JPH05152710A - Surface mounting structure of printed wiring board - Google Patents

Abstract

PURPOSE:To obtain surface mounting structure of printed wiring boards wherein machine balance after surface mounting is improved although mounting balance of a printed wiring board is imperfect as a single body. CONSTITUTION:The title structure has a structure wherein the same number of the surfaces 1 and the rears 2 of printed wiring boards mixedly exist on the single surface after surface mounting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided mounting printed wiring board imposition structure.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional double-sided mounting printed wiring board has an imposition structure such that either the front surface or the back surface of the printed wiring board is aligned with one surface after the imposition. It had been.

[0003]

However, the mounting parts of the double-sided printed wiring board are mounted on the front surface and the back surface due to the restrictions on the product structure in which the printed wiring board is used and the restrictions on the wiring of the printed wiring board. There are many things that cannot balance the number of parts and types (hereinafter referred to as mounting balance).

Therefore, according to the prior art, when mounting a printed wiring board after imposition with an automatic mounting device such as a chip mounter, the mounting component 3 on the surface shown in FIG. 2A, which is a front view of FIG. 2, is mounted. The balance between the lead time of the device to be mounted and the lead time of the device to mount the backside mounting component 4 shown in FIG. 2A, which is a back view of FIG. It had the disadvantage of poor rate.

Therefore, the present invention is intended to solve such a problem, and an object of the present invention is to provide a printed wiring board in which the machine balance after imposition is improved even if the mounting balance of the printed wiring board as a single unit is poor. There is an imposition structure.

[0006]

The imposition structure of a double-sided printed wiring board according to the present invention is characterized in that the same number of front and back surfaces of the printed wiring board are mixed on one side after imposition.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings.

FIG. 1 is a plan view showing an imposition structure of a printed wiring board which is an embodiment of the present invention. 1A is a front view and FIG. 1B is a rear view. In the figure, 1 is the printed wiring board that is mounted so that the surface of the printed wiring board as a single body is the surface after imposition, and 2 is that the back surface of the printed wiring board as a single body is the surface after imposition. The imposition printed wiring board, 3 is a component mounted on the front surface of a single printed wiring board, and 4 is a component mounted on the back surface of a single printed wiring board. As for 1 and 2, the same printed wiring board is impositioned by turning it over.

As shown in FIG. 1, the number of components 3 mounted on the front surface and the number of components 4 mounted on the back surface are different from each other. Imposition is performed so that the same number of printed wiring boards 1 are arranged so that they come to the front surface and printed wiring boards 2 that are arranged so that the back surface of a single printed wiring board comes to the surface after imposition. Therefore, for example, if 1 and 2 are impositioned one by one, the components mounted on the surface after imposition will be
As shown in (a), the total number is 3 and 4. On the other hand, the components mounted on the back surface after imposition are 4 as shown in Fig. 1 (b).
And the total is 3. Since 1 and 2 are the same printed wiring board as a single unit, the mounted components on the front and back surfaces after imposition are the same number of the same number of components, so the mounting balance should be the best. You can

In this embodiment, 1 and 2 are provided one by one, but any number can be used as long as the numbers are the same.

[0011]

As described above, according to the present invention, by imposing the front and back surfaces of a double-sided mounting printed wiring board in the same number on one side after imposition, the mounting balance of a single unit is improved. Even if the printed wiring board is bad, the shape with the best mounting balance can be obtained by imposition.
This has the effects of improving the machine balance of the mounting apparatus and increasing the operating rate.

[Brief description of drawings]

FIG. 1 is a plan view showing an imposition structure of a printed wiring board that is an embodiment of the present invention.

FIG. 2 is a plan view showing a conventional printed wiring board imposition structure.

[Explanation of symbols]

1 Printed wiring board impositioned so that the front surface comes to the surface after imposition 2 Printed wiring board impositioned so that the back surface comes to the surface after imposition 3 Surface-mounted components of the printed wiring board as a single unit 4 By itself Backside mounting components for printed wiring boards

Claims (1)

[Claims] 1. In a printed wiring board imposition structure in which components can be mounted on both front and back surfaces, the same number of front and back surfaces of the printed wiring board are mixed on one side after imposition, and the surface of the printed wiring board is characterized by the same number. Attachment structure.