Thin film inductive transducer with alumina gap positioned over coils

摘要

A thin film inductive transducer is described for recording magnetic transitions on a track of a moving magnetic recording medium. The transducer includes a first layer of a magnetic material deposited on a substrate in two stages to provide a deposit of reduced thickness in a pole tip region adjacent one end of what will become a yoke structure. An insulating material is deposited on the first layer. A conductor coil having generally helical turns is deposited on the insulating layer. A non-magnetic material is deposited on the conductor coil. An insulating material is deposited over the non-magnetic material. A second layer of magnetic material is deposited over the last mentioned insulating material and cooperates with the first layer to form the yoke structure in which the layers straddle and are insulated from the coil. The first and second layers are separated at the pole tip region by the non-magnetic material to form a magnetic gap. Preferably, the non-magnetic material is aluminum oxide.