Thin film magnetic head with an improved surface to reduce the occurrence of head crash

摘要

Disclosed is a merged head device which has: a slider main body with an air bearing surface to a magnetic medium; two magnetic shield films which are parallel disposed on a common plane with a predetermined interval and orthogonal to air flow on the downstream side of the air bearing surface of the slider main body; a magnetoresistive effect head which is disposed through a magnetic separating layer of an insulator between the two magnetic shield films; an inductive head which is composed of one magnetic pole film corresponding to one of the two magnetic shield films which is located downstream and the other magnetic pole film which is disposed through a magnetic gap on the other side of the one magnetic pole film where the magnetoresistive effect head does not exist, and recording is conducted by magnetic field which generates at the magnetic gap; and concave portions which are formed on both sides of the other magnetic pole film along the direction of the air flow on the air bearing surface of the slider main body so as to define a width of the other magnetic pole film; wherein the concave portions are filled with a non-magnetic material.