JPH0785428B2 - Connection device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting device used in an input circuit portion of a tuner of a television receiver or a video tape recorder.

2. Description of the Related Art In recent years, due to advances in mounting technology, when wiring components on a substrate, a method of mounting them on the surface of the substrate using chip components and soldering them with cream solder is often adopted. In that case, for example, when it is desired to cross two conductor foils on the wiring, a method of crossing one circuit with a chip jumper is used.

Hereinafter, the conventional connecting device as described above will be described with reference to the drawings. FIG. 2 is a sectional view of a conventional connecting device. In FIG. 2, 1 is a chip jumper, 2 is a conductor foil electrically connected to the chip jumper 1, 3 is another conductor foil intersecting with the conductor foil 2, 4 is a substrate, and 5 is solder.

The configuration of the connection device configured as described above will be described below. Generally, the input circuit part from an antenna such as a tuner of a television receiver or a video tape recorder is often composed of a filter circuit. For example, in the case of a mount type in which parts such as a filter are mounted on the front surface side of a board, a foil is used. It is also necessary to perform wiring on the front surface side of the substrate. The reason is that if you bring a conductor foil for wiring on the back side of the board, you will use through holes to connect to the components on the front side of the board, but in this case, if you receive a lightning strike on the antenna input, This is because there is a problem that the through hole is cut by a lightning stroke. Furthermore, since the ground foil is often routed around the back side of the antenna input circuit board, it is difficult to route the foil on the back side of the board, so the foil for wiring is brought to the front side of the board. There was a need.

Therefore, when the wiring of the antenna input circuit and the wiring of other circuits intersect on the front surface side of the substrate, the configuration is as shown in FIG. In FIG. 2, the chip jumper 1 is used as the wiring of the antenna input circuit, and the conductor foil 3 of another circuit is inserted between the electrodes 8 below the chip jumper 1.
In this case, the reason why the chip jumper 1 is used on the antenna input circuit side is that the conductor foil width for wiring is about 2 mm in order for the conductor foil to withstand lightning strikes as described above.
The above width is required, but the conductor foil 3 that passes between the chip jumpers 1 has a width of about 0.3 mm, and the foil width against lightning stroke is insufficient.

Therefore, when crossing wires in the input circuit part, it is essential to provide a foil with a width of about 2 mm or more as a conductor foil width on the antenna input circuit side and use a chip jumper for this foil.

Problems to be Solved by the Invention However, in the above-described configuration, when a lightning strike is performed, the chip jumper itself is broken even if the conductor foil is normal, resulting in disconnection. Generally, it is necessary to withstand a high voltage of 20KV to 125KV as a test against lightning, and with conventional chip jumpers, several lightning strokes would lead to cracking and fusing.

In view of the above-mentioned problems, the present invention provides a connection device that can sufficiently withstand a lightning stroke and operates normally.

Means for Solving the Problems In order to solve the above problems, the connecting device of the present invention is configured by providing a conductor between both electrodes of a chip component and soldering the conductor between both electrodes. .

Action The present invention has the above-described configuration, and since the conductor resistance on the chip component is reduced and it can withstand a momentary large current due to a lightning strike, a connection device that is not destroyed by a lightning strike is configured.

Embodiment Hereinafter, a connection device according to an embodiment of the present invention will be described with reference to the drawings. FIGS. 1a, 1b and 1c show a connecting device according to an embodiment of the present invention. 1 a, b, c, 1 is a chip jumper, 2 is a chip jumper 1
Is a conductor foil to be connected to the other, 3 is another conductor foil, 4 is a substrate, 5 is a chip component mounting cream solder, 6 is a silver conductor, and 7 is a cream solder placed on the silver conductor 6.

The configuration of the connection device configured as described above will be described below.

1a is a cross-sectional view of the connection device, FIG. 1b is a plan view before application of cream solder, and FIG. 1c is a cross-sectional view when cream solder 5 and 7 are applied and the chip jumper 1 is mounted. is there.

As shown in the portion of the silver conductor 6 in FIG. 1b, the silver conductor 6 is metallized between the electrodes 8 of the chip jumper 1 and, as shown in FIG. 1c, the conductor foil 2 on which the chip jumper 1 is placed. If the cream solder 7 is applied on the metallization of the silver conductor 6 of the cream solder 5 for mounting chip parts and soldered by dipping or reflow soldering, the metallization of the silver conductor 6 is performed as shown in FIG. 1a. Will be solder plated.

As described above, according to this embodiment, the metal conductor 6 is metalized between the electrodes 8 of the chip jumper 1 and solder plating with the cream solder 7 is applied on the silver conductor 6, so that the conductor resistance of the chip jumper 1 is reduced. Can be lowered, and the structure will be sufficient to withstand lightning strikes.

Further, since cream solder coating can be performed by using a solder automatic coating machine or the like, there is no need for a manual soldering work later, and since it can be automated, there is no problem such as damage to the chip jumper due to manual soldering work.

As described above, according to the present invention, by providing a conductor between both electrodes of a chip component and soldering this conductor between both electrodes, it is possible to sufficiently withstand a lightning strike, and the practical The effect is great.

[Brief description of drawings]

FIG. 1a is a sectional view of a connecting device in an embodiment of the present invention, FIG. 1b is a plan view before solder application, FIG. 1c is a sectional view during cream solder application, and FIG. 2 is a conventional example. FIG. 1 ... Chip jumper, 2 ... Conductor foil to be connected to jumper, 3 ... Other conductor foil, 4 ... Board, 5 ... Cream solder for mounting chip parts, 6 ... Silver conductor, 7 ... Conductor Cream solder on top, 8 ... Electrode.

Claims (1)

[Claims] 1. A connecting device in which a chip component for a jumper is placed between conductor foils on a surface of a substrate, a conductor is provided between both electrodes of the chip component, and the conductor and the both electrodes are soldered. .