JPH08235238A - Wiring method for printed wiring board - Google Patents

Abstract

PURPOSE: To prevent the occurrence of eroneous connection by considering logic checking and performing connection in the case of connecting different net names to each other at one point. CONSTITUTION: A computer design device is provided with an input device 15 for inputting pattern data and commands required for a central processing unit 17, the central processing unit 17 for controlling the entire computer design device, a display device 18 for displaying a design pattern on a screen, a printer 19 for outputting a design pattern drawing and a drawing for checking and a storage device 20 for storing design pattern data or the like and also storing a net data group and the pattern data, etc. In the case of connecting the different net names to each other at one optional point on a pattern, net data connecting the different net names each other at the optional one point on the pattern in the different net data and the certain net data are defined as the net data and wiring for which the logic checking is considered is respectively performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board wiring method, and more particularly to a printed wiring board wiring method for checking a wiring connection pattern using a computer.

[0002]

2. Description of the Related Art In a conventional wiring method for a printed wiring board using a computer, there is only one type of net data, which is a structure for logically checking one net data group. When connecting different net names to each other at any point in the group, there is a step of manually forcibly connecting the part after the wiring is completed and visually confirming it in the drawing etc. by the procedure of the flowchart shown in FIG. are doing. This method will be described in detail with reference to FIG.

A plurality of net point names (a1, a2, a
FIG. 8 shows a net data group 81 as an example of the prior art as the net data 10 composed of the net name (A) connecting 3) as a pattern. Referring to FIG. 8, as an example of the net point name 11, net points (a1, a
2, a3) is used as a pattern to configure "A" as the net name 10. Other net names 11 and 12
Also has the same configuration as the net name 10. Net data 1 based on the net point positions (a1 ′, a2 ′, a3 ′) that implement the net point names (a1, a2, a3)
Automatic wiring or interactive wiring is performed with, and if no wiring is 0, it is completed. If unwired is not 0, automatic wiring or interactive wiring is performed again. An example of wiring is shown in FIG. In the net data 1 shown in FIG. 8, the net name “A” (10) and the net name “B” (11) are set to arbitrary points (between a2 ′ and B2 ′ as an example of the net point position 12). 1 is manually wired as a pattern 15 in which 1 is forcibly connected, and is output in the drawing and visually confirmed. Wiring example
0 is shown.

[0004]

In the case where different net names are connected at one point by this conventional procedure, the connection is leaked only by visually checking the drawings without considering the logical check. There was a problem that caused a connection mistake.

[0005]

In the printed wiring board wiring method of the present invention, a connection relation of metal wirings laid on the printed wiring board is provided at a predetermined position on the printed wiring board. In the wiring step of wiring on the printed wiring board based on the first net data including the net name expressed to connect the terminals, the cloth is checked while checking the connection relation of the first net data. And a step of determining whether all the metal wirings included in the first net data have been connected, and connecting the different net names in the first net data at desired locations. Creating second net data different from the first net data including the net name expressed as follows, and wiring for laying on the printed wiring board based on the second net data In the second step A step of wired while checking the connection between the net data, all included are metal wires in said second net data is configured to have a determining whether or not a connection.

[0006]

The present invention will be described below with reference to the drawings.

Referring to FIG. 6 showing an example of the configuration of a computer designing apparatus for carrying out the present invention, this apparatus inputs necessary pattern data and commands to the central processing unit 17.
An input device 16, a central processing unit 17 for controlling the entire computer designing device, a display device 18 for displaying a design pattern on a screen, a printing device 19 for outputting a design pattern drawing and a check drawing, a design pattern data, etc. This is a configuration having a memory device 20 for storing, and particularly for storing the net data group 21, the net data group 31, and their pattern data in the present invention.

A method of connecting different net names to each other at any one point on the pattern by the means shown in FIG. 1 in the computer-based designing apparatus configured as described above will be described.

First, the net data group 21 includes net data 10 composed of a net name (A) connecting a plurality of net points (a1, a2, a3) as a pattern,
It is composed of net data 11 composed of net names (B) connecting the net points (b1, b2, b3, b4) as patterns, and net names (C) connecting the net points (C1, C2) as patterns. 2 is shown as an example of the net data of the input data in the embodiment of the present invention. In FIG. 2, as an example of net points, "A" is configured as a net name 10 that connects "a1, a2, a3" as a pattern.
Each of the other nets 11 and 12 is also composed of "B" and "C".

Further, FIG. 3 shows an example of a net data group 31 in which different net names in the net data group 21 are connected by a pattern at any one point.

Referring to FIG. 3, "X" is formed as an example of a net name for connecting "A, B" as a pattern as a net point name.

Next, processing of wiring and unwiring of the net data group 21 will be described.

Based on the point position 42 in which the net point name (a1, a2, a3) is mounted, the net data 1
Automatic wiring or interactive wiring is performed with, and it is completed when there is no unwired. If unwiring remains, perform automatic wiring or interactive wiring again.

Further, by using the interactive wiring in the net data group 21, an arbitrary position, here, the net point position 4
As an example of No. 2, wiring is performed between a2 'and b2' as the pattern 44 of the net data group 2, and if the unwiring is 0, it is completed. If the unwired state is not 0, the interactive wiring is performed again.
An example of wiring on a printed wiring board to which the present invention is applied is shown in FIG.

[0015]

As described above, in the printed wiring board wiring method according to the present invention, the net data 1 and the net data in which different net names in the net data 1 are connected at any one point by a pattern are used as the net data. By designing the wiring separately for each logic check, the design mistake can be reduced.

[Brief description of drawings]

FIG. 1 is a flowchart of a processing procedure in a method for designing a printed wiring board according to the present invention.

FIG. 2 is an example of a net data group input to the method for designing a printed wiring board according to an embodiment of the present invention.

FIG. 3 is an example of net data 2 in the embodiment of the present invention.

FIG. 4 is a wiring example of net data 1 in the embodiment of the invention.

FIG. 5 is a wiring example of net data 2 in the embodiment of the invention.

FIG. 6 is an example of the configuration of a computer designing apparatus that implements the present invention.

FIG. 7 is a flowchart of a processing procedure in a conventional printed wiring board designing method.

FIG. 8 is an example of net data 1 in a conventional example.

FIG. 9 is a wiring example of net data 1 in a conventional example.

FIG. 10 is an example of wiring forcibly connected without considering a logic check in the conventional example.

[Explanation of symbols]

 7 Manual processing of 1-point connection pattern 8 Drawing output 9 Manual processing of 1-point connection pattern 10 Net name 11 Net point name 12 Net point position 13 Net data 1 pattern 14 Net data 2 pattern 15 Patterns forcibly connected 16 Input device 17 Central processing unit 18 Display device 19 Printing device 20 Storage device 21,81 Net data S1 to S6, S71 to S79 Steps

Claims (1)

[Claims] 1. A net name expressing a connection relationship of metal wirings laid out on a printed wiring board so that the metal wirings connect terminals provided at predetermined positions on the printed wiring board. A step of wiring while checking the connection relation of the first net data in a wiring step of wiring the printed wiring board based on the first net data; and included in the first net data. Determining whether all of the metal wirings have been connected, and the first net data including a net name expressed to connect the different net names in the first net data at desired locations. While checking the connection relation of the second net data in a step of creating second net data different from the above, and a wiring step of wiring on the printed wiring board based on the second net data. Wiring And a step of determining whether or not all of the metal wirings included in the second net data have been connected, the wiring method for a printed wiring board.