| US 7,544,886 B2 | ||
| Extra-fine copper alloy wire, extra-fine copper alloy twisted wire, extra-fine insulated wire, coaxial cable, multicore cable and manufacturing method thereof | ||
| Huang Detian, Hitachi (Japan); Hiromitsu Kuroda, Hitachi (Japan); Hakaru Matsui, Hitachi (Japan); Osamu Seya, Hitachi (Japan); Ryohei Okada, Hitachi (Japan); Shinichi Masui, Takahagi (Japan); Ryuji Nakagawa, Tokaimura (Japan); and Hiroshi Okikawa, Hitachi (Japan) | ||
| Assigned to Hitachi Cable, Ltd., Tokyo (Japan) | ||
| Filed on Dec. 19, 2006, as Appl. No. 11/641,934. | ||
| Claims priority of application No. 2005-366566 (JP), filed on Dec. 20, 2005; application No. 2005-366567 (JP), filed on Dec. 20, 2005; and application No. 2005-366568 (JP), filed on Dec. 20, 2005. | ||
| Prior Publication US 2007/0187134 A1, Aug. 16, 2007 | ||
| Int. Cl. H01B 11/06 (2006.01) | ||
| U.S. Cl. 174—36 [174/28; 174/110 R; 174/113 R] | 18 Claims |
| 1. An extra-fine copper alloy wire, comprising:
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 being represented by [(1−σh1/σh0)×100%] where σh1 is a tensile strength of the wire measured after a heat treatment under conditions of a heating temperature of not more than
350° C. and a heating time of not more than 5 seconds, and σh0 is a tensile strength of the wire measured before the heat treatment.
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