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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：US11308981B2
公开(公告)日：2022-04-19
申请号：US17341553
申请日：2021-06-08
发明人： Shi Xiong Chen , Bin Qi , Wen Rong Guo , Peng Liu
摘要： A lapping method of a MAMR head slider includes a first lapping process: controlling the lapping plate to spin at a first speed, and controlling the MAMR head slider to move at a first moving speed, and applying a first force to the MAMR head slider; and a second lapping process: controlling the lapping plate to spin at a second speed that is lower than the first speed, and controlling the MAMR head slider to move at a second moving speed that is lower than the first moving speed, and applying a second force that is lower than the first force to the MAMR head slider; and the second lapping process includes a final lapping process section, and the second force in the final lapping process being zero. In such a way, lapping marks on the ABS are reduced to improve the roughness and the reliability.
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公开(公告)号：US11069374B2
公开(公告)日：2021-07-20
申请号：US15975015
申请日：2018-05-09
申请人： NHK SPRING CO., LTD.
发明人： Akio Mashima
摘要： A method of restoring a suspension of a hard disk drive includes detaching a slider, which is mounted on a tongue portion of the suspension via an adhesive, from the suspension, measuring a thickness of the adhesive in a cleaning area of the tongue portion, specifying a first residual area in which the thickness of the adhesive exceeds a threshold value, irradiating a first irradiation area including the first residual area locally with a first laser beam, and irradiating the cleaning area entirely with a second laser beam.
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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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公开(公告)号：US10726866B2
公开(公告)日：2020-07-28
申请号：US16297411
申请日：2019-03-08
发明人： Robert G. Biskeborn
IPC分类号： G11B15/43 , G11B15/62 , G11B5/008 , G11B5/255 , G11B5/187 , G11B5/39 , G11B15/60 , G11B5/58 , G11B5/31 , G11B5/48 , G11B5/40
摘要： According to one embodiment, a method includes running a magnetic recording tape over an edge of a tape bearing surface of a module, where the edge is proximate to a sensor of the module, detecting magnetic fields from the magnetic recording tape at different wrap angles, and selecting one of the wrap angles of the magnetic recording tape to provide about a predefined height of tenting of the magnetic recording tape above the sensor.
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公开(公告)号：US20190311740A1
公开(公告)日：2019-10-10
申请号：US16445076
申请日：2019-06-18
摘要： A method according to one embodiment includes running a magnetic recording tape over a tape bearing surface of a module having at least one edge, detecting signals from the tape at differing wrap angles for estimating a height of tenting of the tape above a transducer at each of the wrap angles, and selecting a wrap angle to provide about a predefined height of tenting of the tape above the transducer. A resulting tent of the moving magnetic recording tape extends from the edge of the module closest thereto to a minima with a tent apex therebetween, where the minima is at a first point of closest approach of the moving magnetic recording tape to the tape bearing surface of the module nearest the tent apex.
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公开(公告)号：US10083713B1
公开(公告)日：2018-09-25
申请号：US15678907
申请日：2017-08-16
CPC分类号： G11B5/3106 , G11B5/1278 , G11B5/187 , G11B5/255 , G11B5/314 , G11B5/3163 , G11B5/40 , G11B5/6082 , G11B5/6088 , G11B2005/0021
摘要： A heat-assisted magnetic recording (HAMR) head has a protective multilayer confined to a window of the disk-facing surface of the slider that surrounds the near-field transducer (NFT) end and write pole end. The protective multilayer is made up of alternating films of a metal and diamond-like carbon (DLC). All of the metal films are formed of the same metal selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and W, with the preferred metal being zirconium (Zr). A slider protective overcoat may be formed over the entire disk-facing surface in both the window region and the non-window region, with the protective multilayer formed on the slider overcoat in the window region. The overcoat may be absent in the window region, in which case an adhesion film is on the NFT and write pole ends in the window region, with the protective multilayer being formed on the adhesion film.
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公开(公告)号：US09940952B2
公开(公告)日：2018-04-10
申请号：US14860551
申请日：2015-09-21
发明人： Robert G. Biskeborn , Jason Liang , Calvin S. Lo
CPC分类号： G11B5/255 , G01N3/56 , G11B5/00821 , G11B5/187 , G11B5/455
摘要： A method according to one embodiment includes measuring an initial coating thickness on a tape bearing surface of a module in a carrier, running a tape across the tape bearing surface, and at intervals, measuring a residual thickness of the coating.
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公开(公告)号：US09704518B2
公开(公告)日：2017-07-11
申请号：US15079317
申请日：2016-03-24
发明人： Jianhua Li , Michael J. Link
CPC分类号： G11B5/00813 , C23C14/5853 , G11B5/255 , G11B5/3106 , G11B5/40 , G11B15/00 , G11B15/67
摘要： A tape head is provided for use with a tape drive that is configured to receive a length of tape. The tape head includes a head body including at least one head element for performing read and/or write operations on the tape, and a protective layer extending over at least a portion of the head body for inhibiting wear of the head body when the tape is moved with respect to the head body. Furthermore, the protective layer is made of titanium oxide, chromium oxide, zirconium oxide, aluminum oxide, or zinc oxide.
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