JPH05145204A - Printed wiring board - Google Patents

Abstract

PURPOSE:To decide the quality of the working accuracy of a V-groove i.e., the division accuracy of a board through visual observation by printing a pattern on the division target line of a board surface. CONSTITUTION:On the surface of a printed wiring board 1, a plurality of check patterns P1, P2 and P3 for visually confirming the accuracy of a V-groove are printed in a line along the target line L of board division. In this case, when a target V-groove width is Wa, there exists the relation of Wa>W1, Wa=W2 and Wa<W3 between respective pattern widths W1, W2 and W3 of the check patterns P1, P2 and P3. When the V-groove can be formed with an accurate width along the division target line in the printed wiring board 1, all checking patterns of P1 and P2 disappear and only both ends of the check pattern P3 with the maximum pattern width are left with an equal width. Thus, when the check pattern is visually confirmed after the V-groove has been cut, it is possible to decide whether the working accuracy of the V-groove is good or not.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed wiring board, and more particularly to a printed wiring board divided into a plurality of substrates by forming a V groove on the surface of the substrate.

[0002]

2. Description of the Related Art Conventionally, when a printed wiring board integrally formed with a plurality of independent circuit patterns is divided into a plurality of boards, a V groove is formed on each surface of the printed wiring board along a division target line, and then, This was cut by slightly bending the entire substrate. At that time, it is general to use a V-groove machine using a circular saw or a cutter as a cutting tool for the V-groove processing on the printed wiring board.

However, the problem here is the division accuracy of the printed wiring board. In other words, although the printed wiring board is positioned with reference to the edges and the like in the V-groove processing, the V-groove processing is not always performed at an accurate position on the board due to variations in the outer shape of the board and the like. Moreover, as the miniaturization of electronic devices is eagerly awaited today and the restrictions on size are becoming more and more severe, the external shape of the printed wiring board,
Since there are variations in size, it often happens that the device cannot be incorporated into the device, which is an extremely alarming point.

Further, since it is extremely inefficient to perform a size check or the like on each of the divided printed wiring boards by using a measure or the like, these checks are often omitted, and an attempt is made to incorporate them into a device. For the first time, the situation was such that the size defect of the printed wiring board was known.

[0005]

As described above, there is a problem that performing size check or the like on each of the divided printed wiring boards is too time-consuming and lacks in practicability.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a printed wiring board capable of easily visually judging the quality of the V-groove processing accuracy, that is, the board division accuracy. There is.

[0007]

In order to achieve the above-mentioned object, a printed wiring board of the present invention is formed by forming a V-groove on the surface of the substrate, and is divided into a plurality of substrates along the V-groove. In the wiring board, a pattern for visually confirming the processing accuracy of the V groove is printed on at least both ends on the division target line on the board surface.

[0008]

According to the present invention, a pattern for confirming the processing accuracy of the V-groove is printed on at least both ends on the division target line on the substrate surface, so that the state of the pattern remaining after the V-groove processing can be visually checked. Only by checking, it is possible to determine whether or not the processing accuracy of the position and width of the V groove, that is, the division accuracy of the printed wiring board.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a state before division of a printed wiring board according to an embodiment of the present invention.

As shown in FIG. 1, on the surface of the printed wiring board 1, a plurality of independent circuit patterns (not shown) are formed, and the position, width, etc. of the V groove formed by the V groove processing machine are shown. A plurality of check patterns P1, P2, P3 for visually confirming the accuracy are printed in a line along the target line L for dividing the substrate.

Here, each check pattern P1, P2,
P3 has three kinds of widths, and each kind of pattern width W1, W2, W3 has a relationship of Wa> W1, Wa = W2, Wa <W3, where Wa is the target V groove width. Has been done.

2 and 3 are a plan view and a sectional view showing a state of the printed wiring board 1 after the V-groove processing.

As shown in these figures, the printed wiring board 1
If the V groove 10 can be formed with a correct width along the division target line L, all the check patterns of P1 and P2 on the printed wiring board 1 are eliminated, and both end portions of the check pattern P3 having the maximum pattern width are removed. Only will remain with a uniform width.

Therefore, by visually confirming the state of the check pattern remaining after the V-groove processing, it is possible to easily determine whether the V-groove processing accuracy, that is, the division accuracy of the printed wiring board 1 is good or bad. It will be possible.

Next, another embodiment of the present invention will be described. Figure 4
FIG. 6 is a plan view showing a state before division of the printed wiring board of this embodiment.

As shown in the figure, the printed wiring board 11 of this embodiment has zigzag check patterns P11 and P12 printed at both ends on the division target line L, respectively. Here, the width W11 of the pattern portion located in the center of each check pattern P11, P12 is equal to the target V groove width Wa.

Therefore, in this printed wiring board 11, the two check patterns P1 remaining after the V-groove processing is performed.
By visually comparing 1 and P12, it is possible to determine whether the machining accuracy of the V groove is good or bad.

Needless to say, the shape of the check pattern may be any other shape as long as the quality of the V-groove processing accuracy can be visually judged from the state of the pattern remaining after the V-groove processing.

For example, in the embodiment shown in FIG. 1, only the check pattern P3 having a width larger than the target V groove width may be printed, and the check pattern P2 having the same width as the target V groove width may be printed together with the check pattern P3. May be printed.

Further, the check pattern shown in FIG. 1 may be printed only on both ends of the printed wiring board 1, or may be printed on both front and back surfaces of the printed wiring board.

[0022]

As described above, according to the printed wiring board of the present invention, by printing the pattern for confirming the V-groove processing accuracy on at least both ends on the division target line on the substrate surface, The quality of the V-groove processing accuracy can be determined only by visually confirming the state of the pattern after the V-groove processing.

[Brief description of drawings]

FIG. 1 is a plan view showing a state before division of a printed wiring board according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state of the printed wiring board shown in FIG. 1 after V-groove processing.

FIG. 3 is a partial cross-sectional view of the printed wiring board after the V-groove processing shown in FIG.

FIG. 4 is a plan view showing a state before division of a printed wiring board according to another embodiment of the present invention.

[Explanation of symbols]

 1, 11 ... Printed wiring board P1, P2, P3, P11, P12 ... Check pattern 10 ... V groove

Claims (1)

[Claims] 1. By forming a V groove on the surface of the substrate,
In a printed wiring board divided into a plurality of substrates along the V groove, a pattern for visually confirming the processing accuracy of the V groove is printed on at least both ends on the division target line on the substrate surface. A printed wiring board characterized by the above.