DUENNFILM-MAGNETKOPF

摘要

A thin film magnetic head comprises: lower magnetic layer, insulating layer, upper magnetic layer and a protective layer, in this order, on a substrate, and has an end face exposed to a recording medium running surface. The protective layer is comprised of 20 to 75 mole % of ZrO2 and 25 to 80 mole % of WO3 (ZrO2 being partly replaced by Y2O3, MgO, CaO and/or oxides of rare earth elements), with hardness Hv of 400 to 700 kgf/mm2 adjustable according to selection of composition and residual not more than 0.35 GPa.