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US07773333B2 Recording data simultaneously at two depths of a tilted magnetic medium 失效
在倾斜磁介质的两个深度同时记录数据

Recording data simultaneously at two depths of a tilted magnetic medium
Abstract:
Methods and recording systems are configured for recording different data simultaneously at two different depths of a tilted magnetic medium, the tilted magnetic medium having a hard axis of magnetization, the axis being out of a plane of the medium and at an angle of −10 to −80 degrees with respect to a direction along which data are recorded, the medium being capable of having two depths of recording. A method embodies writing with selected magnetic fields whose amplitudes and whose angles with respect to the medium hard axis direction differ at the two depths of the medium such that the recorded direction of magnetization at the respective two depths can be set independently.
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