JPH02180088A - Printed board and confirming method for v-cut groove thereof - Google Patents

Abstract

PURPOSE:To simultaneously discriminate the presence or absence of formation of a V-cut groove and deviation of its forming position by aligning two copper foil patterns crossing a boundary line at a V-cut groove forming position, and forming a third copper foil pattern for bridging and connecting the copper foil patterns on the boundary line substantially in the same width as the V-cut groove. CONSTITUTION:Two copper foil patterns 14, 15 crossing the boundary lines L1, L2 of adjacent split boards are aligned at the V-cut groove forming position of a printed board 10, and the copper foils are exposed at both ends of the copper foil patterns 14, 15 to form electrodes 14A, 14B, 15A, 15B made of the lands of the patterns. Simultaneously, a third copper foil pattern 15 for connecting the two copper foil patterns 14, 15 at the positions of the boundary lines L1, L2 in a bridging state is formed substantially in the same width as that of the V-out groove 17. The presence or absence of the conduction between the electrodes 14A, 14B, 15A, 15B is measured and inspected. Thus, not only the presence or absence of the V-cut groove 17 formed between the split boards but the groove forming state on the boundary lines L1, L2 can be effectively and easily confirmed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an improved structure of a pattern for checking V-cut grooves for dividing a printed circuit board having a plurality of circuit boards to be divided, and a method for checking the V-cut grooves. be.

Conventional technology In general, when manufacturing printed circuit boards, consideration is given to handling in each manufacturing process, the area occupied by various equipment, operating efficiency, etc., and further consideration is given to the efficiency of automatic insertion of circuit components or the convenience of management. For this reason, two or more circuit boards are assembled on a large substrate as a base material so as to be divisible, and after mounting the components, the individual circuit boards are divided and used. Therefore, V-shaped cut grooves called V-cut grooves are machined on the boundaries between adjacent circuit boards and on the boundaries between circuit boards and surrounding sacrificial boards, and the circuit boards are cut in the V-cut grooves. A cutting and dividing method is used.

Confirmation of whether or not such V-cut grooves have been processed has conventionally been carried out by visual inspection. As a result, there has been a problem in that items without cut grooves are often overlooked. If you overlook the fact that there is no V-groove processing as it should be, it goes without saying that you will not be able to divide the circuit board. , (2) It is necessary to perform the cutting process again on the relevant part, and at that time, problems such as damage to the mounted components and damage to the circuit board occur. Therefore, at present, printed circuit boards are provided with means for confirming the presence or absence of V-cut grooves as shown in FIGS. 5(a) and 5(b).

In FIG. 5(A), reference numeral 1 denotes a base material substrate, and circuit boards 2.3 to be divided are formed adjacent to each other so that they can be cut out. A sacrificial substrate 4 is formed around it.

V-cut grooves are formed on the boundary line Ll of the circuit board 2.3 and on the boundary line L2 between the circuit board 2.3 and the sacrificial board 4 . A copper foil pattern 5 is formed at the V-cut groove forming position of the two circuit boards 2.3 so as to extend across the boundary lines Ll and L2 in a bridge-like manner from one circuit board to the other circuit board or a sacrificial board. Both ends of pattern 5, i.e.
Electrodes 2as3a are formed at one end on the circuit board 2 side and the other end on the circuit board 3 side, each consisting of a land pattern in which copper foil is exposed by removing the resist film. Electrode 2a13
Terminal insertion holes 2b and 3b are formed in the center of a, passing through the front and back sides of the board, respectively. Furthermore, an electrode 4a having an insertion hole 4b is formed at the end of the pattern 5 extending from the circuit board into the sacrificial board 4.

■After cutting grooves are processed, in order to check whether or not they have been processed, connect the contacts of the measuring instrument to each electrode 2 of the substrate 2.3.
aN 3 a and check for continuity between them. In this inspection process, if the V-cut groove 6 is machined on the boundary line L1 or L2 as shown in FIG. 5(b), the electrode 2a
13a is open, that is, there is no conduction, and it is confirmed that the cut groove has been processed.

On the other hand, if the V-cut groove is not formed on the boundary line L1 or L2 as shown in FIG. 5(c), the electrode 2a%
3 A becomes conductive, and it is confirmed that the cut groove has not been processed. In this way, it is determined and confirmed whether or not the V-cut groove has been processed.

Problems to be Solved by the Invention Although the above-mentioned conventional method for checking the presence or absence of groove machining can determine whether or not groove machining has been performed, it is difficult to determine whether or not the groove has been machined correctly at the regular position on the boundary line. It was not possible to determine that. For example, even if the grooves are deviated from the boundary line toward one of the electrodes, the space between the electrodes becomes an oven, so it will be confirmed that the grooves have been formed. Therefore, with the conventional method, it is impossible to check whether the positional deviation of the groove machining is within the allowable range or not.

The purpose of this invention is to be able to reliably and easily confirm not only whether or not the ~r-cut grooves formed between divided substrates have been processed, but also whether the grooves have been processed correctly on the boundary line without positional deviation. It's about doing.

Means for Solving the Problems The present invention provides two copper foil patterns that are arranged in parallel across the boundaries of divided boards adjacent to the V-cut groove forming position of a printed circuit board, and that copper foils are placed at both ends of each copper foil pattern. is exposed to form an electrode consisting of a land of the pattern, and a third copper foil pattern is formed with approximately the same width as the cut groove to connect the two copper foil patterns in a bridging manner at the position of the boundary line. The gist is that.

According to the second feature of the present invention, the width of the third copper foil pattern is set to a size that includes (1) an allowable difference in the amount of positional deviation with respect to the boundary line of the cut groove; The two copper foil patterns and the third copper foil pattern form a substantially H-shaped V-groove machining confirmation pattern.

Furthermore, the present invention is characterized by a printed circuit board having the following configuration.

The two copper foil patterns extending from adjacent electrodes are extended in a substantially X shape in the direction of the diagonally located electrodes across the boundary line, and are connected by a third copper foil pattern on the boundary line. i Furthermore, the present invention is characterized in that at least three electrodes are arranged in parallel by exposing a land of a copper foil pattern on one side of the circuit board sandwiching the boundary line, and each has a central electrode and an electrode on one side thereof. Two copper foil patterns are extended across the boundary line to the other circuit board, and their ends are connected by a third pattern parallel to and close to the boundary line, and connected to the center electrode. On the other hand, a fourth copper foil pattern is extended from the electrode on one side and the electrode on the opposite side in the direction of the boundary line, and the extended end is moved toward the pattern having the central electrode at a position close to the boundary line. A pattern extending along the line and connected to the pattern, such that the portions of the third pattern and the fourth pattern along the boundary line are positioned substantially parallel to and close to the boundary line, sandwiching the boundary line. The main subject is a printed circuit board formed by forming a shape.

Further, the gist of the present invention is a groove machining confirmation method having the following configuration.

That is, in the present invention, contactors for continuity testing are brought into contact with electrodes provided at both ends of two copper foil patterns, and between adjacent electrodes in each phase on one side and the other side sandwiching the boundary line; This V-cut groove confirmation method is characterized by detecting the presence or absence of conduction between electrodes at both ends of a pattern.

In this confirmation method, the method of the present invention also includes detecting the presence or absence of positional deviation with respect to the boundary line of the V-cut groove according to the presence or absence of conduction between adjacent electrodes of each phase on one side and the other side via the boundary line. Included as a feature of

Furthermore, the gist of the present invention is a V-cut groove confirmation method having the following configuration.

That is, in the present invention, a contact for continuity testing is brought into contact with a central electrode formed on a circuit board on one side with respect to the boundary line, and an electrode on one side and an electrode on the other side on both sides of the central electrode, and It is characterized by a V-cut groove confirmation method that detects the presence or absence of conduction between the electrode on one side and the electrode on the other side, and between the electrode on the center side and the electrode on the other side. In this case, by detecting the presence or absence of conduction between the center electrode and one side electrode, and between the center electrode and the other side electrode, it is determined whether there is a positional deviation with respect to the boundary line of the machined V-cut groove. This is also included as a feature of the method of the present invention.

Function: To check the presence or absence of V-cut grooves, contact the contactors for continuity testing to the adjacent electrodes at both ends of the two copper foil patterns, and then The presence or absence of continuity between adjacent electrodes and between the electrodes at both ends of the two copper foil patterns is measured and inspected.

If there is continuity between the electrodes at both ends of the two copper foil patterns, it is determined that the cut groove is not processed. on the other hand,
When the electrodes at both ends of the pattern are open, that is, there is no conduction, it is determined that (1) a cut groove has been processed.

Furthermore, if one of the adjacent electrodes on one side and the other side of the dividing boundary line of two copper foil patterns is open and the other is conductive, It is determined that the machining is performed with the position shifted to the side of the electrode that is open to the other side. On the other hand, when the adjacent electrodes on one side and the other side are open, or both are open, V
It is determined that the cut groove exactly matches the boundary line or is machined at the correct position within the allowable tolerance range.

On the other hand, in one configuration of the present invention, if a central electrode and three electrodes on one side and the other side on both sides of the central electrode are arranged in parallel on one side of the circuit board sandwiching the boundary line, each electrode When applying a contact and checking whether there is continuity between the center and one side and between the center and the other side, if there is no continuity between the center electrode and each electrode on one side and the other side, ■ Cut grooves have been machined. It is determined that the In the opposite case, it is determined that there is no groove processing.

If there is no conduction between the center and the electrodes on one side and between the center and the other electrodes, the bent portions of the third pattern and the fourth pattern are both cut and removed by the V-cut groove,
In the state with groove machining, (1) it is determined that the cut groove is correctly aligned with the boundary line. Furthermore, if there is no conduction between the center and one side electrodes and there is conduction between the center and the other side electrodes, or vice versa, the cut groove is in the state with groove processing, and ■ the cut groove is against the boundary line. It is determined that the position has shifted in the direction of the circuit board on one side or the other side.

As described above, (1) confirming whether the cut groove has been processed and confirming whether there is any positional deviation with respect to the boundary line can be simultaneously performed using the same confirmation pattern.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 is a partial plan view of a printed circuit board according to the present invention, and FIG. 2 shows its main parts.

A plurality of (two in the illustrated example) circuit boards 1 are mounted on the board base material 10.
1.12 are formed adjacent to each other along the boundary line Ll so as to be divisible. A waste board 13 is placed around the circuit board LL12.
is formed so that it can be cut and removed via the boundary line L2.

Between the circuit boards 11 and 12 and between the circuit board LL12 and the disposable board 13, two pairs of copper foil patterns 14 and 15 are formed in parallel, crossing the boundary lines L1 and L2, respectively. This pair of copper foil patterns 14 and 15 are actually provided at multiple locations on the dividing line of the board, but
In the illustrated example, only two of these locations are shown.

Electrodes 14A, 115A and 14B, 115B are formed of lands of patterns in which the resist film is removed from both ends of two copper foil patterns 14 and 15, that is, one end on the circuit board 11 side and the other end on the circuit board 12 side, to expose the copper foil. are formed in pairs next to each other. Terminal insertion holes 14G, 15C are provided at the center of each of the electrodes 14A, 115A, 14B, and 15B.
1 and 14D115D are formed penetrating the front and back sides, respectively.

The two copper foil patterns 14 and 15 are connected in a bridge-like manner by a third copper foil pattern 16 at the boundary line Ll or L2. The third copper foil pattern 16 is arranged so that its center line in the width direction coincides with the boundary line Ll (L2), and its width is equal to or wider than the width of the V-cut groove to be processed. It is also formed slightly larger. This third pattern 1
The width of 6 may be set to a size that includes the allowable tolerance of the amount of positional deviation with respect to the boundary line Ll or L2 of the cut groove,
It has the same effect. The size including the allowable tolerance refers to the size obtained by increasing or decreasing the width of the cut groove by the allowable tolerance.

Two copper foil patterns 14 and 15 and electrodes 14 on both ends thereof
A substantially H-shaped groove machining confirmation pattern is formed by A115A, 14B, 15B, and the third copper foil pattern 16.

Next, a procedure and method for checking the presence or absence of V-cut groove machining according to the present invention using the groove machining confirmation pattern having the above-mentioned configuration will be described.

■When inspecting the presence or absence of machining of the cut grooves and the presence or absence of positional deviation, first, a contactor for continuity testing, such as a current testing machine 2
The contact pin 21@- of No. 0 is pressed against each electrode 14A114B and 15A115B of the groove machining confirmation pattern. Next, each electrode 14A of the two patterns 14.15
Between 114B and 15A115B, and the boundary line Ll (L2
), a current conduction test is performed between the adjacent electrodes 14A and 15A on one side and between the adjacent electrodes 14B and 115B on the other side.

First, as shown in FIG. 3, if a V-cut groove is not formed on the boundary line LL (L2) for some reason, the electrodes 14A114 of each of the two patterns 14.15.
Between B and between 15A1158 and adjacent electrodes 14
There is continuity between both A115A and 14B115B, and the V-cut groove is located at the boundary line Ll (L
2) It is determined that there is no processing on the top.

Next, as shown in Fig. 4 (a), V is placed on the boundary line Ll (L2)
The cut groove 17 is machined, and the third
When the copper foil pattern 16 is removed, the electrodes 14A and 14B and between the electrodes 15A and 15B at both ends of the two patterns 14 and 15 become open, that is, they become non-conductive, and the boundary line Ll (L2 ) It is determined and confirmed that the V-cut groove 17 has been processed on the top. In this case, between the adjacent electrodes 14A, 115A and 14B, 15B on one side and the other side with respect to the boundary line Ll (L2),
If both are open, it is determined that (1) the center line of the cut groove 17 is correctly aligned with the boundary line Ll (L2), or it is determined that the cut groove 17 has been machined in the correct position within the allowable tolerance range.

On the other hand, between the electrodes on either side, for example, electrode 14A11
5B is open, and adjacent electrodes 14B115 on the other side
If there is continuity between B and B, the V-cut groove 17 is not machined at the correct position on the boundary line, and one side of the electrode is open to the boundary line, as shown in Figure 4 (B). 14
It is determined that the position has shifted to the A115A side beyond the allowable range. In this case, the third copper foil pattern 16 is
Due to the positional deviation of the cut groove 17, it is not completely removed and a part or the whole remains as it is, and the other electrode 14B115 is removed through this third pattern 16.
B will be electrically connected.

Therefore, even if it is determined that one electrode 14A115A is open and the V-cut groove 17 is machined, the conduction between the other adjacent electrodes 14B115B will cause the cut groove 17 to be placed in the correct position. It is determined that the image is not processed and is shifted to one side from the boundary line. Furthermore, the direction of the positional shift can be easily determined at the same time by seeing which electrode gap is open.

Next, FIGS. 6 and 7 show the V of the printed circuit board according to the present invention.
Another example of the cut groove confirmation pattern is shown.

In FIG. 6, the same parts as in FIGS. 1 to 4 showing the first embodiment are designated by the same reference numerals, and their explanation will be omitted. In this FIG. 6, each circuit board 11.12 on one side and the other side
Each adjacent electrode 14A, 114B and 15A, 15B
The two patterns 14 and 15, each having a pattern 14 and 15 at both ends, cross the boundary line, face toward the electrodes located at diagonal positions on the mating circuit board 11 or 12, and are bent toward the center in a substantially dogleg shape. . The two copper foil patterns 14 and 15 are connected on the boundary line Ll (L2) by a third copper foil pattern 16' between the substantially doglegged centers. The width of this third copper foil pattern 16° is the V-cut groove 1 to be processed.
It is formed to have the same width as No. 7 or a little wider than No. 7. The center line of the third pattern 16' coincides with the boundary line Ll (L2). The width of this third pattern 16゛ is, as above,
(2) The size may be set to include an allowable tolerance for positional deviation with respect to the boundary line Ll (L2) of the cut groove. Even with the structure of the embodiment shown in FIG. 6, the same effect of V-cut groove confirmation as described above can be obtained.

Furthermore, FIG. 7 shows a third embodiment of the V-cut groove confirmation pattern according to the present invention, and the same parts as in the above embodiments are denoted by the same reference numerals, and the explanation thereof will be omitted.

In FIG. 7, three electrodes 24A, 25A, and 126A are arranged in parallel in a direction parallel to the boundary line near the boundary line Ll (L2) of the circuit board 11 or 12 on one side, the substrate 11 in the illustrated example. . Terminal insertion holes 24B and 25 are provided at the center of each.
B, 26B are formed through.

Copper foil patterns 24.25 are extended in parallel from the center electrode 25A and the electrode 24A on one side, and the boundary line Ll (L2
) to the other circuit board 12. The ends close to the boundary line Ll (L2) are connected by a third copper foil pattern 27. Third copper foil pattern 2
7 does not contact the boundary line L1 (L2), but runs parallel to it at a position close to it. The two copper foil patterns 24 and 25 and the third copper foil pattern 27 form a substantially U-shaped pattern shape.

Furthermore, the electrode 26A on the other side with respect to the center electrode 25A
From the fourth copper foil pattern 2 in the direction of the boundary line Ll (L2)
8 is extended. The end thereof is bent into a hook shape in the direction of the copper foil pattern 25 having the central electrode 25A at a position close to the boundary line L1 (L2), and is connected to the copper foil pattern 25. The bent portion 28A of the fourth pattern 28 is formed in a position parallel to and close to the boundary line Ll (L2). And the third pattern 27
and the bent portion 28A of the fourth pattern 28 are defined by the boundary line Ll.
They have a parallel relationship with (L2) in between. Further, the width between the outer edge of the third pattern 27 and the outer edge of the bent portion 28A of the fourth pattern is slightly narrower than the width of the cut groove 17; When the line is processed correctly, both sides are cut and removed.

In the pattern shape of FIG. 7, the contactor 21 is brought into contact with each electrode 24A125A128A, and the center electrode 2
When examining the presence or absence of continuity between the electrode 5A and the electrode 24A on one side, and between the center electrode 25A and the electrode 2eA on the other side, the following results are obtained.

■If the cut groove 17 is processed correctly without any positional deviation on the boundary line Ll (L2), the bent portions 28A of the third pattern 27 and the fourth pattern 28 are cut and removed;
Since the patterns 24 and 25 and the patterns 25 and 26 are both open, there are gaps between the center electrode 25A and the electrode 24A on one side, and between the center electrode 25A and the electrode 2eA on the other side.
It is detected that there is no continuity between the two. As a result, it is determined that the cut groove 17 is correctly machined on the boundary line.

On the other hand, if the V-cut groove 17 is processed to be shifted toward one of the circuit boards 11 or 12 with respect to the boundary line Ll (L2)I, the electrode 24A1 will pass through the pattern 27 or 28.
It is detected that there is conduction between the electrodes 25A or between the electrodes 25A and 12eA, and that there is no conduction between the other electrodes. This confirms that the V-cut groove 17 has been machined, and at the same time confirms that it has been machined in the correct position.If the V-cut groove 17 has been machined in the correct position, it can be confirmed that the V-cut groove 17 has been machined in the correct position. It is determined that

Further, (2) When the cut groove 17 is not processed at all, conduction is detected between the electrodes 24A and 125A and between the electrodes 25A and 126A. As a result, it is determined that the groove is a V-cut groove or not processed due to some factor.

From the above, even with the pattern shape shown in FIG.
As in the first and second embodiments described above, (1) it is possible to accurately determine and confirm whether or not the cut groove has been processed and whether or not the processing has been performed correctly on the boundary line without visual inspection;

The disconnection detection device used for the continuity test is the electrical continuity tester 20.
It is not only possible to use only one instrument, but also various instruments. Of course, a simple type such as a tester can also be used.

As described in detail, according to the present invention, it is possible to simultaneously and reliably and easily determine whether or not a V-cut groove formed on the boundary line of a divided substrate has been processed, and whether or not the processed position has shifted. Therefore, problems caused by positional deviation can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a partial plan view of a printed circuit board according to the present invention, and FIG.
The figure is an enlarged plan view showing the main part, Figure 3 is a partially enlarged plan view explaining the procedure and method for checking whether the V-cut groove has been processed, and Figures 4 (a) and (b) are the same as ■ FIGS. 5(a), 5(b), and 5(c) are partially enlarged plan views illustrating a procedure and method for checking whether or not cut grooves have been processed and whether there are positional scratches. FIGS. 5A, 5B, and 5C are partial plan views showing conventional examples. FIGS. 6 and 7 are enlarged plan views of essential parts of other embodiments of the V-cut groove confirmation pattern for printed circuit boards according to the present invention. 10...Printed board, 11.1211...Circuit board, 17...V-cut groove, Ll 1L2 ・41- boundary line, 28・φ・4th copper foil pattern, 28A@working/bending part.

Claims (9)

[Claims] (1) In a printed circuit board in which a plurality of circuit boards or a board main body and a sacrificial board are formed so as to be divisible, and a V-cut groove is machined on the boundary line to be divided, the boundary line is crossed at the position where the V-cut groove is machined. Two copper foil patterns are arranged side by side, the copper foil is exposed at both ends of each copper foil pattern to form an electrode consisting of a land of the pattern, and the two copper foil patterns are bridged on the boundary line. A printed circuit board characterized in that a third copper foil pattern to be connected is formed with substantially the same width as the V-cut groove. (2) In claim (1), the third copper foil pattern is V
A printed circuit board characterized in that the printed circuit board is formed with a width that includes an allowable difference in the amount of positional deviation with respect to the boundary line of the cut groove. (3) The print according to claim (1) or (2), wherein a substantially H-shaped V-groove processing confirmation pattern is formed by two copper foil patterns and a third copper foil pattern connecting them. substrate. (4) The two copper foil patterns extend in a substantially X-shape toward electrodes located diagonally across the boundary line, and are connected by a third copper foil pattern on the boundary line. The printed circuit board according to claim (1) or (2). (5) In a printed circuit board in which a plurality of circuit boards or a board main body and a sacrificial board are formed so as to be divisible, and a V-cut groove is formed on the dividing line, one side of the circuit board sandwiching the boundary line is covered with copper. At least three electrodes are arranged in parallel with the land of the pattern exposed, and two copper foil patterns each having a central electrode and an electrode on one side thereof are extended across the boundary line to the circuit board on the other side. and the ends thereof are connected by a third pattern parallel to and close to the boundary line, and the border is connected from the other side electrode opposite to the one side electrode with respect to the center electrode. extending a fourth copper foil pattern in the direction of the line, and extending an extended end thereof along the boundary line in the direction of the pattern having the central electrode at a position close to the boundary line, and connecting it to the pattern; Said third
A print characterized in that the pattern shape is formed such that the pattern and the bent portion of the fourth pattern along the boundary line are positioned substantially parallel to and close to the boundary line, sandwiching the boundary line. substrate. (6) In the printed circuit board according to claim (1), (2) or (4), contactors for continuity testing are brought into contact with electrodes provided at both ends of each of the two copper foil patterns, and the boundary line is A method for checking a V-cut groove on a printed circuit board, characterized by detecting the presence or absence of conduction between adjacent electrodes on one side and the other side of the sandwich, and between electrodes at both ends of two patterns. (7) In claim (6), presence or absence of positional deviation with respect to the boundary line of the V-cut groove processed according to the presence or absence of conduction between adjacent electrodes of each phase on one side and the other side via the boundary line. A method for confirming a V-cut groove on a printed circuit board, characterized by detecting. (8) In the printed circuit board according to claim (5), a contactor for continuity testing is brought into contact with the central electrode and each electrode on one side and the other side on both sides thereof, and A method for checking a V-cut groove on a printed circuit board, the method comprising detecting the presence or absence of conduction between electrodes and between the center electrode and the other electrode. (9) In claim (8), the positional deviation with respect to the boundary line of the V-cut groove processed according to the presence or absence of conduction between the center electrode and the electrode on one side and between the center electrode and the electrode on the other side. A method for checking a V-cut groove on a printed circuit board, characterized by determining the presence or absence of a V-cut groove.