JPH01133391A - Confirming method for v-cutting of printed substrate - Google Patents

Abstract

PURPOSE:To inspect the presence or absence of a V-cut working and the displacement of the V-cut groove by forming a plurality of detecting patterns bridging over the V-cutting line to be cut of a printed substrate and a briding pattern for bridging the plurality of patterns, and V-cutting on the bridging pattern. CONSTITUTION:First and second detecting patterns 3, 4 bridging over the V- cutting line 2 to be cut of a printed substrate 1 and a bridging pattern 5 for briding the first and second patterns 3, 4 on the line 2 are formed. Then, it is V-cut on the pattern 5 along the line 2. In this case, when the V-cutting groove 6L is formed within the width W of the pattern 5, both between A and B, and between C and D are not conducted. Thus, the V-cutting work can be confirmed. Since both between the A and C and between the B and D are conducted, no displacement of the V-cutting grooves can be confirmed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for confirming V-cut processing of a printed circuit board used in the assembly of electronic equipment.

[Prior Art] Printed circuit boards used for assembling various electronic devices are divided into multiple circuit boards by forming multiple independent circuit patterns on one board and performing V-cut processing in the middle of the process. What is done is done. In this case, a method is used to confirm whether the V-cut process has been performed or to confirm whether the V-cut position is defective by visually inspecting or conducting a continuity check.

A conventional confirmation method using such a continuity check is disclosed in, for example, Japanese Patent Application Laid-Open No. 60-130884 or Japanese Patent Application Laid-Open No. 61-9.
As shown in the 1992 publication, a detection pattern is formed so as to span a plurality of circuits to be divided, and after V-cutting is performed on this detection pattern, the presence or absence of continuity at both ends of the detection pattern is inspected. method is known.

[Problems to be Solved by the Invention] However, in the conventional confirmation method, there is a problem in that although it is possible to check the presence or absence of V-cut processing, it is not possible to check the deviation of the V-cut processing groove.

The present invention has been made in response to the above-mentioned problems.
(2) It is an object of the present invention to provide a method for checking the V-cut processing of a printed circuit board, which can inspect the presence or absence of the cut processing and the deviation of the V-cut processing groove.

[Means for solving the problems] In order to achieve the above object, the present invention provides
The present invention is characterized in that a plurality of detection patterns extending over the cut line and a bridging pattern bridging the plurality of detection patterns are formed, and a V-cut process is performed on the bridging pattern.

[Operation] V-cut processing is performed on a bridging pattern formed to bridge a plurality of detection patterns. (2) By inspecting the presence or absence of conduction between a plurality of detection patterns after cutting, it is possible to (2) inspect the presence or absence of cutting and the deviation of the V-cut groove.

[Example] The method for confirming V-cut processing of a printed circuit board according to the present invention will be described below with reference to the drawings.

First, prepare a printed circuit board 1 as shown in Figure 1.

■A first detection pattern 3 that straddles the cut planned line 2;
A second detection pattern 4 and a bridging pattern 5 that bridges these first and second detection patterns 3 and 4 on the V cut planned line 2 are formed. V-cut processing is performed on the bridging pattern 5 along the cut planned line 2. Reference numeral 6 indicates a groove formed by cutting, and FIG. 2(b) is a cross-sectional view of the printed circuit board 1 after V-cutting.

The width of the bridging pattern 5 is W, and the width of the cut groove 6 is
The tolerance of processing accuracy is d (generally ±0.1 for printed circuit boards)
mm to ±0.2 mm), by setting W = L + d, the first detection pattern 3 (both terminals A and B
) and the second detection pattern 4 (both terminals are C and D) are inspected as follows for the presence or absence of continuity. ■ Inspect the presence or absence of cutting and the misalignment of the V-cut groove. Can be done.

First, when the V-cut groove 6L is formed within the width W of the bridging pattern 5 as shown in Fig. 3, there is no conduction between A-8 and C-0, so the It can be confirmed that this is done. Also, since both A-0 and B-0 are electrically connected, it can be confirmed that there is no misalignment of the cut groove.

Next, when the V-cut groove 6 is formed so that a portion protrudes from the left (or right) end of the bridging pattern 5 as shown in Fig. 4, both A-8 and C-0 are electrically conductive. Since it is not cut, it can be confirmed that V-cut processing has been applied. However, since there is no conduction between A and 0, but there is conduction between B and 0, it is confirmed that there is a deviation in the V-cut groove.

Further, when conduction occurs between A-8, B-0, C-0, and A-0, it is confirmed that V-cut processing is not performed.

FIG. 5 shows a second embodiment of the present invention, in which only a predetermined portion in the middle of the bridging pattern 5 between the first and second detection patterns 3 and 4 is set to the value of W=L+d. This shows that. According to this example, the first and second detection patterns 3
, 4 can be provided with a large area, which has the advantage that causes of defects such as pattern breakage at other than predetermined locations can be eliminated.

FIG. 6 shows a third embodiment of the present invention, in which sacrificial boards 1a and 1b are provided adjacent to the printed circuit board 1.

This example shows an example in which the present invention is applied between, for example, 1a and lb when 1c is formed.This example has the advantage that confirmation can be made without reducing the space of the used portion of the board.

FIG. 7 shows a fourth embodiment of the present invention, and shows an example in which the present invention is applied when sacrificial boards 1d to 1h are formed on the end face of the printed circuit board 1 facing la and lb. . According to this example, it is possible to check the deviation of the V-cut groove with even higher accuracy, and since the dimensions are checked between the end faces of the printed circuit board, the span of the measurement position is increased, and the width W of the bridging pattern is Even if it is made a little wider, it is possible to provide some dimensional leeway because (1) the deviation of the cut groove can be easily detected.

FIGS. 8(a) and 8(b) show a fifth embodiment of the present invention, in which the width Q of the bridging pattern 5 is set to the minimum V-cut width during processing. According to this example, especially when the depth of the V-cut groove 6 is small, the edge surface may be damaged when the board is divided, or the mounted chip components may be shocked and cracked, so this defect cannot occur. Without,
Assuming that the thickness of the printed circuit board 1 is 1.6 mm and the minimum required V-cut width is 0.71 W11 as the dimension at which the bridging pattern is divided during processing, the Q is set to 0.7 am or less. By checking the above division, the V-cut width and depth can be detected. This can be confirmed by the fact that neither A-C nor B-0 are electrically connected.

[Effects of the Invention] As described above, according to the present invention, it is possible to inspect (1) the presence or absence of cut processing and the deviation of the V-cut groove.

[Brief explanation of the drawing]

Figures 1, 2(a), 3, 4 and 2(b)
) are a plan view and a sectional view showing an embodiment of the method for confirming V-cut processing of a printed circuit board according to the present invention, and FIG.
FIG. 6 is a perspective view showing the third embodiment of the present invention, FIG. 7 is a perspective view showing the fourth embodiment of the present invention, and FIGS. 8(a) and ( b) is a plan view and a sectional view showing a fifth embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Printed circuit board, 3... First detection pattern, 4... Second detection pattern, 5... Bridging pattern, 6... V-cut processing groove. Patent applicant: Alps Electric Co., Ltd. No. 1■
Mu 2 Figure 8

Claims (1)

[Claims] A V of a printed circuit board characterized by forming a plurality of detection patterns extending over a V cut planned line of a printed circuit board and a bridging pattern bridging these plurality of detection patterns, and performing V cut processing on this bridging pattern. How to check the cutting process.