Magnetic recording medium
AssigneeTDK Electronics Co., Ltd.
InventorKazumasa Fukuda
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Abstract
A magnetic recording medium comprising a non-magnetic substrate having fine holes in a direction of thickness and a magnetic material filled in said fine holes. The fine holes have a diameter ranging from 200 A to 5000 A and a depth ranging from 2000 A to 5 .mu.m at a ratio of depth to diameter of 1 or more.
Claims2
In a magnetic recording medium having a high density of magnetic recording including a non-magnetic substrate having fine holes in a direction of thickness and a magnetic material filled in said fine holes, an improvement wherein said fine holes have a diameter ranging from 200 Angstroms to 5000 Angstroms and a depth ranging from 2000 Angstroms to 5 microns at a ratio of depth to diameter of substantially 10.
Dependencies are inferred from the claim text.