JPH03260774A - Mask data production system - Google Patents

Abstract

PURPOSE:To semiautomatically produce a noise protecting GND solid pattern by designating a wiring desiring the protection of a designated noise in a GND area and a specific through hole and then designating the constant clearance value. CONSTITUTION:A necessary area A is secured and a wiring which desires the protection of noises from another pattern is designated out of those wirings included in the area A. Then a parts pin having no GND connection and a connecting through hole land part like a via hole, etc., are designated in the area A. At the same time, an area B is secured with the constant clearance value to the designated wiring and the connecting through hole land. Then an area obtained by subtracting the area B from the area A is defined as a GND pattern area and filled with a filling large-width pattern. Thus a GND solid pattern is easily obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a printed circuit board (hereinafter referred to as PW) used in electronic equipment.
(denoted as B) or a mask data creation method for a ceramic substrate.

[Conventional technology]

A conventional GND solid pattern for mask data noise guard of this type is created by specifying its outline as is.

[Problem to be solved by the invention]

In the conventional mask data creation method described above, it is necessary to specify the outline of the GND solid pattern, and the outline of the escape area with loose hole lands such as component bins and via holes, and the escape area with other wiring patterns. The disadvantage was that the manual designation of personnel was complicated.

[Means to solve the problem]

The method of the present invention is a mask data creation method for a printed circuit board or a ceramic board, and includes a means for securing a required area A, and a means for specifying a wiring for which noise protection is desired from another pattern among the wiring within the area A. and a means for specifying connection through-hole lands such as component bins and via holes that are not connected to GND within the A area, and B with a constant clearance value for the specified wiring and the specified connection through-hole land. means for securing an area; means for setting an area obtained by subtracting the B area from the A area as a GND solid pattern area and tracing its outline; and means for filling the GND solid pattern area with a thick pattern for coloring. It is characterized by having.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a flowchart of the present invention, and the contents of each process are as follows.

Processing 1...Set the required area as shown in Figure 2 and select area A.
shall be.

Process 2: A GND solid pattern is used among the wiring in area A to designate the wiring to be protected from noise from another pattern. An example is shown in FIG.

Processing 3: Parts bin, V that is not connected to GND in area A
Specify the connection through-hole land portion of IA, etc.

Process 4: Secure an area with a constant clearance value for the wiring specified in Process 2 and the connection through-hole land specified in Process 3. This area will be referred to as area B. Fourth
An example of region B is shown in the figure.

Process 5: GN the area obtained by subtracting area B from area A
Set it as the D solid pattern area and trace its outline.

FIG. 5 shows an example of the obtained GND solid pattern area.

Process 6: Fill in the GND solid pattern area obtained in Process 5 with a thick pattern for filling.

Processing 7: If another GND solid pattern area is to be created, the process returns to Processing 1; if not, the process proceeds to Processing 8.

Process 8: Output the GND solid pattern area to an external file.

The above processing is performed to obtain a GND solid pattern area. FIG. 6 is an example of a mask pattern after execution of this process.

〔Effect of the invention〕

As explained above, the present invention can specify the GND area.

By specifying the wiring to be protected against noise and specifying a specific through hole, a GND solid pattern for noise protection can be created semi-automatically.

[Brief explanation of drawings]

Figure 1 is a flowchart of the present invention, Figure 2 is a diagram showing an example of setting area A, Figure 3 is a diagram showing an example of wiring for which noise protection is desired from another pattern, and Figure 4 is setting area B. FIG. 5 is a diagram showing an example of the obtained GND solid pattern area, and FIG. 6 is a diagram showing an example of the mask pattern after the process of the present invention.

Claims (1)

[Scope of Claims] In a mask data creation method for a printed circuit board or a ceramic board, means for securing a required area A, and means for specifying a wiring for which noise protection is desired from another pattern among the wiring within the area A. and means for specifying connection through-hole lands such as component pins and via holes that are not connected to GND in the A area, and B with a constant clearance value for the specified wiring and the specified connection through-hole lands. means for securing an area; means for setting an area obtained by subtracting the B area from the A area as a GND solid pattern area and tracing its outline; and means for filling the GND solid pattern area with a thick pattern for coloring. A mask data creation method characterized by: