JPH04567A - How to create relative coordinate system Gerber data on printed circuit boards - Google Patents

Abstract

PURPOSE:To attain rapid processing by holding data to be frequently repeated as garb data referred from a parts table, repeatedly using the stored data and preparing garb data. CONSTITUTION:A garb data preparing part 4 reads out a number indicating a diameter or the like and coordinate data from an art word data 1 and converts line width into a line width specifying number and the start and end coordinates of a wiring into relative coordinates. When two or more identical coordinate intervals are continued, the parts table 2 is referred, and when the parts of pin interval 1270 are detected as garb data expressed by relative coordinate from a reference position, a data preparing part 4 extracts the garb data and stores as the garb data 4-4 of the parts. A garb data preparing processing part 4-5 forms the garb data 5 of the whole printed board from the coordinate data, the garb data of the parts and the garb data extracted from the garb data table.

Description

[Detailed Description of the Invention] [Summary] Regarding a relative coordinate system Gerber data creation method for creating printed circuit boards by computer processing, the present invention aims to efficiently convert frequently repeated pattern data such as IC parts into Gerber data. Relative coordinate system Gerber data to convert printed circuit board pattern creation data expressed in an absolute coordinate system into Gerber data in which the positional relationship between two points is expressed in relative coordinates with one point as a reference. In the creation method, coordinate intervals are determined from a parts table that has Gerber data for each type of part associated with the part and coordinate data in pattern creation data, and two or more consecutive coordinate intervals are the same. In this case, a component determination unit is provided that determines that the coordinate data is coordinate data regarding a component,
When it is determined that the pattern creation data is a part, the part table is referred to, the corresponding Gerber data is extracted, and the Gerber data for that part is created.

[Industrial Field of Application] The present invention relates to a method for creating relative coordinate system Gerber data for a pattern on a printed circuit board.

Artwork data that defines the land position, size, wiring pattern position, line width, etc. in an absolute coordinate system to create a printed circuit board is used to create and display patterns using Ell processing, or automatically insert parts. The method of converting to relative coordinate system Gerber data for performing such operations is the same method without distinguishing between component data such as insertion holes of IC components and land data related only to wiring.

Therefore, conventionally, even when the same pattern is repeated as in the case of IC parts, the coordinates and land shape are calculated for each coordinate of the artwork data, just as in the case of creating Gerber data for land data for wiring. etc. were converted one by one into Gerber data.

Therefore, when there are a large number of IC parts or the like in which the same data is often repeated, the conversion efficiency to Gerber data is poor.

The present invention relates to a method for efficiently converting artwork data with many repetitions, such as IC component patterns, into Gerber data in a relative coordinate system.

[Conventional technology]

An example of the printed circuit board pattern is shown in FIG.

As shown in the figure, the X axis, Y axis, and coordinate origin are determined. And the artwork data (pattern creation data) is
At that coordinate position, land (number 2 on the printed circuit board)
2.36, etc.) and straight lines (number 8 on printed circuit boards)
etc.), it is created by specifying the shape of the land, the width of the straight line, etc.

In the figure, equally spaced lands represented by numbers 9 to 20 on the printed circuit board correspond to electronic components.

FIG. 4 shows an example of artwork data and Gerber data.

In the figure, 41 is artwork data and 42 is Gerber data.

As shown in the figure, the artwork data 41 includes numbers indicating the diameter, etc., and coordinate data (1000
,1270,1270), (1000,2540,
1270), (1000, 3810, 1270) ・
..., and the line width is represented by the line width specification number, the starting point coordinates and ending point coordinates (200, 1270, 1270, 2
540, 1270)...etc.

In the illustrated Gerber data 42, rGOI J is linear interpolation, rG55J is exposure, rX1270Y1270J
is the X direction, moving 1270 at seat 1 in the X direction, rD
OIJ stands for shunter open, rp02 stands for shutter close, and rDO3J stands for shutter open/close, which means that after moving to X1270Y1270, a straight line is drawn in the X direction and the number of coordinates is 1270 in the X direction.

rX1270YODO2*..." means 127 in the X direction.
After moving 0, the land is repeatedly exposed, which means that the land exposure of one component is repeated.

A conventional method for creating Gerber data is shown in FIG.

A conventional Gerber data creation method will be explained according to the numbers shown.

(51) Input artwork data using input means such as a keyboard.

(52) From artwork data such as lands and wiring,
For lands, coordinates, diameter, etc. For wiring, coordinate data of start and end points, line width, type of pattern such as straight line, curve, etc. For component data, data such as spacing between insertion holes for component lead wires, etc. Convert to relative coordinates,
For item data such as lands, data for each land is G.

For data regarding line segments, Gerber data is created by referring to a Gerber data table having associated Gerber data expressed by D or the like (Gerber data conversion).

(53) Output the Gerber data to a data storage unit such as memory.

(54) After creating Gerber data for all artwork data, end the process.

[Problem to be solved by the invention] As mentioned above, in parts such as ■C, the same data is repeated after the reference pin of the part, and moreover, the artwork data is a 2-bit numerical expression. (For example, according to the example of the land in Figure 4, the number 1000 and the coordinate value 1270.1270 determine the shape and size of the land). On the other hand, Gerber data is a character expression, so it takes time to convert. Therefore, in the past, inefficient conversion was repeatedly performed for each coordinate, which was a wasteful process.

An object of the present invention is to eliminate repetitive processing for data regarding parts and to efficiently perform guard data conversion.

[Means to solve the problem]

The present invention prepares a parts table that has Gerber data about the parts in association with the parts, reads the coordinate interval from the coordinate data in the artwork data, and when the coordinate interval is the same twice, the data is used for the part. Refer to the parts table as it is likely to be the one.

If the read data is found in the parts table,
Output the Gerber data of the corresponding part.

The basic configuration of the present invention will be explained with reference to FIG.

In the figure, 1 is artwork data (pattern creation data), 2 is a parts table in which Gerber data determined for each type of part corresponds to each part, and the reference pin of the part is the origin of relative coordinates. 3 is a Gerber data table that defines Gerber data for pattern types, etc. 4 is a Gerber data table that creates Gerber data by referring to Gerber data table 3 or parts table 2 from artwork data. Data creation section, 4-1 is a process of converting the coordinate values of artwork data into relative coordinates, 4-2 is a process of detecting the same coordinate interval, 4-3 is data on the number of repetitions of the same coordinate interval, 4 -4 is the Gerber data of the part taken out from the parts table and is used repeatedly for the number of insertion holes of the part, 4-5 is the Gerber data 5 created from the part Gerber data or the Gerber data taken out from the Gerber data table. A Gerber data creation processing unit 5 is an example of created Gerber data. The Gerber data creation unit 4 is a component determining unit that reads coordinate intervals from the coordinate data, and when two or more same coordinate intervals continue, refers to the component table 2 and extracts the corresponding Gerber data as component data.

[Effect]

The operation of the basic configuration shown in FIG. 1 will be explained.

From the artwork data 1, the Gerber data creation unit 4 generates numbers indicating the diameter, etc., and coordinate data (1000, 1270, 1270), (1000, 2) for the lands.
540,1270), (1000,3810,1270
)..., and for the line width, enter the line width designation number, the starting point coordinates and ending point coordinates (200, 1270, 12
70, 2540, 1270) etc.

Then, convert the read coordinate data to relative coordinates (
4-1).

As a result, if two or more same coordinate intervals are consecutive, (
If there are two consecutive coordinate intervals 1270 (as in the illustrated example), it is determined that the coordinates are likely to be coordinates for a component, and component table 2 is referred to.

Referring to parts table 2, parts with a pin interval of 1270 are expressed in Gerber data rX1 in relative coordinates based on the reference position.
When it is found that the part is 270YO book J, the Gerber data creation unit 4 extracts the Gerber data and stores it as part Gerber data 4-4.

The Gerber data creation processing unit 4-5 creates Gerber data 5 for the entire printed circuit board using the coordinate data, the Gerber data of the parts, and the Gerber data extracted from the Gerber data table.

In the illustrated Gerber data 42, rGOI J is linear interpolation, rG55J is exposure, rX1270Y1270J
is 1270 coordinates in the X direction and Y direction, rDOI
J stands for shutter open, rp02'' stands for shutter closed, and rDO3'' stands for shunter open/close, which means that after moving to χ1270Y1270, a straight line is drawn by the number of coordinates 1270 in the X direction and Y direction.

rX1270YODO2*...J is 127 in the X direction
After moving 0, the land is repeatedly exposed, which means that the land exposure of one component is repeated.

Note that reading the repetition number data (4-3) is not necessarily necessary, and the Gerber data (4-4) of the part may be repeatedly used each time the coordinates are read.

〔Example〕

The present invention will be explained in detail with reference to FIG.

Figure (a) shows the flow of Gerber data creation processing.

The flow will be explained in the order of the numbers shown.

(11) Read the artwork data.

(12) Convert the read data into relative coordinates, determine coordinate interval data, and process to determine whether the coordinates are the coordinates of a part.

(13) As a result, if it is determined that it is coordinate data, a parts table reference process is performed, and if it is determined that it is not part data, it is converted into predetermined Gerber data.

(14), (16) If it is determined to be a part in (13), refer to the parts table, use the coordinate interval as a parameter, if there is corresponding data, extract the corresponding Gerber data, and process the part Gerber data creation process. (17
), and if data corresponding to the parts table is not found, it is not part data, and the Gerber data creation process (18) is performed with reference to the Gerber data table.

If the coordinate intervals are different in (13) and it is determined that it is not a part, the Gerber data table is referred to in (1st day) and data is created.

(19) Output the created Gerber data to a storage unit such as memory.

(20) If it is determined that all artwork data has been read, the process ends.

FIG. 2(b) shows the flow of the component determination process 12 in FIG. 2(a).

The flow will be explained according to the illustrated numbers.

(21) Read the coordinate data of the land, etc. from the artwork data.

(22) Determine whether the three points are lined up in a straight line with the same spacing.

(23) If three points are lined up in a straight line with the same spacing, a flag is set.

(24) Further read the coordinate data, and if they are at the same interval, determine whether or not the pin flag is set in the read data.

(25) Since the data with the pin flag set is data determined to be a component pin, the process proceeds to component reference processing.

(24), (26) If the read data is not lined up at the same intervals from the beginning, the flag is not set, so it is determined that it is not a component pin, and the process proceeds to the Gerber data creation processing section.

(Effects of the Invention) According to the present invention, for data that is frequently repeated such as IC parts, Gerber data pulled from the parts table is held and is repeatedly used to create Gerber data, so it can be processed. becomes faster.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the basic configuration of the present invention. FIG. 2 is a diagram showing an embodiment of the present invention. FIG. 3 is a diagram showing an example of a printed circuit board pattern, and FIG. 4 is a diagram showing an example of artwork data and cover data. FIG. 5 is a diagram showing the flow of a conventional Gerber data creation method. 4-3=Repetition number data 4-4: Gerber data of parts, 4-5 Gerber data creation processing section. Patent applicant: PF Co., Ltd., Patent Attorney
In the figure by Fumihiro Hase (two others), 1: Artwork data, 2: Parts table, 3 Nigga bar data table, 4 Nigga bar data creation section, 5 Nigga bar data, 4-1: Relative coordinate conversion processing , 4-2 Two-coordinate interval determination process, Example of printed circuit board pattern Figure 3 ψ of artwork data and cover data Figure 4

Claims (1)

[Claims] Relative coordinates for converting printed circuit board pattern creation data expressed in an absolute coordinate system into Gerber data in which the positional relationship between two points is expressed in relative coordinates with one point as a reference. In the system Gerber data creation method, coordinate intervals are determined from a parts table that has Gerber data for each type of part associated with the part and coordinate data in pattern creation data, and two or more coordinate intervals are determined in a row. If the coordinate data are the same, a component determination means is provided which determines that the coordinate data is coordinate data for a component, and if it is determined that the pattern creation data is a component, the part determination means refers to the component table. , a method for creating relative coordinate system Gerber data on a printed circuit board, the method comprising: extracting corresponding Gerber data and creating Gerber data for the component.