JP4144595B2 - PCB containing multiple individual PCBs - Google Patents

Description

  The present invention relates to a printed circuit board, and more particularly to a printed circuit board including a plurality of individual printed circuit boards.

  Various printed circuit boards are used in electronic devices, and recently, with the miniaturization of electronic components, very small printed circuit boards have come to be used. When using a small printed circuit board, in order to reduce cost and manufacturing man-hours, by using a printed circuit board that combines multiple printed circuit boards (hereinafter referred to as "individual printed circuit boards"), it is possible to use multiple printed circuit boards simultaneously. The method of implementing is adopted. Specifically, a program for mounting a component on a printed circuit board composed of a plurality of individual printed circuit boards is installed in the automatic mounting apparatus. After mounting the component on the printed circuit board using the automatic mounting apparatus, Separate individual printed circuit boards.

  In general, when a single printed circuit board is configured by combining a plurality of individual printed circuit boards, the plurality of individual printed circuit boards are arranged so that the long sides and the short sides are adjacent to each other, and the directions of the individual printed circuit boards are aligned ( In other words, the individual printed circuit boards are arranged in parallel with each other. For example, as shown in FIG. 6, two individual printed circuit boards 61 are arranged on the printed circuit board 60 so that the long sides thereof are adjacent to each other.

  The printed circuit board 60 of FIG. 6 differs in the component mounting configuration of the printed circuit board 60 when viewed from the arrow A direction and when viewed from the arrow B direction. Therefore, when mounting the printed circuit board 60 on the automatic mounting apparatus, it is necessary to make the directions of the printed circuit board 60 coincide with each other, and the working efficiency is extremely deteriorated. For example, when a program for mounting components in the A direction is installed in the automatic mounting apparatus, the printed circuit board 60 must be mounted in the automatic mounting apparatus in the A direction. If the printed circuit board 60 is mistakenly mounted in the automatic mounting apparatus in the B direction, a component mounting error occurs, resulting in a defective product, or the operation of the automatic mounting apparatus stops halfway.

  Furthermore, it is desired to configure a large number of individual printed circuit boards 61 by one printed circuit board 60 in order to reduce costs and manufacturing man-hours. For example, it is assumed that the printed circuit board 60 in FIG. 6 has a substantially square shape with one side of 245 mm, and the individual printed circuit board 61 has a substantially rectangular shape with a long side of 138 mm and a short side of 87 mm. In this case, as shown in FIG. 6, only two printed circuit boards 61 can be formed on the printed circuit board 60 at the maximum. This is because if the long side 138 mm is doubled, it becomes 276 mm, which exceeds the side 245 mm of the printed board 60, and if the short side 87 mm is tripled, it becomes 268 mm, which exceeds the side 245 mm of the printed board 60. Therefore, in this configuration, the area of the discarded substrate (the portion not used as the individual printed circuit board 61) becomes very large. The individual printed circuit board composition ratio (the ratio of the area of the individual printed circuit board 61 to the area of the printed circuit board 60) is 40% ((138 mm × 87 mm × 2) / (245 mm × 245 mm)), and the area of the discarded substrate is very large. It gets bigger.

  As described above, the general dimensions of the printed circuit board 60 in which only a maximum of two individual printed circuit boards can be configured are as follows: the long side of the individual printed circuit board 61 is p; Then, p <r <2p and 2q <r <3q. The reason why the size of the printed circuit board is limited as described above is as follows. This is because a method of making one side of a printed circuit board to have a constant size is generally adopted so that it can be used without changing the rail width of an automatic mounting apparatus or solder dip machine when switching the product number of the printed circuit board. . For example, if the printed circuit board has a side of 245 mm, the rail width is 245 mm, and the other product numbers need to be matched with it. By doing so, it is not necessary to change the rail width at the time of switching the product number, so it is not necessary to stop the automatic mounting apparatus and the solder dip machine, and the man-hour can be increased.

Japanese Patent Laid-Open No. 2000-223796

  One object of the present invention is to provide a printed circuit board that can improve the working efficiency of the mounting process. Another object of the present invention is to provide a printed circuit board in which a large number of individual printed circuit boards can be constituted by a single printed circuit board.

A printed circuit board according to a preferred embodiment of the present invention is a square printed circuit board including rectangular first to fourth individual printed circuit boards having a long side and a short side, and the first to fourth individual printed circuit boards. Are arranged in a state of being rotated by 90 degrees with respect to the other individual printed circuit boards adjacent to each other, so that when the printed circuit board is rotated by 90 degrees, the mounting configuration of the components of the entire printed circuit board is reduced. One short side of the first individual printed circuit board is adjacent to one long side of the second individual printed circuit board, and one long side of the first individual printed circuit board One short side of the individual printed circuit board is in a straight line, the other short side of the second individual printed circuit board is adjacent to one long side of the third individual printed circuit board, and the second individual printed circuit board The other long side of the substrate and the third individual block. One short side of the printed circuit board is in a straight line, the other short side of the third individual printed circuit board is adjacent to one long side of the fourth individual printed circuit board, and the third individual printed circuit board The other long side of the fourth individual printed circuit board is on a straight line, and the other short side of the fourth individual printed circuit board is the other long side of the first individual printed circuit board. And the other long side of the fourth individual printed circuit board and the other short side of the first individual printed circuit board are in a straight line.

  Since the mounting configuration of the components of the entire printed circuit board is the same even when rotated 90 degrees, it is not necessary to mount the printed circuit board on the automatic mounting apparatus with the same direction of the printed circuit board as in the prior art. Therefore, the work efficiency is greatly improved. Since there is no directionality of the printed circuit board, it is possible to prevent the mounting of the printed circuit board in a different direction by mistake and cause a component mounting failure or stop the automatic mounting process on the way. Since four or more individual printed circuit boards are arranged on a substantially square printed circuit board, each individual printed circuit board can be arranged so that the component mounting configuration of the entire printed circuit board does not change even when rotated 90 degrees.

  One individual printed circuit board is arranged in a state rotated 90 degrees with respect to another adjacent individual printed circuit board. Therefore, when the printed circuit board is rotated 90 degrees, the mounting configuration of the components of the entire printed circuit board can be made the same. In addition, by arranging the individual printed circuit boards in this way, many individual printed circuit boards can be configured with respect to the substantially square printed circuit board. This is because the outer periphery of the shape obtained by combining the individual printed circuit boards is substantially square. Therefore, cost and work efficiency can be improved.

  The short side of one individual printed circuit board is adjacent to the long side of another individual print. Therefore, when the printed circuit board is rotated 90 degrees, it is possible to make the mounting configuration of the components of the entire printed circuit board the same. Furthermore, by arranging the individual printed circuit boards in this way, many individual printed circuit boards can be configured with respect to the substantially square printed circuit board. Therefore, cost and work efficiency can be improved.

  For example, when the entire printed circuit board is rotated 90 degrees clockwise, the first individual printed circuit board is at the position of the second individual printed circuit board, the second individual printed circuit board is at the position of the third individual printed circuit board, The third individual printed circuit board moves to the position of the fourth individual printed circuit board, and the fourth individual printed circuit board moves to the position of the first individual printed circuit board. Here, since the mounting configurations of the components of the first to fourth individual printed circuit boards are all the same, when the printed circuit board is rotated 90 degrees, the mounting configurations of the components of the entire printed circuit board can be made the same. .

  In a preferred embodiment, a plurality of individual printed circuit boards are further arranged on the outer periphery of the first to fourth individual printed circuit boards.

  By further arranging the individual printed circuit boards on the outer periphery of the first to fourth individual printed circuit boards so that the component mounting configuration of the entire printed circuit board is the same when the printed circuit board is rotated 90 degrees, A large number of individual printed circuit boards can be configured with the printed circuit board. This is because the discarded substrate is only the inner peripheral portion of the first to fourth individual printed circuit boards and the outer peripheral portion of the outermost individual printed circuit board, and the area ratio of the discarded substrate becomes very small.

  By arranging each individual printed circuit board so that the short side is adjacent to the long side of the other individual printed circuit board, the outer peripheral shape defined by each individual printed circuit board is substantially square. Accordingly, at least four individual printed circuit boards can be formed on a substantially square printed circuit board having a larger area than the square defined by the outer periphery of each individual printed circuit board. In other words, since the sum of the short side and the long side of the individual printed circuit board is smaller than one side of the printed circuit board, at least four individual printed circuit boards can be configured on the printed circuit board. Therefore, more individual printed circuit boards can be formed as compared with the conventional case (a printed circuit board that can form only two individual printed circuit boards).

  In the printed circuit board of the present invention, when the individual printed circuit boards are arranged so that the component mounting configuration of the entire printed circuit board is the same when rotated 90 degrees, the direction of the printed circuit board is set in the automatic mounting process. There is no need to match. Therefore, the work efficiency in the mounting process can be improved.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings. However, the present invention is not limited to these embodiments. FIG. 1 is a schematic diagram showing a printed circuit board 10 according to a preferred embodiment of the present invention. The printed circuit board 10 includes a plurality of individual printed circuit boards 11A to 11D and discarded substrates 12A and 12B. The printed board 10 is a board in which a plurality of individual printed boards are combined, and components (for example, ICs, resistors, capacitors, etc.) are mounted in units of the printed board 10. The individual printed circuit board is a board that is cut off from the printed circuit board and actually used in an electronic device or the like. In this example, the individual printed circuit board has a substantially rectangular shape including a long side and a short side (it is not necessary to be a complete rectangle, a part of the printed circuit board may be cut out depending on the application, and the corners may be curved. May be).

  Preferably, the printed circuit board 10 has the same mounting configuration (arrangement of components) of the entire printed circuit board 10 when rotated 90 degrees with respect to the center 13 of the printed circuit board 10 (90 degrees). , Or four times rotational symmetry), an individual printed circuit board is arranged. That is, the mounting configuration of the entire printed circuit board 10 is the same when viewed from any direction of the arrows A to D. In other words, the printed circuit board 10 has no directivity with respect to the four directions indicated by the arrows A to D.

  The printed circuit board 10 is substantially square and is a 90-degree rotationally symmetric substrate. Therefore, the directionality in the A to D directions of the printed circuit board 10 can be eliminated. In this example, the mounting configurations of the components of each individual printed circuit board are all the same, and typically at least four or more are arranged. The individual printed circuit boards 11 </ b> A to 11 </ b> D are arranged such that adjacent individual printed circuit boards are rotated by 90 degrees about the center 13 of the printed circuit board 10. For example, the individual printed circuit board 11A is a state in which the individual printed circuit board 11D is rotated 90 degrees clockwise, the individual printed circuit board 11B is in a state in which the individual printed circuit board 11A is rotated 90 degrees clockwise, and the individual printed circuit board 11C is the individual printed circuit board. 11B is a state in which the individual printed circuit board 11D is rotated 90 degrees clockwise, and the individual printed circuit board 11D is a state in which the individual printed circuit board 11C is rotated 90 degrees clockwise. Therefore, for example, when the printed circuit board 10 is rotated 90 degrees in the clockwise direction, the individual printed circuit board 11A is positioned at the individual printed circuit board 11B. Here, since the component mounting configurations of the individual printed circuit boards 11A to 11D are the same, the component mounting configuration of the entire printed circuit board 10 does not change.

  The individual printed circuit boards 11A to 11D are arranged so that the short sides thereof are adjacent to the long sides of the other individual printed circuit boards. Specifically, the short side (a side) of the individual printed circuit board 11A is adjacent to the long side of the individual printed circuit board 11B, and the short side (a side) of the individual printed circuit board 11B is adjacent to the long side of the individual printed circuit board 11C. The short side (a side) of the individual printed circuit board 11C is adjacent to the long side of the individual printed circuit board 11D, and the short side (a side) of the individual printed circuit board 11D is adjacent to the long side of the individual printed circuit board 11A. Preferably, the individual printed circuit boards 11 </ b> A to 11 </ b> D are arranged so that the outer peripheral shape thereof is substantially square. That is, when viewed from the direction of the arrow A, the long side (outer peripheral side) of the individual printed circuit board 11A and the short side (b side) of the individual printed circuit board 11B are substantially in a straight line. The same applies to the case of viewing from the directions of arrows B to D. By arranging in this way, as will be described in detail later, the individual printed circuit board composition ratio can be increased and the area ratio of the discarded board can be decreased.

  When mounting components on the printed circuit board 10 having the above-described configuration, first, a plurality of printed circuit boards 10 are housed in a cartridge and attached to the printed circuit board supply side of the automatic mounting apparatus. The automatic mounting apparatus draws the printed circuit boards 10 one by one on the board guide rail for board conveyance. Here, since the printed circuit board 10 of the present embodiment is configured to have a rotational symmetry of 90 degrees, when the printed circuit board is stored in the cartridge, it is not necessary to match the storage direction for each printed circuit board 10. Therefore, the working efficiency is improved extremely well. The printed circuit board 10 is conveyed on the rail, and the following processes are performed. First, a solder printing mask is applied to the printed circuit board 10, and cream solder is applied to the electrode joints of the mounted components on the printed circuit board 10 in the manner of screen printing (solder application process). An adhesive is applied to the component mounting position of the printed circuit board 10 by injection from a nozzle (adhesive application step). A component is mounted at a component mounting position on the printed circuit board 10 by a component mounting machine (component mounting process). The connection electrode part of the mounting component and the cream solder are joined by hot air or the like inside the reflow furnace (reflow process). Finally, the individual printed circuit boards 11A to 11D are separated (separation process). A program is installed in the automatic mounting apparatus so that the individual printed circuit boards 11A to 11D (that is, the entire printed circuit board 10) are simultaneously mounted as components in each process. As described above, the printed circuit board 10 has a rotational symmetry of 90 degrees, and there is no directionality in the directions of arrows A to D. Therefore, when storing the printed circuit board 10 in the cartridge, it is not necessary to match the directions. Work efficiency can be improved and components can be mounted accurately.

  Next, examples of the printed circuit board 10 of FIG. 1 will be described using actual dimensions (the present invention is not particularly limited to these dimensions). The printed circuit board 10 has a substantially square shape with a side of 245 mm. Each of the individual printed boards 11A to 11D has a substantially rectangular shape having a long side of 138 mm and a short side of 87 mm. These dimensions are the same as the dimensions of the printed circuit board 60 and the individual printed circuit board 61 of FIG. In the configuration of FIG. 1, even if the long side of one individual printed circuit board (for example, 11A) and the short side of another individual printed circuit board (for example, 11B) are combined, the total length of the long side and the short side is 225 mm. Therefore, it can be seen that one side fits on the printed circuit board 10 having 245 mm. Therefore, in the configuration of FIG. 6, only two individual printed boards can be configured, but in this example, four individual printed boards can be configured on one printed board 10. The individual printed circuit board configuration ratio (the ratio of the area of the individual printed circuit boards 11A to 11D to the area of the printed circuit board 10) is 80% ((138 mm × 87 mm × 4) / (245 mm × 245 mm)). Compared with the configuration of FIG. 6, the individual printed circuit board configuration ratio is very large. Therefore, the areas of the discarded boards 12A and 12B that are not used as the individual printed boards 11A to 11D can be extremely reduced.

  As shown in FIG. 1, the general dimensions of the printed circuit board 10 necessary for configuring four individual printed circuit boards are p for the long side of the individual printed circuit board, q for the short side, and r for one side of the printed circuit board 10. Then, p + q <r. When p + q is closer to r, the individual printed circuit board composition ratio can be increased.

  In the configuration of FIG. 1, a 90-degree rotationally symmetric individual printed circuit board can be provided instead of the discarded board 12A. This individual printed circuit board is a printed circuit board different from the individual printed circuit boards 11A to 11D.

  Next, another preferred embodiment will be described with reference to FIG. The printed circuit board 20 includes four printed circuit boards 10 (individual printed circuit boards 11A to 11D) shown in FIG. 1 arranged in a rotational symmetry of 90 degrees with the center 13 of the printed circuit board 20 as a center point. In this case as well, as in the configuration of FIG. 1, when the printed circuit board 20 is stored in the cartridge in the component mounting process, it is not necessary to match the directions. Therefore, working efficiency is improved and components can be mounted accurately.

Sixteen individual printed boards 11 </ b> A to 11 </ b> D are arranged for one printed board 20. That is, when a plurality of the printed circuit boards 10 of FIG. 1 are combined so as to be 90-degree rotationally symmetric with such a configuration, 4n ² (n is a natural number) individual printed circuit boards are arranged. In the configuration of FIG. 1, n = 1, and in the configuration of FIG. 2, n = 2. When the area of the printed circuit board 20 is four times that of the printed circuit board 10 in FIG. 1, the individual printed circuit board composition ratio is the same as that in FIG. On the other hand, when the width of the discarded substrate 12B on the outer periphery of the printed circuit board 20 is 10 mm, which is the same as that in FIG. The ratio can be increased.

  Next, still another preferred embodiment will be described with reference to FIG. In the printed circuit board 30, eight individual printed circuit boards 31 </ b> A to 31 </ b> H are arranged on the outer periphery of the individual printed circuit boards 11 </ b> A to 11 </ b> D so as to be 90-degree rotationally symmetric about the center 13 of the printed circuit board 30. The outer periphery of the individual printed circuit boards 11A to 11D means the outer periphery of a shape (substantially square) formed by the individual printed circuit boards 11A to 11D. The individual printed boards 31 </ b> A to 31 </ b> H may all have the same component mounting configuration, but may be the same as the separated individual printed boards, unlike the adjacent individual printed boards. That is, if at least the individual printed circuit boards 31A, 31C, 31E, and 31G have the same component mounting configuration and the individual printed circuit boards 31B, 31D, 31F, and 31H have the same component mounting structure, the rotational symmetry is 90 degrees. be able to. That is, it is only necessary that the individual printed circuit boards arranged at the positions to be moved when rotated 90 degrees have the same component mounting configuration. When the component mounting configurations of the individual printed circuit boards 31A to 31H are all the same, they may be the same as or different from the component mounting configurations of the individual printed circuit boards 11A to 11D.

  The printed circuit board 30 is arranged on the outer periphery of the individual printed circuit boards 31A to 31H so that the 12 individual printed circuit boards 32A to 32L are 90 degrees rotationally symmetric as necessary. The component mounting configurations of the individual printed circuit boards 32A to 32L may all be the same, but different from the adjacent individual printed circuit board and one separated individual printed circuit board, it may be the same as the two separated printed circuit boards. Good. That is, at least the individual printed circuit boards 32A, 32D, 32G, and 32J have the same component mounting configuration, and the individual printed circuit boards 32B, 32E, 32H, and 32K have the same component mounting structure, and the individual printed circuit boards 32C, 32F, and 32I. , 32L can be 90 degree rotationally symmetric if the component mounting configurations are the same. When the component mounting configurations of the individual printed boards 32A to 32L are all the same, they may be the same as or different from the component mounting configurations of the individual printed boards 11A to 11D and / or 31A to 31H.

  In the configuration of FIG. 3, as in the configuration of FIG. 1, when the printed circuit board 30 is stored in the cartridge in the component mounting process, it is not necessary to match the directions. Therefore, working efficiency is improved and components can be mounted accurately. When the width of the peripheral discarded substrate 12B is 10 mm as in FIG. 1, even if the number of individual printed substrates is increased, the number of discarded substrates 12A in the center does not increase. It can be increased compared to FIG.

  Next, still another preferred embodiment will be described with reference to FIG. In the printed circuit board 40, nine printed circuit boards 10 (individual printed circuit boards 11A to 11D) shown in FIG. 1 are arranged so as to be rotationally symmetrical by 90 degrees, and the individual printed circuit boards 41A to 41T are rotationally symmetrical by 90 degrees on the outer periphery thereof. It is arranged to become. Further, the individual printed circuit boards 42A to 42X are arranged on the outer periphery so as to be 90 degrees rotationally symmetric. Accordingly, as in the case of FIG. 1, the entire mounting structure of the printed circuit board 40 is the same even when rotated 90 degrees.

  Next, still another preferred embodiment will be described with reference to FIG. Unlike the printed circuit board 10 of FIG. 1, the printed circuit board 50 has individual printed circuit boards 51A to 51D having a substantially square shape. Adjacent individual printed circuit boards are arranged so as to be rotated 90 degrees around the center point of the printed circuit board 50. Accordingly, as in the case of FIG. 1, the entire printed circuit board 50 has the same mounting configuration when rotated 90 degrees.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. For example, in the configuration of FIG. 3, the individual printed boards 11 </ b> A to 11 </ b> D may not exist, and a printed board constituted only by the individual printed boards 31 </ b> A to 31 </ b> H may be used. Further, in the configuration of FIG. 3, the individual printed boards 31A and 31B may be integrated, 31C and D may be integrated, 31E and F may be integrated, and 31G and H may be integrated. In this case, the component mounting configurations of these four individual printed circuit boards are all the same.

  The present invention can be suitably applied to a printed circuit board used in various electronic devices such as an amplifier and a DVD player and a method for mounting electronic components on the printed circuit board.

1 is a schematic view showing a printed circuit board 10 according to a preferred embodiment of the present invention. It is the schematic which shows the printed circuit board 20 by another preferable embodiment of this invention. It is the schematic which shows the printed circuit board 30 by another preferable embodiment of this invention. FIG. 6 is a schematic view showing a printed circuit board 40 according to another preferred embodiment of the present invention. It is the schematic which shows the printed circuit board 50 by another preferable embodiment of this invention. It is the schematic which shows the conventional printed circuit board.

Explanation of symbols

10, 20, 30, 40, 50 Printed circuit boards 11A to 11D Individual printed circuit boards 31A to 31H, 32A to 32L Individual printed circuit boards 41A to 41T, 42A to 42X Individual printed circuit boards 51A to 51D Individual printed circuit boards

Claims (2)

A square printed circuit board including rectangular first to fourth individual printed circuit boards having a long side and a short side,
When each of the first to fourth individual printed circuit boards is arranged in a state of being rotated 90 degrees with respect to the other individual printed circuit board adjacent thereto, the printed circuit board is rotated by 90 degrees. The mounting configuration of the components of the entire printed circuit board is the same,
One short side of the first individual printed circuit board is adjacent to one long side of the second individual printed circuit board, and one long side of the first individual printed circuit board and the second individual printed circuit board One short side is in a straight line,
The other short side of the second individual printed circuit board is adjacent to one long side of the third individual printed circuit board, and the other long side of the second individual printed circuit board and the third individual printed circuit board One short side is in a straight line,
The other short side of the third individual printed circuit board is adjacent to one long side of the fourth individual printed circuit board, and the other long side of the third individual printed circuit board and the fourth individual printed circuit board One short side is in a straight line,
The other short side of the fourth individual printed circuit board is adjacent to the other long side of the first individual printed circuit board, and the other long side of the fourth individual printed circuit board and the first individual printed circuit board A printed circuit board, wherein the other short side is in a straight line.
The printed circuit board according to claim 1, wherein a plurality of individual printed circuit boards are further arranged on an outer periphery of the first to fourth individual printed circuit boards.

Images