专利名称：DETERMINATION OF THE QUALITY OF AN
ERASE PROCESS FOR PERPENDICULARMAGNETIC RECORDING DISKS
发明人：Shanlin Duan,Zhupei Shi,Jane Jie
Zhang,Kezhao Zhang
申请号：US12266950申请日：20081107
公开号：US20100118423A1公开日：20100513
专利附图：
摘要：Methods and test systems are disclosed for determining the quality of an erase
process for perpendicular magnetic recording (PMR) disks. After performing an eraseprocess on a PMR disk and before the PMR disk is assembled into a hard disk drive, a firsttest pattern of magnetization pulses is written to a region of the PMR disk. A second testpattern is subsequently read from the region of the PMR disk. The second pattern ofmagnetization pulses is analyzed in relation to the first test pattern and measured todetermine the quality of the erase process.
申请人：Shanlin Duan,Zhupei Shi,Jane Jie Zhang,Kezhao Zhang
地址：Fremont CA US,San Jose CA US,San Jose CA US,Fremont CA US
国籍：US,US,US,US
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