| 摘要 |
PROBLEM TO BE SOLVED: To make excellent running durability and high electromagnetic transducing characteristics compatible with each other in a multilayered type high density magnetic recording medium having a magnetic layer 3 having≤100 nm film thickness. SOLUTION: In the magnetic recording medium 10 of the so-called wet-on-dry system wherein a lower non-magnetic layer 2 containing inorganic particles and a binder resin and the magnetic layer 3 containing magnetic powder, a binder resin and abrasive particles are layered on a non-magnetic supporting body 1, the magnetic layer 3 has≤100 nm film thickness Z, an average particle diameter Da(nm) of the abrasive particles and the film thickness Z of the magnetic layer 3 satisfy a relation of 1.0≤Da/Z≤1.5 and the maximum particle diameter Dm(nm) of the abrasive particles and the film thickness Z(nm) of the magnetic layer 3 satisfy a relation of Dm/Z≤1.8. COPYRIGHT: (C)2007,JPO&INPIT
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