| 摘要 |
A magnetic head comprises a lower magnetic pole, an insulating film formed on the lower magnetic pole, a coil arranged over the lower magnetic pole so as to penetrate the insulating film, and an upper magnetic pole having a pole at its top end so as to have a clearance against the lower magnetic pole and formed of magnetic material having saturation magnetic flux density Bs (T) and electric resistivity rho ( mu OMEGA cm) on the insulating film to have a film thickness delta ( mu m), and both sides of the upper magnetic pole being formed to extend from root portions of the pole at a taper angle theta (degree), whereby the upper magnetic pole can satisfy a condition of (1+tan theta ) delta Bs/ 2ROOT +E,rad rho +EE </=1.0.
|
