JPS6335118B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for attaching chip components such as resistors and transistors to a flexible printed circuit board.

Generally, when miniaturizing a printed circuit board, the area occupied by the conductor pattern becomes more of a problem than the number of components, and it has been difficult to miniaturize the printed circuit board. For this reason, conventionally, double-sided substrates have been used, but depending on the circuit, it may not be possible to sufficiently reduce the area of the conductor pattern, making it difficult to downsize the substrate.

The present invention aims to eliminate the above-mentioned conventional drawbacks and is characterized in that chip parts are attached between flexible printed circuit boards (hereinafter abbreviated as "boards") that are stacked one on top of the other.

The present invention will be explained below with reference to embodiments shown in the drawings. First, as shown in FIG. 1, a U-shaped cut 3 is provided around the component mounting position 2 of the board 1. Then, an adhesive 4 is applied to the component mounting position 2, and as shown in FIG. Then, conduction is established with the conductor pattern 6. Then, as shown in FIG. 3, the part to which the chip part 5 is attached is bent. In this case, as shown in FIGS. 4 and 5, a vacuum suction cup 7 is provided on one surface so that through holes 6, 6, etc. are located around the notch 3 of the substrate 1. Place the board 1 with the chip component 5 facing down. Then, when vacuum suction is performed, the substrate 1 is pulled toward the suction cup 7, as shown in FIG. 6, and the portion to which the chip component 5 is attached is bent. After that,
As shown in FIG. 7, the other end of this chip component 5 is inserted into a through hole 9 of a substrate 8 provided overlapping the substrate 1, and soldered from the back side to be electrically connected to the conductive pattern 10. At this time, the bent end of the substrate 1 acts as a stopper to prevent the chip component 5 from being inserted into the through hole 9 too much. Also, in order to reduce the distance between the boards, the chip parts 5 may be mounted horizontally as shown in Figure 8, or the chip parts 5 may be mounted diagonally to the board 8 as shown in Figure 9. It may be installed on. Furthermore, in the above embodiment, the two flexible printed circuit boards 1 and 8 were provided on top of each other, but the 10th
As shown in the figure, one substrate 10 may be bent into a U-shape.

As described above, in the present invention, a U-shaped notch is provided in one of the flexible printed circuit boards that are stacked one on top of the other, electronic components such as capacitors are attached to this part, and this part is bent and attached to the other board. By fixing it, the area of the conductor pattern can be greatly reduced, and there is an advantage that a jumper wire becomes unnecessary. Furthermore, at this time,
Since the bent end of the board acts as a stopper against the through-hole of the other board, there is no possibility that the chip components will be inserted too far into the through-hole, making it easier to attach them to the other board. can be done extremely easily.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a board according to the present invention, FIG. 2 is a plan view when a chip component is attached to the board according to the present invention, FIG. 3 is a side view when the board is bent according to the present invention, and FIG. The figure is a perspective view of the vacuum suction cup used when bending the substrate, Figure 5 is a cross-sectional side view when placed on the vacuum suction cup, Figure 6 is a cross-sectional side view when the substrate is suctioned, and Figure 7 8 is a sectional side view of another embodiment of the present invention, FIG. 9 is a sectional side view of another embodiment, and FIG. FIG. 7 is a side view of another embodiment. 1, 8... Flexible printed circuit board, 2... Component mounting position, 3... Notch, 5... Chip component, 6... Through hole, 7... Vacuum suction cup.

Claims (1)

[Claims] 1. Make a U-shaped notch around the component mounting position of the flexible printed circuit board, attach one end of the chip component to this component mounting position, then bend the part of this board where the component is attached, and cut it at a certain distance from the board. A method for attaching a component, characterized in that the other end of the chip component is inserted and attached to a through hole in a board provided at a distance, and the bent end of the board serves as a stopper for the through hole.