| 摘要 |
PURPOSE:To improve recording efficiency by integrally forming the energizing coils made by alternately and spirally laminating insulation layers and conductive layers to the leading end of an auxiliary magnetic pole to the circumferential surface of the auxiliary magnetic pole. CONSTITUTION:Insulation layer 11 consisting of silicon oxide or alumina and conductive layers 12 consisting of gold or silver are alternately and spirally laminated on the leading end part of an auxiliary magnetic pole, whereby an energizing coil 13 is constituted. With such constitution, the winding density of the conductive layers 12 is made sufficiently high and the diameters thereof is made sufficiently small, hence the current density per equivalent unit volume is made sufficiently high. In addition, since the winding density thereof is uniformalized, the stable magnetic fluxes of characteristics are concentrated at the leading end of the auxiliary magnetic pole 4. Hence, the recording efficiency is considerably improved. |
