JPS6058642A - System of wire width enlargement for printed circuit board - Google Patents

Abstract

PURPOSE:To enable the automatic enlargement of the wiring width by a method wherein a memory incorporating a net table region, a connecting information region, and a wire width enlargement program region, and a wire width enlargement information table region is controlled by a microprocessor, and the wiring width at a desired position of a wiring provided on a printed substrate is enlarged in plane or in three dimensions by these regions. CONSTITUTION:The four regions 5-8 are provided in the memory 2. The region 5 of these is the net table of each net combined with lines, and the region 6 is a region in which the classification of pattern such as a forbidden region, a wide band pattern region, a line, and a land and their co-ordinates, the shape of the land, the line width, the minimum interval, and the like are stored. The region 7 is a region allowed to have wire width enlargement programs, and the region 8 is a region determining whether or not the wire width is enlarged in every net. Constructed in such a manner, the memory 2 is controlled by the microprocessor 1, the control thereof being instructed through a keyboard, and the result of enlargement is indicated by a display 3.

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention uses computer-aided design (hereinafter referred to as CAD) to automatically expand the line width of nets connected by lines after completing printed board pattern design. This article relates to a method for expanding the line width of printed boards.

(b) Background of the Technology On printed circuit boards for analog circuits, there are cases where it is desired to make the line width as wide as possible or as wide as possible for electrical function.

Also, when the printed circuit board pattern is designed and completed using CAD, a net table for each net connected by a lie is stored in the memory.
8 - Insertion of camellia - The memory also has a connection information storage area that stores coordinate information indicating the shape and position of each pattern, as well as line width and minimum spacing information. You can now draw patterns.

(e) Conventional technology and problems When designing a printed board pattern using CAD, the line width is uniform, so to enlarge the line width,
In the past, once the design was completed, the coordinates of one point for expansion were specified manually.

This work has the drawback that it requires a large number of points and requires manpower and time.

(d) Object of the Invention In view of the above-mentioned drawbacks, the object of the present invention is to provide a method for automatically expanding the line width of a printed board, which can be performed automatically.

(e) Structure of the Invention In order to achieve the above-mentioned object, the present invention has the following objectives: When expanding the line width of the net line connected by the line after completing the no (turn design) of the printed board in the computer Hinesuke design, the present invention A line width expansion information table containing the priority of whether or not to expand the line width for each net in the stored net table, the maximum expansion for the net to be expanded, and the priority indicating the expansion ratio between adjacent parallel patterns. If you create this in the memory and issue a line width expansion command, the net table and line width expansion information table will be automatically referred to and the line width will be expanded in the order of the nets written in the net table. When reading out and enlarging the priority, find the position on the net closest to the origin, read out the maximum expansion of the line, and memorize information indicating the shape and position of each pattern, as well as information on line width and minimum spacing. Lines are expanded from the current connection information storage area, and the position information and minimum spacing information of the points with the smallest spacing and shape change points of each adjacent pattern are read out, and the line is being expanded to the maximum in the X-axis and Y-axis directions according to this information. The present invention is characterized in that the computer is equipped with means for updating the contents of the connection information storage area of the line width enlarged line based on the locus of points satisfying the specified enlargement ratio and minimum interval.

(f) Examples of the invention Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a block diagram of the main parts of a CAD device according to an embodiment of the present invention, Fig. 2 is a pattern diagram of a printed board for enlarging the line width as an example, and Fig. 3 shows the line width of line Yllll in Fig. 2. It is a flowchart figure when expanding downward.

In Figure 1, 1 is the processor (hereinafter referred to as CPU), 2 is the memory, 3 is the display, 4 is the keyboard, 5 is the net table of each net connected by a line, and 8 is the line width of each net. Whether to enlarge or not (if not to enlarge, indicate O; if to enlarge, indicate priority with a value greater than 0); if to enlarge, indicate the priority during maximum expansion and the enlargement ratio between parallel patterns on the keyboard 4. Width expansion information table area, 6 is a connection that stores pattern information such as prohibited area, wide area pattern area, line, land, etc. turn types and their coordinates, land shape, line width, minimum interval, etc. In the information area, 7 is a priority for expanding the line width in the order of the nets written in the net table by referring to the net table in area 5 and the line width expansion information table in area 8 when line enlargement is instructed by the keyboard 4. When reading out and enlarging the line (priority>0), find the position on the net closest to the origin, and read out the maximum expansion of the line using the connection information in area 6. Read out the positional information and minimum interval information of the points with the smallest intervals and points of change in the shape of the turn, and according to this, during maximum expansion in the X-orbit and Y-axis directions,
A line width expansion program area in FIG. 2 that stores a line width expansion program that updates the contents of the line width expansion line in the line connection information of area 7 by finding the locus of points that satisfy the specified expansion ratio and minimum interval. yll+'l'2 is a line, 9 is a round land, the coordinates of the center point A are xAO#7AO, and the radius is r
It is. 10 is a corner land and Bl each corner from the bottom left.

B2 # B3 r B4 and their coordinates are (xB
l, yat )+(XB2 #)'B2 L (XB3
*ya3)#(Xs4T)'B4). ml is the line specified on keyboard 4
During the maximum expansion of
If given, the line yl,・y! W at maximum expansion of 2
3/W2=3/2 A large number 811 indicates a wide area pattern.

Next, an explanation will be given using an example in which the line width of line y/10 of the printed board shown in FIG. 2 is enlarged downward using the CAD device shown in FIG. 1.

First, from the keyboard 4, give priority and maximum expansion ml to the net of line y11 in the area 80 line width expansion information table, and give an expansion ratio of 3:2 to each net of line V'1+y/2. .

Next, when you issue a command to expand the υ line width from keyboard 4, the CPU
reads the line width expansion program in area 7 and performs the following operations. ``Line yl whose line width is to be expanded from the net table of area 5 and the line width expansion information table of area 8''
and related maximum expansion m1 life '111
+y12 expansion ratio 3:2″1 is determined, and from the connection information of area 6, line N1+y12 + shape and coordinates of wide area pattern 8, coordinates of the center point of round land 9, XAo+7A,
0, radius r, each corner of corner land 1o B11B21B31
Each coordinate of B4 (XBII)'81)t'XB213'
B2 ) + ()rB3+3'83 ), (X8417
84) and the minimum interval d, find the position a of the line y11 closest to the origin, and find the locus of line width expansion. Since the maximum expansion width of point A is ml, the starting point is P(x,
1 and the X coordinate of the center point A of Nine Land 9 in the X direction.
AO] Find the trajectory to the X coordinate point A by subtracting the sum of the radius r and the minimum distance d of the round land, and then find the trajectory in the X direction to the mouth point of the y coordinate yAo of the center point A of the round land 9. Next, let's move from the center point A of round land 9 to the coordinates of round land 9 "AO+3'A (
1. Find a trajectory on the circumference whose radius is the sum of the radius r and the minimum distance d to the y-coordinate point C, which is the sum of the minimum distance d and the y-coordinate 7B4 of the corner B4 of the corner land 10, and then move in the X direction. corner land 1
0's X coordinate of corner B3 XB3 The following is the coordinate of corner B3 of corner land 10.
A locus of larger x and y coordinates is found up to point E on W3 during the maximum expansion of the line y11, and then is found on the y coordinate of W3 during the maximum expansion up to point E.

The minimum distance d in the X-axis and Y-axis directions from each important point of the line y11 and the pattern adjacent to it that is expanded in this way.
, finding a locus as shown by the dotted line in FIG.
Change the shape and position information of.

In this way, if you input only the necessary specification data into the line width expansion information table in area 8 from the keyboard 4 and create the line width expansion information table in advance, all you need to do is run the expansion program and the computer will do the rest. Automatically expands the line width.

(g) Effects of the Invention As explained in detail above, according to the present invention, after the CAD printed board pattern design is completed, the line width of the connected net is automatically expanded, so that the line width of the printed board can be expanded. This has the effect of saving time and effort.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the main parts of a CAD device according to an embodiment of the present invention, Fig. 2 is a pattern diagram of a printed board that enlarges the line width as an example, and Fig. 3 shows the line width of line y11 in Fig. 2. It is a flowchart figure when expanding downward. In the figure, 1 is a processor, 2 is a memory, 3 is a display,
4 is a keyboard, 5 is a net cheap area, 6 is a wiring information area, 7 is a line width expansion program area, 8 is a line width expansion information table, 9 is a round land, 10 is a corner land, and 11 is a wide area pattern.

Claims (1)

[Claims] When expanding the line width of the lines of nets connected by lines after completing the printed board pattern design using computer-aided design, the line width is expanded for each net in the net table stored in memory. The priority is whether or not to do it, and we are expanding to the maximum in order to accommodate the expanding network. A line width enlargement information table in which priorities indicating enlargement ratios between adjacent parallel patterns are written is created in the memory, and when a line width enlargement command is issued, the net table and the line width enlargement information table are automatically created. , read out the priority for expanding the line width in the order of the nets written in the net table, and when expanding, find the position on the net closest to the origin, and read out the maximum expansion of the line,
There is also a connection information recorder that stores information indicating the shape and position of each pattern, as well as information on lines and minimum spacing. h
Read out the positional information and minimum interval information of the points with the smallest spacing and points of change in shape of each pattern, and according to this read out the maximum expansion in the X-axis and Y-axis directions. , a line of a printed board, characterized in that a computer is provided with means for updating the contents of the connection information storage area of the line with enlarged line width based on the locus of points that satisfy a specified enlargement ratio and minimum interval. Expansion method.