| 摘要 |
PURPOSE:To obtain high coercive force without reducing the thickness of a magnetic recording layer by forming inter-magnetic particle spacings which are formed as numerous gaps onto the surface of a magnetic layer as the assemblage of the magnetic particles formed on a substrate surface. CONSTITUTION:The particles 4 having the negative equil. potential with respect to the magnetic particles are stuck in a nearly uniformly dispersed state on the surface of the magnetic layer 2 as the assemblage of the magnetic particles formed on the surface of the substrate 1. This material is then immersed in an electrolyte soln. to form electrolytic corrosion holes (microholes) 3 on the surface of the magnetic layer 2 by the local galvanic effect between the particles 4 having the above-mentioned negative equil. potential and the magnetic layer 2. The respective particles 4 are isolated as the air spacings 3 are formed around the particles 4 on the magnetic layer 2 surface in the above-mentioned manner. The moving resistance of the magnetic walls, therefore, increases and the high coercive force is maintained even if the thickness of the magnetic recording layer is not so much reduced. The magnetic recording density is thereby increased and the demand for the magnetic recording of higher density with the thinner film can be met.
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