JP2004118852A - Cad system for design of electronic circuit board, recording medium recorded with program used therefor, and manufacturing method for electronic circuit board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic circuit board designing CAD system having a function capable of grasping or checking accurately a continuity condition in a wiring part such as junction of a plated wire with a sideface metallized layer, by simple processing. <P>SOLUTION: In this electronic circuit board designing CAD system, a wiring pattern diagram is input for each object, objects are integrated by connection of the objects on the same layer or connection of the objects between the layers through a via, and are registered as one arrangement of wiring net pattern. The wiring net pattern is determined as to the presence of connection to a connection deciding objective area set containing an electrification connection area for expressing the metallized layer for electrification. Since the objects connected each other, i.e. the wiring net pattern, means a wiring net connected without disconnected, coming-off of the plated wire or the like is checked easily and surely only by determining, for example, a connection to the electrification connection area for expressing the metallized layer therewith. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a CAD system for designing an electronic circuit board, a recording medium storing a program used therein, and a method for manufacturing an electronic circuit board.

(2) Since the degree of integration of semiconductor chips such as ICs and microprocessors has been rapidly increasing in recent years, the number of terminals of the input / output unit of the chip has been greatly increased. In response to this, the number of wiring parts on the electronic circuit board for connecting such chips has been rapidly increasing, and a multilayer type wiring part that has built up a multilayer wiring part via an insulating layer of polymer material or ceramic etc. Package substrates are increasing. In such an electronic circuit board, there are conductive portions serving as connection terminals, such as pads (or lands) for connecting to a chip and pads for connecting itself to another wiring board such as a motherboard. It is usually formed by exposing a large number on the surface. For example, in the electronic circuit board B shown in FIG. 1, a wiring portion 201 is formed in an insulating layer 200 made of resin or ceramic, and a terminal portion of the wiring portion 201 is bonded for connection with a chip-side terminal. While the pad 203 is formed, an intermediate portion of the wiring portion 201 is connected via a via 207 to a pin pad 202 (for connecting the connection pin 206) formed on the rear surface of the substrate.

Recently, in order to efficiently design such electronic circuit boards, a design system using a computer drawing process, a so-called CAD (Computer Aided Designing) system, has been used. This is done by opening a drawing screen on the display device and drawing a figure such as a wiring part or a pad or a via for connecting between different wiring layers on the drawing screen using an input device such as a mouse. Is what you get.

By the way, pads and lands on the above-described substrate are usually plated to ensure connection. In order to perform such plating, generally, a plating wire portion 204 is formed in the wiring portion 201, and this is connected to a metallization layer 205 for plating conduction formed on the side surface of the substrate. A method of conducting electricity through 201 is adopted. Therefore, it is important from a design point of view that a wiring portion connected to each pad or the like is designed so that the plating line is connected to the metallized layer without fail. For example, if a plated wire is missing from a certain wiring portion, a defect such as plating omission or plating unevenness may occur in a pad or the like connected to the wiring portion.

When the number of wiring portions formed in one substrate increases and the shapes are complicatedly interlaced over a plurality of layers, even when drawing a design drawing using a CAD system, one by one. It is very difficult to accurately grasp the state of formation of the plating line on the wiring portion, and the above-described failure due to oversight of the missing plating line is inevitable. Japanese Patent Application Laid-Open No. 63-188267 discloses that a drawing screen is divided into a large number of sections, and the positional relationship between wiring portions and lands in each section is investigated. Inspection methods on CAD have been proposed in which the connection state is determined if the connection state is established, so that the conduction state of the wiring section can be grasped.

However, according to the inspection method disclosed in the above-mentioned publication, unless the condition that only one pair of wiring and land figures whose positional relationship should be grasped per section is satisfied is basically satisfied. It is impossible to grasp the conduction state only by the distance. The size of this section is determined by the size of the wiring section or land to be drawn, and in designing a board in which fine wiring sections are intricately complicated, the drawing screen must be divided into a large number of sections. As a result, since it is necessary to perform the recognition of the graphic for each of the sections and the determination processing of the inter-graphic distance, there is a disadvantage that the processing requires time. In addition, in order to enable the above-described determination with a section of a certain size, the reference dimensions of the figure, such as the width of a wiring portion to be drawn and the size of a land, must be constant to some extent. If the size is not constant, the size of the section must be changed according to the change in the size, and there is a disadvantage that the processing becomes complicated.

An object of the present invention is to provide a CAD system for designing an electronic circuit board having a function of accurately grasping or checking a conduction state of a wiring portion by a simple process, such as joining of a plating wire and a side metallization layer, Another object of the present invention is to provide a recording medium storing a program to be used therein.

Means for Solving the Problems and Effects of the Invention

According to the present invention, a plurality of wiring layers are stacked via an insulating layer, and a portion to be plated where a wiring portion formed in the wiring layer is conductive is formed on the surface of the substrate while being exposed. The present invention relates to a CAD system for designing an electronic circuit board having an energization metallization layer connected to a side surface thereof,
A drawing screen display means for displaying a drawing screen of a wiring pattern figure which is a figure of a wiring portion or a portion to be plated;
Drawing layer setting means for setting a plurality of drawing layers corresponding to a wiring layer to be formed in a substrate on a drawing screen;
Object input means for inputting an object, which is a drawing unit of a wiring pattern figure, to a drawing layer;
Via input means for inputting a figure of a via connecting wiring portions between different wiring layers to a drawing layer corresponding to the wiring layer;
An area for setting a reference area corresponding to the outer shape of the main surface of the substrate and a connection determination target area formed outside the reference area in a form including an energization connection area corresponding to the energization metallization layer with respect to the drawing screen. Setting means;
A plurality of objects connected and connected to each other on the same drawing layer, or objects connected to each other via via graphics between different drawing layers are registered as an integrated wiring net figure. Wiring net figure registration means,
Wiring net connection information generating means for generating information on the connection state between the wiring net graphic and the energized connection area based on the positional relationship between the registered wiring net graphic and the connection determination target area;
Wiring net connection information output means for outputting the generated wiring net connection information;
It is characterized by having.

In the CAD system, a wiring pattern graphic is input for each object, and the objects are integrated by connecting objects on the same layer or connecting objects between layers via vias, thereby forming a set of wiring. It is registered as a net figure, and it is determined whether or not the wiring net figure is connected to a connection determination target area set including an energization connection area representing an energization metallization layer. Objects connected to each other, that is, a wiring net figure means a wiring net connected without disconnection. Therefore, it is only necessary to determine a connection relationship between this and a current-carrying connection region representing a current-carrying metallization layer, for example. Checks such as omissions can be easily and reliably performed. Further, since it is sufficient to determine the connection state with the connection determination target area in units of wiring net figures, the drawing screen is divided into a number of sections as in the method described in the above-mentioned JP-A-63-188267. There is no need to perform this, and the processing can be simplified.

The recording medium of the present invention is characterized by storing a program for causing a computer to function as each unit constituting the CAD system of the present invention. Thus, the CAD system of the present invention can be easily realized by installing the program stored in the recording medium into a computer.

Furthermore, the method for manufacturing an electronic circuit board according to the present invention includes:
A board design step of drawing a wiring pattern figure of an intended electronic circuit board using the electronic circuit board design CAD system of the present invention;
In accordance with the design contents, a plurality of wiring layers are stacked via an insulating layer, and a portion to be plated where a wiring portion formed in the wiring layer is conductive is formed on the substrate surface while being exposed. A board manufacturing step of manufacturing an electronic circuit board having a metallization layer for conduction connected to the part formed on a side surface,
A plating step of plating a portion to be plated of the electronic circuit board via the metallization layer and the wiring portion for energization,
It is characterized by including. According to this, it is possible to easily and reliably check for plating line omissions and the like at the design stage, so that plating defects and the like in the plating process are less likely to occur, and it is possible to improve the production yield of electronic circuit boards. it can.

The connection state between the objects or the connection state between the wiring net figure (or the object constituting the wiring figure) and the connection determination target area is determined, for example, whether there is a graphical overlap between the objects or between the object and the area. It can be determined based on whether or not. The detection of the overlapping state may be performed directly by detecting the intersection between the outlines of the figure, the reference points set in a certain figure, the positional relationship between the reference lines, or the position of one of the figures. It may be performed indirectly by grasping the positional relationship between the reference point or the reference line and the outline of the other figure.

The wiring net figure registration means,
Object connection determining means for determining whether the newly input object is connected to an object of the already registered wiring net figure,
When the object connection determining means determines that the object is connected, the object is incorporated into the wiring net figure, while when it is determined that the object is not connected, the object is registered as a new wiring net figure. And control means. According to this configuration, each time a newly drawn object is connected to another wiring net figure by connection between objects on the same layer or connection between different layers via vias, the processing is automatically integrated into this. Is performed. As a result, for example, the update process of the wiring net figure can be easily performed only by grasping the positional relationship between the currently drawn object and the created object closest to the drawn object.

In addition, the wiring net figure registration means,
Via connection determination means for determining whether the newly input via connects the already registered wiring net figures,
When the via connection determining means determines that the via connects the already registered wiring net figures, a registration control means for integrating them and registering them as one wiring net figure is provided. It can be configured as having. According to this configuration, when a wiring net graphic that is newly connected due to a newly input via graphic occurs, a process of automatically integrating them is performed. As a result, for example, the update processing of the wiring net figure can be easily performed only by grasping the positional relationship between the currently input via and the created object closest to the via.

The wiring net connection information generating means includes wiring net determining means for determining, among the wiring net figures, those connected to the energized connection area (connected net) and those not connected (non-connected net). The result may be generated as wiring net connection information. The wiring net figure connected to the current-carrying connection region represents a wiring net that is electrically connected to the current-carrying metallization layer via the plated wire portion. Therefore, based on the wiring net connection information including the above determination result, the operator can easily grasp, for example, the missing of the plating line of the wiring net.

In addition, the wiring net discriminating means is a normal connection net that satisfies a predetermined positional relationship with the energized connection area and is connected to the normal connection net, and is connected to this without satisfying the positional relationship. Can be distinguished from each other as abnormal connection nets. For example, in the wiring net figure, the connection portion (corresponding to the plating line portion) with the energized connection area is a linear figure area, and the wiring net discriminating means connects the connection part to the connection edge of the energized connection area. Are connected in an inclined state (oblique connection net) can be determined as an abnormal connection net. When the substrate is finished as a product, the edge on which the metallization layer for energization is formed is cut, but if the plating wire is obliquely conducted to the metallization layer for energization, the plating line portion generated by the cutting is cut off. Appears at a position different from, for example, the case of normal-angle conduction, which is a normal state. This means that, for example, when the substrate is assembled on another substrate, the conductive portion is exposed at an undesired position, which may lead to a problem such as a short circuit. Therefore, if the above configuration allows the oblique connection net to be detected, such a problem can be prevented beforehand.

The CAD system of the present invention
Net specifying information storage means for storing net specifying information for specifying each wiring net figure is provided,
The wiring net connection information generation means includes net specification information reading means for reading net specification information corresponding to either the connection net or the non-connection net from the net specification information storage means,
The wiring net connection information output unit may be configured to include a net specification information output unit that displays and / or prints out the contents of the read net specification information (for example, a net number or a net name). By displaying or printing the specific information of the connection net or the non-connection net, it becomes easy to grasp the net where the plating wire is not connected (or connected) to the energizing metallization layer. For example, which net should be corrected on the drawing screen Information can be obtained accurately.

Further, the CAD system of the present invention
Net image data storage means for storing net image data of a wiring net figure;
And a net figure image display means for displaying an image of the wiring net figure based on the net image data.
The wiring net connection information generation means includes a net figure image display control means for displaying, on the net figure image display means, an image of one of the connected nets or the non-connected nets in a state that can be distinguished from the image of the other. Can be configured. The image of one of the connected net and the non-connected net is not connected to the image of the other, for example, by changing the color, shading or brightness, or changing the fill pattern, etc., so that the plating wire is not connected to the energizing metallization layer (or The net to be connected) is literally self-explanatory on the screen, and, for example, information on which net should be corrected can be obtained very accurately.

In this case, the drawing screen display means can be used also as the net figure image display means for displaying the wiring net figure image on the drawing screen. Further, the net figure image display control means may make the display state of the non-connected net different from the display state of the connected net on the drawing screen. Further, on the drawing screen, a correction input means for correcting the figure of the non-connected net, and net image data for updating the content of the net image data to the corrected one based on the content of the correction input By providing the updating means, it is possible to immediately proceed to the work of correcting the wiring net figure immediately after grasping the non-connected net due to the difference in the display state, and the efficiency of the correction work can be greatly improved.

For example, in the case of a substrate having a quadrilateral shape in plan view, a metallization layer for energization is formed on a side surface corresponding to at least two sides of the substrate in consideration of the entrance and exit of the plating current. The reference region can be formed in a quadrilateral shape, and the energization connection region can be set corresponding to two or more of the four sides of the reference region (for example, all four sides). In this case, the wiring net determining means may be configured to determine a wiring net figure that is not connected to any of the energized connection areas as a non-connected net. As a result, it is possible to easily determine a missing plating line in the case of a quadrilateral substrate.

When the energizing metallization layers are formed on all four sides of the substrate, for example, the sides of the opposite side of the substrate may be sandwiched by energizing grips and the energization may be performed via the energizing metallization layers formed on the substrates. Can be carried out while maintaining the stability. In this case, a more uniform plating energization state can be obtained by energizing the plating via the energization metallization layer forming a pair between adjacent sides. In this case, one pair of the energizing metallization layers is insulated from the other pair, and the energizing metallization layers belonging to the same pair are electrically connected to each other by a wiring net extending between them (hereinafter referred to as a pair). Corner connection state) may be required. In this case, the CAD system
The wiring net determining means is
A wiring net graphic (hereinafter, referred to as a first diagonal connection net graphic) connected across two energized connection regions (hereinafter, referred to as a first connection region pair) corresponding to two specific adjacent sides of the four sides of the reference region. ) And a wiring net figure (hereinafter, referred to as a second diagonal connection net figure) connected across two current-carrying connection areas (hereinafter, referred to as a second connection area pair) corresponding to the remaining two sides. Diagonally connected net figure determining means for determining whether or not
Complementary diagonal connection net figure determining means for determining whether there is a connection net figure (hereinafter, referred to as a complementary diagonal connection net figure) connected across the first connection area pair and the second connection area pair With
A state in which both the first diagonal connection net graphic and the second diagonal connection net graphic are present and no complementary diagonal connection net graphic is present is regarded as a normal connection state. Based on the determination result of the connected net figure determining means and the complementary diagonal connected net figure determining means, information on whether or not the normal connection state is realized can be generated as wiring net connection information. . Thereby, it is possible to accurately determine whether or not the formation of the diagonal connection state is normal.

In some cases, a state (hereinafter, referred to as a four-sided connection state) in which the energizing metallization layers of all adjacent sides are electrically connected to each other by a wiring net extending over each of them may be required. In this case, the CAD system
When the wiring net discriminating means defines, as a diagonal connection net graphic, a wiring net graphic connected over two energized connection areas corresponding to two adjacent sides among the four sides of the reference area, Diagonal connection net figure determining means for determining whether a diagonal connection net figure exists for
The state in which the diagonal connection net graphic exists for all adjacent energized connection area pairs is regarded as a normal connection state, and the wiring net connection information generating means determines a normal state based on the determination result with the diagonal connection net graphic determination means. The information on whether or not the connection state is realized may be generated as the wiring net connection information.

Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings.
FIG. 2 is a block diagram showing an overall configuration of an embodiment of a CAD system 1 for designing an electronic circuit board (hereinafter, simply referred to as a CAD system) according to the present invention. The CAD system 1 includes a computer main body 12 including an I / O port 2 and a CPU 3, a ROM 4, a RAM 5 and the like connected to the I / O port 2. Input means such as a keyboard 6 or a mouse 7 as peripheral devices, a CD-ROM drive 8 or a floppy disk drive 9 or the like, a hard disk drive (hereinafter referred to as HDD) 10, a monitor 13 connected via a monitor control unit 11, a printer 14, etc. Have been built.

The CPU 3 includes a drawing layer setting unit, a region setting unit, a wiring net figure registration unit, a wiring net connection information generation unit, an object connection determination unit, a registration control unit, a via connection determination unit, a wiring net determination unit, and a net identification information readout. Means, net figure image display control means, net image data updating means, diagonal connection net figure determination means, complementary diagonal connection net figure determination means, element area setting means, etc. Drawing screen display means, object input means, via input means, wiring net graphic registration means, wiring net connection information output means, net specific information storage means, specific information reading means, net image data storage means, net graphic image display means , Correction input means, net image data updating means, element area setting data storage means, and the like. The keyboard 6 or the mouse 7 is a main body of the object input unit, the via input unit, and the correction input unit. The HDD 10 and the RAM 5 are essential parts of a net specifying information storage unit, a net image data storage unit, and an element area setting data storage unit. The monitor 13 functions as a drawing screen display unit, a net figure image display unit, a wiring net connection information output unit, and the like. The printer 14 functions as a wiring net connection information output unit and the like in addition to a drawing output unit that prints out a design drawing of an electronic circuit board on which drawing has been completed.

The HDD 10 stores an operating system program (hereinafter, referred to as OS) 61 and an application program (hereinafter, referred to as application) 62. The application 62 is a basic program for realizing the functions of the CAD system 1 and operates on the OS 61. This is stored in, for example, the CD-ROM 20 in a computer-readable state, and is installed using, for example, a dedicated installer program. The HDD 10 stores a data file 63 of the created drawing. On the other hand, a work memory 51 of the OS 61 and a work memory 52 of the application are formed in the RAM 5.

(3) As shown in FIG. 3, the application program 62 includes a control program 71, a drawing tool program 72, a check program 73, element area setting data 75, a display / output program 76, and the like. Among them, the control program 71 is a program for performing basic processing for causing a computer to function as the CAD system 1. Other programs complement the functions of the control program 71, and their roles will be described later. The ROM 4 stores various basic programs for hardware control of the computer system. When the application program 62 is started, the control program 71 is stored in the control program resident memory 52a formed in the application work memory 52, the drawing tool program 72 is stored in the drawing tool resident memory 52b, and the check program 73 is stored in the check program 73. The display / output program 76 is also loaded into the display / output program resident memory 52d. These resident memories function as work areas for the corresponding programs.

A drawing data memory 52f for storing drawing data, which is image data of a drawing being drawn, is formed in the work memory 52 of the application, and element area setting data 75 for drawing an element area described later. Is loaded into the element area setting data memory 52g. Further, a wiring net data registration memory 52i is formed in the RAM 5. FIG. 5 shows the contents, which will be described later in detail.

As shown in FIG. 4, the check program 73 includes a plated wire missing check module 73a, a diagonal continuity check module 73b, a four-side continuity check module 73c, and an abnormal net check module 73d.

Hereinafter, the operation of the CAD system 1 will be described in detail.
When the application program 62 shown in FIG. 3 is started, a drawing screen 40 is displayed on the monitor 13 (FIG. 2) by the control program 71 as shown in FIG. The application program 62 according to the present embodiment is constructed as draw-based graphic software in the same manner as a known CAD system. A drawing operation is performed while inputting a figure for each object. In the present embodiment, when the drawing screen 40 for a new drawing is started, the drawing screen 40 includes the outline of the main surface of the board to be designed and drawn based on the display data separately stored in the HDD 10 or the like. The corresponding quadrilateral reference area 51 and, as the default object figure, a figure of a portion to be plated formed on the substrate surface, for example, a figure 53 of a specific pin pad and a figure of a bonding pad 55 are displayed. In this case, a default object data storage unit for storing default object data in association with a product number is provided in, for example, the HDD 10, and the product number is input by using the keyboard 6 (or clicking a soft button on the screen with the mouse 7). It is convenient if the default object data to be read is read out and displayed on the drawing screen.

Here, the board to be designed is a package board or the like in which a plurality of wiring layers are stacked via an insulating layer. Then, by the operation of the control program 71, a plurality of drawing layers corresponding to the wiring layers to be formed are set on the drawing screen 40. These drawing layers (hereinafter also simply referred to as layers) cannot be visually discriminated because they overlap in FIG. 10A. Also, the graphics written in each layer are superimposed on the drawing screen 40, but only the graphics on a specific layer are displayed, or other colors are changed by changing the color, brightness, shading, and filling pattern. It is possible to make the display state different from the graphic on the layer.

FIG. 17 is a flowchart showing the flow of the drawing process. First, in S1, a layer in which an object is to be written is selected. This layer selection can be performed, for example, by clicking a soft button (not shown) for layer selection displayed on the screen with the mouse 7 (FIG. 2). The objects that can be input as graphics are the above-described objects and via graphics for connecting objects between different layers. In S2 and S8, which of them is selected is determined by command input. This command input can also be performed by mouse click of a soft button (not shown) for selecting object input or via input.

(4) When the object input is selected, the process proceeds from S2 to S3, and the object is drawn. When drawing an object, a drawing tool program 72 (FIG. 3) is prepared for each type of object to be drawn, such as wiring drawing and pad drawing, similarly to known CAD system software. The drawing tool can also be selected by clicking a drawing tool selection button (not shown) formed as a soft button on the screen with a mouse. Then, when a desired drawing tool is selected, as shown in FIG. 10B, the pointer P indicating the drawing position is moved by mouse operation, and the mouse is clicked or dragged (moving the mouse while holding down the mouse button). ) Draw objects while combining operations such as). The figure shows a state in which the graphic of the wiring section connecting the graphic 53 of each pin pad and the graphic of the bonding pad 55 has been drawn as an object.

As shown in FIG. 12B, every time one object is drawn, the object description data, which is its graphic data, is associated with the object specifying data (eg, object code) and the layer specifying data (eg, layer number). In the form, it is stored in the drawing data memory 52g of FIG. The object description data is, for example, vector data for defining the shape, size, and drawing position of the objects OB11, OB12, OB13, etc. on a coordinate plane set on the screen 40, as shown in FIG. , Functional formula data or coordinates of a specific reference point and a set of dimension definition data such as a radius and a length. For example, the object OB11 circulates in a predetermined direction (for example, clockwise) starting from the reference point A11 (x0, y0), and circulates A11 (x1, y1), A11 (x2, y2), A11 (x3, y3). , A11 (x0, y0) are represented as a data set of the coordinates of the end point of each vector when the outline of the object is drawn by connecting the vectors in the order of. The same applies to the object OB12. A circular object OB13 representing a pad or the like is represented as a data set of the center coordinate C13 and the radius r13. Although not shown, for example, a figure of a wiring portion having a constant width can be represented as a data set of the coordinates of the start position and the end position and the line width. In FIG. 12, all three objects OB11, OB12, and OB13 are drawn on the same layer (No. 1).

On the other hand, when the via input is selected in FIG. 17, the process proceeds to S9, and the via input process is performed. As shown in FIG. 13A, the via V connects the wiring portions W1 and W2 of different wiring layers. In the present embodiment, the input of the graphic of the via V is performed by, for example, using a pointer on the screen. Is adjusted to the position where the via is to be input, and the layer that is the start point of the via and the layer that is the end point are designated similarly. Then, as shown in FIG. 13B, the via graphic data includes via position data and layer identification information of the via start and end layers (via start layer: VSLY ##, via end layer: VELY #). #) Is stored in the drawing data memory 52f in a form associated with via specifying data (for example, via code).

Referring back to FIG. 17, when the object is drawn, the process proceeds to S4, and as shown in FIG. 14A, the input that partially overlaps (that is, is connected to) the input object OB12 in the same layer. It is determined whether there is a completed object OB11. If No, the process further advances to S5, and as shown in FIG. 15, it is determined whether or not another object OB31 is connected to another layer OB31 through a connection between different layers via the via VA11. If this is also No, the object OB12 is written as a wiring net figure, and only the object specifying information is written as net data with the net specifying information (eg, net number) added to the wiring net data registration memory 52i in FIG. Register

In the case of Yes in S4 or S5 in FIG. 17, the process proceeds to S7, in which the object is incorporated into the registered wiring net figure to which the object to be connected belongs, that is, the object specifying data of the newly drawn object is A process of adding to the corresponding net data in the wiring net data registration memory 52i is performed. In the case of connection using a via, the via specifying data is also added to the net specifying information. As shown in FIG. 5, in the wiring net data registration memory 52i, each of the net specifying information net1, net2,... And the specific data OB11, OB12,. Net data in which VA11, VA12,... Are associated with each other is stored.

On the other hand, as shown in FIG. 14B, when objects overlapping between different layers occur, the object specific data is not added to the overlapping destination net data. However, in S10 of FIG. 17, when wiring net figures connected to each other by the newly input via figure are generated, the process proceeds to S11, and the net data of those wiring net figures are integrated (merged). Is re-registered as net data of one wiring net figure. In this case, as the net specifying information, one corresponding to one of the wiring net figures before integration may be left, and the other may be deleted to be treated as a missing number. Net specifying information may be added.

When the drawing operation is completed after repeating the drawing input of the input of the object or the via as described above, the process proceeds from S12 to S13, and the data of the graphic stored in the drawing data memory 52g, that is, the drawing data, A file name is given together with the net data in the wiring net data registration memory 52i, and the file name is written and stored in the drawing data file 63 of the HDD 10 (FIG. 2). In the example shown in FIG. 11, thirteen wiring net figures N1 to N13 are formed in the created drawing.

The wiring net figure is registered as a regular net by merging a specific object. On the other hand, the wiring net figure in which the specific object is not merged is a dummy net figure and is different from the normal net figure. You may make it register separately. In this case, a figure representing a portion to be plated such as a bonding pad can be set as the specific object. Since a net that does not include a portion to be plated does not function as a plating conduction path, if it can be distinguished as a dummy net, there is an advantage that it becomes easier to grasp the formation state of the plating conduction path to each plating portion. Occurs.

For example, in FIG. 11, since each bonding pad 55 needs to be electrically insulated from each other, this is used as the specific object, and each regular net (N1 to N13 other than N7) is The information can be registered in a form associated with the bonding pads 55. In this case, the net N7 not connected to any of the bonding pads is a dummy net.

FIG. 23 is a flowchart showing the flow of the drawing process in this case. The basic part is substantially the same as that of FIG. 17, but differs in the following point. First, when an isolated object that is not connected to any of the drawn objects is drawn, this is first registered as a dummy net (S6c). When the drawn object is connected to the bonding pad, the net to which the drawn object belongs is re-registered as a regular net (S6b).

The created drawing can be printed out from the printer 14 based on the drawing data. On the other hand, it is also possible to output to the substrate manufacturing apparatus in the following manner.
(In case of multilayer ceramic substrate)
A wiring pattern is printed and formed by screen printing or the like using a metal paste on an unfired green sheet obtained by molding the ceramic raw material powder into a sheet shape. The via can be formed by forming a via hole in a green sheet and filling the via hole with a metal paste. Such a patterned green sheet is laminated and fired to obtain a ceramic substrate. In this case, for example, plate making can be performed directly by outputting drawing data to a screen printing plate making apparatus. Also, by outputting the drawing data to the via hole punching device, it is possible to directly punch the via hole in the green sheet.

(In case of plastic substrate)
It is manufactured by the same method as the printed wiring board. That is, a metal layer is formed on the surface of a plastic substrate on which each layer of the substrate is formed, and the surface is covered with a photoresist. On the other hand, a wiring pattern is printed on a photosensitive masking sheet made of transparent plastic or glass, and the wiring pattern is transferred to a photoresist layer by exposing and developing the wiring pattern on a base material. Next, the metal layer not covered with the resist is removed by etching, and the remaining metal layer is used as a wiring portion. A circuit board is obtained by laminating the substrates thus obtained. In this case, by outputting the drawing data to the pattern printing apparatus, it is possible to directly print the wiring pattern on the photosensitive masking sheet.

In addition, the obtained circuit board is plated on the part to be plated by forming an energizing metallization layer on the side surface and energizing through the wiring part, and further removing unnecessary parts as a final circuit board Complete.

Next, FIG. 18 is a flowchart showing the flow of the setting and checking processing of the element area. First, in S101, an element area is set on the drawing screen. The setting of the element area may be performed in the middle of drawing, or may be performed after drawing is completed. In FIG. 11, four rectangles representing energization metallization layers on the side surfaces of the substrate are shown, corresponding to each side of the reference region 51 representing the outline of the main surface of the substrate, in a manner in which the substrate to be designed is expanded and displayed. The energized connection regions T, L, B, and R are set as element regions, and figures representing those regions are displayed on the screen. The setting of the element area may be performed by using setting data of a standard element area prepared in advance (for example, data incorporated in the application program 62 as shown in FIG. 3), or the operator may perform drawing. The drawing may be performed on the screen using a tool. In either case, the element area setting data described in the same format as the graphic data of the object can be used. As shown in FIG. 3, the element area setting data is a part of the drawing data, and the element area setting data memory 52g formed in the drawing data memory 52f stores the element area name (element area specifying data). Is stored in a form associated with.

Step S102: The type of check to be performed is selected. This can be performed by, for example, opening a check type selection window 41 as shown in FIG. In the window 41, check names that can be executed are shown, and check selection soft buttons 42 for selecting whether or not to execute the check are displayed and formed. Then, as shown in FIG. 27B, an execution flag 43 corresponding to each check content is formed in the check program resident memory 52c of the RAM. Then, when the check type is selected by clicking the mouse of the check selection soft button 42, the corresponding execution flag is turned on (S103), and the corresponding check module (FIG. 4) is loaded.

In this case, for example, as shown in FIG. 11, a check execution button 43 is formed in the drawing screen 40, and the check is executed when the mouse is clicked on the drawing screen so that the user can immediately proceed from the drawing work to the check confirmation. It is convenient to keep it. Thus, the process proceeds from S104 to S105 in FIG. If the user wants to change the content of the check, the process returns from S104 to S102 via S108, and selects the check type again.

(4) The principle of the check method will be briefly described below. FIG. 16 is a somewhat simplified drawing of an example of the drawing drawn on the drawing screen, and four element regions (electrically connected regions) T, L, B, and R are provided in contact with each side of the reference region 51. (In this embodiment, each area is specified by the area numbers EA1 to EA4). In addition, it is assumed that seven wiring net figures a to g are registered (the net numbers Nn are 1 to 7). Whether or not these wiring net figures are connected to a certain element region is determined in exactly the same way as in the case of performing the connection determination between objects in the drawing process (FIG. 17) by regarding each element region as an object. be able to.

FIG. 19 shows the flow of the plating line omission check process. First, in S201 to S210, processing for searching for a net that is not connected to any of the element areas EA1 to EA4 is performed. For this search, a check flag group 152 shown in FIG. 6A is formed in the determination memory 52h of FIG. The flags F1 to F4 respectively correspond to the element areas EA1 to EA4. In S204 to S207, it is sequentially checked whether or not the currently focused net is connected to each element area. When not connected, the check flag corresponding to the element area is turned on. In step S208, as shown in FIG. 6B, if all the check flags are on (here, on is represented by “1” and off is represented by “0”), The net means a net that is not connected to any of the element areas EA1 to EA4.

For example, in FIG. 16, the nets connected to the specified element regions T, L, B, and R are {b, a}, {a, f}, {e, d}, and {d, c}, respectively. However, the net g is a wiring net that is not connected to any of the set element regions, that is, a wiring net from which a plating line is missing.

If such a plated wire missing net is detected, the process proceeds to S209 in FIG. 19, and the pass / fail judgment flag (formed in the judgment memory 52h in FIG. 3) is set to a rejected state (for example, off). At the same time, the net number is stored in the defective net memory (formed in the determination memory 52h of FIG. 3). The above processing of S203 to S208 is performed for all nets (S210, S211 → S202 flow).

(5) Then, the process proceeds to S212, where the content of the pass determination flag is read. If the status is a pass, the process proceeds to S214, and a pass (for example, “OK”) is displayed on the pass / fail display window 40a formed on the screen of the monitor 13, for example, as shown in FIG. On the other hand, in the case of rejection, the process proceeds to S215, where the contents of the defective net memory are read, and in S216, the rejection display and the display of the plating line missing net are performed. It is the display / output program 76 in FIG. 3 that controls this display / output processing. For example, in FIG. 24A, a pass / fail display (for example, “NG”) is displayed in the pass / fail display window 40a, and the wiring net figure N6 extracted as a missing plating line is displayed on the drawing screen by another color. It is indicated by making them different. In this case, the wiring net name can be displayed on a separate check result display window 45. On the other hand, in the example shown in FIG. 24B, a wiring net name display area 46 is formed near the extracted wiring net figure N6, and the wiring net name is displayed here. In any case, the operator sees the result and can immediately start the drawing correction work for eliminating the plating line missing state. Further, as shown in FIG. 25, a check result display screen 47 may be displayed separately from the drawing screen, and a wiring net name as a check result may be displayed here.

Next, FIG. 20 shows a diagonal continuity check, that is, one pair of energizing metallization layers is insulated from the other pair, and the energizing metallization layers belonging to the same pair are electrically connected by a wiring net extending therebetween. 3 shows a flow of a process for checking a state of being connected to. Here, as shown in FIG. 6D, a pair of energized connection regions T, L (first connection region pair: EA1, EA2) and B, R (second connection region pair: EA3, EA4) are respectively The wiring net figures (NE12 (first diagonal connection net figure) in the former case) and NE34 (second diagonal connection net figure) in the latter case are connected, and L, B (EA2, EA3) and R, T (EA4, EA1) is considered to be normal when it is not connected (that is, there is no complementary diagonal connection net).

First, in order to perform the above check, a flag table 153 shown in FIG. 6C is formed in the determination memory 52h of FIG. This means that each of the vertical and horizontal cell arrays corresponds to the connection areas EA1, EA3 and EA2, EA4, and the cells F12, F14, F23, F34 formed at the respective intersections have the corresponding connection area pairs. Turns on when connected by a net, and turns off when not connected. Therefore, if a normal diagonal conduction state is formed, a storage state as shown in FIG. 6E is formed.

Returning to FIG. 20, first, the flag table 153 is cleared in S301, and in S302 and S303, the first connection area pair and the second connection area pair are set. For example, as shown in FIG. 28, the area to be paired on the drawing screen can be selected with the pointer P by operating the mouse 7 (FIG. 2), and the above setting can be performed. Next, in S305 to S316, processing for determining the connection state of the net of interest is performed. That is, in S305 and S306, it is determined whether or not the net is connected to both the areas EA1 and EA2, and if so, the flag F12 of the flag table 153 is turned on. If the net is also connected to EA4, it is abnormal. Therefore, this is determined in S308, and if a connection is made, the corresponding flag F14 is turned on in S309, and the net number is determined to be bad in S310. Store in the net memory. Next, in S311 to S316, the same processing as described above is performed on the areas EA3 and EA4. The above process is repeated for all nets (S317, S318 → S305 flow).

(5) Then, the contents of the flag table 153 are checked in S319 and S321. That is, as shown in FIG. 6 (e), if F12 and F34 are on and F14 and F23 are off, it passes (S322), and otherwise fails (S320). FIG. 26B shows an example of a display in the case of a pass, in which a pass (OK) is displayed in the pass / fail display window 40a. On the other hand, when the diagonal connection net figure that should exist is not detected and the rejection is failed, for example, as shown in FIG. 26A, the rejection (NG) is displayed in the pass / fail display window 40a. The element areas (areas B and R in FIG. 26) in which the diagonal connection net graphic is missing can be notified by, for example, changing the color or the like. Also, when a prohibited diagonal connection net is detected, it is recognized by reading the storage contents of the defective net memory, and the wiring net figure is displayed in the same manner as when checking the plated wire missing net. Can be performed.

FIG. 21 shows a four-side continuity check, that is, as shown in FIG. 6 (f), the energizing metallization layers of all adjacent sides are respectively connected by wiring nets (NE12, NE23, NE34, NE41) extending over them. It shows the flow of processing for checking whether or not the state of electrical connection has been realized. Here, a flag table 153 (FIG. 6C) similar to the diagonal continuity check is used. In this case, if a normal diagonal conduction state is formed, a storage state as shown in FIG. 6G is formed.

21. Referring back to FIG. 21, the flag table 153 is cleared in S401, and the four energization connection areas EA1 to EA4 are set in S402. Next, in S404 to S413, processing for determining the connection state of the net of interest is performed. That is, in S404 to S408, it is determined whether or not the net is connected to the areas EA1 and EA2 or whether or not the net is connected to EA1 and EA4. If connected, the corresponding flag F12 in the flag table 153 is determined. , F14 are turned on. Next, in S409 to S413, it is determined whether or not the net is connected to the areas EA3 and EA4, or whether or not the net is connected to EA3 and EA2. If connected, the corresponding flag F34 in the flag table 153 is determined. , F23 are turned on. The above processing is repeated for all nets (S414, S415 → S404 flow).

Then, in S416, the contents of the flag table 153 are checked. That is, as shown in FIG. 6G, only when all the flags are on, the result is passed (S418), and in other cases, the result is failed (S417). As a display in the case of rejection, for example, as shown in FIG. 26A, rejection (NG) is displayed in the pass / fail display window 40a, and the element area where the diagonal connection net graphic is missing is notified. Can be adopted.

Finally, FIG. 22 shows a flow of a process for checking an abnormal net. In S505 to S508, it is sequentially checked whether or not the currently focused net is an abnormal net. In the present embodiment, processing is performed so that two types of checks, that is, whether or not the net is a diagonally connected net (S505) and whether or not the net is a net having two constituent points (S506), will be described later. (However, one of the checks may be omitted).

First, in the diagonal connection check in S505, it is checked whether the net is a net having an object such as a wiring obliquely connected to the element area of interest. For example, as shown in FIG. 7, in the case of an object of a wiring part specified by designating a starting point K1 and an ending point K2, the object is set in parallel with an edge corresponding to the element area of the reference area 51 (a side in this case). The reference vector B0B1 is set, and a scalar product of the vector K1K2 and the reference vector B0B1 is calculated. If the result is zero (or within a certain numerical range around zero), the connection is normal. Otherwise, it can be determined that the connection is diagonal.

Next, in the two-point check in S506, it is checked whether the net is a net having two-point objects. Hereinafter, the concept of the two constituent points and the technical background in which it is a problem will be described.

For example, when mass-producing a plastic substrate, as shown in FIG. 8A, a plurality of substrates B are collectively formed in one laminated sheet SH, and cut and divided to obtain individual substrates B. This is a common method. Here, there are two types of portions to be plated on each substrate B, one in which plating processing is performed after cutting and division, and one in which the plating is performed at the stage of the sheet SH before division. In the latter case, a conductive portion (hereinafter, referred to as a plating runner) PL for collective plating is formed on the laminated sheet SH, for example, along a boundary portion between individual substrate regions. Power is supplied to the portion from the plating runner PL via a wiring portion in the substrate B.

In this case, it is not sufficient that the plated wire formed in the wiring portion reaches the side surface of the substrate after cutting (that is, the metallization layer for energization), and is extended so as to be connected to the plating runner PL on the outside thereof. There must be. When designing by CAD, this can be handled as follows.

That is, as shown in FIG. 8B, an outer connection region H, which is one of the element regions, is set outside the energization connection region EA. In addition, the object data of each wiring portion includes the coordinates of the starting point position and the ending point position (line width data may be separately added to the line width, or the line width data may be omitted if the line width is constant). Is described as vector data. In this case, the plated wire is represented by an object PH of the wiring portion where the end point EP is located in the energized connection area EA. Then, when securing the connection to the plating runner PL, the end point EP of the object PH is moved to an arbitrary (or predetermined) position EP 'in the outer connection region H to extend the object PH. It should be noted that the CPU 3 in FIG. 2 functions as a main unit of the setting unit of the outer connection area H, the moving unit of the end point EP of the object PH, and the extension control unit of the wiring unit object PH. The movement of the end point EP can be performed by selecting a point to be moved and specifying a point position after the movement. For example, by operating the mouse 7, the point EP may be selected using the pointer P that moves on the screen, and the pointer P may be moved to specify the position after the movement.

By the way, the figure of the wiring pattern formed in the substrate is formed by connecting a plurality of wiring part objects L1, L2, etc., as shown in FIG. Here, depending on the type of the board, connection of the wiring part object except at the end point may be prohibited in order to define an electrical input / output system to the wiring part. In this case, on the CAD, when the connection point A2 is moved to another position A2 ', the two wiring part objects L1 and L2 sharing the connection point A2 are shared with the moved position A2'. It is convenient to add a function of expanding and contracting and / or moving (hereinafter, referred to as a connection point movement adjusting function) so as to perform the operation (in this case, the CPU 3 functions as a means for realizing the function). ).

Here, as shown in FIG. 9B, with respect to the wiring part object L1 where the end point A2 is located in the energized connection area EA, another wiring part object L2 sharing the end point A2 is moved in the extending direction of the object L1. If it exists, the following problem occurs when the wiring section object L1 is extended to the outer connection area H. That is, for the extension, it is necessary to move the end point A2 to a certain position A2 'in the outer connection area H. Since this is also the movement of the connection point A2, the above-described connection point movement adjustment function is simultaneously performed. Will work. At this time, the connected wiring section object L2 has a starting point A2 of A2 ', so that the ending point is also A2' and is a vector of zero length. In such a case, for example, if the function of prohibiting the drawing of a zero-length vector is set in CAD, an error may occur. The above-described wiring part object L2 which causes such an error is referred to as a two-component object.

Therefore, in S506 of FIG. 22, when another object is connected to the end point of the wiring part object whose starting point is in the reference area 51 and the end point is in the energized connection area EA, Is regarded as a two-point object, and a net including the object is detected as an abnormal net.

If an abnormal net as described above is detected in S505 or S506, the process proceeds to S507, and a pass / fail judgment flag (formed in the judgment memory 52h in FIG. 3) is set to a rejected state (for example, OFF), and The net number is stored in the defective net memory (formed in the determination memory 52h of FIG. 3). This abnormal net detection process is performed for all element areas for each net (flows of S509, 510 → S505), and is repeated for all nets (flows of S511, S512 → S503).

{5} Then, the process proceeds to S513, and the content of the pass determination flag is read. If it is in the pass state, the process proceeds to S517, and the pass is displayed. On the other hand, if the rejection has failed, the process proceeds to S515, where the contents of the defective net memory are read out, and a rejection display and an abnormal net display are performed in S516.

FIG. 2 is a partial perspective view illustrating an example of an electronic circuit board. FIG. 1 is a block diagram showing an electrical configuration of a CAD system for designing an electronic circuit board according to the present invention. A map showing the contents of the application program and the application work memory. Map showing the contents of the check program. A map showing the contents of the wiring net data registration memory. FIG. 4 is a conceptual diagram showing an example of a check flag together with its operation. Explanatory drawing which shows the determination calculation method of an oblique connection net. The figure which shows the manufacturing method of a plastic substrate, and the concept of the process of the wiring part object extension related to it. The figure which shows the outline | summary of connection point movement adjustment processing, and the problem when two component point objects exist. FIG. 5 is an explanatory diagram of an operation process on a drawing screen in the electronic circuit board designing CAD system of the present invention. Explanatory drawing following FIG. FIG. 2 is a conceptual diagram of an object and its graphic data. FIG. 3 is a conceptual diagram of a via graphic and its graphic data. FIG. 4 is an explanatory diagram of an overlapping connection state of objects. FIG. 4 is an explanatory diagram of a via connection state of an object. The figure explaining the concept of the set variable which has a wiring net figure as an element. 9 is a flowchart illustrating a flow of a drawing process. 9 is a flowchart showing the flow of an element area setting / check process. 9 is a flowchart showing the flow of a plating line missing check process. 9 is a flowchart illustrating a flow of a diagonal continuity check process. 9 is a flowchart illustrating a flow of a four-side continuity check process. 9 is a flowchart showing the flow of an abnormal net check process. 9 is a flowchart illustrating a flow of a drawing process when a dummy net is generated. FIG. 9 is an explanatory diagram showing some output examples of check results. FIG. 7 is an explanatory diagram showing another output example. FIG. 11 is an explanatory view showing still another output example. The figure which shows the example of a display of a check type selection window. The figure which shows the example of a display of the setting screen of a connection area pair.

Explanation of reference numerals

1 CAD system for electronic circuit board design 3 CPU (drawing layer setting means, area setting means, wiring net figure registration means,
Wiring net connection information generating means, object connection determining means, registration control means, via connection determining means, wiring net determining means, net specifying information reading means, net graphic image display control means, net image data updating means, diagonal connecting net graphic Determining means, complementary diagonal connection net figure determining means, element area setting means)
5 RAM (net specifying information storage means, net image data storage means, element area setting data storage means)
6 Keyboard 7 Mouse (Object input means, Via input means, Correction input means)
8 CD-ROM drive 10 Hard disk drive (net specifying information storage means, net image data storage means, element area setting data storage means, etc.)
12 Computer body 13 Monitor (Drawing screen display means, Net figure image display means, Wiring net connection information output means)
14 Printer (Wiring net connection information output means)
20 CD-ROM (recording medium)

Claims (14)

A plurality of wiring layers are stacked with an insulating layer interposed therebetween, and a portion to be plated through which wiring portions formed in the wiring layer are conductive is formed on the surface of the substrate while being exposed. CAD system for designing an electronic circuit board having a metallized layer formed on a side surface,
A drawing screen display means for displaying a drawing screen of a wiring pattern figure which is a figure of a wiring portion or a portion to be plated;
Drawing layer setting means for setting a plurality of drawing layers corresponding to wiring layers to be formed in the substrate on the drawing screen;
Object input means for inputting an object which is a drawing unit of the wiring pattern figure to the drawing layer,
Via input means for inputting a figure of a via connecting wiring portions between different wiring layers to a drawing layer corresponding to the wiring layer;
A reference region corresponding to the outer shape of the main surface of the substrate, and a connection determination target region formed outside the reference region in a form including a conduction connection region corresponding to the conduction metallization layer, with respect to the drawing screen. Area setting means for setting
Register a plurality of objects connected in a connected state on the same drawing layer or objects connected between the different drawing layers via the via graphic as an integrated wiring net figure Wiring net figure registration means to be
Wiring net connection information generating means for generating information on a connection state between the wiring net graphic and the energized connection area based on the positional relationship between the registered wiring net graphic and the connection determination target area;
Wiring net connection information output means for outputting the generated wiring net connection information;
A CAD system for designing an electronic circuit board, comprising: The wiring net figure registration means,
Object connection determining means for determining whether the newly input object is connected to an object of the already registered wiring net figure,
When the object connection determining means determines that the object is connected, the object is incorporated into the wiring net figure, while when it is determined that the object is not connected, the object is registered as a new wiring net figure. The CAD system for designing an electronic circuit board according to claim 1, further comprising a control unit. The wiring net figure registration means,
Via connection determination means for determining whether the newly input via connects the already registered wiring net figures,
When the via connection determining means determines that the via connects the already registered wiring net figures, a registration control means for integrating them and registering them as one wiring net figure. The CAD system for electronic circuit board design according to claim 1 or 2, further comprising: The wiring net connection information generating means determines which of the wiring net figures is connected to the energized connection area (hereinafter referred to as a connection net) and which is not (hereinafter referred to as a non-connection net). 4. The CAD system for designing an electronic circuit board according to claim 1, further comprising a wiring net determination unit, wherein the determination result is generated as the wiring net connection information. The wiring net discriminating means is a normal connection net that satisfies a predetermined positional relationship with the current-carrying connection area and is connected to the normal connection net, and is connected to the normal connection net without satisfying the positional relation. The CAD system for designing an electronic circuit board according to claim 4, wherein the abnormal connection net can be distinguished from each other in a distinguished state. In the wiring net graphic, a connection portion with the energized connection region is a linear graphic region, and the wiring net determination means connects the connection portion in an inclined state to a connection edge of the energized connection region. 6. The CAD system for designing an electronic circuit board according to claim 5, wherein the system that determines the abnormal connection net is determined as the abnormal connection net. Net specifying information storage means for storing net specifying information for specifying each wiring net figure is provided,
The wiring net connection information generation unit includes a net specification information reading unit that reads net specification information corresponding to either the connection net or the non-connection net from the net specification information storage unit,
7. The electronic circuit board design according to claim 4, wherein the wiring net connection information output unit includes a net specification information output unit that displays and / or prints out the content of the read net specification information. CAD system. Net image data storage means for storing net image data of the wiring net figure;
And a net figure image display means for displaying an image of the wiring net figure based on the net image data.
The wiring net connection information generating means, the net graphic image display control means for causing the net graphic image display means to display an image of one of the connected net and the non-connected net so as to be distinguishable from an image of the other one; The CAD system for designing an electronic circuit board according to any one of claims 4 to 7, comprising: The drawing screen display means is also used as the net figure image display means to display the wiring net figure image on the drawing screen,
The net figure image display control means is configured to make the display state of the non-connected net different from the display state of the connected net on the drawing screen,
Further, on the drawing screen, correction input means for correcting the figure of the non-connected net,
9. The CAD system for designing an electronic circuit board according to claim 8, further comprising: a net image data updating means for updating the content of said net image data to a corrected one based on the content of said correction input. The reference area is formed in a quadrilateral shape,
The energization connection region is formed corresponding to two or more of the four sides of the reference region,
10. The CAD system for designing an electronic circuit board according to claim 4, wherein said wiring net determining means determines a wiring net figure which is not connected to any of said energized connection areas as said non-connected net. The reference area is formed in a quadrilateral shape,
The energization connection area is formed corresponding to all four sides of the reference area,
The wiring net determining means includes:
A wiring net graphic (hereinafter, referred to as a first diagonal connection net graphic) connected across two conductive connection areas (hereinafter, referred to as a first connection area pair) corresponding to two specific adjacent sides of the four sides of the reference area. ) And a wiring net figure (hereinafter, referred to as a second diagonal connection net figure) connected across two current-carrying connection areas (hereinafter, referred to as a second connection area pair) corresponding to the remaining two sides. Diagonal connection net figure determining means for determining whether or not
A complementary diagonal connection net figure for determining whether or not there is a connection net figure (hereinafter, referred to as a complementary diagonal connection net figure) connecting between the first connection area pair and the second connection area pair. Determination means,
The wiring net connection information generating unit sets a state in which both the first diagonal connection net graphic and the second diagonal connection net graphic exist and the absence of the complementary diagonal connection net graphic as a normal connection state. And generating, as the wiring net connection information, information on whether or not the normal connection state is realized, based on the determination results of the diagonal connection net graphic determination means and the complementary diagonal connection net graphic determination means. The CAD system for designing an electronic circuit board according to claim 4. The reference area is formed in a quadrilateral shape,
The energization connection area is formed corresponding to all four sides of the reference area,
The wiring net discriminating means, when defining a wiring net figure connected over two energized connection areas corresponding to two adjacent sides among the four sides of the reference area as a diagonal connection net figure, A diagonal connection net figure determining means for determining whether or not the diagonal connection net figure exists for a pair of adjacent energized connection areas,
The state in which the diagonal connection net figure is present for all adjacent energized connection area pairs is regarded as a normal connection state, and the wiring net connection information generating unit is configured to perform the processing based on the determination result with the diagonal connection net figure determination unit. 12. The CAD system for designing an electronic circuit board according to claim 4, wherein information relating to whether or not the normal connection state is realized is generated as the wiring net connection information. (13) A recording medium storing a computer-readable program for causing a computer to function as each unit constituting the electronic circuit control board design CAD system according to any one of (1) to (12). A board designing step of drawing a wiring pattern figure of an intended electronic circuit board by using the electronic circuit board designing CAD system according to any one of claims 1 to 12.
In accordance with the design contents, a plurality of wiring layers are stacked via an insulating layer, and a portion to be plated where a wiring portion formed in the wiring layer is conductive is formed on the substrate surface while being exposed. A board manufacturing step of manufacturing an electronic circuit board having a metallization layer for conduction connected to the part formed on a side surface,
A plating step of plating the plated portion of the electronic circuit board via the metallization layer and the wiring portion for energization;
A method for manufacturing an electronic circuit board, comprising:

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