JPH0621606A - Method of confirming auxiliary processing of external and internal shape of printed wiring board - Google Patents

Abstract

PURPOSE:To confirm the auxiliary processing of the external and internal shape of printed wiring board with a measuring instrument. CONSTITUTION:In case of processing the external shape and internal shapes of a printed wiring board two times or more to at least a single printed wiring board, the conductive pattern 5 made by etching is provided independently, and also at each processing of external and internal auxiliary processing, the circuit parts 3a and 3b of the conductive pattern 5 are cut by mold pins 4a and 4b, and then the existence of conductivity of the conductive pattern 5 is judged, whereby the completion of external and internal shape processing is confirmed.

Description

Detailed Description of the Invention

[0001]

[Industrial application] The present invention relates to a method for confirming the outer shape of a printed wiring board and the construction of inner shape auxiliary processing.

[0002]

2. Description of the Related Art As electronic devices become lighter, thinner, smaller and smaller,
In the present situation, the printed wiring board is used in various fields with high density wiring and a high number of layers, and there is a growing demand for higher precision.

Specifically, as electronic components mounted on a printed wiring board are downsized, and I and C are highly integrated, the number of terminals is increased, so that the space between terminals is narrowed and the terminals are The accuracy of the holes to insert is becoming severe.

As a conventional processing method relating to the outer shape and inner shape processing for finishing such a highly accurate printed wiring board as a single product, generally, an industrial printed wiring board is processed by a router, and a consumer printed wiring board is used. Is processed by a die press.

However, in the present situation where high-density wiring has been advanced to a high degree, even in the case of a consumer printed wiring board, it is necessary to perform the outer shape and the inner shape processing with a die press in a single operation because of the cracks between the component holes. Also, since many serious defects such as chipping of the base material are likely to occur, many products are difficult to process.

Therefore, in order to prevent the cause of defects caused by performing the outer shape and inner shape processing in a single operation, a part of the processing is performed in combination with the router in addition to the die processing, or The reality is that the field of mold processing is distributed and two or more molds are used.

Further, when the distributed processing is carried out in this way, it becomes necessary to confirm whether or not each step of the distributed processing has been carried out with certainty. Then, as a method of confirming the same, visual inspection or electrical means has been conventionally used.

The invention disclosed in Japanese Patent Publication No. 2-56839 is known as an example of a method of confirming this kind of processing. In the invention described in the publication, as shown in FIGS. 5 and 6, two independent wiring circuits 11 and 12 are formed on an integrated substrate 13 and a boundary line extending over the regions of the respective circuits 11 and 12. Independent conductor patterns 15 and 16 are formed in the vicinity of both ends on the boundary line 14 respectively.
When the V-cut processing 14a is applied (FIG. 6), the conductor patterns 15 and 16 are cut and separated by the V-cut processing 14a.

Conductor pattern 15 by the V-cut processing,
Since the 16 is divided, the conductor patterns 15 and 16 are not electrically connected. There has been proposed a method of confirming whether or not a V cut has been performed by determining the presence or absence of continuity with a measuring instrument.

[0010]

However, when the external shape and the internal shape processing of the conventional printed wiring board are distributed and the external shape and the internal shape processing are dispersed, some of the distributed processing becomes an auxiliary element. Therefore, there is a risk that the processing step will not be carried out reliably and will flow to the next step.

Further, in the conventional inspection method for confirming whether or not the dispersed processing steps are surely carried out,
There is a problem that defective products occur because it is easy to overlook the skipped steps.

Therefore, the present invention has been made in view of the above problems, and by carrying out distributed processing of outer shape and inner shape processing on at least a single printed wiring board, it is possible to carry out the following without processing steps. It is an object of the present invention to provide a method for checking whether or not external shape / inner shape auxiliary processing has been performed by checking the flowing product with a measuring instrument even if it flows to the process.

[0013]

In order to achieve the above object, the method of confirming the outer shape and inner shape auxiliary processing of a printed wiring board according to the present invention is:
As a method of confirming the external shape and the internal shape auxiliary processing when the external shape and the internal shape auxiliary processing are applied more than once to at least a single printed wiring board, the processing corresponding to the internal shape and the like By independently providing a conductive pattern for confirmation, by cutting the conductive pattern corresponding to each of the outer shape and the inner shape auxiliary processing at each processing, and then determining whether the conductive pattern is conductive or not. It is characterized by confirming the construction of the outer shape and inner shape auxiliary processing.

[0014]

According to the method for confirming the outer shape and the inner shape auxiliary processing of the printed wiring board of the present invention, the independently provided conductive pattern is cut at each of the outer shape and the inner shape auxiliary processing, and then the conductive pattern is formed. When there is no continuity when the continuity of the pattern is determined by the measuring instrument, it is determined that the outer shape and inner shape auxiliary processing has been performed, and when there is continuity, it is confirmed that the continuity has not been performed.

[0015]

Embodiment 1 FIGS. 1 and 2 show Embodiment 1 of the present invention, and FIG. 1 is a plan view of a conductive pattern. In the present embodiment, the confirmation of the construction when the outer shape and the inner shape auxiliary machining are divided into the primary and secondary machining twice will be described.

As shown in FIG. 1, the two conductive patterns have lands 2 on both ends thereof connected by a circuit 3, and the width of the circuit 3 is smaller than the diameter (0.8 mm) of the mold pins 4a and 4b. Is formed.

Each of the two conductive patterns 1 having the above-mentioned structure is marked as a secondary processing for the primary processing of the outer shape and the inner shape auxiliary processing.

In the production of a printed wiring board, the conductive pattern 1 is applied to the wiring circuit of the printed wiring board in a usual etching process of forming a printed wiring circuit with copper foil on a substrate surface processed into a work size. On the other hand, they are simultaneously formed in two independent places.

Next, after a solder resist and a symbol mark are printed in the subsequent manufacturing process of the printed wiring board, the printed wiring board of the work size is cut into the outer shape and the punching size of the inner working die press (not shown). ).

With respect to the cut printed wiring board,
As shown in FIG. 2, primary processing is performed using only the inner die. Simultaneously with the processing, the conductive pattern 1 for the primary processing
The circuit 3 is punched with the die pin 4a.

Next, as the secondary processing, at the time of processing a part of the outer shape and the inner shape, at the same time, the circuit 3 of the conductive pattern 1 for the secondary processing is punched by the die pin 4b.

After that, the presence or absence of electrical continuity of the conductive pattern 1 at the two locations is checked by a measuring instrument, and if there is no electrical continuity at the two locations, it is considered that the primary and secondary outer shapes and internal shapes have been processed. You can check.

When the conductive pattern 1 is conductive,
It is determined that the processing corresponding to the conductive pattern 1 that has been conducted is unprocessed.

According to the present embodiment, the conductive pattern 1 independently provided at two places is checked for continuity by the measuring instrument after the primary and secondary machining of the outer shape and the inner shape. This makes it possible to confirm the external shape and the internal shape auxiliary processing. Further, since the conductive pattern 1 for confirmation can be formed at the same time as the general circuit, it is not necessary to add the step of molding the conductive pattern 1.

[0025]

Second Embodiment FIGS. 3 and 4 show a second embodiment of the present invention.
FIG. 3 is a plan view of the conductive pattern. Also in this embodiment,
This is a case where the inner shape auxiliary processing is performed in two steps, the first and the second.

As shown in FIG. 3, in the conductive pattern 5, the lands 2 at both ends are connected by two parallel circuits 3a and 3b. The circuit 3a is used for primary processing and the circuit 3b is used for secondary processing. Mark as.

This embodiment is different from the first embodiment in that the conductive pattern 5 is provided in only one place independently of the wiring circuit, and other configurations are the same as those in the first embodiment.
The same members and the same components are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 4, with respect to the conductive pattern 5 having the above-mentioned structure, the die pin 4a is used in the primary processing of the outer shape and the inner shape.
The conductive pattern 3a for the primary processing is punched out, and the conductive pattern 3b for the secondary processing is punched out by the die pin 4b during the secondary processing. After that, by checking the presence or absence of conduction of the conductive pattern 5 by a check with a measuring device, it is possible to confirm the construction of the outer shape and the inner shape auxiliary processing.

If there is no continuity in the continuity check of the conductive pattern 5, it is assumed that the outer shape and inner shape auxiliary processing has been carried out. It is confirmed that the processing corresponding to is unprocessed.

In the case of performing the outer shape and inner shape auxiliary machining more than once, in the first embodiment, it is sufficient to provide the conductive patterns 1 in the number corresponding to the number of constructions. In the second embodiment, The number of parallel circuits 3a and 3b of the conductive pattern 5 may be set according to the number of constructions.

Further, it is desirable that the conductive patterns in the first and second embodiments are arranged at a position where they can be cut off from the substrate after confirmation of processing.

[0032]

According to the present invention, the outer shape and inner shape auxiliary processing of a printed wiring board can be checked at the same time and easily as a general circuit by a check with a measuring device without visually observing. The inspection can be automated.

[Brief description of drawings]

FIG. 1 is a plan view of an outer shape and an inner shape auxiliary processing confirmation conductive pattern showing a first embodiment of the present invention.

FIG. 2 is a plan view in which a circuit having the same conductive pattern is cut by a mold pin.

FIG. 3 is a plan view of an outer shape and an inner shape auxiliary processing confirmation conductive pattern showing a second embodiment of the present invention.

FIG. 4 is a plan view in which a circuit having the same conductive pattern is cut by a mold pin.

FIG. 5 is an explanatory diagram of a conventional method for confirming V-cut processing of a printed wiring board.

FIG. 6 is an enlarged view of the V-cut processing portion.

[Explanation of symbols]

 1, 5 Conductive pattern 2 Land 3 Circuit 4 Mold pin

Claims (1)

[Claims] 1. A conductive pattern for processing confirmation, which corresponds to the processing of the inner and outer shapes, when the outer shape and inner shape auxiliary processing of the printed wiring board is carried out at least twice on a single printed wiring board. With independent,
Confirm the execution of the outer shape and inner shape auxiliary processing by cutting the conductive pattern corresponding to each of the outer shape and inner shape auxiliary processing and then determining whether or not the conductive pattern is conductive. How to check the external shape and internal shape auxiliary processing of a printed wiring board.