Patents Examined by Tan X Dinh
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Patent number: 11205455Abstract: A tape-shaped magnetic recording medium includes a substrate; and a magnetic layer that is provided on the substrate and contains a magnetic powder. An average thickness of the magnetic layer is not more than 90 nm, an average aspect ratio of the magnetic powder is not less than 1.0 and not more than 3.0, the coercive force Hc1 in a vertical direction is not more than 3000 Oe, and the coercive force Hc1 in the vertical direction and a coercive force Hc2 in a longitudinal direction satisfy a relationship of Hc2/Hc1?0.8.Type: GrantFiled: November 19, 2018Date of Patent: December 21, 2021Assignee: Sony CorporationInventors: Masaru Terakawa, Minoru Yamaga, Katsunori Maeshima
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Patent number: 11195547Abstract: According to one embodiment, a monitoring unit of a magnetic disk device monitors a supply voltage supplied to a plurality of actuators by a first threshold value at which power supply by back electromotive force of a motor is started, and a second threshold value that is larger than the first threshold value. In a case where the supply voltage is lower than or equal to the second threshold value and is higher than the first threshold value, a controller interrupts execution of processing of reading/writing data to a magnetic disk in at least one of the actuators according to a predetermined condition based on execution status of the processing in the actuators.Type: GrantFiled: March 4, 2020Date of Patent: December 7, 2021Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventor: Kazuo Chokki
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Patent number: 11189985Abstract: An optoelectronic assembly is disclosed. The disclosed assembly includes one or more lasers formed on a first substrate, and a programmable driver circuit formed on a second substrate configured as an integrated circuit. The first and second substrates are mounted on a third substrate in a stacked arrangement.Type: GrantFiled: December 6, 2019Date of Patent: November 30, 2021Assignee: II-VI DELAWARE, INC.Inventors: David Allouche, Michael Chu, Brian R. Carey, Jonathan Ashbrook, Anita Chan, Krzysztof Szczerba
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Patent number: 11189308Abstract: A magnetic tape reading apparatus including: a reading head which includes a reading unit disposed at a position corresponding to a single track included in a magnetic tape; a controller which controls the reading unit to read data plural times from a specific range of the single track in a running direction of the magnetic tape by a linear scan method; and a synthesis unit which synthesizes a plurality of reproducing signal sequences obtained by reading data plural times from the specific range by the reading unit.Type: GrantFiled: March 18, 2020Date of Patent: November 30, 2021Assignee: FUJIFILM CorporationInventor: Atsushi Musha
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Patent number: 11183209Abstract: A magnetic recording medium in a shape of a tape that is long in a longitudinal direction and is short in a width direction is provided, the medium including: a base material; and a magnetic layer, in which the magnetic layer includes a data band long in the longitudinal direction in which a data signal is to be written, and a servo band long in the longitudinal direction in which a servo signal is written, and in the magnetic layer, a degree of vertical orientation is greater than or equal to 65%, a half width of a solitary waveform in a reproduction waveform of the servo signal is less than or equal to 195 nm, a thickness of the magnetic layer is less than or equal to 90 nm, and a thickness of the base material is less than or equal to 4.2 ?m.Type: GrantFiled: February 18, 2019Date of Patent: November 23, 2021Assignee: Sony CorporationInventors: Minoru Yamaga, Tooru Sato, Toshiaki Miura, Takanobu Iwama, Jun Takahashi
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Patent number: 11183208Abstract: A recording device, a control device, a recording method, a recording tape cartridge, and a data recording and reproducing system capable of accurately positioning a data recording and reproducing head are obtained. A recording device includes a recording unit that records information on linearity of a servo signal recorded on a magnetic tape included in a recording tape cartridge on an RFID tag included in the recording tape cartridge.Type: GrantFiled: December 9, 2020Date of Patent: November 23, 2021Assignee: FUJIFILM CORPORATIONInventor: Yoichi Akano
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Patent number: 11183213Abstract: The present disclosure provides a tape-shaped magnetic recording medium, including: a base; and a magnetic layer that is provided on the base and contains a magnetic powder, in which an average particle volume V of the magnetic powder is 2,000 nm3 or less, an average thickness of the magnetic recording medium is 5.3 ?m or less, a thermal stability KuV/kBT of the magnetic recording medium is 60 or more, and a ratio Hrp/Hc1 of a residual coercive force Hrp of the magnetic recording medium measured using a pulsed magnetic field to a coercive force Hc1 of the magnetic recording medium in a perpendicular direction is 2.10 or less.Type: GrantFiled: July 1, 2020Date of Patent: November 23, 2021Assignee: Sony CorporationInventors: Takashi Kataguchi, Natsuki Ichise, Takeshi Takahashi
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Patent number: 11176962Abstract: A heat-assisted magnetic recording head includes a slider body having a waveguide that delivers light to a near-field transducer. The waveguide is optically coupled to an input coupler a of the slider body that receives the light. A laser diode is mounted on or in the slider body. The laser diode has an integral exit facet proximate the input coupler. The exit facet has a curved profile that modifies a shape of the light emitted from the exit facet into the input coupler.Type: GrantFiled: September 10, 2020Date of Patent: November 16, 2021Assignee: Seagate Technology LLCInventors: Aidan Dominic Goggin, Reyad Mehfuz, John Moloney
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Patent number: 11176964Abstract: A method for indexing a tape for unmounting from a tape drive is discussed. The method can determine that an update has been made to the tape since it was last mounted. The method can identify a tape head position with respect to the tape, the tape including a data partition and an index partition. The method can identify first position and a second position on the tape. The method can determine first distance, a length of tape between first position and tape head position. The method can determine second distance, a length of tape between first position and second position. The method can determine that first distance is less than second distance. The method can reposition the tape to a primary section and write the metadata index. The method can reposition tape to the second position write a data index beginning at the second position of the data partition.Type: GrantFiled: October 29, 2020Date of Patent: November 16, 2021Assignee: International Business Machines CorporationInventors: Tohru Hasegawa, Tsuyoshi Miyamura, Atsushi Abe, Shinsuke Mitsuma, Hiroshi Itagaki, Noriko Yamamoto, Sosuke Matsui
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Patent number: 11170814Abstract: The present disclosure relates to pretreating a magnetic recording head. For a HAMR head, a NFT is present. Current can be applied to the NFT to condition the NFT. The current is applied in one of three ways: slowly ramping up the current from a starting level below a level capable of writing data to the optical laser current over a predetermined period of time, applying the current at a fixed value below the optical laser current for the predetermined period of time, or slowly ramping up the current from a starting level below a level capable of writing data to the optical laser current over the predetermined period of time while also intermittently removing the current. By conditioning the NFT in such a manner, the HAMR head can avoid thermal shock and thermal fatigue and thus increase the lifetime of the magnetic media drive.Type: GrantFiled: June 24, 2020Date of Patent: November 9, 2021Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Sukumar Rajauria, Oscar Ruiz, Erhard Schreck
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Patent number: 11171465Abstract: A submount includes a substrate, the substrate including: a first surface; a second surface that is perpendicular to the first surface; a third surface that is perpendicular to the first surface and the second surface; a fourth surface that is perpendicular to the first surface and the second surface, and is opposed to the third surface; a fifth surface that is perpendicular to the second surface and the third surface, and is opposed to the first surface; a sixth surface that is opposed to the second surface; a first notch part that is provided in a portion at which the second surface and the third surface are adjacent to each other; and a second notch part that is provided in a portion at which the second surface and the fourth surface are adjacent to each other, the first notch part and the second notch part each having a recessed surface.Type: GrantFiled: January 31, 2020Date of Patent: November 9, 2021Assignee: NUVOTON TECHNOLOGY CORPORATION JAPANInventors: Shinichi Ijima, Kazumasa Nagano, Norio Ikedo
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Patent number: 11162169Abstract: Devices having an air bearing surface (ABS), the device including a near field transducer, the near field transducer having a peg and a disc, the peg having a region adjacent the ABS, the peg including a plasmonic material selected from gold (Au), silver (Ag), copper (Cu), ruthenium (Ru), rhodium (Rh), aluminum (Al), or combinations thereof; and at least one other secondary atom selected from germanium (Ge), tellurium (Te), aluminum (Al), antimony (Sb), tin (Sn), mercury (Hg), indium (In), zinc (Zn), iron (Fe), copper (Cu), manganese (Mn), silver (Ag), chromium (Cr), cobalt (Co), and combinations thereof, wherein a concentration of the secondary atom is higher at the region of the peg adjacent the ABS than a concentration of the secondary atom throughout the bulk of the peg. Methods of forming NFTs are also disclosed.Type: GrantFiled: December 24, 2019Date of Patent: November 2, 2021Assignee: Seagate Technology LLCInventors: Tong Zhao, Michael C. Kautzky, Sarbeswar Sahoo, Justin Brons, Jie Gong, Yuhang Cheng
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Patent number: 11157364Abstract: ECC is used to for controlling errors in blocks of data by including a measure of redundancy within the data for recovering one or more unreadable portions of the data. A codeword includes at least a message and one or more additional ECC blocks. In the event of an unreadable sector, the ECC is decoded and used to recover the erroneous or missing portion(s) of the message. With disc access parallelism, ECCs can now be distributed across data storage surfaces and/or multiple storage platters. Distribution of ECCs increases the likelihood of recovering data from a head failure or from burst errors on a data storage surface and adds the option to decode parity after only 1/n revolutions.Type: GrantFiled: June 29, 2020Date of Patent: October 26, 2021Assignee: SEAGATE TECHNOLOGY LLCInventors: David Andrew Rice, Ajay Narayan Kulkarni, Brian T. Edgar
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Hearing assistance device using unencoded advertisement for eavesdropping on Bluetooth master device
Patent number: 11159896Abstract: Disclosed herein, among other things, are systems and methods for eavesdropping on a data stream for hearing assistance devices. One aspect of the present subject matter includes a hearing assistance system for a wearer including a Bluetooth host device having a transmitter configured to send data including one or more encoded audio streams, and a data channel having an advertisement that includes frequency information, frequency hop sequences, information for decoding audio streams, and security keys for decoding audio stream information. The system also includes one or more Bluetooth slave devices identified by the Bluetooth host device. The Bluetooth slave devices are configured to actively participate in a connection with the host device to aid the host transmitter in deciding which frequencies to use for frequency hopping and in determining which frequencies are being interfered with and should not be included in a channel map, according to various embodiments.Type: GrantFiled: July 16, 2020Date of Patent: October 26, 2021Assignee: Starkey Laboratories, Inc.Inventor: Jeffrey Paul Solum -
Patent number: 11152018Abstract: A computer-implemented method for indexing a tape for unmounting from a tape drive. The computer-implemented method includes: receiving a request to unmount the tape from the tape drive, wherein the tape includes an index partition and a data partition, determining that an update to the tape is not reflected in any data index written in the data partition, appending a new data index at the end of the last written data file in the data partition, wherein the new data index includes information associated with the update to the tape, unthreading the tape from the tape drive, wherein unthreading the tape from the tape drive is performed at low tension writing a metadata index to an ancillary storage device, wherein the metadata index includes information associated with the update to the tape.Type: GrantFiled: October 29, 2020Date of Patent: October 19, 2021Assignee: International Business Machines CorporationInventors: Tohru Hasegawa, Tsuyoshi Miyamura, Shinsuke Mitsuma, Hiroshi Itagaki, Noriko Yamamoto, Sosuke Matsui
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Patent number: 11141817Abstract: An optical unit includes: a first optical device holding body that is sleeve-shaped and includes a first holding portion configured to hold therein at least one first optical device, and a first fitting portion extending from the first holding portion; a second optical device holding body that is sleeve-shaped and includes a second holding portion configured to hold therein at least one second optical device, and a second fitting portion extending from the second holding portion; and a welded portion that is melted and solidified over the first fitting portion and the second fitting portion in an overlapping portion between the first fitting portion and the second fitting portion. A first welding width at a center of the first fitting portion and a second welding width at a center of the second fitting portion are substantially identical in the optical axis direction of the optical unit.Type: GrantFiled: May 9, 2019Date of Patent: October 12, 2021Assignee: OLYMPUS CORPORATIONInventors: Keiichi Asami, Junichi Okubo
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Patent number: 11138996Abstract: A data storage device is disclosed comprising at least one head configured to access a magnetic tape comprising a plurality of data tracks, wherein each data track comprises a plurality of data segments and a plurality of servo sectors. The head is used to read one of the servo sectors to generate a first read signal. The first read signal is processed to generate a position error signal (PES) of the head relative to the magnetic tape, wherein the head is positioned relative to the magnetic tape based on the PES. The head is used to read one of the data segments to generate a second read signal, wherein the second read signal is processed to detect user data recorded in the data segment.Type: GrantFiled: May 8, 2020Date of Patent: October 5, 2021Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Richard L. Galbraith, Weldon M. Hanson, Derrick E. Burton, Niranjay Ravindran, Iouri Oboukhov
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Patent number: 11127424Abstract: 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.Type: GrantFiled: November 17, 2020Date of Patent: September 21, 2021Assignee: SAE Magnetics (H.K.) Ltd.Inventors: Kang Gao, Seiichi Takayama, Ryo Hosoi, Ryuji Fujii
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Patent number: 11127426Abstract: According to one embodiment, a magnetic disk device includes a disk including a recording region including a servo sector, a head configured to write data to the disk and read data from the disk, and a controller configured to acquire a plurality of correction data for a repeatable runout of the recording region, the correction data respectively corresponding to a plurality of measurement positions set based on a first linearity error acquired by reading the servo sector, and to correct a position of the head based on the correction data.Type: GrantFiled: July 7, 2020Date of Patent: September 21, 2021Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage CorporationInventor: Naoki Tagami
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Patent number: 11120824Abstract: An apparatus comprises a slider configured for heat-assisted magnetic recording comprising an air bearing surface (ABS). The slider comprises a write pole at or near the ABS, and a near-field transducer (NFT) at or near the ABS and proximate the write pole. A main waveguide is configured to receive light from a laser source and communicate the light to the NFT. An optical power sensor comprises a tap waveguide optically coupled to the main waveguide and comprising a first end and an opposing second end. The optical power sensor also comprises a bolometer optically coupled to the tap waveguide and configured to receive a portion of the light extracted from the main waveguide by the tap waveguide.Type: GrantFiled: August 26, 2020Date of Patent: September 14, 2021Assignee: Seagate Technology LLCInventors: Chubing Peng, Vivek Krishnamurthy, Nils Jan Gokemeijer