JPH04355B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a micro-electrical connection member that can be used for electrical connections in large-area panel display devices, lead-out lines from microelectrodes, and the like.

Conventional Structures and Their Problems In recent years, elastic connectors having anisotropic conductivity and rubber elasticity have been used for electrical connection from circuit boards to panel displays such as liquid crystal display devices.

However, conventionally used elastic connectors have several problems when they are actually used. That is, the conventional micro-electrical connector will be described below with reference to the drawings. FIG. 1 is a perspective view of a first conventional electrical connector, in which 1 is a conductive rubber material and 2 is an electrically insulating rubber material. It has a structure in which rubber materials 2 are alternately laminated. however,
In connectors with this structure, as the pitch between the upper and lower electrodes that need to be connected becomes smaller, the number of stacked connectors must be increased, and at the same time, the area of the connected electrodes becomes smaller as the upper and lower electrodes become misaligned due to twisting of the rubber. Moreover, when the pitch of the electrode arrangement becomes small, it becomes difficult to ensure a stable electrical connection. Also the second
As a conventional example, FIG. 2 shows an example of an anisotropic conductive connector developed for the same purpose. In this example, conductive thin wires 4 are lined up in one direction and buried in a rubber material 3 so as to avoid contact with each other. In this connector, the upper and lower electrodes are
Connections between electrodes are made using the configuration shown in the figure, where 5 is the upper and lower electrodes to be connected, and 6 is a connector. However, in an anisotropic conductive connector with such a configuration, the buried conductive thin wires are inevitably random in their mutual positional relationship, making it difficult to obtain a uniform connection between the upper and lower electrodes, and also because of the manufacturing process. There have been problems in that it is difficult to make the connector too thick because mutual entanglement occurs.

Furthermore, in addition to electrical connections to liquid crystal panels as described above, in recent years there has been a remarkable movement toward high-density packaging of electrical circuits as parts become smaller, more complex, and semiconductor parts become more highly integrated. With the trend towards higher density electrical circuits, many finer wiring processes are required, and therefore there is a strong demand for connector members that enable simple and reliable electrical connections.

Purpose of the Invention The present invention solves the above-mentioned drawbacks of the conventional example, and provides a simple and stable connection between electrodes even when the electrode pitch for interconnection is small and many electrical connections are required. The purpose of the present invention is to provide a micro-electrical connection member that enables the following.

Structure of the Invention The present invention is characterized in that the electrically conductive thin wires are oriented vertically and the electrically insulating fibers are oriented horizontally and knitted into a mesh shape. Although the vertical direction and the horizontal direction are relative and may have an opposite relationship to each other, this configuration allows reliable and stable electrical connection between electrodes arranged at a small pitch between adjacent electrodes.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention is shown in FIGS. 4 to 8. First, FIG. 4 shows a sectional view of a mesh material made of electrically conductive thin wires and electrically insulating fibers in one embodiment of the present invention, and FIG. 5 shows a perspective view thereof. In these figures, 7 is an electrically insulating fiber, and 8 is an electrically conductive metal thin wire, and the electrically insulating fiber 7 and the electrically conductive metal thin wire 8 are connected to one side by a warp thread, as shown in FIGS. 4 and 5. They are knitted together in a mesh shape, with the other being the weft, and these are fixed to each other by the knitting relationship of the weft and warp.

The functions of the micro-electrical connection member of this embodiment configured as described above will be explained below. First, a micro electrical connection member (hereinafter referred to as mesh material A) consisting of electrically conductive thin metal wires 8 and electrically insulating fibers 7 is made by arranging the thin metal wires 8 as warp threads at equal intervals. It is knitted with thin metal wires 8 as weft threads, and its production is generally done by the method of making metal mesh used in screen printing, or more generally by the same method as making cloth fabrics, and can be produced cheaply and in large quantities. I can do it. The mesh material A having such a configuration is
Since the electrically insulating fibers 7 are passed through in the horizontal direction, electrical conduction in only one direction can be obtained by the thin metal wires 8 passed in the vertical direction. Furthermore, thin metal wires 8 are passed through in the vertical direction by electrically insulating fibers 7 which are passed through in the horizontal direction.
will be fixed. Therefore, even if force is applied in the process of handling the mesh material A, the spacing between the longitudinally extending thin metal wires 8 will not shift and will always remain constant.

6 to 8 show examples of the use of this micro-electrical connector. Reference numeral 9 indicates the mesh material A, 10 a substrate, and 11 an electrode formed on the substrate 10. The arrow in Figure 6 is mesh material A.
The direction in which the thin metal wire 8 runs is shown. When the mesh material A is placed so that the thin metal wire 8 runs in the direction of the arrow, and the mesh material A is sandwiched from above and below and the upper and lower substrates 10 are crimped as shown in FIG. 7, the thin metal wire 8 comes into contact with the upper and lower electrodes. . Here, by making the spacing between the thin metal wires 8 sufficiently small and using a mesh having a pitch sufficiently smaller than the electrode pitch, the thin metal wires 8 will definitely come into contact with the electrodes 11, and no portions of contact will be lost. Moreover, since the thin metal wire 8 is woven with the wefts of the electrically insulating fibers 7, electrical conduction in the lateral direction is completely interrupted, and electrical continuity is limited to between a pair of electrodes 11 that are vertically aligned. . Further, as shown in FIG. 7, since the thin metal wire 8 is subjected to compressive force by the substrate 10 via the insulating fiber 7, the contact between the thin metal wire 8 and the electrode 11 is complete. In particular, when the insulating fiber 7 is hollow, the fiber itself has elasticity, which is more advantageous for the purpose of contact. Another example of the use of the invention is shown in FIG. This shows the case where an electrode 11 formed on a substrate 10 is connected to another electrode as a multi-wire cable using the mesh A of the present invention. In this case, the pitch of the thin metal wire 8 is adjusted to the pitch of the electrode 11 so that the tip of the thin metal wire 8 is positioned exactly on the electrode 11, and the thin metal wire 8 and the electrode 11 are connected by soldering, thermocompression bonding, or ultrasonic waves. However, if the positions of the inlets and outlets at both ends of the thin metal wire 8 of the mesh material A can be identified and the inlets and outlets correspond to each other, the thin metal wire 8
It is not necessary to match the pitch of the upper electrode 1 with the electrode pitch, and the pitch of the thin metal wire 8 is made sufficiently small.
Needless to say, if you connect it to 1, it will work in the same way. Furthermore, in this method of use, it is preferable to cover the mesh material A with insulation for the purpose of ensuring insulation in the middle of the cable.

In the above embodiment, the warp metal thin wire 8 of the mesh material A is used for the electrical connection shown in FIGS. 6 and 7.
Stainless steel wire was used as the material, and Titron fiber was used as the weft insulating fiber 7. Here, stainless steel wire has a relatively strong strength and is easy to knit into a mesh. Also, the mesh was woven with 400 mesh. When this mesh material A was used as an electrode pitch in the usage examples shown in FIGS. 6 and 7 with a line width of 100 μm and a line spacing of 50 μm, the electrical resistance between the upper and lower electrodes 11 was 0.5Ω or less for all cases. Summer. It was also confirmed that there was no electrical conduction in the lateral direction, and that the electrical conduction was completely limited to the conduction between the upper and lower electrodes 11.

The thin metal wire 8 of the mesh material A needs to be reliable under various environments, but the thin metal wire 8 may corrode under various environments and have high contact resistance. Therefore, as another usage example, we created a mesh material using gold-plated stainless steel wire. This mesh material was applied to the usage examples shown in Figures 6 and 7, and subjected to a 65°C, 95% humidity test to measure the resistance change between the upper and lower electrodes 11, but none of them reached 1Ω or more. It was confirmed that it had sufficient environmental resistance performance.

In the above embodiments, stainless steel wire or gold-plated stainless steel wire was used as the warp thread, and Tetron fiber was used as the weft thread, but the structure of the mesh material A is not limited to these. Any material may be used as long as the weft is electrically insulating and has the function of a unidirectional electrically conductive mesh material. For example, a mesh material composed of copper wire for the warp and glass fiber for the weft can be used.

Effects of the Invention As described above, since this invention is constructed by knitting electrically conductive thin wires and electrically insulating fibers into a mesh shape, the mesh material can be simply aligned in the direction and sandwiched between the electrode pads. Electrical connection is possible. Furthermore, since the electrically conductive thin wires are fixed with electrically insulating fibers, the pitch of the thin wires will not shift and stable contact can always be obtained. Furthermore, even if the electrode pitch that requires connection is small, by making the fine wire of the mesh material thin and making the pitch sufficiently small, the electrical connection can be made reliably, without any function as an electrical connector. Never. Furthermore, due to these effects, it can be widely applied not only to electrical connections to large display panels, but also to those that require electrical connections to minute electrodes, and has the effect of making electrical connections easy and reliable. . As an embodiment, the reliability is greatly improved by using gold-plated stainless steel wire as the thin wire of the mesh material.

[Brief explanation of drawings]

Figure 1 shows a first structure in which insulating layers and conductive layers are laminated alternately.
Fig. 2 is a perspective view of a second conventional example in which fine metal wires are lined up in one direction and buried in an insulating rubber member so as not to touch each other, and Fig. 3 is a perspective view of a conventional example of these connectors. 4 is a sectional view of a micro-electrical connection member according to an embodiment of the present invention; FIG. 5 is a perspective view thereof;
FIG. 6 is a plan view of the mesh material of the present invention placed on an electrode formed on a substrate, and FIG. 7 is a cross-sectional view of the mesh material in use, being held down by electrodes from above and below.
FIG. 8 is a plan view showing micro-electrical connection realized using the mesh material of the present invention as a multi-wire cable. 7... Electrically insulating fiber, 8... Electrically conductive metal thin wire.

Claims (1)

[Scope of Claims] 1. A micro electrical connection member knitted into a mesh shape with electrically conductive thin wires running vertically and electrically insulating fibers running horizontally. 2. The micro electrical connection member according to claim 1, wherein the electrically conductive thin wire is a stainless steel wire. 3. The micro electrical connection member according to claim 2, wherein the stainless steel wire is gold plated. 4. The micro-electrical connection member according to claim 1, 2 or 3, wherein the electrically insulating fiber is a Tetoron fiber.