JPH0964497A - CAD system for printed wiring board design and device for creating component data used in the system - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] Printed wiring board design C capable of preventing wiring or via holes from being provided at positions where wiring errors occur during processing of determining a wiring pattern connecting components.
An AD system and an apparatus for creating component data used in the system are provided. SOLUTION: In a printed wiring board design CAD system having component data in which a pin exists for the purpose of preventing wiring error, a component is provided corresponding to a position where a wiring pattern or a via hole is prohibited from being provided in the component data. The virtual part pin information that is recognized as a pin is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents wiring errors in wiring design using a CAD (Computer Aided Design) system for interactively designing a wiring pattern formed on a printed wiring board using a computer. The present invention relates to a printed wiring board design CAD system and a component data creating apparatus used in the system.

[0002]

2. Description of the Related Art Today, CAD is considered in consideration of streamlining design work.
The design using the system is adopted, and this is also adopted when designing the wiring pattern on the printed wiring board.

FIG. 8 is a block diagram showing an example of a generally known printed wiring board design CAD system. 8, in this CAD system, roughly, an input / output device 101 for designing component data and printed wiring board data, a circuit diagram creation input / output device 102 for performing circuit diagram design work, a computer device 103, It is composed of an input / output device 104 and the like for designing a printed wiring board while interacting with the computer device 103.

More specifically, the computer device 10
3 is a device 105 for storing the component data and the printed wiring board data input from the input / output device 101, the circuit data input from the circuit diagram creation input / output device 102 and the component data and the print stored in the storage device 105. It is provided with a central processing unit 106 that performs processing for determining mounting of components based on wiring board data, and a storage device 107 that stores data processed by the central processing unit 106.

The input / output device 104 displays a keyboard 108 for keying in printed wiring board design information, a mouse 109 for two-dimensionally inputting printed wiring board design information, and data processed by the central processing unit 106 as a drawing. A graphic display 110 is provided.

FIG. 9 is a block diagram showing the structure of part data in the CAD system shown in FIG. In FIG. 9, the component data 120 includes circuit element data 121 of a component used in a circuit diagram design work, and external data 1 of a component used in a printed wiring board design CAD system.
22 and 22. Furthermore, the external data 1 of the part
22 includes at least component pin position data 123, component mounting hole data 124 provided at the time of mounting on a printed wiring board, and component external dimension data 125.

Here, the case of designing a printed wiring board on which the electronic component 130 shown in FIG. 10 is mounted will be described as an example. The electronic component 130 here has a positioning pin 131 formed on the bottom surface. When the component pin position data 123 on the printed wiring board is created, the printed wiring board is divided into a matrix and the component pins 131 of the component 130 are made to correspond to this, and the position of this component pin 131 is two-dimensionally determined. I was typing. That is, the component 130 shown in FIG.
As an image, it is drawn as shown in FIG. Note that, in FIG. 12, a portion indicated by reference numeral (130) indicates the outer shape of the component 130 in the data, and a portion indicated by reference numeral 132 indicates an input coordinate point indicating the position of the component pin 131 designated in the data.

[0008]

By the way, in the above-mentioned conventional CAD system for designing a printed wiring board, as shown in FIG.
When the process of determining the wiring pattern connecting the components using the component data 120 shown in 1 is performed, the wiring is performed at the position where there is no component pin in the component data 120. Therefore, although FIG. 12 shows an example thereof, reference numeral 1
When 40 is a component mounting hole, a wiring pattern 141, a via hole 142, etc. were often provided under the component outer shape (130) avoiding the component mounting hole 140. In this case, since the wiring pattern 141 and the via hole 142 are arranged immediately below the component 130, mutual induction occurs due to the signals flowing through the wiring pattern 141 and the via hole 142, and this mutual induction may cause a malfunction. There was a problem that it was very expensive.
If the component 130 is a metal component, since the wiring pattern 141 and the via hole 142 are arranged,
The wiring pattern 141 and the via hole 142 are used for the component 13
There was a problem of short-circuiting through 0. Therefore, the operator must always pay attention to the installation position of the wiring pattern 141 and the via hole 142 while looking at the graphic display 110 of the input / output device 104 shown in FIG. 10, which causes a problem of poor workability. It was In addition, if found in the later confirmation work, wiring pattern 1
The positions of the wiring 41 and the via hole 142 are changed, which greatly affects the correction man-hours of the wiring pattern.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a wiring at a position which causes a wiring error in a process of determining a wiring pattern connecting parts in a printed wiring board design CAD system. Another object of the present invention is to provide a printed wiring board design CAD system capable of preventing the formation of a via hole or a via hole, and a component data creating apparatus used in the system.

[0010]

In order to achieve the above object, in the present invention, in a printed wiring board design CAD system having component data, the component data includes:
Virtual component pin information that is recognized as a component pin is provided corresponding to the position where the wiring pattern or via hole is prohibited, and the wiring pattern or the via hole is provided while avoiding the component pin. It was done.

According to this, by providing the virtual pin in the component data, when the process for determining the wiring pattern connecting the respective components in the printed wiring board design CAD system is performed, the wiring pattern and the via hole are located at the virtual pin position. Can be forcibly not provided. This can prevent wiring errors on the printed wiring board.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a component data creation device shown as an embodiment of the present invention.
Note that the component data created here can be rewritten and stored in the storage device 105 of the printed wiring board CAD system shown in FIG. 8, and thereafter, the printed wiring board is designed using this component data. Is something that can be done. Therefore, in the following description, the same reference numerals as those in the system shown in FIG.
It corresponds to the components in the system shown in FIG.

In FIG. 1, the component data generating apparatus includes a keyboard 1 for keying in printed wiring board design information, a mouse 2 for inputting point and line segment data, and a graphic display 3 for displaying graphic data as a drawing. The input device 4 for inputting various data provided is used, but these can be used even if the input / output device 104 of the printed wiring board CAD system shown in FIG. 8 is used.

Further, in this component data creating apparatus, in addition to the input device 4, a circuit element input unit 5 for inputting a circuit element representing the function of the component, and a component outer shape input unit 6 for inputting the outer dimension of the component. , Component pin hole diameter / hole shape input section 7 for inputting the mounting hole diameter and mounting hole shape of the component pin, and the component pin number / inputting the component pin number and the component pin position /
A pin position input unit 8, a virtual component pin number / pin position input unit 9 for inputting a virtual component pin number and a virtual component pin position, and a circuit element for processing the data input by the circuit element input unit 5. Data creation processing unit 10, component external force input unit 6, component pin hole diameter / hole shape input unit 7, component pin number /
A component outline data creation processing unit 11 that processes the data input by the pin position input unit 8 and the virtual component pin number / pin position input unit 9, and a circuit element that stores the data processed by the circuit element data creation processing unit 10. A data storage unit 13, a component outer shape data storage unit 12 for storing data processed by the component outer shape data creation processing unit 11, and a component based on the data stored in the circuit element data storage unit 13 and the component outer shape data storage unit 12. Part data creation processing unit 1 for creating data
4 and a component data storage unit 15 that stores the data processed by the component data creation processing unit 14.

FIG. 2 is a flow chart showing an example of a processing procedure for producing the component data in the component data producing apparatus shown in FIG. 1, and FIGS. 3 and 6 are explanatory diagrams for producing the component data. Therefore, the procedure for creating the component data will be described below with reference to the flowchart shown in FIG. 2 and FIGS. 3 and 6.

First, FIG. 3 corresponds to steps S1 and S2 of the flow chart shown in FIG. 2, and while watching the graphic displayed on the graphic display 3 of the input device 4, the circuit element 70 is operated from the keyboard 1 or the mouse 2. Is input and the circuit element 70 is input from the circuit element input unit 5.
The terminal name 71 and the pin number 72 are input to each of the terminals (steps S1 and S2).

Next, FIG. 4 corresponds to steps S3 and S4 shown in FIG.
3 is used to find the input points in matrix form, and step S
In step 4, the pin number corresponding to the pin number input in step S2 is input to the component pin position 73 from the component pin number / pin position input unit 8.

FIG. 5 corresponds to steps S5 to S7 of the flow chart shown in FIG. 2. In step S5, a part mounting hole 74 is provided at the position 73 of the part pin input in step S3.
Is input by the component pin hole diameter / hole shape input unit 7, and the component outline 75 is input by the component outline input unit 6 in step S6.
Further, in step S7, a position where the wiring pattern and the via hole are not desired to be provided is determined, and in step S8, the virtual component pin 79 is provided with a pin number other than the pin number input to the pin position 73 by the virtual pin number / pin position input unit 9. input.

FIG. 6 is a diagram showing a state after the creation of the component data is completed. The virtual pin position 80 is provided with the pin position and the pin number of the virtual pin, and there is no component mounting hole. The component data thus created is stored in the same printed wiring board design CAD system via the component data / printed wiring board data input / output device 101 in the printed wiring board design CAD system shown in FIG. It is stored in 105 and is used until the next data rewriting.

FIG. 7 is a diagram showing an example of a case where the processing for determining the wiring pattern is performed by the central processing unit 106 by using the component data stored in the storage device 105 by the above-mentioned creation. In FIG. 7, reference numeral 90 is a virtual pin, and it is recognized that there is a component pin on the virtual pin 90 based on the component data. As a result, the wiring pattern 83 and the via hole 81 are provided avoiding the virtual pin 90.

[0021]

As described above, according to the present invention,
By providing a virtual pin in the component data, it is not necessary to forcibly provide a wiring pattern or a via hole at the virtual pin position when performing a process of determining a wiring pattern connecting between components in a printed wiring board design CAD system. Will be possible. This prevents wiring errors on the printed wiring board and eliminates the need for operator visual confirmation and wiring pattern correction work with an input / output device, thus improving the reliability of the printed wiring board and the workability of the operator. Can be expected.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a component data creation device shown as an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure for creating component data.

FIG. 3 is an explanatory diagram of creating component data.

FIG. 4 is an explanatory diagram of creating component data.

FIG. 5 is an explanatory diagram of creating component data.

FIG. 6 is an explanatory diagram of creating component data.

FIG. 7 is a diagram showing an example of a wiring pattern processed by this component data.

FIG. 8 is a configuration block diagram showing an example of a printed wiring board design CAD system.

FIG. 9 is a block diagram showing a structure of component data.

FIG. 10 is an external perspective view showing an example of an electronic component.

FIG. 11 is a diagram conceptually showing component data.

FIG. 12 is a diagram showing an example of a wiring pattern processed by conventional component data.

[Explanation of symbols]

 4 Input device 5 Circuit element input section 6 Component external shape input section 7 Component pin hole diameter / hole shape input section 8 Component pin number / pin position input section 9 Virtual component pin number / pin position input section 10 Circuit element data creation processing section 11 Component outline data creation processing unit 12 Component outline data storage unit 13 Circuit element data storage unit 14 Component data creation processing unit 15 Component data storage unit

Claims (3)

[Claims] 1. A printed wiring board design C having component data.
In the AD system, virtual component pin information that is recognized as a component pin is provided in the component data corresponding to a position where a wiring pattern or a via hole is prohibited from being provided, and the wiring pattern or the wiring pattern is avoided while avoiding the component pin. A printed wiring board design CAD system characterized in that the via hole is provided. 2. A printed wiring board design CAD system comprising a storage device in which the component data can be arbitrarily rewritten and which stores the rewritten component data. 3. A printed wiring board design C having component data.
An input device for inputting various data, a circuit element input section for inputting a circuit element representing a function of a part, and a part external shape input section for inputting external dimensions of a part in a part data creating apparatus used in an AD system. , A component pin hole diameter / hole shape input section for inputting the mounting hole diameter and mounting hole shape of the component pin, a component pin number / pin position input section for inputting the component pin number and the component pin position, and a wiring pattern A virtual component pin number / pin position input unit for inputting the number of a virtual component pin recognized as a component pin and the position of the virtual component pin corresponding to the position where the provision of a via hole or a via hole is provided, and the circuit element input Circuit element data creation processing section for processing the data input in the section, the part external force input section, the part pin hole diameter / hole shape input section, and the part pin number / pin position input And a component outline data creation processing unit that processes data input by the virtual component pin number / pin position input unit, a circuit element data storage unit that stores data processed by the circuit element data creation processing unit, and a component A component outline data storage unit that stores data processed by the outline data creation processing unit, and a component data creation process that creates component data based on the data stored in the circuit element data storage unit and the component outline data storage unit And a component data storage unit for storing data processed by the component data creation processing unit, and virtual component pin information can be provided in the component data. A device for creating component data used in a design CAD system.