发明名称 |
Method for reducing time loss during manufacture of hard disk drives by predicting reduction in helium concentration using insitu non-repeatable runout |
摘要 |
A method is presented for reducing time loss during manufacture and testing of a hard disk drive by predicting reduction in gas fill. The method includes using servo tracking error to obtain a measured value of insitu non-repeatable runout (NRRO) for the hard disk drive, the hard disk drive having been filled with the gas and semi-sealed. The measured value of NRRO is then deconvolved into a plurality of values for flow induced NRRO components. These values of NRRO and of flow induced NRRO components are compared to predetermined limiting values and a time when one of the predetermined limiting values will be reached is predicted. Action is then applied as appropriate.
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申请公布号 |
US7212370(B1) |
申请公布日期 |
2007.05.01 |
申请号 |
US20060329745 |
申请日期 |
2006.01.10 |
申请人 |
HITACHI GLOBAL STORAGE TECHNOLOGIES AMSTERDAM B.V. |
发明人 |
FUKUSHIMA CRAIG |
分类号 |
G11B21/02 |
主分类号 |
G11B21/02 |
代理机构 |
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地址 |
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