Audio/video cable
View Patent ↗An audio/video cable includes a plurality of parallel arranged insulated wires or twisted pair insulated wires each including a copper conductor and an insulation layer formed on a periphery thereof. The copper conductor includes a soft dilute copper alloy material containing pure copper, an additive element and an inevitable impurity as a balance. The soft dilute copper alloy material includes a recrystallized structure having a grain size distribution such that crystal grains in a surface layer are smaller than internal crystal grains. The surface layer includes a crystal structure such that an average crystal grain size from a surface of the surface layer up to a depth of 50 μm toward inside of the soft dilute copper alloy material is not more than 20 μm.
1. An audio/video cable, comprising:
a plurality of parallel arranged insulated wires each comprising a copper conductor for transmitting audio/video signals and an insulation layer formed on a periphery thereof,
wherein the copper conductor comprises a soft dilute copper alloy material containing pure copper, Ti as an additive element and an inevitable impurity as a balance,
wherein the soft dilute copper alloy material comprises a recrystallized structure having a grain size distribution such that crystal grains in a surface layer are smaller than internal crystal grains,
wherein the surface layer comprises a crystal structure such that an average crystal grain size from a surface of the surface layer up to a depth of 50 μm toward inside of the soft dilute copper alloy material is not more than 20 μm,
wherein the Ti in a form of one of TiO, TiO 2 , TiS, and Ti—O—S is included in a crystal grain or at a crystal grain boundary of the pure copper, and
wherein the soft dilute copper alloy material includes not less than 2 and not more than 12 mass ppm of sulfur, more than 2 mass ppm but not more than 30 mass ppm of oxygen, and not less than 4 and not more than 55 mass ppm of Ti.
2. The audio/video cable according to claim 1 , wherein the Ti includes TiO of not more than 200 nm in size, TiO 2 of not more than 1000 nm in size, TiS of not more than 200 nm in size, or a compound in a form of Ti—O—S of not more than 300 nm in size.
3. The audio/video cable according to claim 1 , wherein an electrical conductivity of the soft dilute copper alloy material is not lower than 102% IACS (International Annealed Copper Standard).
4. The audio/video cable according to claim 3 , wherein the soft dilute copper alloy material includes not less than 3 and not more than 12 mass ppm of sulfur, and not less than 4 and not more than 25 mass ppm of Ti.
5. The audio/video cable according to claim 3 , wherein the soft dilute copper alloy material has a softening temperature of not more than 148° C.
6. The audio/video cable according to claim 5 , wherein the soft dilute copper alloy material includes a dispersed particle size that is not more than 500 nm in not less than 90% of particles.
7. The audio/video cable according to claim 1 , wherein the soft dilute copper alloy material includes not less than 3 and not more than 12 mass ppm of sulfur, and not less than 4 and not more than 25 mass ppm of Ti.
8. An audio/video cable, comprising:
a plurality of twisted pair insulated wires each comprising a copper conductor for transmitting audio/video signals and an insulation layer formed on a periphery thereof; and
a jacket covering a periphery thereof,
wherein the copper conductor comprises a soft dilute copper alloy material containing pure copper, Ti as an additive element and an inevitable impurity as a balance,
wherein the soft dilute copper alloy material comprises a recrystallized structure having a grain size distribution such that crystal grains in a surface layer are smaller than internal crystal grains,
wherein the surface layer comprises a crystal structure such that an average crystal grain size from a surface of the surface layer up to a depth of 50 μm toward inside of the soft dilute copper alloy material is not more than 20 μm,
wherein the Ti in a form of one of TiO, TiO 2 , TiS, and Ti—O—S is included in a crystal grain or at a crystal grain boundary of the pure copper, and
wherein the soft dilute copper alloy material includes not less than 2 and not more than 12 mass ppm of sulfur, more than 2 mass ppm but not more than 30 mass ppm of oxygen, and not less than 4 and not more than 55 mass ppm of Ti.
9. The audio/video cable according to claim 8 , wherein the Ti includes TiO of not more than 200 nm in size, TiO 2 of not more than 1000 nm in size, TiS of not more than 200 nm in size, or a compound in a form of Ti—O—S of not more than 300 nm in size.
10. The audio/video cable according to claim 8 , wherein an electrical conductivity of the soft dilute copper alloy material is not lower than 102% IACS (International Annealed Copper Standard).
11. The audio/video cable according to claim 10 , wherein the soft dilute copper alloy material includes not less than 3 and not more than 12 mass ppm of sulfur, and not less than 4 and not more than 25 mass ppm of Ti.
12. The audio/video cable according to claim 10 , wherein the soft dilute copper alloy material has a softening temperature of not more than 148° C.
13. The audio/video cable according to claim 12 , wherein the soft dilute copper alloy material includes a dispersed particle size that is not more than 500 nm in not less than 90% of particles.
14. The audio/video cable according to claim 2 , wherein the soft dilute copper alloy material includes not less than 3 and not more than 12 mass ppm of sulfur, and not less than 4 and not more than 25 mass ppm of Ti.