion flag, and when the wrinkled circuit element is no longer used, a flag is set here and it is excluded from the pattern design.

Data indicating the version number, ie, version number information, is stored in the area 7, and since the present invention is characterized by the way the version number is given, this point will be explained below. However, the information in the area 5°7.8 is collectively called a management record, and rewriting due to design changes is performed in the form of 11 additional records, leaving the old records intact.

In the normal method, the overall version number increases to 1 each time a design is changed.
It can be increased step by step, and in the module Eimoto Takaaki,
This version number t indicates that the connection information of the circuit element has been changed in connection with the t-1@th design change.
For example, in the initial design, the version #1 of all module information is 1, but the version of the module information changed in the first design change (or the design change session was violated). Numbers are a matter of taste.

Furthermore, when the next change is made, the version number of the module information related to this change is changed to 3 regardless of whether it was previously 1 or 2 and rarely.

That is, at this stage, the version number of the module information is l.

2.3 types will be mixed.

In design change work, the design information file is usually rewritten every session, that is, the module information is updated.
@t-The maximum version number of the module information changed by the first session is L. Now, suppose that pattern design has been carried out at this stage and a pattern information file has been created. ・Assuming that design changes have been made after that, the version number of the previously designed pattern information is t.
It is clear that the module information for 10l or 6j+at has been written, and if the combination machine is programmed so that only the pattern design of that part can be executed, A considerable part of the previously designed pattern information can be used, thus reducing the time required for pattern design.
There is a function to extract module information with the above version number and delete its related patterns, and the output can be easily deepened by using the above version number, and other similar functions are interactive. This can be easily realized since it is used in programs.

The version number assignment method suitable for implementing the method of the present invention includes:
In addition to the above method, it is possible to increase the numerical value each time the pattern design is carried out.For example, if a pattern design is performed with version number t, the version number of module information that has been changed since then is set in the session. (2) t+1 is given regardless of the number of blocks, and after the next pattern design is executed, this becomes t+21.

It is clear that the method of the present invention is compatible with such version number information, but the method described above does not allow execution of pattern design.
In this case, an irrelevant version number could be assigned, whereas in the later example, there is a slight disadvantage in that the pattern design execution must be fed back to the design information file.

-) Effects of the Invention The method of the present invention reduces the amount of work that the users of the combiator system and the interactive production system have to do at the back, so pattern design associated with circuit design work can be done in a shorter time. , pattern information is manually [1
! Since there is no need to change f, there is no possibility of incorrect lead.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the pattern design method using CAD, #
ll2FIIJ is a diagram showing the format of module information, where l is a circuit design work, 2 is a design information file, 3 is a pattern design work, 4 is a turn @ file, 5 is information specifying a circuit element, 6 is circuit element connection information, 7 is version number information, and 8 is a deletion flag.

Claims (1)

[Claims] The module information prepared for each circuit element that cannot be used includes version information in which the number of design changes or a corresponding numerical value is placed every time a circuit design change related to the visited circuit element is made, and the circuit design is improved. The design of a new layout that is required for a change is based on the change selected based on the master edition information.