JPH0773210A - Printed board design supporting system - Google Patents

Abstract

PURPOSE:To provide a printed board design supporting system which is capable of performing a design with efficiency and high reliability even when plural circuits where design references are different one another are formed on a sheet of printed board. CONSTITUTION:Parts information 1a on the specification of parts to be mounted and connection information 1b on the connection between parts pins arm stored in a pattern file 1 and plural design references 2a which are different one another including a pattern line width and the minimum distance dimension with adjacent elements are stored in a reference file 2. Each area on a printed board where each circuit should be formed is designated by an area designation means 3 and each design reference which should be applied to each area is designated from the design reference 2a by a reference designation means 21. Based on the parts information 1a, the connection information 1b and the design reference 2a designated for each area, a parts arrangement means 5 performs a processing arranging parts on the printed board and a wiring processing means 6 performs the wiring processing between arranged parts pins.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board design support device (printed circuit board CAD system).

In recent years, the work load on the design department has been increasing, for example, due to the shortening of the delivery time of the design work of the printed circuit board in response to new products to be announced one after another. Has been introduced to improve the efficiency of design work.

The printed circuit board design support device includes component information regarding specifications of components to be mounted on the printed circuit board, connection information regarding connections between component pins, design criteria (pattern line width, distance between adjacent elements, etc.), By storing other information in a file in advance or inputting it appropriately in an interactive manner, layout processing of components to be mounted, wiring processing between component pins, etc. are performed automatically or semi-automatically, and design drawings, etc. Is a device that outputs the design data of.

Recently, there is a tendency to form a plurality of circuits (power supply circuit, signal processing circuit, etc.) having different functions and applications on a single printed circuit board, and more efficiently responding to this tendency. It is desired to provide a printed circuit board design support device capable of performing design work.

[0005]

2. Description of the Related Art As a design standard for component placement and wiring on a printed circuit board, for example, as shown in FIG. Input to the printed circuit board design support device.
The design standard shown in FIG. 9A represents “through three pins (standard for allowing up to three pattern wirings between component pins)”.

Then, the printed circuit board design support device performs the wiring process so as to meet this standard in the case of automatically performing the wiring process, and specifies it in the case of the interactive wiring by the operator. Check whether the wiring is proper or not in light of this standard, and if it is incorrect, make fine adjustments so that it complies with the standard.

An example of wiring according to this design standard is shown in FIG. 1B, in which 11 is the outer shape of the printed circuit board under design, 12 is the position of the pin of the arranged component, and 13 is the position. Is a pattern for connecting pins. It can be seen that the pattern 13 has a maximum of three wirings between the pins 12 and 12 and complies with the design standard “three through pins”.

By the way, electronic equipment is generally composed of a plurality of printed circuit boards, and required circuits (power supply circuit, signal processing circuit, etc.) are generally formed on independent printed circuit boards in units of their functions and uses. Target. Therefore,
In the conventional printed circuit board design support device, one design standard is set for each printed circuit board as shown in FIG.

[0009]

However, recently, the scale and density of the printed circuit board have been increased, and for example, as shown in FIG. , A plurality of circuits having different functions (power supply circuit, signal processing circuit, etc.) tends to be formed.

In FIG. 6B, 14 is the outer shape of the printed circuit board under design, 15 is the position of the pin of the arranged component,
16 is a pattern for connecting the pins. Further, 17 is a circuit A (signal processing circuit), and 18 is a circuit B (power supply circuit).

In this case, as shown in FIG.
The circuit A and the circuit B have different design criteria, but if only one design standard can be set for one printed circuit board as in the conventional case, it occupies a relatively large portion of the circuit to be formed on the printed circuit board. Input the design standard “Three pins between pins” corresponding to a large area (for example, circuit A), and for the remaining circuit (for example, circuit B), the operator (designer) designs the circuit. We are doing the work of visually observing the standard "through one pin between pins", which does not allow an efficient design.
There was also the problem of low reliability.

The present invention has been made in view of the above points, and an object thereof is to form a plurality of circuits having different design standards on a single printed circuit board. It is an object of the present invention to provide a printed circuit board design support device capable of performing efficient and highly reliable design.

[0013]

In order to achieve the above object, a printed circuit board design support device as shown in FIG. 1 is provided.

That is, this printed circuit board design support device is
The pattern file 1 that stores the component information 1a regarding the specifications of the components mounted on the printed circuit board and the connection information 1b regarding the connection between the component pins, the line width of the pattern provided on the printed circuit board, and the minimum distance between the adjacent elements. , A reference file 2 in which a plurality of mutually different design standards 2a including wiring traces and a circuit to be formed on a printed circuit board are divided according to their functions and uses, and each divided circuit should be formed. Area designating means 3 for designating areas on the printed circuit board and standard designating means 4 for designating design criteria to be applied to each of the areas designated for division from the design criteria 2a of the standard file 2 are provided. .

The component information 1 of the pattern file 1
a and component placement means 5 that performs a process of placing a component on a printed circuit board based on the design standard 2a that is selectively designated for each area designated for division, and the component placement information and pattern file 1 by the component placement means 5. Wiring processing means 6 for performing wiring processing between the pins of the arranged parts based on the connection information 1b and the design standard 2a selected and specified for each divided and specified area. The processing result is output to the file 7 as design data, for example.

[0016]

When forming circuits having different functions (for example, a signal processing circuit and a power supply circuit) on a printed circuit board, they are formed relatively concentrated on a part of the printed circuit board for each function. Is common.

Therefore, in the printed circuit board design support apparatus of the present invention, a plurality of design standards are defined and set in advance, and the operator (designer) covers the entire area of the printed circuit board with the functions and characteristics of the circuit to be formed. According to the above, the area is divided into a plurality of areas, and the design criteria to be applied to the areas designated to be divided are associated with each other, so that the component placement and wiring processing is performed using the corresponding design criteria for each area. I did it.

Therefore, even when a plurality of circuits having different functions / uses are formed on one printed circuit board, they are processed according to the design criteria corresponding to the respective functions / uses. It is not necessary to perform such visual confirmation, and the efficiency and reliability of the printed circuit board design can be improved.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a flowchart showing the processing of the embodiment of the present invention. First, a circuit formed on a printed circuit board is divided according to its function / use, and an area on the printed circuit board on which the circuit is to be formed is specified for each divided circuit using the area specifying means 3 ( Step "abbreviated as ST" below
1).

For example, as shown in FIG. 3, an area on the printed circuit board is designated such as an area for a power source, an area for a digital circuit, an area for an analog circuit, and an area for a connector.

Next, design criteria such as those shown in FIG. 4 are assigned to each of the divided areas by using the criteria designating means 4 (ST2). This design standard is selected and designated from those registered in advance in the standard file 2 or defined / input as required.

In FIG. 4, the inter-component gap is the minimum gap between the component to be placed and the adjacent component, and the standard pattern line width is the standard line width of the pattern to be formed. The possible pattern line width can be used with a line width other than the standard pattern line width, and the wiring trace is a position where the pattern should run. The land / land gap is the minimum gap between the land and the adjacent land, the land / pattern gap is the minimum gap between the land and the adjacent pattern, and the pattern / pattern gap is between the pattern and the adjacent pattern. It is the minimum gap.

After that, for all the components to be mounted on the printed circuit board, areas to be arranged are designated (ST3). It is assumed that the component information 1a regarding the specifications of the components mounted on the printed circuit board and the connection information 1b regarding the connection between the component pins are already registered in the pattern file 1.

The component arranging means 5 arranges the parts on the printed circuit board based on the component information 1a and the design standard 2a designated by the standard designating means 4 for each area designated by the area designating means 3. Do (ST
4).

Then, the wiring processing means 6 uses the component placement information, which is the processing result of the component placement means 5, connection information (net information: number of component pins and component pins to be connected thereto) 1b, and area designating means 3. Based on the design standard 2a designated by the standard designating means 4 for each designated region, wiring processing between the pins of the arranged components is performed (ST5).

In this way, the circuit formed on the printed circuit board is divided according to its function / use (power supply, digital circuit, analog circuit, connector, etc.), and each is arranged on the printed circuit board. In addition to specifying each area, the design criteria that should be applied to each area are specified, and the component placement and wiring processing is performed by applying the applicable design criteria to each area. Since the processing is performed according to the design standard suitable for the function / use, it is not necessary to perform visual confirmation as in the conventional case, and the efficiency and reliability of the printed circuit board design can be improved.

[0027]

Since the present invention is configured as described above, an efficient and highly reliable design can be achieved even when a plurality of circuits having different design criteria are formed on a single printed circuit board. An effect that a printed circuit board design support device that can be performed is provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing a principle configuration of the present invention.

FIG. 2 is a flowchart showing a process of an embodiment of the present invention.

FIG. 3 is an explanatory diagram for dividing and designating an area on a printed circuit board according to an embodiment of the present invention.

FIG. 4 is a diagram showing design criteria in an embodiment of the present invention.

5A and 5B are explanatory diagrams of a conventional technique, in which FIG. 5A shows a design standard and FIG. 5B shows a wiring result.

6A and 6B are explanatory diagrams of problems in the conventional technique, in which FIG. 6A shows a design standard and FIG. 6B shows a wiring result.

[Explanation of symbols]

 1 pattern file 1a parts information 1b connection information 2 standard file 2a design standard 3 area designation means 4 standard designation means 5 component placement means 6 wiring processing means

Claims (1)

[Claims] 1. A pattern file (1) in which part information (1a) regarding specifications of parts to be mounted on a printed circuit board and connection information (1b) regarding connection between component pins are stored, and a pattern provided on the printed circuit board. Line width, minimum distance between adjacent elements, and a reference file (2) that stores a number of different design criteria (2a) including wiring traces, and the circuit to be formed on the printed circuit board. Area designating means (3) for designating areas on the printed circuit board on which each of the divided circuits is to be formed, and a design file to be applied to each of the divided and designated areas in the reference file (2) Of the design criteria (2a), the designating means (4) for selectively designating the design information (4a) and the design information (1a) of the pattern file (1) and the design criteria (1) for each of the areas designated for division. 2a) Component placement means (5) that performs the process of placing components on the printed circuit board, the component placement information by the component placement means (5), the connection information (1b) of the pattern file (1), and each area designated for division A printed circuit board design support device comprising wiring processing means (6) for performing wiring processing between pins of arranged parts based on the design standard (2a) that is selected and designated respectively.