| 摘要 |
A magnetic head and production method with excellent productivity with which a surface with fine irregularities is formed only on the bearing surface of the sliding member facing the magnetic recording medium to form a fine air flow path without changing the properties of the smooth surface of the core member that has been finish polished. The sliding properties and the magnetic properties can be improved with no damage to the magnetic recording medium by this surface with fine irregularities. By the present invention, fine irregularities are formed in the bearing surface of the sliding member and the tips of each protrusion in the surface with fine irregularities are almost flat without any change whatsoever in the properties of the smooth surface of the core member, which has been finish polished until the lapping residue layer was removed, by chemical etching using an etching solution made from a an aqueous solution including oxidizer, acid and alkali after the magnetic head has been assembled and the sliding surface of a core material and sliding member that face the magnetic recording medium have been polished to an average surface roughness Ra of, for instance, 2.0 nm or less, and as a result, the flow of air between the sliding member and the recording medium during sliding can be improved.
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