JPH09214080A - Printed wiring board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printed wiring board which has an indicator which can simply indicates the result of judgment on whether each wiring pattern is good or bad and enables the worker to read the result, in a partially-good- type printed wiring board where circuits parts are mounted only on normal patterns out of a plurality of wiring patterns arranged on one board. SOLUTION: In the vacant region 30 of a printed wiring board 10, indicators 41 and 42 corresponding to each circuit block 21 and 22 are arranged to contact with the edge of the printed wiring board 10, in the vicinity of each circuit block, and perforations 51 and 52 along which the indicators can be folded and cut are made around these indicators 41 and 42. If a wiring pattern 21a is defective after inspection, the corresponding indicator 41 is folded and cut, making use of the perforation 51. At the time of mounting of circuit parts, this detects the existence of the indicators 41 and 42, a worker can surely read the result.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partial good type printed wiring board in which a plurality of wiring patterns are formed and circuit components are mounted only on normal wiring patterns. It is a thing.

[0002]

2. Description of the Related Art In a multi-sided printed wiring board in which a plurality of independent circuit blocks are arranged on one printed wiring board, circuit components are attached, and then each circuit block is divided, the yield is increased. To improve, mount circuit components only on normal circuit blocks on the wiring pattern surface,
The so-called partial good type is often adopted. FIG. 2 shows a plan view of a soldering surface of a conventional partial good type printed wiring board. Printed wiring board 1
Has a soldering surface A for soldering circuit components on one surface of the insulating substrate and a circuit component mounting surface B for mounting circuit components on the opposite surface. Further, circuit blocks 2 and 3 which are a plurality of product parts are arranged in the central part of the printed wiring board 1, and an empty region 4 which is a dummy part is arranged in the peripheral part. In order to determine whether the circuit blocks 2 and 3 are good or bad, the soldering surface A of the empty area 4 is provided with identification marks 5a and 6a corresponding to the wiring patterns 2a and 3a of the soldering surface A of the circuit blocks 2 and 3, respectively. ing. Further, identification marks 5b and 6b corresponding to the wiring patterns 2b and 3b on the circuit component mounting surface B are provided in the empty area 4 on the circuit component mounting surface B, respectively. These identification marks 5a, 6
The a, 5b, and 6b are formed on the printed wiring board 1 by copper foil or silk printing. In the printed wiring board 1 having such a configuration, in order to display whether or not the circuit components are mounted on the circuit blocks 2 and 3, the wiring patterns 2a, 3a, ... Of the circuit blocks 2 and 3 of the printed wiring board 1 are ... When it was judged to be defective by visual inspection or machine, the corresponding identification mark was filled with black ink or the like to judge the quality of each circuit block 2, 3.

[0003]

However, the conventional printed wiring board 1 has the following problems. (1) Like the printed wiring board 1 in FIG. 2, the soldering surface A
And wiring patterns 2a, 2b, on both sides of the circuit component mounting surface B
.., there is no need to mount circuit components on the circuit blocks 2 and 3 whose surface is defective. Therefore, for example, when the soldering surface A of the circuit block 2 is inspected and determined to be defective, the corresponding identification mark 5a is painted with black ink, and the identification mark 5b on the circuit component mounting surface B is also black ink at the same time. Since the work of painting is required, the number of steps for painting the identification mark is large. (2) At the time of mounting the circuit component, for example, the identification mark portion is irradiated with light, and whether or not the black ink is applied is detected based on the degree of reflection, and whether or not the circuit component is mounted is determined.
For this reason, there is a problem in that the degree of light reflection differs depending on the density of the black ink applied, and the quality of the circuit block is inaccurately determined. SUMMARY OF THE INVENTION The present invention provides a printed wiring board that solves the problems of the above-mentioned conventional technique with respect to the number of markings of the identification mark and the inaccuracy of reading the identification mark.

[0004]

In order to solve the above-mentioned problems, the printed wiring board of the first invention has a circuit block formation region and an empty region located inside or outside the circuit block formation region. It is composed of an insulating substrate. Then, a plurality of adjacent circuit blocks formed by a wiring pattern for mounting circuit components in the circuit block formation region, and a plurality of notches formed in the empty region and corresponding to each of the circuit blocks. And a display unit for interposing in each of the cutouts and being connected by a connecting portion which can be cut by pressing with respect to the cutouts, and which displays a quality judgment result of the wiring pattern. . The printed wiring board of the second invention is composed of an insulative substrate having a circuit block formation region and an empty region located outside the circuit block formation region. A plurality of adjacent circuit blocks formed by a wiring pattern for mounting circuit components in the circuit block forming area, and the empty area near each circuit block corresponding to each circuit block, A plurality of cutout portions formed on the outer edge of the substrate, and a connection portion that is interposed in each of the cutout portions and that can be cut by pressing on the cutout portions, and is connected to the wiring pattern. And a display unit for displaying. According to the first and second aspects of the invention, since the printed wiring board is configured as described above, the quality indication of each circuit block is displayed as follows. When the wiring pattern of each circuit block is inspected and determined to be defective, the display portion for displaying the quality determination result in the notch portion provided corresponding to the defective circuit block is cut by pressing. When it is judged to be good, the display section is left as it is.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment FIG. 1 is a plan view of a printed wiring board showing a first embodiment of the present invention as seen from the soldering surface. The printed wiring board 10 includes a soldering surface A for soldering a circuit component on one surface of an insulating substrate, a copper foil for a circuit component mounting surface B for mounting a circuit component on the opposite surface, and the like. It is a double-sided substrate having a conductive layer of. In the circuit block formation area located at the center of the printed wiring board 10, circuit blocks 21 and 22 which are product parts are arranged, and in the peripheral area, an empty area 30 is arranged. Wiring patterns 21a and 22a are formed on the soldering surface A of the circuit blocks 21 and 22, and wiring patterns 21b and 22b are similarly formed on the circuit component mounting surface B on the back side although not shown. Circuit block 2
1 and 22 and the empty area 30 have perforations 31a and 31 formed of a large number of small holes linearly arranged to separate the circuit blocks 21 and 22 after mounting the circuit components.
b, 32a, 32b, 32c are provided. Also,
In the empty area 30, the display unit 4 for displaying the quality judgment result of the wiring patterns corresponding to the circuit blocks 21 and 22.
1, 42 are provided near the circuit blocks 21, 22, respectively, and one side thereof is in contact with the outer edge of the printed wiring board 10. Each of these circuit blocks 41, 42
Are connected by connecting portions (for example, perforations) 51 and 52 that can be easily broken by pressing, and are arranged so that a cutout portion is formed when they are broken. Such a printed wiring board 10 is manufactured, for example, by forming a wiring pattern on a copper clad laminate, etching and removing resist, and then making holes. Next, a description will be given of the identification display of the quality of each of the circuit blocks 21 and 22 in the printed wiring board 10 manufactured in this way and the determination method thereof. As a result of inspecting the wiring patterns 21a and 22a on the soldering surface A of the printed wiring board 10, for example, it is assumed that the wiring pattern 21a of the circuit block 21 is good and the wiring pattern 22a of the circuit block 22 is defective. In this case, the display unit 41 corresponding to the circuit block 21 is left as it is, and the display unit 42 corresponding to the circuit block 22 is cut off using the perforations 52. FIG. 3 shows a plan view of the printed wiring board 10 in which the display section 42 is notched in this way.

After inspecting the wiring patterns 21a and 22a on the soldering surface A of the printed wiring board 10, the wiring patterns 21b and 22b on the circuit component mounting surface B are inspected. This time,
The display portion 42 corresponding to the circuit block 22 is cut away, and it is immediately known that the circuit block 22 has already been determined to be defective. Therefore, the wiring pattern 2 of the circuit block 22 is determined.
2b is not inspected, but only the wiring pattern 21b of the circuit block 21 is inspected. The processing based on the inspection result is the same as that for the soldering surface A. Next, in the case of mounting a circuit component on the printed wiring board 10, for example, the display unit is irradiated with light, and the transmitted light is detected by a photodetector to determine the broken state of the display unit. 21,
It is determined whether or not the circuit component can be mounted on 22. In the case of the printed wiring board 10 of FIG. 3, since the display unit 41 is present, the emitted light is blocked by the display unit 41, and the output of the photodetector is turned off. As a result, it is determined that the display unit 41 exists, that is, the circuit block 21 is good, and the circuit component is mounted on the circuit block 41. On the other hand, since the display section 42 is notched, the output of the photodetector is turned on.
Accordingly, it is determined that the display unit 42 does not exist, that is, the circuit block 22 is defective, and the circuit component is not mounted on the circuit block 22. As described above, the printed wiring board 10 according to the first embodiment has the perforations 51, 52 for notching.
Since the display portions 41 and 42 surrounded by are provided, when a defect is found in the inspection of the circuit blocks 21 and 22, it is possible to easily display the pass / fail by simply notching the corresponding display portion 41 or the like. Furthermore, this folded state shows the printed wiring board 1
Since it can be recognized from both the soldering surface A of 0 and the circuit component mounting surface B, the laborious work of painting the identification marks of both the soldering surface A and the circuit component mounting surface B with black ink as in the conventional case There is an advantage that it becomes unnecessary.
Further, when mounting a circuit component on the printed wiring board 10, since the presence or absence of the display portion is checked, the determination is extremely clear, and there is an advantage that there is no risk of erroneous determination due to shading of conventional black ink or the like.

Second Embodiment FIG. 4 is a plan view of a printed wiring board showing a second embodiment of the present invention. Elements common to those in FIG. 1 are designated by common reference numerals. . This printed wiring board 10A is shown in FIG.
The printed wiring board 1 is different from the printed wiring board 10 of FIG.
There are no empty areas around 0A and the circuit blocks are arranged in two columns. Originally, a vacant area in a multi-sided printed wiring board is an odd portion when a plurality of circuit blocks of an arbitrary size are taken from a standard size substrate. Usually, such a vacant area is arranged in the peripheral portion of the printed wiring board, and is used as an auxiliary role in various processing steps such as providing a reference hole for positioning. However, these auxiliary roles can be fulfilled even by using the empty area in the circuit block, so that the empty area is not necessarily required in the peripheral portion of the printed wiring board. In the printed wiring board 10A, portions where no wiring pattern exists inside the circuit blocks 21, 22 and the like are used as the display portions 41, 42 and the like. Then, the perforation 5 for notch is formed so as to surround the display portions 41, 42 and the like.
1, 52, etc. are provided. Printed wiring board 1 like this
0A is manufactured similarly to the first embodiment. The identification display of the quality of each of the circuit blocks 21, 22 and the like on the printed wiring board 10A manufactured as described above and the determination method thereof are the same as in the case of the first embodiment. As described above, in the printed wiring board 10A of FIG. 4, in the printed wiring board in which there is no empty area in the peripheral portion, the portion where no wiring pattern exists in each circuit block is used as the display portion, so that the board is effective without waste. There is an advantage that can be used for. The present invention is not limited to the above embodiment, and various modifications can be made. For example, there are the following modifications.

(A) The printed wiring board 10 shown in FIG. 1 is a double-sided board, but a single-sided board is also applicable. (B) The printed wiring board 10 in FIG. 1 is a two-piece printed wiring board, and the printed wiring board 10A in FIG. 4 is a four-piece printed wiring board of the partial good type. It is possible. (C) In the first embodiment, for example, the circuit block 22
Although the display portion 42 corresponding to the case is defective, the display portion 42 may be folded when the circuit block is good. (D) In the printed wiring boards 10 and 10A of FIGS. 1 and 4, perforations 31a, 32a, ... For separating the circuit blocks 21, 22, .. If separation is possible without affecting the block, it is not necessary to previously provide perforations 31a and the like. (E) In the printed wiring boards 10 and 10A shown in FIGS. 1 and 4, the display portion 41 and the like are surrounded by perforations 51 and the like, but the perforation is not limited and the display portion 41 and the like can be easily formed. It is also possible to leave one or several connecting portions so that they can be folded and to surround the periphery with a punching hole. Further, it may be surrounded by a recess so as to reduce the wall thickness of the display portion 41 and the like.

[0009]

As described above in detail, according to the first invention, in the partially good type printed wiring board, the notch portion corresponding to each circuit block is formed in the empty area where the wiring pattern does not exist. However, a display portion that can be easily cut is formed in this cutout portion. With this, when the wiring pattern is inspected and is defective, the quality of each circuit block can be easily displayed by cutting the display unit. Further, since the presence or absence of the display portion can be identified from the front surface or the back surface of the board, even in the case of a double-sided board, it is sufficient to provide only one place for each circuit block
It is possible to reduce the labor for displaying the inspection result. Moreover, when the circuit component is mounted, the quality of the circuit block is determined based on the presence / absence of the display unit, so that it is possible to reliably determine whether or not the circuit component can be mounted. According to the second aspect of the present invention, the notch is provided in the outer edge of the printed wiring board near each circuit block by utilizing the empty area between the circuit block formation area and the outer edge of the printed wiring board. Therefore, the same effect as that of the first invention can be obtained, and when the wiring pattern is inspected and the display portion corresponding to the defective circuit block is cut off, the display portion of another circuit block is not misaligned or normal. There is an effect that there is no possibility of causing inconvenience such as damage to various circuit blocks.

[Brief description of drawings]

FIG. 1 is a plan view of a printed wiring board showing a first embodiment of the present invention.

FIG. 2 is a plan view of a conventional printed wiring board.

FIG. 3 is a plan view of the printed wiring board of FIG. 1 in which a display portion is notched with respect to a defective circuit block.

FIG. 4 is a plan view of a printed wiring board showing a second embodiment of the present invention.

[Explanation of symbols]

 10, 10A Printed wiring board 21, 22, 23, 24 Circuit block 21a, 22a, 23a, 24a Wiring pattern 30 Free space 41, 42, 43, 44 Display section 51, 52 Perforations

Claims (2)

[Claims] 1. An insulating substrate having a circuit block formation region and an empty region located inside or near the circuit block formation region, and a wiring pattern for mounting circuit components in the circuit block formation region. A plurality of adjacent circuit blocks formed, a plurality of notches located in the empty area and formed corresponding to each of the circuit blocks, and interposed in each notch, and the notches A printed wiring board, comprising: a display unit that is connected to the unit by a connecting unit that can be cut by pressing and that displays a quality determination result of the wiring pattern. 2. An insulating substrate having a circuit block formation region and an empty region located outside the circuit block formation region, and a plurality of wiring patterns formed in the circuit block formation region with wiring patterns for mounting circuit components. Adjacent circuit blocks, a plurality of notch portions formed in the outer edge of the substrate in the empty area near each circuit block corresponding to each circuit block, and in each notch portion A printed wiring board, comprising: a display portion that is interposed and that is connected to the cutout portion by a connecting portion that can be cut by pressing, and that displays a quality determination result of the wiring pattern.