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CIRCUIT FOR EVALUATING ELECTROMAGNETIC CONVERSION CHARACTERISTIC, MAGNETIC STORAGE DEVICE, EVALUATING DEVICE, AND METHOD FOR EVALUATING ELECTROMAGNETIC CONVERSION CHARACTERISTIC
CIRCUIT FOR EVALUATING ELECTROMAGNETIC CONVERSION CHARACTERISTIC, MAGNETIC STORAGE DEVICE, EVALUATING DEVICE, AND METHOD FOR EVALUATING ELECTROMAGNETIC CONVERSION CHARACTERISTIC
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机译:用于评估电磁转换特性的电路,磁存储设备,评估设备以及用于评估电磁转换特性的方法
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摘要
PROBLEM TO BE SOLVED: To detect a minute defect in a perpendicular storage medium with high accuracy, and to evaluate characteristics.;SOLUTION: An evaluation pattern holding section 31 in a medium evaluating section 30 holds an evaluation pattern including a low frequency pattern. An evaluation pattern writing section 32 reads the evaluation pattern to be written in a magnetic disk 16. In writing the evaluation pattern on the magnetic disk 16, a writing current control section 33 converts the writing current into an excessively large or small current. An evaluation processing section 34 evaluates the defect and the characteristics of the magnetic disk 16 by using the result of reading the evaluation pattern written with the excessively large or small current.;COPYRIGHT: (C)2010,JPO&INPIT
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