JPH01115508A - Numerically controlled borer - Google Patents

Abstract

PURPOSE:To form reference holes in a borer for boring the reference pin holes for pressing a printed board by determining positions separated from a midpoint between target patterns by a distance equivalent to 1/2 of a specified interval value so as to bore the patterns thereat, and distributing pattern error, if any, to the whole. CONSTITUTION:The borer in the caption determines a midpoint 0 between the respective central coordinates X1, X2 of target patterns 33, 34, and then, it determines positions Q1, Q2 separated from the midpoint 0 by a distance equivalent to 1/2 of a specified interval (l) on a line for connecting together the respective central coordinates X1, X2, thereby boring work is carried out in these positions. These reference pin holes 38, 39 serve as reference holes in the next process. Therefore, without any misalignment of a pair of the target patterns 33, 34, the reference pin holes 38, 39 may be formed on the central coordinate points of the target patterns 33, 34, respectively. Meanwhile, with any misalignment in the target patterns 33, 34 the reference pin holes 38, 39 are formed in the positions Q1, Q2 deviated by 1/2 of the error quantity of the pattern misalignment, respectively, with the specified interval (l) kept precise ly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a numerically controlled drilling device used, for example, to form reference pin holes for pressing into printed circuit board materials.

[Summary of the invention]

The present invention is a numerically controlled drilling device that forms a pair of reference holes in a substrate on which a desired pattern is formed, in which the coordinates of each of a pair of targets/(turns) formed on the substrate are detected, and the coordinates of each target/(turn) are detected. Find the midpoint between the coordinates of
By finding the positions corresponding to each, moving these positions to the position of the hole-drilling means, and drilling holes, it is possible to distribute the errors caused by pattern deviation during pattern formation to the entire pattern, and to machine a pair of reference holes with high precision. This is how it was done.

[Conventional technology]

For example, a printed circuit board with a circuit pattern formed thereon is manufactured as follows. FIG. 5 shows an example of this. First, a pair of reference pin holes (2) and (3) for pressing are formed in a prepared copper-clad board (1) (FIG. 5A). Next, a resist pattern corresponding to the circuit pattern is formed on the copper layer by screen printing, and then the copper layer is selectively etched using the resist pattern as a mask to form a circuit pattern (4) (FIG. 5B). Next, the printed circuit board material (5) on which the circuit pattern (4) has been formed is placed in a large press device (not shown) by inserting its reference holes (2) and (3) into the reference pins, and then positioning it. Thereafter, the desired printed circuit board is manufactured by press punching into the desired contour shape.

FIG. 6 shows another example, in which a resist pattern corresponding to the circuit pattern is formed on the copper-clad board (1), and a pair of target patterns are formed as targets for the positions where the reference pin holes are to be formed. After forming a corresponding resist pattern, the copper layer is selectively etched using the resist pattern as a mask to form the target pattern (6) (7) along with the circuit pattern (4).
) to form the target pattern (Figure 6A), then each target pattern (6
) Form the reference pin holes (2) and (3) in the center of (7) (Fig. 6B). Next, this printed circuit board material (5) is positioned in a press device through the reference pin holes (2) and (3), and press punched to produce a printed circuit board.

[Problem that the invention seeks to solve]

By the way, when screen printing the above-mentioned resist pattern, as shown in FIG. 7, the printing screen (8) is placed opposite the substrate (1), and the resist pattern is printed by moving the squeegee (9). ing. At this time, the resist pattern is elongated due to elongation of the screen (8), and this amount of elongation remains as the amount of deviation of the circuit pattern.

Therefore, in the former example described above, when the printed circuit board material (5) is then positioned in a press machine through the reference pin holes (2) and (3) and press punched, pattern deviations such as the circuit pattern being lopsided will occur. In addition, in the latter example, reference pin holes (
2) When (3) is formed, the reference pin hole (2)
When the position of (3) is misaligned and the printed circuit board material (5) is placed on the press machine, the reference pin hole (2) is inserted into the reference pin on the machine side.
(3) will not be inserted.

In recent years, circuit patterns on printed circuit boards have become finer due to the demand for high-density packaging, and high-precision circuit boards are required.

In view of the above-mentioned points, the present invention provides a numerically controlled drilling device that can form a pair of reference pin holes or the like at a specified interval by distributing pattern errors throughout the hole.

[Means for solving problems]

The numerically controlled drilling device of the present invention includes means for detecting the coordinates of each target pattern of a substrate (13) on which a pair of target patterns (33) (34) are formed, and a midpoint (0) of the detected coordinates. means for finding positions (Ql) and (Q2) corresponding to 1/2 of the specified interval value β on a line connecting the detection pattern pair (33) and (34) with the midpoint (0) as a reference; position [(Ql) (Q2) by drilling means (1
8) and means for drilling the hole.

[Effect]

The midpoint (0) between each center coordinate (X, )(L) of a pair of target patterns is found, and the center coordinate (X
17 of the specified interval value (2) on the line connecting I) and (X2)
The position @ (Ql) (Q2) corresponding to 2 is determined, and a hole is drilled at this position W (Q,) (Q2). This hole (3g) (39) will be the reference hole in the next step.

Therefore, if the pair of target patterns (33) (34) are not misaligned, the reference holes (38) (39) are formed at the center coordinate points of the respective target patterns (33) (34), and If the target pattern (33) (34) is misaligned (e.g., the interval is extended), the reference holes (38) (39) are placed at positions where the pattern misalignment error amount is divided into 172 increments (Ql>(Q2)). Moreover, the distance between the two reference holes (38) (39) is maintained at exactly the specified distance β.Therefore, in the next process, the reference holes (38) (39) When the substrate (13) is press punched based on the above, highly accurate processing can be achieved.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a numerically controlled drilling device according to the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram of a numerically controlled punch press device for forming press reference pin holes in printed circuit board material.

In the figure, (11) indicates a punch press section, and (12) indicates a moving section that moves the printed circuit board material (13) to a desired position. The punch press part (11) is attached to the upper frame (14)
and a lower frame (15), and an upper frame (14).
The punch section (18) is operated by the drive section (16) attached to the upper frame (16) in response to commands from the punch press numerical control section (17).
4) is an arm that guides the punch portion (18) when it moves up and down. A die (22) is attached to the lower frame (15) via a fixed head (20) and a die fixing press (21). The moving unit (12) has a so-called X-Y table unit (25) consisting of an X table (23) that is movable in the horizontal direction (X direction) and a Y table (24) that is movable in the vertical direction (Y direction). The printed circuit board material (13) is held on the X table (23) via clamps (26) and (27). Based on this command, the punch press numerical control section (17) operates the X-Y table 1m (25) to move the printed circuit board material (13) to the required position, and operates the drive section (16) to move the punch section. (18) and the die (22) cooperate to form a reference bottle hole in the printed circuit board material (13). on the other hand,
For example, C for detecting a target pattern of a printed circuit board material It (13), which will be described later, so as to line up with the punch part (18).
A CD camera (28) is arranged, and this camera (28) is connected to an image processing unit (29) which determines the center position of the target pattern based on the image (contrast) dike from this camera (28). ) is connected to a punch press numerical control section (17) equipped with arithmetic functions that will become clear later. In addition, the X-Y table part (25
) A rotary encoder, Magnescale, etc. are used to capture the coordinate values when operating.

In this example, first, as shown in FIG. 2A, a copper-clad board (31) for making a printed circuit board is prepared, and a resist pattern corresponding to the circuit pattern and reference pins are formed by screen printing on the copper layer. After forming a resist pattern corresponding to the target pattern at the position where the hole is to be formed, the copper layer is selectively etched using this resist pattern as a mask to form the target along with the circuit pattern (32) as shown in Figure 2. Patterns (33) (34) are formed. These target patterns (33) and (34) are arranged in pairs (two pieces) for one set of circuit patterns (32), and the fourth
(See Figure C) If there are two circuit patterns on one board, that is, two sides, there will be a total of 2 pairs (4 pieces) of target patterns (Figure 4C).
If there are three sets of circuit patterns on one board, that is, three sides, a total of three pairs (six pieces) of target patterns (see Fig. 4C) are required.This circuit pattern pattern 32) and Target pattern for machining standard bottle holes (33) (34
) is held in the clamps (26) and (27) of the punch press device (30) of FIG. The approximate coordinates of the target patterns (33) (34) and the specified interval value β between the pair of reference pin holes are inputted in advance to the punch press numerical control unit (17).

Then, by operating the X-Y table section (25), the printed circuit board material (
13), the camera (28) detects one target pattern (33), and the image processing unit (29) calculates the coordinates (Xl) of the center position of the target pattern (33).
is detected and stored in memory (see Figure 3). Next, the X-Y table section (25) is operated to similarly move the printed circuit board material (13) to a position where the other target pattern (34) is within the field of view of the camera (28).
) is detected by the camera (28), and the image processing unit (29
), the coordinates (X2) of the center position of the target pattern (34)
) is detected and stored in memory. Then, in the calculation unit of the control unit (17), two points (X
I) Calculate the midpoint coordinates (0) between (L).

Then, on the line (36) connecting the centers of both target patterns (33) and (34), position coordinates (Q I) and (Q
7) Calculate. That is, position coordinates (Q, ) (Ql) are calculated by centering 1/2 of the error between the distance between the two points (X, ) (X2) and the specified interval value β. These respective position coordinates (Ql) (Ql) become the positions at which the reference bottle holes are to be machined. Then, the X-Y table section (25) is operated according to a command from the control section (17) based on the coordinate values (Ql) to be processed (Ql) obtained in this way, and the printed circuit board material (13) is processed. coordinate point (Ql) (Ql
) below the punch section (18), and
) and die (22) work together to drill the hole and make the reference bottle hole (3
8) Form (39) (Fig. 2C).

Thereafter, the printed circuit board material (13) with the reference pin holes (38) and (39) formed in this way is placed in a large press device, and the reference pin holes (38) and (39) are engaged with the reference pins on the device side. After positioning the printed circuit board material (13), press punching of the contour shape is performed to obtain the desired printed circuit board.

According to such a configuration, even if a pattern shift occurs when a resist pattern is formed by screen printing, the pattern shift error is evenly distributed from the center of the pattern to the periphery. In other words, the error can be reduced to 1/2 by adding one page to Figure 4, the error can be reduced to 1/4 by adding 2 pages to Figure 4B, and the error can be reduced to 1/4 by attaching 2 pages to Figure 4C. If there are three pages, the error can be reduced to 176. Therefore, a highly accurate printed circuit board can be manufactured in the subsequent press punching process.

Although a punch portion is used in the upper case, the present invention may also be applied to a drilling device that uses a drill instead of the punch portion.

〔Effect of the invention〕

According to the present invention, on a line connecting the centers of both target patterns, find the midpoint between them, find a position corresponding to the specified interval value of 172 based on this midpoint, and drill a hole at that position. Even if a deviation occurs in the required patterns including the target pattern formed on the substrate, a pair of reference holes having a specified interval value can be formed with the error evenly distributed.

Therefore, for example, when the substrate is subsequently positioned using a reference hole and press punched, highly accurate processing can be achieved. Therefore, the numerically controlled hole punching apparatus of the present invention is particularly suitable for forming reference pin holes in the production of finely patterned printed circuit boards for high-density packaging.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an example of a numerically controlled drilling device according to the present invention, Fig. 2 A-C is a process diagram of drilling a reference pin hole in a printed circuit board material using the inventive device, and Fig. 3 is a diagram showing the process of drilling a reference pin hole in a printed circuit board material using the device according to the present invention. 4A to 4C are plan views showing examples of printed circuit board materials applied to the present invention, and FIGS. 5A and 5B are diagrams showing an example of the conventional process of forming reference pin holes. 6A and 6B are process diagrams showing an example of conventional reference pin hole formation, and FIG. 7 is a configuration diagram showing an example of screen printing of a resist pattern in manufacturing a printed circuit board. (11) is the punch press part, (12) is the moving part, (13)
) is the printed circuit board material, (1B) is the punch part, (22)
is Gui, (25) HaX-Yf-pull part, (28) It
Force y' la, (33) (34) are the target pattern, (3
g) This is the reference pin hole in (39). Agent Moka Ito
Hide Matsukuma Example of rotten wood, n +1
Bottom map Figure 1 1 main star map of Sasa A row Figure 2 Figure 3

Claims (1)

[Scope of Claims] Means for detecting the coordinates of each target pattern on a substrate on which a pair of target patterns is formed, means for determining the midpoint of the detected coordinates, and using the midpoint as a reference on a line connecting the pair of detected patterns. A numerically controlled drilling device comprising means for respectively determining positions corresponding to 1/2 of the specified interval value, and means for moving the above-mentioned positions to the position of the drilling means and drilling the holes.