发明名称 |
Layered return poles for magnetic write heads |
摘要 |
Methods and structures for the fabrication of both thin film longitudinal and perpendicular write heads are disclosed. A unique feature of these write heads is the inclusion of layered return poles, which comprise alternating layers of 22/78 and 80/20 NiFe alloys. The alternating layers also vary in thickness, the 22/78 NiFe layers having a nominal thickness of 1500 angstroms and the 80/20 NiFe layers having a nominal thickness of about 75 angstroms. Head efficiency and signal to noise ratios are significantly improved in heads having layered return pole construction.
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申请公布号 |
US7933096(B2) |
申请公布日期 |
2011.04.26 |
申请号 |
US20070005558 |
申请日期 |
2007.12.26 |
申请人 |
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. |
发明人 |
ALLEN DONALD G.;LAM HIEU;LAM TERENCE TIN-LOK;PUGA STEVE C. |
分类号 |
G11B5/33 |
主分类号 |
G11B5/33 |
代理机构 |
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代理人 |
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地址 |
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