发明名称 |
Method for measuring pole width of a slider of a disk drive device |
摘要 |
A method for measuring pole width of a slider of a disk drive includes steps of: getting an original image of the pole surface; calculating the light intensity distribution profile of the original image and determining maximum and minimum light intensity data points of the profile; setting average of the maximum and minimum light intensity data points as a threshold; carrying out quadratic differentiation of the profile to obtain a quadratic differential asymptote; determining cross points between the quadratic differential asymptote and the threshold; calculating the distance between the cross points to obtain an initial pole width; and performing data compensation to the initial pole width to obtain a compensated pole width. The method may also measure the distance between edges of other micro-objects.
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申请公布号 |
US2009273855(A1) |
申请公布日期 |
2009.11.05 |
申请号 |
US20080149527 |
申请日期 |
2008.05.02 |
申请人 |
SAE MAGNETICS (H.K.) LTD. |
发明人 |
HE NA;CHENG XINJIAN;LI YU |
分类号 |
G11B27/36 |
主分类号 |
G11B27/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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