| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a magnetic recording medium, wherein spike noise caused by a soft magnetic backing layer is suppressed to increase the signal to noise ratio (SNR) by enhancing an anisotropic magnetic field (Hk) of the backing layer without adopting a special layer constitution and without through a complicated and expensive step. SOLUTION: The manufacturing method of the magnetic recording medium includes: a step for forming the soft magnetic backing layer by sequentially layering a soft magnetic backing lower layer, a non-magnetic metal layer and a soft magnetic backing upper layer on a non-magnetic substrate; and a step for forming a perpendicular magnetic recording layer on the soft magnetic backing layer, wherein after the non-magnetic metal layer is formed, the surface thereof is exposed to a gas containing 2 to 100 at% oxygen. COPYRIGHT: (C)2008,JPO&INPIT
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