JPH07147473A - Connecting auxiliary component of printed board - Google Patents

Abstract

PURPOSE:To enable a mounted component and pads, and a viahole and a lead wire to be surely connected together by a method wherein a connecting auxiliary component, which is possessed of a conductor that is larger than the pad and provided with a hole of the same shape and size with the pad inside it and an insulator fixed to the underside of the conductor, is used. CONSTITUTION:Auxiliary components 4 are interposed between a mounted component 3 and pads 2 so as to connect the mounted component 3 to the pads 2 together. The auxiliary component 4 is composed of a flat plate-like conductor 4a which is larger than the pad 2 in external shape and provided with a hole of the same shape and size with the pad 2 inside it and a flat plate-like insulator 4b which is of the same shape and size with the conductor 4a and fixed to the underside of the conductor 4a. The auxiliary component 4 is mounted on a printed board 1 making its insulator 4b come into contact with the printed board 1 and its hole positionally aligned with the pad 2, and when solder 6b is filled into the hole, the pad 2 is connected to the conductor 4a through the intermediary of the solder 6b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case where a component is mounted on a printed circuit board and an electrode of the component is connected to a circuit exposed portion of the printed circuit board or a lead wire is connected to a via hole provided in the printed circuit board. The present invention relates to auxiliary equipment for connecting printed circuit boards to be used.

[0002]

2. Description of the Related Art FIG. 5 is a diagram showing an example of a conventional state in which a component is mounted on a printed circuit board and an electrode of the component is connected to a circuit exposed portion of the printed circuit board. FIG. )
Is a perspective view. FIG. 6 is a sectional view taken along the line AA of the example of FIG.

As shown in FIGS. 5 and 6, the conventional means for mounting a component on a printed circuit board and connecting the electrode of the component to the circuit exposed portion of the printed circuit board is as follows.
A pad (or a land) 22 which is a circuit exposed portion corresponding to the shape and size of the mounting component 23 is provided on the device 1, and the electrode 23a of the mounting component 23 is directly mounted on the pad 22 to form the electrode 23a and the pad 22. Are connected by solder 26.

[0004]

In the conventional means for connecting the circuit exposed portion of the printed circuit board to the electrodes of the mounted component as described above, the position and size of the pad and the shape and shape of the mounted component are changed when the mounted component is changed. When the size does not fit,
There is a drawback that the amount of solder becomes small and sufficient connection strength cannot be obtained, or soldering cannot be performed at all.

In a multilayer printed circuit board, when a lead wire is connected to a through hole called a via hole provided to connect a signal line of one layer to a signal line of another layer, the lead wire and the via hole There is also a problem that a sufficient connection strength cannot be obtained because a sufficient amount of solder cannot be supplied between and.

[0006]

A first auxiliary accessory for connection according to the present invention has an outer shape larger than a pad provided on a printed circuit board, and has a hole having substantially the same size and shape as the pad therein. It has a flat plate-shaped conductive portion and a flat plate-shaped insulating portion having the same size and shape as the conductive portion and fixed to the lower surface of the conductive portion.

The second connecting auxiliary article of the present invention has an outer shape larger than the connecting portion of the via hole provided on the printed circuit board, and has a hole having substantially the same size as the connecting portion of the via hole therein. It has a flat plate-shaped conductive portion and a flat plate-shaped insulating portion having the same size and shape as the conductive portion and fixed to the lower surface of the conductive portion.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention, and FIG. 2 is a sectional view of the embodiment shown in FIG.

1 and 2, the printed circuit board 1
The pad 2 is provided on the. The size of the mounted component 3 is larger than that of the pad 2. Such mounting parts 3
In order to connect the pad 2 to the pad 2, an auxiliary article 4 is interposed between the mounting component 3 and the pad 2.

The auxiliary article 4 has an outer shape larger than that of the pad 2 and has a flat plate-like conductive portion 4a having a hole having substantially the same size and shape as the pad 2, and the same size and shape as the conductive portion 4a. And a flat plate-shaped insulating portion 4b adhered to the lower surface of the conductive portion 4a.

The auxiliary component 4 thus constructed is mounted on the printed board 1 with the insulating portion 4b brought into contact with the printed board 1 and the hole portions thereof aligned with the positions of the pads 2 and the solder 6b is placed in the hole. Pad 2 is filled with solder 6b
Is connected to the conductive portion 4a via. The electrode 3a of the mounting component 3 is mounted on the auxiliary article 4, and the electrode 3a and the conductive portion 4 are mounted.
When a and a are connected and fixed by the solder 6a, the electrode 3a of the mounting component 3 is connected to the pad 2 via the solder 6a, the conductive portion 4a, and the solder 6b. At this time,
The insulating portion 4b prevents a short circuit between the conductive portion 4a and another circuit exposed portion 5 provided on the printed circuit board 1.

FIG. 3 is an exploded perspective view showing a second embodiment of the present invention, and FIG. 4 is a sectional view of the embodiment shown in FIG.

3 and 4, the printed circuit board 1
1 is provided with a via hole 17. Lead wire 18
Is a line for connecting to the via hole 17.
For the auxiliary article 14, the lead wire 18 is attached to the via hole 1
When connecting to the wire 7, it is interposed between the lead wire 18 and the via hole 17 to ensure their connection.

The auxiliary article 14 has a larger outer shape than the connecting portion of the via hole 17, and has a flat plate-like conductive portion 14a having a hole having substantially the same size as the connecting portion of the via hole 17 therein. The conductive portion 14a has the same size and shape as the conductive portion 14a, and is composed of a flat plate-shaped insulating portion 14b bonded to the lower surface of the conductive portion 14a.

The hole portion of the auxiliary article 14 thus constructed is mounted on the printed circuit board 11 in alignment with the position of the connection portion of the via hole 17, and the lead wire 1 is placed on the auxiliary article 14.
When 8 is mounted and the solder 16 is filled in the hole of the via hole 17, the via hole 17 is connected to the conductive portion 14 a and the lead wire 18 via the solder 16. Conductive part 1
4a is also directly connected to the lead wire 18.

As described above, by connecting the via hole 17 and the lead wire 18 via the auxiliary article 14, the contact area between the lead wire 18 and the auxiliary article 14 is reduced.
Since it is larger than the contact area between 8 and the connection portion of the via hole 17, it is possible to make a reliable connection.

In the above first and second embodiments,
When the surface of the insulating portion is made to have adhesiveness, positioning of the auxiliary article when mounting it on the printed circuit board becomes easy. Also, by adhering the auxiliary product on the sheet by means of this adhesive insulating portion, it becomes possible to handle the auxiliary product easily.

[0019]

As described above, the auxiliary article for connecting a printed circuit board according to the present invention has a conductive portion and an insulating portion which are vertically bonded to each other, and has an outer shape larger than a connecting portion of a pad or a via hole of the printed circuit board. By providing a hole inside the pad or via hole that has almost the same shape as the connection part and contacting the insulating part with the printed circuit board and connecting the hole of the auxiliary item and the pad or via hole with solder, The effect is that the connection with the pad or the connection between the via hole and the lead wire can be surely performed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

2 is a cross-sectional view of the embodiment of FIG.

FIG. 3 is an exploded perspective view showing a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of the embodiment of FIG.

5A and 5B show an example of a conventional state in which a component is mounted on a printed circuit board and an electrode of the component is connected to a circuit exposed portion of the printed circuit board. FIG. 5A is an exploded perspective view and FIG. 5B is a perspective view. .

6 is a cross-sectional view taken along the line AA of the example of FIG.

[Explanation of symbols]

 1 ・ 11 ・ 21 Printed circuit board 2 ・ 22 Pad 3 ・ 23 Mounting component 3a ・ 23a Electrode 4 ・ 14 Auxiliary item 4a ・ 14a Conductive part 4b ・ 14b Insulation part 5 Circuit exposed part 6a ・ 6b ・ 16 ・ 26 Solder 17 Via hole 18 lead wire

Claims (2)

[Claims] 1. A flat plate-shaped conductive portion having an outer shape larger than that of a pad provided on a printed circuit board and having a hole having substantially the same size and shape as the pad therein, and the same size as the conductive portion. A supplementary article for connecting a printed circuit board, which has a shape and a flat plate-shaped insulating portion fixed to the lower surface of the conductive portion. 2. A flat plate-shaped conductive portion having an outer shape larger than a connection portion of a via hole provided on a printed circuit board and having a hole therein having substantially the same size as the connection portion of the via hole, and the conductive portion. An auxiliary article for connecting a printed circuit board, comprising: a plate-shaped insulating portion having the same size and shape as the portion and fixed to the lower surface of the conductive portion.