| 摘要 |
PURPOSE:To form magnetic films to desired magnetic characteristics even if the magnetic films are subjected to a heat history at the time of a head producing process and to improve the efficiency of the reading-out characteristics of the head by heat-treating the magnetic head at 200 to 350 deg.C while impressing a magnetic field of one direction to the gap depth direction thereof. CONSTITUTION:The thin-film magnetic head formed with the upper magnetic film 2 and the lower magnetic film 3 on a substrate 1 so as to face each other via a magnetic gap is heat-treated at 200 to 250 deg.C while the magnetic field of one direction is impressed to the magnetic head in the gap depth direction. This heat treatment stage is executed in at least one stage among the four stages; after the formation of the magnetic films to the cores, before the execution of the other stages, or after the formation of protective films on the magnetic cores, or in the block state cut from a wafer or after working of the slider shape to a prescribed gap depth. The magnetic permeability in the magnetic core shape is improved in such a manner and, therefore, the reproduction efficiency is enhanced. |
