发明名称 |
Perpendicular magnetic writer with magnetic potential control shield |
摘要 |
Conventional perpendicular writers that utilize an extended return pole are subject to large undershoot fields. This problem has been reduced by replacing the prior art extended return pole by one whose magnetic potential has been increased relative to both the main and return poles. In a first embodiment, a second non-magnetic gap is inserted between the extended return pole and the return pole. In a second embodiment, the extended return pole is made very thin, thereby increasing its reluctance, while a third embodiment combines both reluctance-increasing features in a single design.
|
申请公布号 |
US2004201918(A1) |
申请公布日期 |
2004.10.14 |
申请号 |
US20030411345 |
申请日期 |
2003.04.10 |
申请人 |
HEADWAY TECHNOLOGIES, INC. |
发明人 |
GUAN LIJIE;HU HUNG LIANG;TANG YAW SHING;JU KOCHAN |
分类号 |
G11B5/00;G11B5/127;G11B5/187;G11B5/23;(IPC1-7):G11B5/127 |
主分类号 |
G11B5/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|