| 摘要 |
PURPOSE:To provide a choke coil wherein the width of a heat treatment temperature is widened, an iron loss is small and a stable characteristic is provided in a low-permeability region. CONSTITUTION:An iron-based amorphous ribbon is wound. Thereby, a magnetic- core main body is obtained. After that, the magnetic-core main body is heat- treated in a so-called wet atmosphere whose unit steam amount in terms of 25 deg.C is 5 to 500m/m<3>. |
