| 摘要 |
<p>PURPOSE:To automate the manufacture of electromagnetic apparatuses such as current transformers or the like, to mass-produce them and to lower their costs. CONSTITUTION:The whole circumferential face of a ferrite core is covered with an insulating resin to which an electroless copper plating operation cannot be executed; an insulating resin layer 12 is formed. In succession, a resin which contains a catalyst for electroless plating use is molded on the insulating resin layer 12 so as to be a coil shape. Resin layers 13, 14 which contain a catalyst for plating use are formed. In succession, an electroless copper plating treatment is executed to them the coil-part surface of the individual resin layers 13, 14 containing the catalyst for plating use and the surface of protrusion parts 13a, 13b, 14a, 14b for terminal use are plated with copper; a coil part is formed.</p> |
