发明授权
US08184399B2 Magnetic write head with thin and thick portions for balancing writability and ate
有权
磁性写头,薄而厚的部分,用于平衡书写和吃
- 专利标题: Magnetic write head with thin and thick portions for balancing writability and ate
- 专利标题(中): 磁性写头,薄而厚的部分,用于平衡书写和吃
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申请号: US12924416申请日: 2010-09-27
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公开(公告)号: US08184399B2公开(公告)日: 2012-05-22
- 发明人: Yan Wu , Moris Dovek , Zhigang Bai , Cherng-Chyi Han , Jiun-Ting Lee , Po-Kang Wang
- 申请人: Yan Wu , Moris Dovek , Zhigang Bai , Cherng-Chyi Han , Jiun-Ting Lee , Po-Kang Wang
- 申请人地址: US CA Milpitas
- 专利权人: Headway Technologies, Inc.
- 当前专利权人: Headway Technologies, Inc.
- 当前专利权人地址: US CA Milpitas
- 代理机构: Saile Ackerman LLC
- 代理商 Stephen B. Ackerman
- 主分类号: G11B5/127
- IPC分类号: G11B5/127
摘要:
A perpendicular magnetic recording (PMR) head is fabricated with a tapered main pole having a variable thickness. The tapered portion of the pole is at the ABS tip and it can be formed by bevels at the leading or trailing edges or both. The taper terminates to form a region with a maximum thickness, t1, which extends for a certain distance proximally. Beyond this region of maximum thickness t1, the pole is then reduced to a constant minimum thickness t2. A yoke is attached to this region of constant minimum thickness. This pole design requires less flux because of the thinner region of the pole where it attaches to the yoke, but the thicker region just before the tapered ABS provides additional flux to drive the pole just before the ABS, so that high definition and field gain is achieved, yet fringing is significantly reduced.
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