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公开(公告)号：US12106783B2
公开(公告)日：2024-10-01
申请号：US18348073
申请日：2023-07-06
发明人： Da Yao He , Rong Huang , Hua Li , Jian Hui Huang , Peng Liu
CPC分类号： G11B5/255 , G11B5/3106 , G11B5/40 , G11B2005/0021 , G11B2005/0024 , G11B5/4826
摘要： The present disclosure discloses a device with a protective layer, including a substrate, a seed layer formed on the substrate, and a diamond-like carbon layer formed on the seed layer, where the seed layer is a silicon nitride layer, and a content of nitrogen in the silicon nitride layer is 9%-17%. The present disclosure further discloses a microwave-assisted magnetic recording (MAMR) head slider, a head gimbal assembly, and a disk drive unit. The device has good thermal stability, oxidation resistance and corrosion resistance, thereby improving reliability and prolonging service life of an MAMR head.
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公开(公告)号：US11605397B2
公开(公告)日：2023-03-14
申请号：US17349698
申请日：2021-06-16
摘要： Aspects of the present disclosure provide various magnetic recording slider structures and fabrication methods that can reduce head overcoat (HOC) thickness without significantly reducing the lifetime and reliability of a slider by using a protective cap placed on preselected locations on the outermost surface or HOC of the slider. A slider includes a writer comprising an energy-assisted recording element. The writer is configured to store information on a magnetic medium using the energy-assisted recording element. The slider includes a head overcoat (HOC) layer providing an outermost media facing surface. The slider further includes a protective cap positioned on the HOC layer to at least partially cover the energy-assisted recording element, the protective cap including a preselected shape configured to protect the energy-assisted recording element.
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公开(公告)号：US11348603B2
公开(公告)日：2022-05-31
申请号：US17375681
申请日：2021-07-14
发明人： Amy Jo Bergerud , Iris Cheng Xiong
摘要： A slider comprises an air bearing surface having a leading edge at a first end of the air bearing surface; a trailing edge at a second end of the air bearing surface, wherein the first end is opposite to the second end; a first region adjacent to the trailing edge, wherein the first region comprises one or more transducer elements; and a second region adjacent to the first region and the leading edge. The air bearing surface has a protective overcoat layer as an outermost layer, wherein the protective overcoat layer extends across the entire air bearing surface. The air bearing surface comprises a lapped surface and a plurality of milled surfaces, wherein a surface potential difference between the lapped surface and a milled surface is 0+/−50 milliVolts or less as measured according to Kelvin Probe Force Microscopy (KPFM).
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公开(公告)号：US11270724B1
公开(公告)日：2022-03-08
申请号：US17321032
申请日：2021-05-14
发明人： Shoji Suzuki
摘要： Techniques for determining a maximum permissible media deposition temperature for depositing one or more layers over a substrate of a heat assisted magnetic recording (HAMR) platform. In one aspect, a method includes controlling a thermomechanical analyzer to measure the mechanical expansion of a glass material versus temperature within a temperature range that is below the primary transformation temperature (Tg) of the glass material to detect a possible initial transformation that occurs within the glass material at a temperature (Tt) below the primary transformation temperature (Tg). If such an initial transformation is detected, the maximum deposition temperature is set based on the initial transformation temperature (Tt), rather than on the primary transformation temperature (Tg). Otherwise, the maximum permissible media deposition temperature is set based on the transformation temperature (Tg). In other aspects, methods for characterizing a glass material for suitability within the substrate of the HAMR platform are provided.
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公开(公告)号：US20210390976A1
公开(公告)日：2021-12-16
申请号：US17463368
申请日：2021-08-31
发明人： Thao A. NGUYEN , Michael Kuok San HO , Zhigang BAI , Zhanjie LI , Quang LE
摘要： The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a first write head, a second write head, at least one read head, and a thermal fly height control element. The first write head is a wide writing write head comprising a first main pole and a first trailing shield. The second write head a narrow writing write head comprising a second main pole, a trailing gap, a second trailing shield, and one or more side shields. The first main pole has a shorter height and a greater width than the second main pole. The second main pole has a curved or U-shaped surface disposed adjacent to the trailing gap. The thermal fly height control element and the at least one read head are aligned with a center axis of the second main pole of the second write head.
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公开(公告)号：US20210366515A1
公开(公告)日：2021-11-25
申请号：US17319444
申请日：2021-05-13
发明人： Helene Parwana Habibi , Simon Bance , Martin Liam McGarry , Raul Horacio Andruet , Martin Giles Blaber , Weibin Chen , John Charles Duda , Mark Anthony Gubbins , Erik Jon Hutchinson , Vivek Krishnamurthy , Michael Allen Seigler , Chen Wang
摘要： A recording head comprises a write pole extending to an air-bearing surface. A near-field transducer is positioned proximate a first side of the write pole in a down-track direction. A heatsink structure is proximate the near-field transducer and positioned between the near-field transducer and the write pole. The heatsink structure extends beyond the near-field transducer in a cross-track direction and extends in a direction normal to the air-bearing surface.
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公开(公告)号：US20210166727A1
公开(公告)日：2021-06-03
申请号：US17151401
申请日：2021-01-18
发明人： Karim Tatah , Mourad Benakli , James Gary Wessel
IPC分类号： G11B7/1263 , H01S5/068 , H01S5/06 , H01S5/026 , H01S5/065 , G11B5/02 , G11B5/40 , G11B5/455 , G11B5/09
摘要： A method and apparatus provide for determining a temperature at a junction of a laser diode when the laser diode is operated in a lasing state that facilitates heat-assisted magnetic recording, comparing the junction temperature and an injection current supplied during the lasing state to stored combinations of junction temperature and injection current, and determining a likelihood of mode hopping occurring for the laser diode during the lasing state based on the comparison to stored combinations of junction temperature and injection current.
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公开(公告)号：US11004467B2
公开(公告)日：2021-05-11
申请号：US16408738
申请日：2019-05-10
摘要： A data storage device can transition a functional data storage medium into a read only data surface. Data can be written to a data storage medium with a data writer of a transducing head prior to a security threat being identified. A write head of the transducing head is deactivated in response to the security threat by selecting a permanent deactivation mechanism.
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公开(公告)号：US10811038B1
公开(公告)日：2020-10-20
申请号：US16597935
申请日：2019-10-10
摘要： A heat-assisted magnetic recording head includes a write pole tip that extends to a media-facing surface and a heat sink that is thermally coupled to a side of the write pole tip. A surface plasmonic plate is in contact with a side of the heat sink that faces away from the write pole and is recessed from, the media-facing surface. A nanorod extends from a surface of the surface plasmonic plate and towards the media-facing surface.
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公开(公告)号：US10811036B2
公开(公告)日：2020-10-20
申请号：US16154596
申请日：2018-10-08
IPC分类号： G11B5/187 , G11B5/23 , G11B5/29 , G11B5/008 , G11B5/31 , G11B5/265 , G11B5/10 , G11B5/255 , G11B5/40
摘要： A magnetic head, according to one embodiment, includes a rowbar substrate having a tape support surface and a gap surface at a substrate edge. A closure is positioned opposite the gap surface of the rowbar substrate, the closure forming a portion of the tape support surface. A recessed gap region is interposed between the gap surface of the rowbar substrate and the closure, the recessed gap region having a recessed gap profile that extends between the gap surface of the rowbar substrate and the closure, the recessed gap region having a transducer row with at least one magnetic sensor on the gap surface of the rowbar substrate. An insulation layer is positioned over the recessed gap profile of the recessed gap region.
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