JPH06163101A - Connection member and manufacture thereof - Google Patents

Abstract

PURPOSE:To easily peel a protective sheet by forming a connection member without forming paste plastic resin on the periphery of a flexible substrate. CONSTITUTION:A heat seal 21 consisting of conductive wire 23 and paste plastic resin 24 is disposed on an insulating flexible substrate 23. By attaching a protective sheet 25 to the seal 21, a group of connection suitably, a connection member 26 is obtained. In this case, the resin 24 is not formed in the peripheral region of the substrate 23. Accordingly, the cutting in preparation is easy and certain and peeling off of the sheet 5 is easy, and the quantity of resin used is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting member for electrically connecting a liquid crystal display panel and a drive circuit, and a method for manufacturing the same, and more specifically, it has a function as a wiring board and an adhesive, The present invention relates to a connecting member called a seal and the like and a method for manufacturing the same.

[0002]

2. Description of the Related Art For example, as a connecting member for electrically connecting a liquid crystal display panel and a printed wiring board, a connecting member called a heat seal connector, which has both functions of a wiring board and an adhesive, is widely used. ing.

FIG. 6 is a sectional view showing a schematic structure of a conventional connecting member 6. The heat seal 1 is composed of a flexible substrate 2, wiring 3 and a paste-like thermoplastic resin film 4. The wiring 3 is formed by applying a conductive coating material on one surface of the flexible substrate 2 formed of an insulating synthetic resin or the like. Pasty thermoplastic resin film 4
Is insulative and is formed by coating so as to cover the entire one surface of the flexible substrate 2 on which the wiring 3 is formed. The pasty thermoplastic resin film 4 exhibits a strong adhesive force when heat and pressure are applied, but has a weak adhesive property even at room temperature and normal pressure. Therefore, in order to prevent foreign matter from adhering to the pasty thermoplastic resin film 4,
A protective sheet 5 made of an insulating material is attached onto the paste-like thermoplastic resin film 4 to form a connecting member 6.

FIG. 7 is a process chart for explaining a process for manufacturing the connecting member 6. In step a1, the flexible substrate 2 is set on a workbench, and in step a2, a conductive coating material is applied to one surface of the flexible substrate 2,
The wiring 3 is formed. At that time, for the purpose of increasing productivity,
The wirings 3 for a plurality of the connecting members 6 are printed and formed on one surface of the flexible substrate 2 at one time. That is, as shown in FIG. 8, the wiring 3 for the plurality of the connecting members 6 (four in the case of FIG. 8) is formed on one substrate 2.

In step a3, the substrate 2 shown in FIG. 8 is dried, and in step a4, a paste-like thermoplastic resin is applied to the entire surface of the substrate 2 shown in FIG. Then, the heat seal member 7 is formed. In step a5, the heat seal member 7 is dried. In step a6, the protective sheet 5 is adhered onto the paste-like thermoplastic resin film 4 to form a connecting member group. In step a7, the outer shape of each connecting member included in the connecting member group is processed, and the connecting member 6 is processed as a single piece.

FIG. 9 is a side view showing the state of the connecting member during the processing of a single product in step a7. The connecting member group 8 set on the workbench 9 is subjected to outer shape processing by a cutting means 10 such as a Thomson die blade, and the connecting member 6 is individually processed.

[0007]

As described above, the paste-like thermoplastic resin film 4 having an insulating property is formed on the entire surface of the substrate 2 on which the wiring 3 is formed. Therefore, as shown in FIG. 9, in the step of externally processing the connecting member group 8 by the cutting means 10, the cutting means 1
The paste-like thermoplastic resin adheres to No. 0.

Due to the adhesion of the pasty thermoplastic resin, the cutting ability of the cutting means 10 is significantly reduced. Therefore, in order to maintain the cutting ability of the cutting means 10, the cutting means 10 must be frequently cleaned, and the connecting member 6
There is a problem that the efficiency of the productivity of the is significantly reduced.

Further, as shown in FIG. 9, in the connecting member 6 formed by externally processing the connecting member group 8, as shown in FIG. 6, the paste-like thermoplastic resin is used as the protective sheet. 5 and the cut surface of the substrate 2 are also attached. Therefore, the releasability of the protective sheet 5 from the heat seal 1 is deteriorated, and the efficiency of the attachment work of the heat seal 1 is reduced.

In order to facilitate the peeling of the protective sheet 5 from the heat seal 1, a slit may be provided at the end of the connecting member 6. In such a case, when the protective sheet 5 is peeled from the heat seal 1, since the paste-like thermoplastic resin is attached to each cut surface of the protective sheet 5 and the substrate 2 as described above, 2 follows the protective sheet 5. At that time, a crack is generated from a slit provided in the substrate 2, and the crack causes a problem that the wiring 3 formed on one surface of the substrate 2 is disconnected.

An object of the present invention is to provide a connecting member which can easily peel off the protective sheet and a method for manufacturing the connecting member.

[0012]

According to the present invention, there is provided a flexible substrate made of an insulating material, and one surface of the flexible substrate in a wiring region set at a distance from an outer periphery, An insulating paste-like thermoplastic resin that is formed by covering the wiring in a coating area that is formed by a wiring formed of a conductive material and the wiring area and is set with an interval from the outer periphery. A connection member comprising a film and a protective sheet made of an insulating material and attached to the surface of the thermoplastic resin film.

Further, according to the present invention, wiring is formed of a conductive material in a plurality of wiring regions set at intervals on one surface of a flexible substrate made of an insulating material,
In a coating region including the wiring region, a paste-like thermoplastic resin having an insulating property is coated, a protective sheet made of an insulating material is attached to a thermoplastic resin surface, and at a position where the thermoplastic resin is not coated, A method of manufacturing a connecting member is characterized in that the flexible substrate and the protective sheet are cut by a cutting means.

[0014]

According to the present invention, the wiring and the thermoplastic resin film covering the wiring are formed on one surface of the flexible substrate, and the protective sheet is attached to the surface of the thermoplastic resin film to form the connecting member. It is formed. This connecting member has no paste-like thermoplastic resin film formed on one surface of the flexible substrate and in an area other than the application area which is set at a distance from the outer periphery. That is, the thermoplastic resin film is not formed on the periphery of the insulating synthetic resin sheet.

Therefore, the amount of the thermoplastic resin used can be reduced as compared with the conventional one. Furthermore, since the thermoplastic resin film is not formed on the periphery of the flexible substrate, the protective sheet can be easily peeled off from the flexible substrate.

Further, according to the present invention, the paste-like thermoplastic resin is applied only to a plurality of application regions which are set on one surface of the flexible substrate and are spaced from each other. As a result, the amount of the thermoplastic resin used can be reduced.

Further, in a process of manufacturing a connecting member which is formed by pasting a protective sheet on the flexible substrate and cutting by a cutting means at a position where the thermoplastic resin is not applied, the thermoplastic resin is applied to the cutting means. Can be prevented from adhering. This eliminates the need for frequent cleaning of the cutting means.

Further, since the thermoplastic resin is not applied to the peripheral portion of the connecting member, it does not adhere to the cut surface. Therefore, the protective sheet can be easily peeled from the connecting member.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a connection member 2 which is an embodiment of the present invention.
It is sectional drawing which shows the schematic structure of 6. Heat seal 2
1 comprises a flexible substrate 22, wiring 23, and a thermoplastic resin film 24 in a paste form. On one surface of the flexible substrate 22, which is formed of an insulating synthetic resin such as polyester, in a sheet shape, a conductive coating material is applied to a wiring region set at a distance from the outer periphery of the substrate 22. Wiring 2
3 is formed. The paste-like thermoplastic resin film 24 having an insulating property is formed by coating the coating region in the coating region including the wiring region and spaced from the outer periphery of the substrate 22. The pasty thermoplastic resin film 24 exhibits a strong adhesive force when heat and pressure are applied, but has a weak adhesive property even at room temperature and normal pressure. Therefore, for the purpose of preventing foreign matter from adhering to the paste-like thermoplastic resin film 24, a protective sheet 25 made of an insulating material such as paper is used.
Affixed to the pasty thermoplastic resin film 24,
The connection member 26 is formed. The substrate 22 and the protective sheet 25 are formed larger than the application area. Therefore, the thermoplastic resin film 24 is not formed on the peripheral portion.

2A to 2D are process drawings for explaining the process of manufacturing the connecting member 26. In step b1, a conductive coating material is applied to a predetermined wiring region on one surface of the substrate 22 to form the wiring 23. At this time, for the purpose of increasing productivity, a plurality of wirings 23 for the connecting members 26 are formed by printing on one surface of the substrate 22 at one time. That is, as shown in FIG.
A plurality of wiring regions (regions surrounded by a chain double-dashed line A) and wirings 23 corresponding to a plurality of the connecting members 26 (four in the case of FIG. 3).

In step b3, the substrate 22 shown in FIG. 3 is dried, and in step b4, a paste-like thermoplastic resin is applied onto the surface of the substrate 22 shown in FIG. At this time, a paste-like thermoplastic resin is applied at least in the area indicated by the chain double-dashed line A to form the film 24 and the heat seal member 27. In step b5, the heat seal member 27 is dried.

In step b6, the protective sheet 25 is attached to the pasty thermoplastic resin film 24 to form a connecting member group. In step b7, the outer shape of each connecting member included in the connecting member group is processed, and the connecting member 26 is individually processed.

FIG. 4 is an enlarged plan view of the wiring 23 formed on one surface of the heat seal member 27.
FIG. 5 is a side view showing a state of the connecting member group 28 during outer shape processing in step b7. The connecting member group 28 set on the work table 29 is subjected to outer shape processing by a cutting means 30 such as a Thomson die blade. The cutting means 30 is adjusted to cut along the two-dot chain line B shown in FIG.

Reference numeral X indicates the distance between the two-dot chain line A and the two-dot chain line B, and is set to 0.35 mm in this embodiment. The interval X is selected as the maximum tolerance value which is the sum of the accuracy tolerance value of the pasty thermoplastic resin printing machine and the cutting accuracy tolerance value of the cutting means 30. Therefore, the interval X is also changed according to the accuracy of the pasty thermoplastic resin printing device and the cutting accuracy of the cutting means 30.

In the connecting member group 28 to be externally machined, the thermoplastic resin is not applied to the region shown by the chain double-dashed line B except the region shown by the chain double-dashed line A. Therefore, when the connecting member 26 is processed as a single piece, the thermoplastic resin does not adhere to the cutting means 30. As a result, it is not necessary to frequently perform the cleaning work of the cutting means 30, and the production efficiency of the connecting member can be improved.

When the thermoplastic resin is applied onto the substrate 22, the thickness of the thermoplastic resin becomes uneven. Therefore, the cutting pressure condition of the cutting means 30 must be adjusted each time. However, according to the present invention, the thermoplastic resin is not applied to the cutting site by the cutting means 30 as described above, and therefore the cutting means 30 performs the cutting operation under a constant cutting pressure condition. Is possible,
The production efficiency of the connecting member 26 can be improved.

According to the present invention, as shown in FIG.
The thermoplastic resin film 24 is not formed in the region shown by the chain double-dashed line B except the region shown by the chain double-dashed line A. This makes it possible to prevent the substrate 22 from following the protective sheet 25 when the protective sheet 25 is peeled off, and the substrate 22 is easily peeled off. Therefore, it is possible to improve the work efficiency of attaching the heat seal 21.

In order to facilitate the peeling work of the protective sheet 25, a slit may be provided at the end of the connecting member 26. Even in such a case, the connecting member 26
In the above, it is possible to prevent the substrate 22 from following the protection sheet 25. Therefore, a crack is generated from the slit provided on the substrate 22, and the wiring 23 formed on one surface of the substrate 22 is caused by the crack.
However, the problem of disconnection can be solved.

[0029]

As described above, according to the present invention, since the pasty thermoplastic resin film is not formed on the peripheral portion of the flexible substrate, the amount of the thermoplastic resin used is smaller than that of the conventional one. The number of sheets can be reduced and the protective sheet can be easily peeled off. As a result, it becomes possible to supply inexpensive and stable quality connecting members to the market.

Further, according to the present invention, since the paste-like thermoplastic resin is applied only to a plurality of application areas set on one surface of the flexible substrate at intervals, the thermoplastic resin is The amount of resin used can be reduced and the manufacturing cost can be reduced.

Further, since the cutting means cuts at a position where the thermoplastic resin is not applied, the thermoplastic resin does not adhere to the cutting means, and it is not necessary to clean the cutting means frequently.

Further, from the connecting member to the protective sheet,
It can be easily peeled off and the work efficiency can be improved. Therefore, it is possible to supply a cheap and good-quality connecting member to the market.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a connecting member 26 that is an embodiment of the present invention.

2A to 2C are process diagrams illustrating a manufacturing process of a connecting member 26.

FIG. 3 is a plan view of a heat seal member 27.

FIG. 4 is an enlarged plan view of a heat seal member 27.

FIG. 5 is a side view showing a state of the connecting member group 28 during outer shape processing.

FIG. 6 is a cross-sectional view of a connection member 6 which is a conventional example.

7A to 7C are process diagrams illustrating a manufacturing process of the connecting member 6.

8 is a plan view of the heat seal member 7. FIG.

FIG. 9 is a side view showing a state of the connecting member group 8 during outer shape processing.

[Explanation of symbols]

 21 heat seal 22 flexible substrate 23 wiring 24 paste-like thermoplastic resin film 25 protective sheet 26 connection member

Claims (2)

[Claims] 1. A flexible substrate made of an insulating material, and a wiring formed of a conductive material in a wiring region which is formed on one surface of the flexible substrate and is spaced from the outer periphery. And an insulating paste-like thermoplastic resin film formed to cover the wiring in a coating area that is set at a distance from the outer periphery in a region including the wiring region, and an insulating material. And a protective sheet attached to the surface of the thermoplastic resin film. 2. A flexible substrate made of an insulating material, wherein a wiring is formed of a conductive material in a plurality of wiring regions set at intervals on one surface of the flexible substrate, and coating including the wiring region. The area is coated with a paste-like thermoplastic resin having an insulating property, a protective sheet made of an insulating material is attached to the surface of the thermoplastic resin, and the flexible substrate and the flexible substrate are provided at a position where the thermoplastic resin is not coated. A method of manufacturing a connecting member, which comprises cutting the protective sheet by a cutting means.