| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method, for a conductive material inside a magnetic field, in which in a process for forming a thin film of different metals on the surface of the conductive material, such as a copper foil or the like, the thickness of the thin film can be manufactured precisely, uniformly and with satisfactory reproducibility according to specifications, without the need for the skill of manufacturing operators. SOLUTION: In the manufacturing method for the conductive material inside the magnetic field, a plurality of materials whose magnetic susceptibilities are different are combined, and their apparent magnetic susceptibilities are set at zero or approximated to a magnetic susceptibility in a usage atmosphere, so that the magnetic field in the circumference is not subjected to a magnetic field strain. The manufacturing method contains a process, in which the thickness of the materials to be combined is controlled by ion sputtering method and/or ion etching method.
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