发明申请
US20050013033A1 Magnetic recording disk drive with laminated media and improved media signal-to-noise ratio 失效
具有层压介质的磁记录磁盘驱动器和改进的介质信噪比

Magnetic recording disk drive with laminated media and improved media signal-to-noise ratio
摘要:
A magnetic recording disk drive has an inductive write head and a heater to record data in laminated media on the recording disk. The laminated media, with at least two ferromagnetic layers separated by a nonmagnetic spacer layer, improves SNR. Each of the ferromagnetic layers can be formed of a material having an intrinsic coercivity capable of being written by a conventional inductive write head, but because of the desired lamination to increase SNR, the ferromagnetic layer farthest from the write head is exposed to a magnetic field less than its intrinsic coercivity and thus can not be written. To write to the laminated media, heat is directed to the lower ferromagnetic layer to reduce its intrinsic coercivity below the magnetic field to which it is exposed.
信息查询
0/0