JPH0737328Y2 - Flexible printed wiring board - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a flexible printed wiring board (FP) having comb-teeth-shaped terminals when connecting a flexible printed wiring board (FPC) to a hard printed wiring board (PCB) or the like.
C).

[0002]

[Problems to be Solved by Conventional Techniques and Inventions] Conventional F
As a method of connecting the PC 12 to the PCB 11, a method of soldering 13 as shown in (a) to (d) of FIG. 4 is used. However, all of these methods are mainly manual work, and have problems in connection reliability, cost, and high density.

Recently, an FPC with a pin as shown in FIG. 5 has been proposed. This is the pin 12a on the terminal of the FPC 12.
And attach the pin 12a to the through hole 1 of the PCB 11.
1a is penetrated and soldered 13 from the back side for connection. Such an FPC can be automatically soldered, and many problems due to the conventional manual work described above are solved, but there are problems such as a space problem in the mounting portion between the FPC and the pin and a cost increase due to the mounting. There is.

[0004]

SUMMARY OF THE INVENTION The present invention provides a flexible printed wiring board having the above-mentioned connection function of the pin-attached FPC and eliminating the problems of the pin-attached FPC. A flexible printed wiring board having a terminal portion, a reinforcing layer having a conductor pattern is attached to the back surface of the base film of the comb-shaped terminal portion, and the terminal portion conductor layer and
Connect to the body pattern by conductive treatment such as plating, and
The entire surface of the part is made conductive .

[0005]

1 is a perspective view of an embodiment of a terminal portion of an FPC of the present invention. As shown in the drawing, the conductor layer 4 is integrally projected with the base film 3 in a comb shape from the FPC body 1 formed by laminating the base film 3, the conductor layer 4 and the coverlay 5 to form a comb-shaped terminal portion. 2 is formed. And
On the back surface of the base film 3 of the comb tooth-shaped terminal portion 2, the FP
A reinforcing plate 6 having a conductor pattern corresponding to the C terminal and a reinforcing layer in which a conductor layer 7 is laminated are attached by an adhesive or the like to form a terminal. Then, the terminal conductor layer 4 of the FPC and the reinforcing conductor layer 7 are connected by a conductive treatment means (8) such as plating to make the entire surface of the terminal portion conductive.

FIG. 2 is a perspective view of another embodiment of the terminal portion of the FPC of the present invention. In this embodiment, a conductor layer 7 having a conductor pattern corresponding to the terminals of the FPC is directly attached to the back surface of the base film 3 as a reinforcing layer of the terminal portion. Then, the terminal conductor layer 4 of the FPC and the reinforcing conductor layer 7 are connected by a conductive treatment means (8) such as plating,
The entire surface of the child part is made conductive.

[0007]

As described above, in the FPC of the present invention,
By attaching a reinforcing layer having a conductor pattern corresponding to the terminal conductor of the FPC to the back surface of the base film of the comb-shaped terminal portion, the same function as the pin of the conventional pinned FPC shown in FIG. 5 is ensured. You can Moreover, since the comb-teeth-shaped terminal is integrated with the conductor of the FPC main body, a connection space corresponding to the soldering of the pins of the FPC with pins is not required, so that compactness can be realized.

Further, the terminal portion conductor and the reinforcing conductor layer are connected by a conductive treatment means such as plating to make the entire surface of the terminal portion conductive.
By doing so, the reliability of the connection between FPC and PCB is improved .
It

3A and 3B are explanatory views of an example of connection between the FPC and the PCB of the present invention. Figure 3 (a)
Then, the comb-teeth-shaped terminal portion is inserted into the component soldering hole of the PCB 11 and automatic soldering is performed to complete the connection. Further, in FIG. 3B, the connection is completed by arranging the comb-teeth-shaped terminal portion on the upper surface of the terminal portion of the PCB 11 and performing automatic soldering (solder printing or reflow).

[0010]

As described above, according to the FPC of the present invention, the comb-teeth-shaped terminal portion secures the same function as the pin of the pin-attached FPC and can be easily connected to the PCB by the automatic soldering. . Moreover, since pin connection is not required and compactness can be achieved, high density connection can be realized,
The cost performance is also excellent.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a terminal portion of an FPC of the present invention.

FIG. 2 is a perspective view of another embodiment of the terminal portion of the FPC of the present invention.

3A and 3B are explanatory views of an example of connection between the FPC and the PCB of the present invention.

4A to 4D are all conventional FPCs and PCs.
It is explanatory drawing of the soldering connection method of B.

FIG. 5 is an explanatory diagram of a connection example with a PCB by a pinned FPC.

[Explanation of symbols]

1 FPC main body 2 Comb-shaped terminal part 3 Base film 4 Conductor layer 5 Coverlay 6 Reinforcement plate 7 Reinforcement conductor layer
8 Conduction processing part

Claims (1)

[Scope of utility model registration request] 1. A flexible printed wiring board having a terminal portion integrally protruding with an insulating base film in a comb shape from a flexible printed wiring board, wherein a conductor pattern is provided on the back surface of the base film of the comb-shaped terminal portion. A reinforcing layer having a layer, and the terminal conductor layer and conductor pattern are plated or otherwise conductive.
A flexible printed wiring board, characterized in that it is connected by treatment and the entire surface of the terminal portion is made conductive .