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1. 发明授权

US11127424B1 Thermally-assisted magnetic recording head having active layer with quantum dot structure 有权
公开(公告)号：US11127424B1
公开(公告)日：2021-09-21
申请号：US16950885
申请日：2020-11-17
申请人： SAE Magnetics (H.K.) Ltd.
发明人： Kang Gao , Seiichi Takayama , Ryo Hosoi , Ryuji Fujii
IPC分类号： G11B11/105 , G11B5/48 , G11B5/39 , G11B13/04 , G11B13/08 , G11B5/00
摘要： A light source-unit includes a laser diode, a sub-mount which the laser diode is joined. The laser diode includes an optical generating layer including an active layer which emits laser-light and cladding layers being formed so as to sandwich the active layer. The active layer includes a quantum dot layer including a plurality of quantum dots, which respectively confine movements of carriers in the three-dimensional directions.

2. 发明授权

US11043232B1 Spin torque reversal assisted magnetic recording (STRAMR) device having a width substantially equal to that of a traililng shield 有权
公开(公告)号：US11043232B1
公开(公告)日：2021-06-22
申请号：US16781618
申请日：2020-02-04
申请人： Headway Technologies, Inc.
发明人： Yan Wu
IPC分类号： G11B5/31 , G11B5/11 , G11B13/04 , G11B5/127 , G11B5/187 , G11B5/00 , G11B5/23
摘要： A spin transfer torque reversal assisted magnetic recording (STRAMR) device is disclosed wherein a flux change layer (FCL) is formed between a main pole (MP) trailing side and a trailing shield (TS). The FCL has a magnetization that flips to a direction substantially opposing the write gap magnetic field when a direct current (DC) of sufficient current density is applied across the STRAMR device thereby increasing reluctance in the WG and producing a larger write field output at the air bearing surface. Heat transfer in the STRAMR device is enhanced and production cost is reduced by enlarging the STRAMR width to be essentially equal to that of the TS, and where the TS and STRAMR widths are formed using the same process steps. Bias voltage is used to control the extent of FCL flipping to a center portion to optimize the gain in area density capability in the recording system.

3. 发明授权

US10515658B1 Laser calibration using temperature compensation equation for heat-assisted magnetic recording device 有权
公开(公告)号：US10515658B1
公开(公告)日：2019-12-24
申请号：US16151910
申请日：2018-10-04
申请人： Seagate Technology LL
发明人： Drew Michael Mader
IPC分类号： G11B11/105 , G11B5/012 , G11B13/04 , G11B5/00 , G11B7/1267 , G11B7/1263 , G11B7/126
摘要： A method includes generating, during manufacture of a heat-assisted magnetic recording (HAMR) disk drive, a temperature compensation equation for a compensation factor using initial operating currents supplied to a laser diode of the disk drive at different initial operating temperatures and an efficiency value based on the initial operating temperatures. The operating currents are representative of currents for recording data to or erasing data from a magnetic recording medium. The temperature compensation equation is stored in the disk drive. A subsequent efficiency value is determined based on at least one of the initial operating temperatures and an operating temperature differing from the initial operating temperatures. An updated compensation factor at the operating temperature is determined during field operation using the temperature compensation equation and the subsequent efficiency value. An updated operating current is calculated using the updated compensation factor and the operating temperature. A current supplied to the laser diode for a subsequent write operation is adjusted to the updated operating current.

4. 发明授权

US10061088B1 Optical spatial mode filter for removing fundamental mode components in a HAMR light path 有权
公开(公告)号：US10061088B1
公开(公告)日：2018-08-28
申请号：US15831722
申请日：2017-12-05
申请人： Seagate Technology LLC
发明人： Chubing Peng
IPC分类号： G11B11/00 , G02B6/35 , G11B5/48 , G11B11/105 , G11B13/04 , G02B6/02 , G02B6/26 , G11B5/00
CPC分类号： G02B6/3532 , G02B6/02076 , G02B6/1226 , G02B6/14 , G02B6/262 , G02B6/2813 , G11B5/314 , G11B5/4866 , G11B5/6088 , G11B11/10539 , G11B11/10595 , G11B13/045 , G11B2005/0021
摘要： A first waveguide portion receives light from an energy source in a fundamental transverse electric (TE00) mode. A mode converter converts a portion of the light to higher-order transverse electric (TE10) mode. A second waveguide portion receives the light at the TE10 mode and delivers the light to a near-field transducer that heats a recording medium in response thereto. An optical spatial mode filter prevents remnant light in the TE00 mode from affecting the recording medium while passing the light at the TE10 mode.

5. 发明申请

US20180239853A1 RECORDING MEDIUM RECORDING MAGNETIC MATERIAL SIMULATION PROGRAM, MAGNETIC MATERIAL SIMULATION METHOD AND INFORMATION PROCESSING APPARATUS 审中-公开
公开(公告)号：US20180239853A1
公开(公告)日：2018-08-23
申请号：US15888128
申请日：2018-02-05
申请人： FUJITSU LIMITED
发明人： Koichi Shimizu
IPC分类号： G06F17/50 , G06K19/06 , G01R33/00 , G11B5/012 , G11B13/04
CPC分类号： G06F17/5018 , G01R33/0064 , G06F17/5036 , G06K19/06196 , G11B5/012 , G11B7/00 , G11B11/105 , G11B13/045 , G11B2005/001
摘要： A recording medium recording a magnetic material simulation program includes: acquiring a shape model including element regions of a shape of a core, property information indicating physical properties of a magnetic material of the core, and coil current information indicating a time change in a current through a coil around the core; specifying a first current density of the coil at a first time, based on the coil current information; computing, using the property information and the first current density, first index values at the first time for positions in the shape model; computing, using the first index values, a charge density of each element region; specifying a second current density of the coil at a second time, based on the coil current information; and computing, using the property information, the second current density, and the charge density, second index values at the second time for the positions.

6. 发明授权

US09978403B1 Changing write coil current in response to reader instability 有权
公开(公告)号：US09978403B1
公开(公告)日：2018-05-22
申请号：US15435839
申请日：2017-02-17
申请人： Seagate Technology LLC
发明人： Wenzhong Zhu , Alfredo Sam Chu , Siew Kin Chow
IPC分类号： G11B21/02 , G11B5/31 , G11B5/60 , G11B5/48 , G11B5/39 , G11B13/04 , G11B11/105 , G11B5/00
CPC分类号： G11B5/3123 , G11B5/3103 , G11B5/3106 , G11B5/3133 , G11B5/3967 , G11B5/4826 , G11B5/4866 , G11B5/607 , G11B5/6088 , G11B13/04 , G11B2005/0021
摘要： Data is written to a recording medium via a read/write head. Subsequent to the writing, the data is read via a read transducer of a read/write head. An instability indicator is derived based on measurements performed while the reading the data. If the instability indicator exceeds a threshold, a current applied to a write coil of the read/write head is changed for subsequent write operations.

7. 发明授权

US09792946B2 Patterned media for heat assisted recording 有权
公开(公告)号：US09792946B2
公开(公告)日：2017-10-17
申请号：US13688106
申请日：2012-11-28
申请人： Seagate Technology LLC
发明人： Ibrahim Kursat Sendur , William Albert Challener , Chubing Peng
IPC分类号： G11B13/04 , B82Y10/00 , G11B5/012 , G11B5/74 , G11B5/82 , G11B5/855 , G11B5/00
CPC分类号： G11B13/04 , B82Y10/00 , G11B5/012 , G11B5/74 , G11B5/743 , G11B5/746 , G11B5/82 , G11B5/855 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021
摘要： A patterned magnetic recording medium for use in heat assisted magnetic recording comprises an electrically conductive heat sink layer and a plurality of discrete magnetic recording elements positioned adjacent to a first surface of the heat sink layer. Disc drives that include the patterned medium and a method of magnetic recording using the patterned media are also included.

8. 发明授权

US09449641B2 Color transmission systems 有权
标题翻译：彩色传输系统
公开(公告)号：US09449641B2
公开(公告)日：2016-09-20
申请号：US14578269
申请日：2014-12-19
申请人： Lucinda Price , Joseph Auciello , Charles Price , Stanley Jacobson
发明人： Lucinda Price , Joseph Auciello , Charles Price , Stanley Jacobson
IPC分类号： G11B11/00 , G11B20/00 , H04N1/46 , G11B13/04 , G11B20/10
CPC分类号： H04B10/80 , G11B13/045 , G11B20/00007 , G11B20/10009 , H04B10/40 , H04B10/502 , H04B10/503 , H04N1/46
摘要： A system comprises a writer to form a plurality of color mits on a base material, wherein at least one of the color mits may represent computer-readable instructions comprising data other than pixel-image data. The plurality of color mits may include a first color mit and a second color mit, wherein the first color mit represents information data, and the second color mit represents that the first color mit contains a particular type of information data. The system also may include a reader to read colors of the plurality of color mits on the base material. The system may comprise a device to map at least one of the color mits to computer-readable instructios. The system may further comprise a processor configured to transmit signals using a colored light.
摘要翻译：一种系统包括一个在基底材料上形成多个彩色凹版的写入器，其中至少一个色调可以表示包括像素图像数据以外的数据的计算机可读指令。所述多个颜色套件可以包括第一颜色mit和第二颜色mit，其中所述第一颜色mit表示信息数据，并且所述第二颜色mit表示所述第一颜色mit包含特定类型的信息数据。该系统还可以包括读取器，以读取基底材料上的多个彩色米具的颜色。该系统可以包括用于将至少一个颜色套件映射到计算机可读指导的设备。该系统还可以包括被配置为使用彩色光发射信号的处理器。

9. 发明申请

US20160117109A1 Multiprocessor Computing Apparatus with Wireless Interconnect and Non-Volatile Random Access Memory 审中-公开
标题翻译：具有无线互连和非易失性随机存取存储器的多处理器计算装置
公开(公告)号：US20160117109A1
公开(公告)日：2016-04-28
申请号：US14985805
申请日：2015-12-31
申请人： Sureshchandra B. Patel
发明人： Sureshchandra B. Patel
IPC分类号： G06F3/06 , G06F13/16 , H05K7/20 , G11B5/09 , G11B13/04 , H05K9/00 , G06F13/10 , G06F13/40
CPC分类号： G06F3/0604 , G06F1/16 , G06F1/1613 , G06F1/1656 , G06F1/182 , G06F1/20 , G06F3/0629 , G06F3/067 , G06F13/102 , G06F13/16 , G06F13/4068 , G11B5/09 , G11B13/045 , H05K7/20409 , H05K9/002
摘要： A fan less Multiprocessor Computing Apparatus (MCA) is housed in a metallic Enclosure (ME) that acts as a heat sink and provides extended surface area for heat dissipation. The ME also acts as an electro-magnetic-Shield that provides immunity from Electro-Magnetic-Interference (EMI) from external stray magnetic fields to wireless communications among components of MCA. The Wireless Interconnect (WLI) involving Transceiver Antenna can use whole range of radio, microwave, and optical frequencies involving transceivers and antennas. Printed Circuit Boards of MCA are mounted on inside of metallic surfaces of ME of any required size and shape. MEs are filled with vacuum or clean dust free air without any suspended particles for efficient and reliable communications. Electro-magnetically shielded and sealed MEs housing MCAs are made dust and water proof so that they can be placed under water in a sea or a river, particularly MCAs constituting large data/cloud centres. Also, Shared Memory Units are made up of non-volatile static Magneto-Optical or Optical recordable, erasable, and recordable media in square/rectangular form factor.
摘要翻译：多风扇多处理器计算设备（MCA）安装在金属外壳（ME）中，作为散热器，并提供扩展的表面积进行散热。 ME还充当电磁屏蔽，可从外部杂散磁场到MCA组件之间的无线通信提供免受电磁干扰（EMI）的抵抗。涉及收发天线的无线互连（WLI）可以使用涉及收发器和天线的全系列无线电，微波和光频。 MCA的印刷电路板安装在任何所需尺寸和形状的ME的金属表面的内部。充满真空或清洁无尘的空气，无任何悬浮颗粒，以实现有效和可靠的通讯。电磁屏蔽和密封的MEs容纳MCAs是防尘和防水的，以便它们可以放置在海洋或河流中的水下，特别是构成大型数据/云中心的MCA。此外，共享存储单元由非易失性静态磁光或光可记录，可擦除和可记录的介质组成，方形/矩形形状。

10. 发明授权

US09305586B2 Microwave-assisted magnetic recording device and method of formation thereof 有权
标题翻译：微波辅助磁记录装置及其形成方法
公开(公告)号：US09305586B2
公开(公告)日：2016-04-05
申请号：US13724914
申请日：2012-12-21
申请人： HGST Netherlands B.V.
发明人： Masafumi Mochizuki , Masukazu Igarashi
IPC分类号： G11B5/31 , G11B13/04 , G11B5/00
CPC分类号： G11B13/045 , G11B5/314 , G11B5/3146 , G11B2005/0002 , G11B2005/0024
摘要： A magnetic head, according to one embodiment, includes a magnetized high-speed rotor placed in the vicinity of a main magnetic pole, wherein the main magnetic pole generates a magnetized rotating magnetic field, wherein information is recorded by generating a high-frequency magnetic field from the magnetized high-speed rotor and switching the magnetic head between a magnetic resonance state and a magnetization state, and wherein the magnetic head has a structure such that leaking is reduced for magnetic fields applied parallel to a magnetized rotating surface of the magnetized high-speed rotor from the main magnetic pole. Additional systems and methods are also presented.
摘要翻译：根据一个实施例的磁头包括放置在主磁极附近的磁化高速转子，其中主磁极产生磁化的旋转磁场，其中通过产生高频磁场来记录信息从所述磁化高速转子开始，并且磁头在磁共振状态和磁化状态之间切换，并且其中所述磁头具有这样的结构，即对于磁化的高速转子的磁化旋转表面平行施加的磁场而言，高速转子从主磁极。还介绍了其他系统和方法。

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