发明名称 |
Write head with second coil above pole having coil density less electrically connected first coil below the pole |
摘要 |
A low inductance magnetic write head is provided with first and second pole piece layers that have first ends separated by a write gap layer and second ends connected together at a back gap. An insulation stack is provided which is sandwiched between the first and second pole piece layers. A write coil layer and a second coil layer are provided wherein each coil layer has inner and outer ends. The coil layers wind in the same direction from their inner ends to their outer ends. Each of the coil layers has first and second layer portions. The first layer portion of the write coil layer is embedded in the insulation stack. The second pole piece layer is sandwiched between the first portion of the write coil and a non-magnetic layer and the first non-magnetic layer is sandwiched between the second pole piece layer and the first portion of the second coil layer. The inner ends of the coil layers are electrically connected and the outer ends of the coil layers are electrically connected to a write current source so that when the write current source is introduced write fluxes from the coil layers are in opposition. The first layer portion of the second coil layer has a turn density that is less than a turn density of the first layer portion of the write coil layer.
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申请公布号 |
US5875080(A) |
申请公布日期 |
1999.02.23 |
申请号 |
US19970924224 |
申请日期 |
1997.09.05 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
SEAGLE, DAVID JOHN |
分类号 |
G11B5/127;G11B5/17;G11B5/31;G11B5/39;(IPC1-7):G11B5/17 |
主分类号 |
G11B5/127 |
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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