JP2001144384A - Multiple printed circuit board body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable reduction of cost by rationalizing manufacturing steps and by improving the yield of a board and enable accurate division into individual printed circuit board through simple operations. SOLUTION: A multiplicity of individual printed circuit boards 3, which have each a circuit pattern formed on its major surface, have at least one side edges linked separatably by means of ear pieces 5 and can be mutually divided via a division guide 8, are formed. The division guide 8 includes a division guide slit 4 for separation of the printed circuit boards 3, a linkage piece 16, formed halfway the slit for linkage between adjacent ones 3 and 3 of the printed circuit boards, and a pair of cutout grooves 17 and 18 formed between the linkage piece 6 and printed circuit boards 3 and 3 respectively. With respect to the cutout grooves 17 and 18, a cutout 'h' of the groove 17 of one side 3a of the printed circuit boards divided previously is set larger than a cutout 'm' of the groove 18 in the other board 2b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collective print in which an appropriate circuit pattern is formed on a main surface of a copper foil or the like, and a number of individual printed circuit boards which are divided at the time of use are connected so as to be capable of being divided. Regarding the substrate.

[0002]

2. Description of the Related Art A printed circuit board has an appropriate circuit pattern formed thereon and various electronic components and circuit elements mounted thereon, and is used in various technical fields. As the printed circuit board, for example, a substrate formed of a paper phenol laminate, a copper epoxy material, a glass epoxy material, a ceramic material, or the like is used. Printed circuit board
For example, a photosensitive resist is applied on the main surface of the substrate by offset printing, silk screen printing, or the like, exposure processing is performed, and unnecessary copper foil portions are removed by etching to form a predetermined circuit pattern.

A large number of through holes, terminal holes, and the like are formed on a printed circuit board by precision press. The printed board is subjected to a process such as an under-resist printing process, carbon printing for electrode formation, or a heat-resistant pre-flux process, as necessary.

[0004] Printed circuit boards have electronic components and circuit elements,
There are a single-sided type mounted on one main surface and a double-sided type mounted on the front and back main surfaces. For printed circuit boards, except for large-sized boards, many individual printed boards with the same specifications are generally separated from each other for large-sized original plates due to rationalization in manufacturing and ease of handling during transportation or assembly of equipment. It is provided in the form of a collectively printed circuit board that can be formed. As shown in FIG. 3, a conventional collective printed circuit board 50 includes a plurality of individual printed circuit boards 51 (51a to 51a).
A substrate 52 made of a paper phenol laminate or the like having a size sufficient to form 1n) is used. The substrate 52 includes
Split guides 53 parallel to each other along both longitudinal edges
By forming (53a, 53b) respectively, ear pieces 54 (54a, 54b) that can be separated from the formation area of each individual printed circuit board 51 are formed. Substrate 52
Are formed with divided guide grooves 55 (55a to 55n-1) that divide the individual printed circuit boards 51. As shown in FIG. 4, the divided guide groove 55 is formed of a V-shaped groove formed on one main surface of the substrate 52.

[0005] As shown in the figure, the divided guides 53 are alternately formed at predetermined intervals, each having a relatively large rectangular divided guide groove 56 (56a, 56b) and a slightly small rectangular divided guide groove 57. (57a, 57b) and the divided guide groove 5 formed between these divided guide grooves 56, 57.
8 (58a, 58b). Dividing guide groove 58
Like the division guide groove 55 for dividing the individual printed circuit board 51, the groove 52 is also formed by a V groove formed on one main surface of the substrate 52. Divided guide grooves 55 are formed between the large divided guide grooves 56a and 56b to divide the individual printed circuit board 51 across the board 52 in the width direction.

In the collective printed circuit board 50, the divided guide grooves 55 for dividing the individual printed circuit boards 51 and the divided guide grooves 58 of the divided guide 53 may be formed by perforations, for example. In the collective printed circuit board 50, a predetermined circuit pattern (not shown) is formed and a large number of through holes and terminal holes are formed in each individual printed circuit board 51 divided by the division guide concave groove 55. As described above, in the collective printed circuit board 50, the individual printed circuit boards 51 are integrally connected by the ear pieces 54 on both side edges. The collective printed circuit board 50 is supplied to a mounting device or the like in this state, and electronic components, circuit elements, and the like are mounted on the individual printed circuit boards 51, respectively. The collective printed circuit board 50 is supplied with solder from a mounting device to a reflow solder bath, and the mounted electronic components, circuit elements, and the like are soldered to the terminals of the corresponding circuit patterns. The collective printed circuit board 50 configured as described above is supplied to the device assembling process after the continuity test and the operation test of each individual printed circuit board 51 are collectively performed in the inspection process. Collective printed circuit board 5
In the step 0, each individual printed circuit board 51 is sequentially divided by the automatic cutting machine or the operator via the division guide 53 and the division guide groove 55 in the apparatus assembling step, and the assembly into the apparatus is performed. Of course, the collective printed circuit board 50 is not limited to manufacturing and assembling by the above-described steps.

[0007]

By the way, in the above-mentioned conventional collective printed circuit board 50, the divided guide grooves 56 and 57 of the divided guide 53 penetrating the substrate 52, and the divided guide grooves 55 and 58 with the bottom are provided. However, there is a problem that the number of steps is increased because the is formed in a separate step. Further, in the collective printed circuit board 50, as described above, the ear pieces 5 for connecting the individual printed circuit boards 51 are provided.
4 are formed along both side edges of the substrate 52. In the collective printed circuit board 50, since the ear pieces 54 formed on both sides are not used as products, there is a problem that the use efficiency of the board 52, that is, the yield is poor.

In the collective printed circuit board 50,
A relatively large force was required to divide each individual printed circuit board 51 via the division guide groove 55 with the bottom. Further, in the collective printed circuit board 50, each individual printed circuit board 51 is divided via the division guide groove 55. At this time, cracks occur in the product area from the broken portions of the division guide groove 55, and circuit patterns and the like are generated. Could be damaged. Furthermore, in the collective printed circuit board 50, there is a problem that the broken portion of the divided guide groove 55 causes a jagged portion on the outer peripheral portion, which may damage an operator when assembling the device or the like.

SUMMARY OF THE INVENTION Accordingly, the present invention provides a collective printed circuit board which can reduce the cost by rationalizing the manufacturing process and improve the yield from the board, and can divide each individual printed circuit board accurately by a simple operation. It is intended for.

[0010]

A collective printed circuit board according to the present invention that achieves this object has an appropriate circuit pattern formed on a main surface thereof by a copper foil or the like and can separate at least one side edge. A large number of individual printed circuit boards are formed, which are connected to each other by ear tabs and can be divided from each other via division guides. The collective printed circuit board
Dividing guides, dividing guide slits for dividing individual printed circuit boards from each other, connecting pieces formed in the middle of the dividing guide slits for connecting adjacent individual printed circuit boards, and between the connecting piece and the individual printed circuit boards, respectively. And a pair of cut grooves formed. In the collective printed circuit board, the pair of cut grooves are formed such that the cut groove on one of the individual printed circuit boards that is divided first has a larger cut amount than the cut groove on the other individual printed circuit board that is divided later. Do it.

In the collective printed circuit board, a connecting piece for connecting adjacent individual printed circuit boards is formed near the other side edge portion facing the ear portion. Further, in the collective printed circuit board, each cut groove is formed such that the shape of the tip portion has a substantially arc shape. According to the collective printed circuit board of the present invention configured as described above, the individual printed circuit boards are connected to each other by the ears on one side and the plurality of connecting pieces on the other side. The yield of the part can be improved. Further, according to the collective printed circuit board, for a pair of cut grooves forming the connecting piece, the cut amount of the cut groove on the individual printed circuit board side divided first is set to the cut amount of the cut groove on the individual printed circuit board side divided later. Since it is formed larger than the cut amount, the individual printed circuit boards are divided in order by a small force, and the breakage of the circuit pattern and the like due to the crack from the broken portion is suppressed.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. The aggregate printed circuit board 1 shown in the drawings as an embodiment includes a large number of pieces on a substrate 2 made of a paper phenol laminate or a synthetic resin plate having a copper-clad surface similarly to the above-described conventional collective printed circuit board 50. Of the individual printed circuit boards 3 (3a to 3n) are formed so as to be separable from each other. The collective printed circuit board 1 is subjected to an exposure process after a photosensitive resist is applied to a corresponding area of each individual printed circuit board 3 by offset printing, silk screen printing, or the like, and further subjected to an etching process, thereby making unnecessary copper foil unnecessary. The part is removed to form a predetermined circuit pattern.

The collective printed circuit board 1 is subjected to an under-resist printing process, a carbon printing process for forming electrodes, or a heat-resistant pre-flux process, if necessary, in the corresponding area of each individual printed circuit board 3. You. In addition, through holes, terminal holes, and the like are formed in the collective printed circuit board 1 by precision press in accordance with the circuit pattern of each individual printed circuit board 3 and the like. In the collective printed circuit board 1, the widthwise divided guide slits 4 (4a to 4n-
According to 1), the individual printed circuit boards 3 are formed on the substrate 2 in a state where they are arranged in the width direction.

The collective printed circuit board 1 is supplied to a mounting device or the like, and electronic components and circuit elements are mounted at predetermined positions on each individual printed circuit board 3.
The collective printed circuit board 1 is supplied with solder from a mounting device to a reflow solder bath, and the mounted electronic components, circuit elements, and the like are soldered to the terminal portions of the corresponding circuit patterns. In this state, the collective printed circuit board 1 is transported to an equipment assembling process, and the individual printed circuit boards 3 are sequentially separated and assembled as described later. Of course, collective printed circuit board 1
Depending on the contents of the process, the electronic components and the like may be mounted in a state of being divided into the individual printed circuit boards 3.

Each of the individual printed circuit boards 3 is formed of a substantially rectangular portion having the same shape, and a first divided guide 6 which will be described in detail later with respect to an ear piece 5 formed along one side edge of the board 2. (6a to 6n) are connected so as to be separable. Adjacent ones of the individual printed circuit boards 3 are separably connected to each other via a second division guide 7 (7a to 7n-1) at a substantially central portion of the division guide slit 4 in the longitudinal direction. In the vicinity of the other side edge facing the ear piece 4, a third divided guide 8 (8
a to 8n-1).

Each of the divided guide slits 4 has one end reaching the inner edge of the lug 5 and the other end opened to the side edge of the substrate 2. As shown in FIG. 1, each of the divided guide slits 4 has a generally funnel shape in which the notch width is gradually reduced from both ends toward the central second divided guide 7. Each of the divided guide slits 4 has a portion on the side of the ear piece 5 having an arc shape on both sides thereof, so that the edge of each individual printed circuit board 3 has an arc shape. Although the details of the divided guide slits 4 are omitted, the distal end portion of the second divided guide 7 is formed in an arc shape.
Each of the divided guide slits 4 allows the second divided guide 7 to be accurately broken from the center by such a shape.

The ear pieces 5 connect the individual printed circuit boards 3 so as to be separable as described above, and also have positioning means (not shown) for forming a circuit pattern or the like and for supplying the collective printed circuit board 1 to an assembly process. Are formed. Since the lug 5 is a portion that is discarded as unnecessary material after all the individual printed circuit boards 3 are separated, it is preferable that the lug 5 be small in a range in which necessary mechanical strength is maintained.

As shown in FIG. 1, the first divided guide 6 has a pair of semicircular divided guide holes 9 (9a, 9) formed at predetermined intervals corresponding to the individual printed circuit boards 3.
b), a divided guide groove 10 for separating the individual printed circuit board 3 and the ear piece 4 between the divided guide holes 9, and on both sides of each divided guide hole 9 located on an extension of the divided guide groove 10. And the sewing machine hole 11 formed. First
The dividing guide 6 connects the individual printed circuit boards 3 and the ear pieces 5 at the sewing machine hole 11 and also allows easy division.

The second divided guide 7 has a circular small hole 12.
And a short divided guide groove 13 integrally and continuously provided from the small hole 12 toward the ear piece 5, and a plurality of sewing machine holes 1 formed on both sides of the small hole 12 and the divided guide groove 13, respectively.
4 and 15. The second division guide 7 is formed such that the above-described parts are located on the same line as the division guide slit 4. The second division guide 7 includes the sewing machine holes 14 and 1.
The central portions of the individual printed circuit boards 3 adjacent to each other in the five portions are connected to each other, and the individual printed circuit boards 3 can be easily divided.

As shown in FIGS. 1 and 2, the third divided guide 8 is formed near the opening end of the slightly widened divided guide slit 4 on the side facing the lug 5. The third division guide 8 includes a connecting piece 16 for connecting adjacent individual printed circuit boards 3 to each other, and a pair of left and right cut grooves 17 (17a, 17a, 17b), 18 (18a, 18b)
And a plurality of sewing machines 19 and 20 formed between the cut grooves 17 and 18, respectively. Third division guide 8
Is a cutting groove 17 and a sewing machine 19, and a cutting groove 18
And the sewing machine 20 are formed on the same line that constitutes both side edges of the divided guide slit 4.

The collective printed circuit board 1 is composed of an individual printed circuit board 3a on the left side and an individual printed circuit board 3 on the right side in FIG.
It is sequentially divided in this order toward b and 3c. As shown in detail in FIG. 2, the third division guide 8 is provided with a cut groove 17a on one of the individual printed circuit boards 3a which is divided first.
17b is the cut amount h1, h of the connecting piece 16
2, the cut amounts m1 and m2 of the cut grooves 18a and 18b on the side of the other individual printed circuit board 3b to be divided later.
It is formed larger than.

The third dividing guide 8 includes cut grooves 17a, 17b and cut grooves 18 located on both sides of the connecting piece 16.
a, 18b, a plurality of sewing machine holes 1 are provided.
The holes 9 and 20 are formed at substantially equal intervals. Therefore, as shown in FIG. 2, the third division guide 8 has two sewing holes 19 formed on the side of the individual printed circuit board 3a to be divided first and three on the side of the individual printed circuit board 3b to be divided later. Is formed. Further, in the third divided guide 8, each of the above-described cut grooves 17 and 18 is formed such that the distal end thereof has a substantially arc shape as shown in FIG.

The third dividing guide 8 configured as described above connects the individual printed circuit board 3a to be divided first and the divided piece 16 by the uncut portions of the cut groove 17 and the sewing machine hole 19, and Then, the individual printed circuit board 3b to be divided later and the divided piece 16 are connected by the uncut portions of the cut groove 18 and the sewing machine hole 20. The third divided guide 8 is formed with respect to the connecting piece 16 by forming the cut amount h of the cut groove 17 on the individual printed circuit board 3a side to be larger than the cut amount m of the cut groove 18 on the individual printed circuit board 3b side. The individual printed circuit board 3a is divided first. Therefore, the collective printed circuit board 1 is
Are divided in order from the left side in FIG.

The third division guide 8 is provided with cut grooves 17, 1
8 is formed in an arc shape so that the individual printed circuit board 3
And the stress generated when the connecting piece 16 is divided is concentrated at the center. Therefore, the third division guide 8
Are formed in the cut grooves 17, 18 and the perforations 19, 18 without cracking toward the inside of the individual printed circuit board 3.
The individual printed circuit boards 3 and the connection pieces 16 are divided by causing a crack along the line 20. Third division guide 8
In this way, a highly accurate division that does not cause damage to a circuit pattern or the like is performed.

In the collective printed circuit board 1 described above, each of the individual printed circuit boards 3 is connected on one side by a lug 5 via a first divided guide 6 and is adjacent to each other. At the substantially central portion in the longitudinal direction, a third piece 3 is provided via a second split guide 7 and
Although one side facing the above is arranged continuously through the third division guide 8, the present invention is not limited to this configuration. In the collective printed circuit board 1, the second divided guide 7 and the third divided guide 8 are integrated, a divided guide is formed at a central position of these, and the individual printed circuit boards 3 are connected to each other. Is also good.

Further, the collective printed circuit board 1 has a pair of substantially funnel-shaped divided guide slits 4 for dividing the individual printed circuit boards 3, but it is a matter of course that the present invention is not limited to such a shape.

[0027]

As described above in detail, according to the collective printed circuit board according to the present invention, the individual printed circuit boards are connected to each other by the ears on one side and the plurality of connecting pieces on the other side. With this configuration, the number of non-product parts is small, and the yield of the substrate can be improved. Further, according to the collective printed circuit board, for the pair of left and right cut grooves forming the connecting piece, the cut amount of the cut groove on the individual printed circuit board side divided first is set to the cut groove on the individual printed circuit board side divided later. By setting the amount larger than the amount, it is possible to divide the individual printed circuit boards in order with a relatively small force, and it is also possible to suppress breakage of a circuit pattern or the like due to a crack from a rupture portion, thereby performing accurate division.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a collective printed circuit board shown as an embodiment of the present invention.

FIG. 2 is a main part front view for explaining a detailed configuration of a third division guide formed on the same printed circuit board.

FIG. 3 is a front view of a main part of a conventional collective printed circuit board.

FIG. 4 is a vertical sectional view of an essential part for explaining a configuration of a divided guide groove formed in the printed circuit board;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Collective printed circuit board 2 Substrate 3 Individual printed circuit board 4 Division guide slit 5 Ear piece 6 1st division guide 7 2nd division guide 8 3rd division guide 16 Connecting piece 17 1st cut groove 18 2nd cut groove 19 sewing machine hole 20 sewing machine hole

Claims (3)

[Claims] 1. An appropriate circuit pattern is formed on a main surface by a copper foil or the like, and at least one side edge is continuously provided by ear pieces that can be separated, and can be separated from each other via a division guide. A plurality of individual printed circuit boards are formed, and the division guide is a division guide slit that divides the individual printed circuit boards from each other, and a connection piece that is formed in the middle of the division guide slit and connects adjacent individual printed circuit boards. And a pair of cut grooves respectively formed between the connecting piece and the individual printed circuit boards on both sides, and the pair of cut grooves are cut grooves on one of the individual printed circuit board sides which are divided first. A collective printed circuit board, wherein the cut amount is formed to be larger than the cut amount of the cut groove on the other individual printed circuit board side to be divided later. 2. The collective printed circuit board according to claim 1, wherein the connection piece is formed near the other side edge portion facing the ear portion. 3. The collective printed circuit board according to claim 1, wherein the cut groove is formed so that a tip portion has a substantially arc shape.