JPH1041600A - Flexible wiring board fitted with terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible wiring board fitted with a terminal where the processing of the terminal is easy and the sure electric connection and fixing between the terminal and an insulating film can be made, in a flexible wiring board fitted with a terminal used for each kind of electric apparatus. SOLUTION: A second insulating film 5 is made to bite in while forming a recess 4c at the topside of a terminal 4 by pressing and heating it from above the second insulating film 5, and also the terminal 4 and the conductive pattern 2 are connected with each other by fusing the insulating resist 3 of the first insulating film 1 together to second insulating film 5. Hereby, the processing of the terminal becomes easy, and also the sure electric connection and fixing between the terminal 4 and the first insulating film 1 can be made.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible wiring board with terminals used for various electronic devices.

[0002]

2. Description of the Related Art A conventional flexible wiring board with terminals will be described with reference to FIGS.

FIG. 8 is a sectional view of a conventional flexible wiring board with terminals, and FIG. 9 is an exploded perspective view of the same.
Reference numeral 1 denotes a first insulating film in which a conductive pattern 2 is formed on an upper surface, an end 2A of the conductive pattern 2 is exposed and an insulating resist 3 is overcoated, and a metal is provided on the end 2A where the conductive pattern is exposed. A terminal 4 made of a thin plate is arranged.

[0005] Reference numeral 5 denotes a second insulating film having an adhesive 6 applied to one side thereof. The second insulating film 5 is attached to the first insulating film 1 with the terminal 4 interposed therebetween. The conductive pattern is pressed against the exposed end 2A to make an electrical connection with the conductive pattern 2, and
The terminal 4 is fixed between the two insulating films.

A plurality of protrusions 4A and recesses 4B are provided in a portion of the terminal 4 which is sandwiched between the insulating films, and the adhesive 6 of the second insulating film 5 enters the portion to play the terminal 4. Prevention of sticking and detachment is achieved.

[0006]

However, in the flexible wiring board with terminals having the above-mentioned conventional structure, the terminals 4 are fixed by the adhesive 6 of the second insulating film 5, so that the terminals 4 are prevented from rattling or coming off. In addition, there is a problem that the shape of the terminal 4 becomes complicated and processing is difficult.

SUMMARY OF THE INVENTION The present invention is to solve such a conventional problem, and has a terminal having a simple shape and easy processing, and a flexible wiring board with a terminal capable of securely connecting and fixing a terminal and an insulating film. The purpose is to provide.

[0008]

In order to solve the above-mentioned problems, a flexible wiring board with terminals according to the present invention is provided. The terminal is connected to the conductive pattern by welding an insulating resist of the first insulating film to the second insulating film while forming a concave portion in the insulating film.

According to the present invention, the processing of the terminal is facilitated, and the terminal and the insulating film can be reliably connected and fixed electrically.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a first insulating film in which a conductive pattern is formed on the upper surface, a part of the conductive pattern is exposed and an insulating resist is overcoated, A terminal made of a thin metal plate disposed on the exposed conductive pattern, and a second insulating film sandwiching the terminal together with the first insulating film, a plurality of locations around the upper surface of the terminal and around the terminal, the second The terminal and the conductive pattern are formed by inserting the second insulating film into the terminal while pressing and heating from above the insulating film to form a recess on the upper surface of the terminal and fusing the insulating resist to the second insulating film. Is a flexible wiring board with terminals to which terminals are connected. The terminal shape is simple, processing is easy, and the terminals and the insulating film are securely connected. Has the effect of pre-fixation is obtained.

According to a second aspect of the present invention, in the first aspect, a metal layer such as copper or solder is formed on the conductive pattern of the first insulating film. It has the effect of being able to improve.

According to a third aspect of the present invention, in the first or second aspect of the present invention, an adhesive is applied to a surface of the second insulating film that sandwiches the terminal, so that the insulating film and the terminal can be temporarily fixed. , Easy handling during assembly,
The workability can be improved, and the parts other than the pressurized and heated areas on the terminal top and periphery of the terminal are also fixed with the adhesive, so that the electrical connection and fixation of the terminal and the insulating film can be more reliably performed. Have.

According to a fourth aspect of the present invention, in the invention of any one of the first to third aspects, the plurality of pressurizing and heating locations on the upper surface of the terminal are end portions on both side surfaces of the terminal. This has the effect of preventing rattling, dropout and inclination more reliably.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the plurality of pressurizing and heating locations on the upper surface of the terminal are a central portion and an end portion of the terminal. This has the effect that the prevention of rattling, detachment and inclination becomes more reliable and stable.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the terminal is provided with a fold at an end on the side to be connected to the conductive pattern. Has an effect that the electrical connection between the terminal and the insulating film is particularly increased while the electrical connection between the terminal and the insulating film is increased.

According to a seventh aspect of the present invention, in the first aspect of the present invention, ultrasonic waves are used for pressurizing and heating the upper surface of the terminal and the periphery of the terminal. This has the effect that heat can be generated only at appropriate locations and that the assembling work time can be shortened.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. The same components as those described in the section of the related art are denoted by the same reference numerals, and detailed description will be omitted.

(Embodiment 1) FIG. 1 is a sectional view of a flexible wiring board with terminals according to a first embodiment of the present invention.
2 is an exploded perspective view of the same, and FIG. 3 is a partial plan view of the same. In FIG.
The terminal 4 made of a thin metal plate is disposed on the conductive pattern exposed portion 2A in the first insulating film formed with the same as in the prior art.

However, a plurality of recesses 4C are formed on the upper surface of the terminal 4 sandwiched between the first insulating film 1 and the second insulating film 5 by pressurizing and heating during assembly. The insulating film 3 of the first insulating film 1 is melted by pressurizing and heating, and is welded to the second insulating film 5.

FIG. 4 is an exploded side view of the flexible wiring board with terminals according to the present invention before assembling. The assembling method will be described with reference to FIG.

Reference numeral 7 denotes a fixed type, and between the movable type 8 disposed above, the first insulating film 1 and the terminal 4 with the conductive pattern 2 side up, and the second insulating film 5 are provided. Are arranged.

In this state, the movable die 8 descends, and the plurality of projections 8A provided on the lower surface of the movable die 8 press the upper surface and the periphery of the terminal 4 via the second insulating film 5, and the movable die 8 Is subjected to vibration by ultrasonic waves, and heat is generated in the pressurized portions of the plurality of protrusions 8A.

As a result, a concave portion 4C into which the second insulating film 5 has been formed is formed on the upper surface of the terminal 4 pressed against the plurality of protrusions 8A. 3 is melted and welded to the second insulating film 5, and a plurality of recesses 5A are formed in this welded portion.

As described above, the terminal 4 is pressed and heated from above the second insulating film 5 to insert the second insulating film 5 while forming the recess 4C on the upper surface of the terminal 4.
Is fixed, and the terminal 4 and the conductive pattern 2 are pressed and connected by welding the insulating resist 3 and the second insulating film 5, so that the shape of the terminal 4 is simple and easy to process, and the terminal 4 is easily processed. And the first insulating film 1 can be securely connected and fixed.

Further, by forming a metal layer such as copper or solder on the conductive pattern 2 of the first insulating film 1, the current capacity of the conductive pattern 2 can be improved.

Furthermore, by applying an adhesive to the surface of the second insulating film 5 that sandwiches the terminals 4, the second insulating film 5 and the terminals 4 can be temporarily fixed, so that handling during assembly becomes easy, and In addition to the above, the portion other than the pressurizing and heating portions on the upper surface of the terminal 4 and the periphery thereof is fixed by the adhesive, so that the electrical connection and the fixing between the terminal 4 and the first insulating film 1 can be more reliably performed. Become.

(Embodiment 2) FIG. 5 is a partial plan view of a flexible wiring board with terminals according to a second embodiment of the present invention. In FIG. Are provided at both side end portions of the terminal 4, so that it is possible to more reliably prevent the terminal 4 from rattling, coming off and tilting.

In FIG. 6, concave portions 4E, which are a plurality of pressurizing and heating points on the upper surface of the terminal 4, are provided at both the central portion and the end portion of the terminal 4, so that the terminal 4 can be loosened and come off. The prevention of tilt can be made more reliable and stable.

(Embodiment 3) FIG. 7 is an exploded perspective view of a flexible wiring board with terminals according to a third embodiment of the present invention. The end of is provided with a folded back 4F,
Since the pressure contact force of the terminal 4 to the conductive pattern 2 is increased by the thickness of the terminal, the electrical connection is more reliable, and the strength of detachment between the terminal 4 and the second insulating film 5 is strong.

[0030]

As described above, according to the present invention, the terminal is fixed by inserting an insulating film into the concave portion formed on the upper surface of the terminal, and the terminal and the conductive pattern are pressed by welding the insulating resist and the insulating film. Connection, so the terminal shape is simple and easy to process.
It is possible to obtain a flexible wiring board with a terminal in which electrical connection and fixing between the terminal and the insulating film are reliable.

[Brief description of the drawings]

FIG. 1 is a sectional view of a flexible wiring board with terminals according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a partial plan view of the same.

FIG. 4 is an exploded side view before the assembly.

FIG. 5 is a partial plan view of a flexible wiring board with terminals according to a second embodiment of the present invention.

FIG. 6 is a partial plan view of the same.

FIG. 7 is an exploded perspective view of a flexible wiring board with terminals according to a third embodiment of the present invention.

FIG. 8 is a cross-sectional view of a conventional flexible wiring board with terminals.

FIG. 9 is an exploded perspective view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 First insulating film 2 Conductive pattern 2A Conductive pattern exposed part 3 Insulating resist 4 Terminal 4C, 4D, 4E Concave part 4F Folding 5 Second insulating film 5A Concave part 7 Fixed type 8 Movable type 8A Projection

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Futa Matsui 1006 Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd.

Claims (7)

[Claims] 1. A first insulating film in which a conductive pattern is formed on an upper surface, a part of the conductive pattern is exposed, and an insulating resist is overcoated, and a terminal made of a thin metal plate disposed on the exposed conductive pattern. And a second insulating film sandwiching the terminal together with the first insulating film, and pressurizing and heating a plurality of locations around the upper surface of the terminal and around the terminal from above the second insulating film to form a concave portion on the upper surface of the terminal. A flexible wiring board with terminals, wherein the terminals and the conductive pattern are connected by welding the second insulating film into the second insulating film while forming the second insulating film. 2. The flexible wiring board with terminals according to claim 1, wherein a metal layer such as copper or solder is formed on the conductive pattern of the first insulating film. 3. The flexible wiring board with terminals according to claim 1, wherein an adhesive is applied to a surface of the second insulating film that sandwiches the terminals. 4. The flexible wiring board with terminals according to claim 1, wherein the plurality of pressurized and heated locations on the upper surface of the terminal are end portions on both sides of the terminal. 5. The flexible wiring board with terminals according to claim 1, wherein the plurality of pressurizing and heating locations on the upper surface of the terminal are a central portion and an end portion of the terminal. 6. The flexible wiring board with terminals according to claim 1, wherein a folded portion is provided at an end of the terminal connected to the conductive pattern. 7. The flexible wiring board with terminals according to claim 1, wherein ultrasonic waves are used for pressurizing and heating the upper surface of the terminals and the periphery.