Hitachi Cable, Inc.

Hitachi Metals, Ltd.

Osamu Seya

Hakaru Matsui

Ryohei Okada

Seigi Aoyama

Takaaki Ichikawa

Koichi Tamura

Yoshinori Sunaga

Takahiro Sugiyama

Hiromitsu Kuroda

Hiroki Yasuda

Hideki Nonen

Hiroshi Okikawa

Ryuji Nakagawa

Huang Detian

Shinichi Masui

Takanobu Watanabe

Kouki Hirano

Juhyun Yu

Hiroshi Komuro

Yoshikazu Namekawa

Fumitaka Nakahigashi

Shigetoshi Goto

An optical-electric composite cable includes an optical fiber, an inner tubular cover enclosing the optical fiber, a plurality of electric wires arranged outside the inner tubular cover, a binding member collectively bundling the plurality of electric wires, and an outer tubular cover covering an outer periphery of the binding member. A gap exists between the binding member and the outer tubular cover.

Optical-electric composite cable

A multipair cable includes an inner layer part including two differential signal transmission cables for an inner layer that are twisted together, a press winding tape wound around a periphery of the inner layer part, and an outer layer part including a plurality of differential signal transmission cables for an outer layer that are wound around an outer periphery of the press winding tape. The inner layer part further includes a buffer tape disposed between the two differential signal transmission cables.

Multipair cable

A termination structure for high-speed transmission line includes a high-speed transmission line including a signal line configured to transmit a signal, an insulation which covers the signal line and an external conductor disposed at an outer periphery of the insulation, and a termination terminal disposed at a terminal of the high-speed transmission line. The termination terminal includes a holder disposed sandwiching the external conductor exposed at the terminal of the high-speed transmission line from both sides. The holder includes a holding part to hold the high-speed transmission line and is electrically connected to the external conductor. The holding part is formed so as to have a shape along an outer shape of the external conductor.

Termination structure, termination method and termination terminal for high-speed transmission line

An optical-electrical composite cable includes an optical fiber, a tubular resin inner cover to enclose the optical fiber, a plurality of electric wires disposed on an outside of the inner cover, and a tubular outer cover to collectively cover the plurality of electric wires. The plurality of electric wires are helically wound around an outer peripheral surface of the inner cover so as to be situated between the inner cover and the outer cover.

Optical-electrical composite cable

An extra-fine copper alloy twisted wire including a plurality of copper alloy wires with a wire diameter of 0.010 to 0.025 mm twisted together, each of the copper alloy wires including 1 to 3 weight % of silver (Ag) and a balance consisting of a copper and an inevitable impurity, the copper alloy twisted wire further including a tensile strength of not less than 850 MPa, and an electrical conductivity of not less than 85% IACS. The extra-fine copper alloy twisted wire includes a solid insulation with a thickness of not more than 0.07 mm formed on an outer circumference of the extra-fine insulated wire.

Extra-fine copper alloy wire, extra-fine copper alloy twisted wire, extra-fine insulated wire, coaxial cable, multicore cable and manufacturing method thereof

An extra-fine copper alloy wire has: a wire diameter of 0.010 to 0.025 mm; 1 to 3 weight % of silver (Ag), and a balance consisting copper (Co) and an inevitable impurity; a tensile strength of not less than 850 MPa; an electrical conductivity of not less than 85% IACS; an elongation of 0.5 to 3.0%; and a lowering rate in tensile strength of not more than 2%. The lowering rate is represented by [(1&#x2212;&#x3c3;/&#x3c3;)&#xd7;100%] where &#x3c3;is a tensile strength of the wire measured after a heat treatment under conditions of a heating temperature of not more than 350&#xb0; C. and a heating time of not more than 5 seconds, and &#x3c3;is a tensile strength of the wire measured before the heat treatment.

A process for forming an ultrafine copper alloy wire is provided. The alloy includes a copper matrix of high purity copper having a total unavoidable impurity content of not more than 10 mass ppm. The matrix contains 0.05 to 0.9 mass % of at least one metallic element of the group of tin, indium, silver, antimony, magnesium, aluminum, and boron. The alloy is melted in a carbon crucible. The molten alloy is cast into a wire rod utilizing a carbon mold. The wire rod is then subjected to a primary wire drawing, an annealing, and a secondary wire drawing. The produced ultrafine copper alloy wire has excellent tensile strength, electrical conductivity, and drawability.

Process for forming an ultrafine copper alloy wire

This invention provides a composite conductor having excellent strength, flexing resistance and corrosion resistance, a production method thereof and a cable employing the same composite conductor. A corrosion resistant layer is formed of Au, Ag, Sn, Ni, solder, Zn, Pd, Sn&mdash;Ni alloy, Ni&mdash;Co alloy, Ni&mdash;P alloy, Ni&mdash;Co&mdash;P alloy, Cu&mdash;Zn alloy, Sn&mdash;Bi alloy, Sn&mdash;Ag&mdash;cu alloy, Sn&mdash;Cu alloy or Sn&mdash;Zn alloy in the thickness of 0.5 &mgr;m or more on an external periphery of a core made of copper-metal fiber conductor. A wire material made of the copper-metal fiber conductor is subjected to area reduction processing. In the middle of the area reduction processing or after the area reduction processing is completed, corrosion resistant layer is formed on the periphery of the wire material in the thickness of 0.5 &mgr;m or more by plating with Au, Ag, Sn, Ni, solder, Zn, Pd, Sn&mdash;Ni alloy, Ni&mdash;Co alloy, Ni&mdash;P alloy, Ni&mdash;Co&mdash;P alloy, Cu&mdash;Zn alloy, Sn&mdash;Bi alloy, Sn&mdash;Ag&mdash;Cu alloy, Sn&mdash;Cu alloy or Sn&mdash;Zn alloy.

Composite conductor, production method thereof and cable using the same

In an extrafine or ultrafine copper alloy wire having an outer diameter of not more than 0.1 mm, the copper alloy wire is formed of a heat treated copper alloy comprising 0.05 to 0.9% by weight in total of at least one metallic element selected from the group consisting of tin, indium, silver, antimony, magnesium, aluminum, and boron and not more than 50 ppm of oxygen with the balance consisting of copper. By virtue of this constitution, the extrafine or ultrafine copper alloy wire has a combination of excellent bending fatigue lifetime based on high tensile strength and excellent torsional strength based on high elongation or a combination of excellent tensile strength, electrical conductivity, and drawability and good elongation. The invention has been described in detail with particular reference to preferred embodiments, but it will be understood that variations and modifications can be effected within the scope of the invention as set forth in the appended claims.

Extrafine copper alloy wire, ultrafine copper alloy wire, and process for producing the same

An ultrafine copper alloy wire drawn to a diameter of not more than 0.08 mm is provided which is formed of an alloy having a copper matrix of high purity copper with a total unavoidable impurity content of not more than 10 mass ppm. Contained in the matrix is 0.05 to 0.9 mass % of at least one metallic element selected from the group including tin, indium, silver, antimony, magnesium, aluminum, and boron. By virtue of this constitution, the ultrafine copper alloy wire has excellent tensile strength, electrical conductivity, and drawability.

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Hitachi, Japan

Osamu Seya