JPH04335474A - Pattern wiring state display system - Google Patents

Abstract

PURPOSE:To derive and display a pattern cuttable position by retrieving together a pattern in the periphery of a designated signal at the time of retrieving a pattern wiring state. CONSTITUTION:A state of an object pattern wiring of a signal designated by a signal name input device 1 is retrieved from a data file 3 and displayed, and also, a pattern wiring state retrieving device 2 retrieves a wiring state of a pattern in the periphery of the designated object wiring pattern, derives a pattern cuttable position on the object wiring pattern, and displays its position in accordance with a pattern wiring state display device 4 of the designated signal. In such a way, in the case it becomes necessary to cut the pattern, a pattern cut position can be detected easily.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pattern wiring status display system, and relates to, for example, the assembly, testing, and adjustment of multilayer printed wiring boards.

0002

2. Description of the Related Art FIG. 4 is a diagram showing a conventional multilayer printed wiring board pattern wiring status display system. In the figure, 1 is a signal name input device, and 2 is a signal name pattern input from the signal name input device 1. Search device for searching wiring status, 3
Reference numeral 4 indicates a pattern wiring data file of a multilayer printed wiring board that serves as search data for the search device 2, and 4 a display device that displays the searched pattern wiring status.

Next, the operation will be explained. A signal name whose pattern wiring status is desired to be displayed is input by the signal name input device 1 and sent to the search device 2. The search device 2 searches the pattern wiring data file 3 of the multilayer printed wiring board for the data of the signal name, and sends the found data to the pattern wiring status display device 4. The pattern wiring status display device 4 displays the wiring status of the pattern based on the data.

0004

[Problems to be Solved by the Invention] Conventional multilayer printed wiring board pattern wiring status display systems search for and display only designated signals, and search for pattern wiring status around the designated signals. Therefore, there were problems such as not being able to find the position to cut the inner layer pattern during testing and adjustment of multilayer printed wiring boards.

[0005] This invention was made to solve the above-mentioned problems, and it is possible to search for patterns around a specified signal when searching for pattern wiring status, to find and display positions where the pattern can be cut. The purpose is to do so.

[0006]

[Means for Solving the Problems] A pattern wiring status display system according to the present invention has the following elements. (a) An input device for specifying a predetermined pattern wiring on a printed wiring board as a target pattern wiring, (b) a data file that stores information on pattern wiring on a printed wiring board, (c) information on the target pattern wiring and the target pattern. (d) a pattern wiring situation search device that searches a data file for information on the pattern wiring in a predetermined positional relationship with the wiring, and specifies a predetermined position of the target pattern wiring based on the relationship between the two pieces of information; An output device that outputs the specified position of the specified target pattern wiring.

[0007]

[Operation] The pattern wiring status display system according to the present invention searches for and displays the target pattern wiring status of the signal specified by the input device, and the pattern wiring status search device searches for and displays the target pattern wiring status of the signal specified by the input device. Search the wiring situation, find the possible pattern cutting position,
The position is displayed in accordance with the pattern wiring status display of the designated signal. That is, the pattern wiring status search device searches for a position that does not affect other signal wiring patterns using the target pattern wiring data of the designated signal and the pattern wiring data of other signals around it.

[0008]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a signal name input device (an example of an input device) for inputting the name of a signal whose pattern wiring status is to be displayed, and 2 is a search for the target pattern wiring status of the signal name input from the signal name input device 1. and a pattern wiring situation search device that searches for the surrounding pattern wiring situation and searches for positions where inner layer patterns can be cut from the searched pattern wiring situation; 3 is a multilayer printed wiring that is the search data for the pattern wiring situation search device 2; The board pattern wiring data file 4 is a pattern wiring situation display device (an example of an output device) that displays the pattern wiring situation searched and obtained by the pattern wiring situation search device 2 and the position where the inner layer pattern can be cut. FIG. 2 shows the pattern wiring situation of a 4-layer printed wiring board, where 6 is a component pin with signal name A, 6a is a 1-layer pattern with signal name A, 6b is a 2-layer pattern with signal name A, 6c is a three-layer pattern with signal name A, 6
d is a 4-layer pattern with signal name A, 7 is a component pin with signal name B, 7a is a 1-layer pattern with signal name B, and 7b is a 2-layer pattern with signal name B, and these data are used in the multilayer printed wiring board. It is assumed that the pattern wiring data file 3 is entered. FIG. 3 shows the results displayed on the pattern wiring status display device when signal name A is specified, and 8 represents the position where the inner layer pattern can be cut.

Next, the operation will be explained. An example of searching and displaying signal A of the four-layer printed wiring board in FIG. 2 will be described. A signal name A is input from the signal name input device 1 and sent to the pattern wiring status search device 2. The pattern wiring status search device 2 searches 6, 6a, 6b, 6c, and 6d using the signal name as the key.
The data is searched from the multilayer printed wiring board pattern wiring status data file 3 and the data is saved. Next 6.6
Using each coordinate of a, 6b, 6c, and 6d as a key, search for and save the data of 7, 7a, and 7b of signal name B in the surrounding area. Next, the saved signal A 6, 6a, 6b, 6c,
6d, based on the data of 7, 7a, and 7b of signal B, searches for possible pattern cutting positions of 6b, 6c, which are the inner layer patterns of signal A, and cuts 8a, 8b, and 6c that do not affect the pattern of signal B. Find 8c and save the coordinate values. Next, pattern wiring data 6 and 6 of signal A, which is the search result.
a, 6b, 6c, 6d and inner layer pattern cuttable position data 8a, 8b, 8c are displayed on the pattern wiring status display device 4.
and display it. Inner layer pattern cutting possible position 8a.
Marks and coordinates are displayed at 8b and 8c.

Now, in the above embodiment, a case was shown in which the wiring pattern for signal name A is compared with the wiring pattern for signal name B around it. Assuming that ±2 mm is removed from the center of the wiring pattern within an error of , the determination is made as follows. (1) A wiring pattern that intersects the target wiring pattern. (2) A wiring pattern that exists within ±3mm of the target wiring pattern. Similarly, the cuttable position of the target wiring pattern is ±2 from the center of the wiring pattern within an error of ±0.5mm.
Assuming that mm is removed, the result is as follows. (1) Must be at least 3mm away from the outer periphery of the component pin. (2) Must be at least 3 mm away from intersections with other wiring patterns. (3) Be as far away as possible from other wiring patterns by at least 3mm.

As described above, in this embodiment, in a system for displaying the pattern wiring status of a multilayer printed wiring board, the position for drilling a hole in the multilayer printed wiring board and cutting the inner layer pattern is searched and displayed. We have explained a pattern wiring status display system for multilayer printed wiring boards, which has the function of

Example 2. In the above embodiment, only the designated signal pattern and the inner layer pattern cuttable position mark are displayed, but the surrounding patterns may also be displayed.

Example 3. Further, in the above embodiment, the case of an inner layer printed wiring board is shown, but the case of a printed wiring board without an inner layer pattern may be used. In this case, the present invention is applied only to the wiring pattern on one side or to the wiring pattern on both sides.

Example 4. Further, in the above embodiment, a case has been shown in which the results are displayed on the pattern wiring status display device 4, but the results may also be output to a printer or other device such as an NC.

[0015]

As described above, according to the present invention, when a pattern needs to be cut during testing and adjustment of a printed wiring board, the pattern cutting position can be easily found.

[Brief explanation of drawings]

FIG. 1 is a diagram of a multilayer printed wiring board pattern wiring status display system according to an embodiment of the present invention.

FIG. 2 is a diagram showing a pattern wiring situation of a four-layer printed wiring board according to an embodiment of the present invention.

FIG. 3 is a diagram showing a pattern wiring status display result according to an embodiment of the present invention.

FIG. 4 is a diagram of a conventional multilayer printed wiring board pattern wiring status display system.

[Explanation of symbols]

1 Signal name input device 2 Pattern wiring status search device 3 Multilayer printed wiring board pattern wiring data file 4 Pattern wiring status display device

Claims (1)

[Claims] Claim 1: A pattern wiring status display system having the following elements: (a) an input device for specifying a predetermined pattern wiring of a printed wiring board as a target pattern wiring;
b) A data file that stores information on the pattern wiring of the printed wiring board; (c) Information on the target pattern wiring and information on the pattern wiring in a predetermined positional relationship with the target pattern wiring are searched from the data file, and both pieces of information are retrieved. (d) An output device that outputs a predetermined position of the target pattern wiring specified by the pattern wiring status search device.