发明名称 |
Magnetic writer having multiple gaps with more uniform magnetic fields across the gaps |
摘要 |
A magnetic device according to one embodiment includes a source of flux and a magnetic yoke coupled to the source of flux. The source of flux includes a thin film coil having multiple turns. The magnetic yoke has a pole with two or more gaps, wherein the coil turns have a non-uniform placement in the magnetic yoke for creating a higher magnetic field at one of the gaps than another of the gaps during writing. A magnetic device according to another embodiment includes a source of flux. A geometry of the magnetic pole near or at one of the gaps is different than a geometry of the magnetic pole near or at another of the gaps to help equalize fields formed at the gaps when the source of flux is generating flux. |
申请公布号 |
US9601134(B2) |
申请公布日期 |
2017.03.21 |
申请号 |
US201614996119 |
申请日期 |
2016.01.14 |
申请人 |
International Business Machines Corporation |
发明人 |
Biskeborn Robert G.;Herget Philipp;Webb Bucknell C. |
分类号 |
G11B5/265;G11B5/31;G11B5/23;G11B5/17;G11B5/596 |
主分类号 |
G11B5/265 |
代理机构 |
Zilka-Kotab, PC |
代理人 |
Zilka-Kotab, PC |
主权项 |
1. A magnetic device, comprising:
a source of flux comprising a thin film coil having multiple turns; and a magnetic yoke coupled to the source of flux, the magnetic yoke having a pole with two or more gaps, wherein the gaps are positioned and configured to each write an individual transition to a magnetic medium upon energization of the coil. |
地址 |
Armonk NY US |