JPH0536711U - Tape wire - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a tape electric wire which increases the wiring density of conductors in the electric wire, has a low probability of causing malfunction, can improve the signal transmission speed, and is excellent in flexibility. . [Structure] A plurality of conductors 2a ..., 2b ... Are arranged along the longitudinal direction of the foamed polyolefin sheet 1 at arbitrary intervals, and both sides of the polyolefin sheet 1 are covered with the conductors 2a. Insulation tape 3,3
Was established. [Effect] Since the conductors 2 are arranged in two stages on both surfaces of the polyolefin sheet 1, the wiring density of the conductors 2 in the tape electric wire can be increased. Also, polyolefin sheet 1
Since the signal transmission speed is improved, the capacitance component newly generated between the upper and lower conductors is small, and the probability of inducing malfunction is small. Further, even if it has a two-stage structure, the flexibility of the tape electric wire does not easily deteriorate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tape electric wire used for internal wiring of electronic equipment, and more particularly to a tape electric wire having an increased wiring density of conductors in the electric wire and an improved signal transmission speed.

[0002]

[Prior Art]

 Conventionally, compact and flexible tape electric wires have been widely used for wiring between printed wiring boards of electronic devices.

In such a tape electric wire, as shown in FIG. 2, conductors 11 having a rectangular cross section are arranged in parallel at intervals, and the periphery of these conductors 11 is formed into a flexible insulator 12. Therefore, it is covered and integrated into a tape shape.

The cross section of the conductor 11 in such a tape electric wire is rectangular because the change in cross-sectional area when the tape electric wire is bent in the thickness direction is small and the change in the resistance value due to this is also small. This is because

The above-described tape electric wire is used as a shield tape electric wire in which a shield layer is formed by winding a metal wire around the outer periphery of the insulator 12 in a braided manner or by winding a metal foil.

[0006]

[Problems to be solved by the device]

 However, in recent years, along with the miniaturization of electronic devices, there has been a demand for multiple internal wiring. For this purpose, it is necessary to further reduce the pitch between the conductors 11 of the tape electric wire, but there is a problem that it is technically more difficult and disadvantageous in terms of cost.

Further, since the material 12 having a high dielectric constant such as PVC (polyvinyl chloride) or PET (polyethylene terephthalate) is used for the insulator 12 of the conventional tape electric wire, the conductor signal propagation speed becomes slow. However, there was a complaint that it was not sufficient when using digital signals from a computer or when a high transmission rate was required.

In order to solve this problem, it has been attempted to stack two tape electric wires on top of each other.

However, with this method, even if it is possible to increase the number of internal wirings, electrical coupling (crosstalk, etc.) occurs due to an increase in impedance due to a capacitance component newly generated between the upper and lower conductors. , There was a risk of causing a malfunction.

Further, as with the conventional tape electric wire, since a material having a high dielectric constant such as PVC (polyvinyl chloride) or PET (polyethylene terephthalate) is used as the insulator, the conductor signal propagation speed becomes slow. That dissatisfaction still remained. Further, when such an insulator is used, there is a problem in that the flexibility is lowered when the insulator is arranged in two steps, one above the other.

The present invention has been made in view of the above circumstances, and it is possible to increase the wiring density of conductors in an electric wire and to reduce the probability of malfunctions, improve the signal transmission speed, and increase flexibility. Also aims to provide an excellent tape wire.

[0012]

[Means for Solving the Problems]

 In the tape electric wire of the present invention, a plurality of conductors are arranged at arbitrary intervals along the longitudinal direction on both sides of the foamed polyolefin sheet, and insulating tape is provided on both sides of the polyolefin sheet so as to cover the conductors. That was the means to solve the problem.

[0013]

[Function] A plurality of conductors are arranged on both sides of the foamed polyolefin sheet along the longitudinal direction thereof at arbitrary intervals, and insulating tape is provided on both sides of the polyolefin sheet so as to cover the conductors to form a tape electric wire. When formed, since the conductors are arranged on both sides of the polyolefin sheet, the wiring density of the conductors in the tape electric wire can be increased, and the thickness of the tape electric wire can be made smaller than that in the case where the conventional tape electric wires are superposed. it can.

Further, since the polyolefin sheet having a low dielectric constant is used as the separate layer between the upper and lower conductors, the signal transmission speed is improved, and the capacitance component newly generated between the upper and lower conductors is small. The probability of triggering a malfunction is low. Furthermore, since the above-mentioned polyolefin sheet has excellent flexibility, the flexibility of the tape electric wire is unlikely to deteriorate even if it has a two-stage structure.

[0015]

【Example】

 Hereinafter, the tape wire of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the tape wire of the present invention. In this example, conductors 2a ..., 2b ... are arranged on the upper surface and the lower surface of the separate layer made of a polyolefin sheet shown by reference numeral 1 at a constant interval in parallel with the longitudinal direction of the tape, and further above and below this. Insulating tapes 3 are arranged. For the insulating tape 3, conventionally used PVC or PET can be used.

In this tape electric wire, since the conductors 2a, 2b, ... Are arranged on both surfaces of the separate layer 1, the wiring density of the conductors 2 in the tape electric wire can be increased.

Further, in this tape electric wire, since the polyolefin sheet having a low dielectric constant is used as the separate layer 1 between the conductors 2a and 2b, the signal transmission speed is improved and a new signal is generated between the conductors 2a and 2b. The capacity component is small, and the probability of inducing malfunction is small. Furthermore, since the above-mentioned polyolefin sheet is excellent in flexibility, the flexibility of the tape electric wire is unlikely to deteriorate even if it has a two-stage structure.

Therefore, this tape electric wire is effective in the case of using a digital signal of a computer or the like, or in an application requiring a high transmission speed.

[0019]

[Effect of the device]

 As described above, in the tape electric wire of the present invention, since the conductors are arranged in two stages on both sides of the polyolefin sheet, it is possible to increase the wiring density of the conductors in the tape electric wire, and to double the circuit with the same cable width as the conventional one. You can get a number. In addition, the thickness of the tape electric wire can be made thinner than that of the conventional one in which the tape electric wires are superposed.

Further, in the tape electric wire of the present invention, since the polyolefin sheet having a low dielectric constant is used as the separate layer between the upper and lower conductors, the signal transmission speed is improved, and the capacitance newly generated between the upper and lower conductors. The component is small and the probability of inducing malfunction is low.

Further, in the tape electric wire of the present invention, since the polyolefin sheet having excellent flexibility is used between the upper and lower conductors, the flexibility of the tape electric wire is not easily deteriorated even in the two-stage structure.

Therefore, the tape wire according to the present invention is effective when a digital signal is used in a computer or the like, or in applications where a high transmission speed is required.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a tape electric wire of the present invention.

FIG. 2 is a cross-sectional view showing a conventional tape electric wire.

[Explanation of symbols]

 1 separate layer 2 conductor 3 insulating layer

Claims (1)

[Scope of utility model registration request] 1. A plurality of conductors are arranged along the longitudinal direction on both sides of a foamed polyolefin sheet at arbitrary intervals, and an insulating tape is provided on both sides of the polyolefin sheet so as to cover the conductors. A tape electric wire characterized by that.