| 摘要 |
PURPOSE:To obtain a thin film magnetic head enabled to be used at high frequency by dividing at least a part of a rear core part for forming a magnetic path by an insulating material. CONSTITUTION:An Ni-19wt% Fe alloy layer of 0.5mum thickness and an SiO2 layer of 0.1mum thickness are laminated on a non-magnetic substrate 1 consisting of a photoserum to form a lower magnetic layer 2 of 3mum thickness by a sputtering method. The lower magnetic layer 2, an upper magnetic layer 5 and a coil 3 are insulated by an insulating layer 4. The upper magnetic layer 5 is formed in the same manner as the lower magnetic layer 2 and divided by the insulating material 6 so as to have a width less than the track width. The upper and lower magnetic layers 2, 5 are connected by a connection part 7. Since the loss of eddy current is reduced by said constitution, the thin film magnetic head enabled to be used at the high frequency is obtained. |
