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公开(公告)号:US10381035B2
公开(公告)日:2019-08-13
申请号:US14251889
申请日:2014-04-14
摘要: Methods for magnetic recording are provided. The method can include: assembling a plurality of nanoparticles into a pattern on a disc; applying a polymer composition onto the pattern of nanoparticles; curing the polymer composition to form a polymer film on the disc, wherein the plurality of nanoparticles are immobilized in the pattern within the polymer film upon curing; and removing the polymer film containing the plurality of nanoparticles in the pattern. Diffraction gratings are also provided that can include a polymeric film comprising a plurality of nanoparticles immobilized in a pattern, wherein the polymer film defines a curvature.
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公开(公告)号:US10360936B2
公开(公告)日:2019-07-23
申请号:US15885013
申请日:2018-01-31
申请人: SHOWA DENKO K.K.
发明人: Kazuya Niwa , Tetsuya Kanbe , Yuji Murakami , Lei Zhang , Hisato Shibata , Takayuki Fukushima , Satoru Nakajima , Takehiro Yamaguchi
IPC分类号: G11B5/65 , G11B5/738 , G11B5/39 , G11B5/73 , G11B5/187 , G11B5/74 , G11B5/714 , G11B5/012 , G11B5/31 , G11B5/00
摘要: The invention provides a magnetic recording medium with an excellent signal-to-noise ratio during reading by reducing the noise produced during writing of data onto the magnetic recording medium, and increasing the signal level. The assisted magnetic recording medium according to one embodiment comprising a substrate, a base layer, and a magnetic layer composed mainly of an alloy with an L10-type crystal structure, the assisted magnetic recording medium having a pinning layer in contact with the magnetic layer, and the pinning layer including Co or an alloy composed mainly of Co.
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公开(公告)号:US10347281B2
公开(公告)日:2019-07-09
申请号:US14728871
申请日:2015-06-02
发明人: Hitesh Arora , Bruce Gurney , Olav Hellwig , Jodi Mari Iwata , Tiffany Suzanne Santos , Dieter K. Weller , Frank Zhu
摘要: Methods are disclosed for increasing areal density in Heat Assisted Magnetic Recording (HAMR) data storage systems by controlling the media layer grain size, grain size distribution, and pitch via templating techniques that are compatible with the high temperature HAMR media deposition. Embodiments include using current HAMR media seed layers as well as additionally introduced interlayers for the templating process. Topographic as well as chemical templating methods are disclosed that may employ nanoimprint technology or nanoparticle self-assembly among other patterning techniques.
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公开(公告)号:US10332557B1
公开(公告)日:2019-06-25
申请号:US16130451
申请日:2018-09-13
摘要: A servo sector on a disk is read via first and second readers that both span two or more user data tracks. The servo sector has a crosstrack width that spans the two or more user data tracks. The first reader provides a first signal based on detecting a total longitudinal field of the servo sector. The second reader provides a second signal based on detecting a total perpendicular field of the servo sector. A position error of the first and second readers is detected using. A value of the first signal can be used to detect a position error, detect a track-to-track phase error, and/or detect a Gray code error of a track ID field of the servo sector.
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公开(公告)号:US20180373452A1
公开(公告)日:2018-12-27
申请号:US16018360
申请日:2018-06-26
摘要: Disclosed herein are magnetic storage media with embedded disconnected circuits, and magnetic storage systems comprising such media. A magnetic storage media comprises a recording layer comprising a storage location, and an embedded disconnected circuit (EDC) configured to assist in at least one of writing to or reading from the storage location in response to a wireless activation signal. A magnetic storage system comprises a signal generator configured to generate a wireless activation signal, a magnetic storage media with a plurality of storage locations, and a write transducer and/or a read receiver. The magnetic storage media has at least one EDC configured to assist in writing to and/or reading from at least one of the plurality of storage locations in response to the wireless activation signal.
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公开(公告)号:US20180261245A1
公开(公告)日:2018-09-13
申请号:US15885013
申请日:2018-01-31
申请人: SHOWA DENKO K.K.
发明人: Kazuya NIWA , Tetsuya KANBE , Yuji MURAKAMI , Lei ZHANG , Hisato SHIBATA , Takayuki FUKUSHIMA , Satoru NAKAJIMA , Takehiro YAMAGUCHI
CPC分类号: G11B5/656 , G11B5/012 , G11B5/1875 , G11B5/3133 , G11B5/3912 , G11B5/714 , G11B5/73 , G11B5/7325 , G11B5/746 , G11B2005/0021
摘要: The invention provides a magnetic recording medium with an excellent signal-to-noise ratio during reading by reducing the noise produced during writing of data onto the magnetic recording medium, and increasing the signal level. The assisted magnetic recording medium according to one embodiment comprising a substrate, a base layer, and a magnetic layer composed mainly of an alloy with an L10-type crystal structure, the assisted magnetic recording medium having a pinning layer in contact with the magnetic layer, and the pinning layer including Co or an alloy composed mainly of Co.
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公开(公告)号:US20180226096A1
公开(公告)日:2018-08-09
申请号:US15947095
申请日:2018-04-06
发明人: Jun CHEN , NICHOLAS R. CONLEY , BRUCE A. GURNEY , RICARDO RUIZ , LEI WAN , QING ZHU
摘要: In one embodiment, a structure includes: a substrate; and a monolayer of nanoparticles positioned above the substrate, where the nanoparticles are each grafted to one or more oligomers and/or polymers, and where each of the polymers and/or oligomers includes at least a first functional group configured to bind to the nanoparticles. In another embodiment, a structure includes: a substrate; a structured layer positioned above the substrate, the structured layer comprising a plurality of nucleation regions and a plurality of non-nucleation regions; and a crystalline layer positioned above the structured layer, where the plurality of nucleation regions have a pitch in a range between about 5 nm to about 20 nm.
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公开(公告)号:US10032467B2
公开(公告)日:2018-07-24
申请号:US15827230
申请日:2017-11-30
发明人: Mark Anthony Gubbins , Robert William Lamberton , Robert Edward Weinstein , James Joseph Touchton
CPC分类号: G11B5/02 , B82Y10/00 , G11B5/3133 , G11B5/746 , G11B5/82 , G11B20/10009 , G11B20/10222 , G11B20/1024 , G11B20/10388 , G11B20/10425 , G11B2005/0005 , G11B2220/252
摘要: The presently disclosed technology teaches integrating disc drive electronics into a transducer head. Decreased electrical transit times and data processing times can be achieved by placing the electronics on or within the transducer head because electrical connections may be made physically shorter than in conventional systems. The electronics may include one or more of a control system circuit, a write driver, and/or a data buffer. The control system circuit generates a modified clock signal that has a fixed relation to phase and frequency of a bit-detected reference signal that corresponds to positions of patterned bits on the disc. The write driver writes outgoing data bits received from an external connection to off-head electronics directly to the writer synchronized with the modified clock signal. The data buffer stores and converts digital data bits sent from the off-head electronics to an analog signal that is synchronized with the modified clock signal.
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公开(公告)号:US09928867B2
公开(公告)日:2018-03-27
申请号:US14728908
申请日:2015-06-02
发明人: Shuaigang Xiao , XiaoMin Yang , ZhaoNing Yu , Yautzong Hsu
IPC分类号: G11B5/855 , G11B5/74 , H01L21/00 , H01L21/302 , G03F7/00
CPC分类号: G11B5/855 , G03F7/0002 , G11B5/746 , H01L21/00 , H01L21/302 , Y10T428/24802 , Y10T428/24926
摘要: Provided herein are apparatuses and methods, including patterning a first set of features in a servo zone to form a patterned servo zone while a first mask protects a data zone from the patterning. The first mask may be removed from the data zone. The apparatuses and methods may further include patterning a second set of features in the data zone to form a patterned data zone while a second mask protects the patterned servo zone from the patterning.
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公开(公告)号:US20180033460A1
公开(公告)日:2018-02-01
申请号:US15729531
申请日:2017-10-10
CPC分类号: G11B20/1252 , B82Y20/00 , G02B6/12007 , G11B5/743 , G11B7/0045 , G11B11/002 , G11B20/10
摘要: Data can be encoded in physical medium and represented by shapes having many various physical attributes. In various examples, data points are encoded and represented by the physical shape, color, size, and/or structure of objects. In one embodiment, holes in memory surface substrates represent data. Various attributes of such holes, including depth, profile size, profile shape, and/or angle can represent data.
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