发明名称 MAGNETIC RECORDING MEDIUM, ITS MANUFACTURING METHOD, MAGNETIC SIGNAL REPRODUCING MEANS AND MAGNETIC SIGNAL REPRODUCING METHOD
摘要 PROBLEM TO BE SOLVED: To provide a magnetic recording medium which secures a data signal area to a maximum extent by dividing and recording servo signals and data signals on separate layers, and does not destroy servo signals by a control mistake at the time of disturbance or read/write, its manufacturing method, a magnetic signal reproducing means and a magnetic signal reproducing method. SOLUTION: The magnetic recording medium 1 has a substrate 2 of non-magnetic material and at least a first recording layer 5 for recording a servo signal and a second recording layer 7 for recording a data signal above this substrate 2. It is characterized in that the coercive force of the first recording layer 5 is larger than that of the second recording layer 7, and the residual magnetic flux density of the first recording layer 5 is smaller than that of the second recording layer 7. COPYRIGHT: (C)2006,JPO&NCIPI
申请公布号 JP2006018949(A) 申请公布日期 2006.01.19
申请号 JP20040197260 申请日期 2004.07.02
申请人 NIPPON HOSO KYOKAI <NHK> 发明人 MIYASHITA HIDEKAZU
分类号 G11B5/65;G11B5/012;G11B5/02;G11B5/64;G11B5/66;G11B5/667;G11B5/738;G11B5/84 主分类号 G11B5/65
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