Invention Grant
- Patent Title: Perpendicular recording head with reduced thermal protrusion
- Patent Title (中): 垂直记录头具有减少的热突起
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Application No.: US11274853Application Date: 2005-11-14
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Publication No.: US07679862B2Publication Date: 2010-03-16
- Inventor: Kazuhiro Nakamoto , Kimitoshi Etoh , Masayuki Kurita
- Applicant: Kazuhiro Nakamoto , Kimitoshi Etoh , Masayuki Kurita
- Applicant Address: NL Amsterdam
- Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agency: Townsend and Townsend and Crew LLP
- Agent Rambod Nader
- Priority: JP2004-329525 20041112
- Main IPC: G11B5/127
- IPC: G11B5/127

Abstract:
Embodiments of the invention secure a sufficiently large magnetic field, and deter a protrusion phenomenon of a perpendicular magnetic recording head, causing a problem in implementing a low flying height, while solving problems such as erasure of information in peripheral tracks. In one embodiment, a main pole or a stacked body made up of the main pole, and an auxiliary pole is deposited over an underlayer formed on a substrate so as to be in contact with the underlayer. On top of the main pole or the stacked body, there is deposited a coil, a return pole, and a read element in that order, thereby fabricating a perpendicular magnetic recording head. Further, an additional structure may be added such that an underlayer containing a metal is disposed between the substrate, and the main pole or the stacked body made up of the main pole, and the auxiliary pole, and a heat diffusion layer is disposed between portions of the coil and the substrate, or portions of the coil is disposed closer to the substrate than other portions of the coil.
Public/Granted literature
- US20060103982A1 Perpendicular recording head with reduced thermal protrusion Public/Granted day:2006-05-18
Information query
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