| 摘要 |
PURPOSE:To obtain a small-sized and high-performance inductor or an LC composite component by a method wherein this kind of component is formed by using a copper wire whose surface has been covered with a ferrite-plated film. CONSTITUTION:A copper wire 4 whose surface has been oxidized so that Fe<2+> ions and other heavy metal ions can be easily absorbed is immersed in a reaction solution containing the Fe<2+> ions and other heavy metal ions; the Fe<2+> ions and other heavy metal ions which have been absorbed on the surface of the copper wire 4 by an oxidizing agent or an anodic oxidation process are oxidized; then, a ferrite thin film 3 is formed on the surface of the copper wire 4. When an electric current flows through this copper wire, this ferrite thin film prevents a circular magnetic field generated around the copper wire from leaking to the outside from a space between windings; an inductance and a Q characteristic are enhanced. By this setup, it is possible to design a component with a coil characteristic of a wide extent and to realize a small- sized and high-performance coil component.
|
