Patents by Inventor Hongquan Jiang
Hongquan Jiang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12131759Abstract: The present disclosure generally relates to a dual free layer (DFL) two dimensional magnetic recording (TDMR) read head, and a method of forming thereof. The read head comprises a lower sensor, middle shields disposed on the lower sensor, and an upper sensor disposed on the middle shields. After the lower reader is formed, a dielectric layer is deposited around an outer perimeter of the lower shield. Portions of the dielectric layer are ion milled such that the remaining portions form a substantially flat layer. Another embodiment includes a deposition of a TaOx layer on the dielectric layer, where x is a numeral. Portions of the dielectric layer and the TaOx layer are then ion milled such that the remaining portions of the TaOx layer and the dielectric layer collectively form a substantially planar layer. The middle shields are formed over the lower reader and are substantially planar.Type: GrantFiled: July 26, 2023Date of Patent: October 29, 2024Assignee: Western Digital Technologies, Inc.Inventors: Hongquan Jiang, Guanxiong Li, Ming Mao
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Publication number: 20240153533Abstract: The present disclosure generally relates to a dual free layer (DFL) two dimensional magnetic recording (TDMR) read head, and a method of forming thereof. The read head comprises a lower sensor, middle shields disposed on the lower sensor, and an upper sensor disposed on the middle shields. After the lower reader is formed, a dielectric layer is deposited around an outer perimeter of the lower shield. Portions of the dielectric layer are ion milled such that the remaining portions form a substantially flat layer. Another embodiment includes a deposition of a TaOx layer on the dielectric layer, where x is a numeral. Portions of the dielectric layer and the TaOx layer are then ion milled such that the remaining portions of the TaOx layer and the dielectric layer collectively form a substantially planar layer. The middle shields are formed over the lower reader and are substantially planar.Type: ApplicationFiled: July 26, 2023Publication date: May 9, 2024Applicant: Western Digital Technologies, Inc.Inventors: Hongquan JIANG, Guanxiong LI, Ming MAO
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Patent number: 11776565Abstract: The present disclosure generally relates to a tape head of a tape drive, and methods of forming thereof. In one embodiment, a tape head for magnetic storage devices comprises a trailing shield, a leading shield, a first write pole coupled to the trailing shield, a second write pole coupled to the leading shield, and side shields spaced from the first write pole and the second write pole by a thin insulation layer. The side shields are further disposed between the trailing shield and the leading shield. In another embodiment, a tape head for magnetic storage devices comprises a main pole disposed between a trailing shield and a leading shield and a side shield disposed adjacent to the main pole. The side shield is further disposed between the trailing shield and the leading shield and spaced from the main pole by a thin insulation layer.Type: GrantFiled: January 12, 2022Date of Patent: October 3, 2023Assignee: Western Digital Technologies, Inc.Inventors: Quang Le, Hongquan Jiang, Cherngye Hwang, David J. Seagle, Xiaoyong Liu
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Patent number: 11735211Abstract: The present disclosure relates to read head apparatus, and methods of forming read head apparatus, for magnetic storage devices, such as magnetic tape drives (e.g., tape drives). In one implementation, a read head for magnetic storage devices includes a lower shield, one or more upper shields, one or more lower leads, and a plurality of upper leads. The read head includes a plurality of read sensors, each read sensor of the plurality of read sensors including a first antiferromagnetic (AFM) layer. The read head includes a plurality of soft bias side shields disposed between and outwardly of the plurality of read sensors. The read head includes one or more second AFM layers disposed above the first AFM layer and the plurality of soft bias side shields along a downtrack direction.Type: GrantFiled: July 18, 2022Date of Patent: August 22, 2023Assignee: Western Digital Technologies, Inc.Inventors: Quang Le, Hongquan Jiang, Cherngye Hwang, Hisashi Takano
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Publication number: 20230223043Abstract: The present disclosure generally relates to a tape head of a tape drive, and methods of forming thereof. In one embodiment, a tape head for magnetic storage devices comprises a trailing shield, a leading shield, a first write pole coupled to the trailing shield, a second write pole coupled to the leading shield, and side shields spaced from the first write pole and the second write pole by a thin insulation layer. The side shields are further disposed between the trailing shield and the leading shield. In another embodiment, a tape head for magnetic storage devices comprises a main pole disposed between a trailing shield and a leading shield and a side shield disposed adjacent to the main pole. The side shield is further disposed between the trailing shield and the leading shield and spaced from the main pole by a thin insulation layer.Type: ApplicationFiled: January 12, 2022Publication date: July 13, 2023Applicant: Western Digital Technologies, Inc.Inventors: Quang LE, Hongquan JIANG, Cherngye HWANG, David J. SEAGLE, Xiaoyong LIU
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Publication number: 20230186946Abstract: The present disclosure is generally related to a tape drive including a tape head configured to read shingled data on a tape. The tape head comprises a first module head assembly aligned with a second module head assembly. Both the first and second module head assemblies comprises a plurality of data heads. Each data head comprises a write head, a first read head aligned with the write head, a second read head offset from the first read head in both a cross-track direction and a down-track direction, and a third read head offset from the first and/or second read heads in the cross-track and down-track directions. By utilizing three read heads within each data head, data can be read from a tape that has experienced tape dimensional stability, as at least one read head will be near a center of each data track of the tape.Type: ApplicationFiled: December 15, 2021Publication date: June 15, 2023Inventors: Quang LE, Xiaoyong LIU, Hongquan JIANG, Cherngye HWANG, Kuok San HO, Hisashi TAKANO
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Patent number: 11670329Abstract: The present disclosure is generally related to a tape drive including a tape head configured to read shingled data on a tape. The tape head comprises a first module head assembly aligned with a second module head assembly. Both the first and second module head assemblies comprises a plurality of data heads. Each data head comprises a write head, a first read head aligned with the write head, a second read head offset from the first read head in both a cross-track direction and a down-track direction, and a third read head offset from the first and/or second read heads in the cross-track and down-track directions. By utilizing three read heads within each data head, data can be read from a tape that has experienced tape dimensional stability, as at least one read head will be near a center of each data track of the tape.Type: GrantFiled: December 15, 2021Date of Patent: June 6, 2023Assignee: Western Digital Technologies, Inc.Inventors: Quang Le, Xiaoyong Liu, Hongquan Jiang, Cherngye Hwang, Kuok San Ho, Hisashi Takano
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Publication number: 20230027086Abstract: A spin-orbit torque (SOT) magnetic tunnel junction (MTJ) device includes a substrate, a seed layer over the substrate, and a bismuth antimony (BiSb) layer having (0120) orientation on the seed layer. The seed layer includes a silicide layer and a surface control layer. The silicide layer includes a material of NiSi, NiFeSi, NiFeTaSi, NiCuSi, CoSi, CoFeSi, CoFeTaSi, CoCuSi, or combinations thereof. The surface control layer includes a material of NiFe, NiFeTa, NiTa, NiW, NiFeW, NiCu, NiCuM, NiFeCu, CoTa, CoFeTa, NiCoTa, Co, CoM, CoNiM, CoNi, NiSi, CoSi, NiCoSi, Cu, CuAgM, CuM, or combinations thereof, in which M is Fe, Cu, Co, Ta, Ag, Ni, Mn, Cr, V, Ti, or Si.Type: ApplicationFiled: September 28, 2022Publication date: January 26, 2023Applicant: Western Digital Technologies, Inc.Inventors: Quang LE, Cherngye HWANG, Brian R. YORK, Andrew CHEN, Thao A. NGUYEN, Yongchul AHN, Xiaoyong LIU, Hongquan JIANG, Zheng GAO, Kuok San HO
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Publication number: 20220415345Abstract: The present disclosure relates to read head apparatus, and methods of forming read head apparatus, for magnetic storage devices, such as magnetic tape drives (e.g., tape drives). In one implementation, a read head for magnetic storage devices includes a lower shield, one or more upper shields, one or more lower leads, and a plurality of upper leads. The read head includes a plurality of read sensors, each read sensor of the plurality of read sensors including a first antiferromagnetic (AFM) layer. The read head includes a plurality of soft bias side shields disposed between and outwardly of the plurality of read sensors. The read head includes one or more second AFM layers disposed above the first AFM layer and the plurality of soft bias side shields along a downtrack direction.Type: ApplicationFiled: July 18, 2022Publication date: December 29, 2022Applicant: Western Digital Technologies, Inc.Inventors: Quang LE, Hongquan JIANG, Cherngye HWANG, Hisashi TAKANO
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Patent number: 11514930Abstract: The present disclosure generally relates to magnetic storage devices, such as magnetic tape drives, comprising a read head. The read head comprises a plurality of read sensors disposed between a lower shield and an upper shield. A plurality of soft bias side shields are disposed adjacent to and outwardly of the plurality of read sensors in a cross-track direction. A plurality of hard bias side shields are disposed on and in contact with the soft bias side shields to stabilize the soft bias side shields. Each of the plurality of soft bias side shields are spaced a first distance from the lower shield and each of the hard bias side shields are spaced a second distance from the upper shield, the first distance being substantially equal to the second distance.Type: GrantFiled: June 25, 2021Date of Patent: November 29, 2022Assignee: Western Digital Technologies, Inc.Inventors: Quang Le, Hongquan Jiang, Hisashi Takano, Cherngye Hwang
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Patent number: 11514932Abstract: The present disclosure generally relates to magnetic storage devices, such as magnetic tape drives, comprising a read head. The read head comprises a plurality of read sensors disposed between a lower shield having a first width in a stripe height direction and an upper shield. The plurality of read sensors comprise an antiferromagnetic layer and a free layer comprising a first layer and a second layer. A plurality of soft bias side shields disposed adjacent to and outwardly of the plurality of read sensors in a cross-track direction, each of the plurality of soft bias side shields having a second width in the stripe height direction less than the first width. Each of the plurality of soft bias side shields are spaced a first distance from the lower shield and a second distance from the upper shield, the first distance being substantially equal to the second distance.Type: GrantFiled: June 25, 2021Date of Patent: November 29, 2022Assignee: Western Digital Technologies, Inc.Inventors: Quang Le, Hongquan Jiang, Hisashi Takano, Cherngye Hwang, Xiaoyong Liu
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Patent number: 11514936Abstract: The present disclosure relates to read head apparatus, and methods of forming read head apparatus, for magnetic storage devices, such as magnetic tape drives (e.g., tape drives). In one implementation, a read head for magnetic storage devices includes a lower shield, an upper shield, one or more lower leads, and a plurality of upper leads. The read head includes a plurality of read sensors, each read sensor of the plurality of read sensors including a first antiferromagnetic (AFM) layer. The read head includes a plurality of soft bias side shields disposed between and outwardly of the plurality of read sensors. The read head includes a plurality of second AFM layers disposed below the plurality of soft bias side shields along a downtrack direction.Type: GrantFiled: June 25, 2021Date of Patent: November 29, 2022Assignee: Western Digital Technologies, Inc.Inventors: Quang Le, Hongquan Jiang, Cherngye Hwang, Hisashi Takano
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Patent number: 11489108Abstract: A spin-orbit torque (SOT) magnetic tunnel junction (MTJ) device includes a substrate, a seed layer over the substrate, and a bismuth antimony (BiSb) layer having (0120) orientation on the seed layer. The seed layer includes a silicide layer and a surface control layer. The silicide layer includes a material of NiSi, NiFeSi, NiFeTaSi, NiCuSi, CoSi, CoFeSi, CoFeTaSi, CoCuSi, or combinations thereof. The surface control layer includes a material of NiFe, NiFeTa, NiTa, NiW, NiFeW, NiCu, NiCuM, NiFeCu, CoTa, CoFeTa, NiCoTa, Co, CoM, CoNiM, CoNi, NiSi, CoSi, NiCoSi, Cu, CuAgM, CuM, or combinations thereof, in which M is Fe, Cu, Co, Ta, Ag, Ni, Mn, Cr, V, Ti, or Si.Type: GrantFiled: April 28, 2020Date of Patent: November 1, 2022Assignee: Western Digital Technologies, Inc.Inventors: Quang Le, Cherngye Hwang, Brian R. York, Andrew Chen, Thao A. Nguyen, Yongchul Ahn, Xiaoyong Liu, Hongquan Jiang, Zheng Gao, Kuok San Ho
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Patent number: 11437061Abstract: The present disclosure relates to read head apparatus, and methods of forming read head apparatus, for magnetic storage devices, such as magnetic tape drives (e.g., tape drives). In one implementation, a read head for magnetic storage devices includes a lower shield, one or more upper shields, one or more lower leads, and a plurality of upper leads. The read head includes a plurality of read sensors, each read sensor of the plurality of read sensors including a first antiferromagnetic (AFM) layer. The read head includes a plurality of soft bias side shields disposed between and outwardly of the plurality of read sensors. The read head includes one or more second AFM layers disposed above the first AFM layer and the plurality of soft bias side shields along a downtrack direction.Type: GrantFiled: June 25, 2021Date of Patent: September 6, 2022Assignee: Western Digital Technologies, Inc.Inventors: Quang Le, Hongquan Jiang, Cherngye Hwang, Hisashi Takano
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Patent number: 11393516Abstract: An apparatus is provided that includes an array including m rows and n columns of nodes. Each column of nodes is coupled to one of n first conductive lines, and each row of nodes is coupled to one of m second conductive lines. Each node of the m rows and n columns of nodes includes a spin orbit torque-based spin torque oscillator circuit configured to oscillate at a corresponding intrinsic frequency. The spin orbit torque-based spin torque oscillator circuits are configured to generate m output signals at the m second conductive lines upon application of n input signals to corresponding n first conductive lines. The n input signals correspond to an n-element input vector, and each input signal includes a corresponding input signal frequency. Each of the m output signals include frequency domain components at the input signal frequencies.Type: GrantFiled: February 10, 2021Date of Patent: July 19, 2022Assignee: Western Digital Technologies, Inc.Inventors: Thao A. Nguyen, Michael Ho, Xiaoyong Liu, Zhigang Bai, Zhanjie Li, Quang Le, Yongchul Ahn, Hongquan Jiang
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Publication number: 20220122647Abstract: An apparatus is provided that includes an array including m rows and n columns of nodes. Each column of nodes is coupled to one of n first conductive lines, and each row of nodes is coupled to one of m second conductive lines. Each node of the m rows and n columns of nodes includes a spin orbit torque-based spin torque oscillator circuit configured to oscillate at a corresponding intrinsic frequency. The spin orbit torque-based spin torque oscillator circuits are configured to generate m output signals at the m second conductive lines upon application of n input signals to corresponding n first conductive lines. The n input signals correspond to an n-element input vector, and each input signal includes a corresponding input signal frequency. Each of the m output signals include frequency domain components at the input signal frequencies.Type: ApplicationFiled: February 10, 2021Publication date: April 21, 2022Applicant: Western Digital Technologies, Inc.Inventors: Thao A. Nguyen, Michael Ho, Xiaoyong Liu, Zhigang Bai, Zhanjie Li, Quang Le, Yongchul Ahn, Hongquan Jiang
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Patent number: 11283008Abstract: An apparatus is provided that includes a magnetic tunnel junction, a magnetic assist layer coupled to the magnetic tunnel junction, a non-magnetic layer disposed between the free layer and the magnetic assist layer, and a spin Hall effect layer coupled to the magnetic assist layer. The magnetic tunnel junction includes a free layer in a plane, the free layer including a switchable magnetization direction perpendicular to the plane. The magnetic assist layer includes a magnetization direction parallel to the plane and free to rotate about an axis perpendicular to the plane.Type: GrantFiled: February 10, 2021Date of Patent: March 22, 2022Assignee: Western Digital Technologies, Inc.Inventors: Thao A. Nguyen, Michael Ho, Zhigang Bai, Xiaoyong Liu, Zhanjie Li, Yongchul Ahn, Hongquan Jiang, Quang Le
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Publication number: 20220069202Abstract: An apparatus is provided that includes a magnetic tunnel junction, a magnetic assist layer coupled to the magnetic tunnel junction, a non-magnetic layer disposed between the free layer and the magnetic assist layer, and a spin Hall effect layer coupled to the magnetic assist layer. The magnetic tunnel junction includes a free layer in a plane, the free layer including a switchable magnetization direction perpendicular to the plane. The magnetic assist layer includes a magnetization direction parallel to the plane and free to rotate about an axis perpendicular to the plane.Type: ApplicationFiled: February 10, 2021Publication date: March 3, 2022Applicant: Western Digital Technologies, Inc.Inventors: Thao A. Nguyen, Michael Ho, Zhigang Bai, Xiaoyong Liu, Zhanjie Li, Yongchul Ahn, Hongquan Jiang, Quang Le
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Publication number: 20220044103Abstract: An apparatus is provided that includes an array including n rows and m columns of nodes, each row of nodes coupled to one of n first conductive lines, each column of nodes coupled to one of m second conductive lines, each node of the n rows and m columns of nodes including a spin orbit torque MRAM non-volatile memory cell configured to store a corresponding weight of an n×m array of weights each having a first weight value or a second weight value, and a control circuit configured to apply n input voltages each having a first input value or a second input value to corresponding n first conductive lines, the n input voltages corresponding to an n-element input vector. The spin orbit torque MRAM non-volatile memory cells are configured to generate m output currents at the m second conductive lines upon application of the n input voltages. The m output currents corresponding to a result of multiplying the input vector by the n×m array of weights.Type: ApplicationFiled: February 10, 2021Publication date: February 10, 2022Applicant: Western Digital Technologies, Inc.Inventors: Thao A. Nguyen, Michael Ho, Zhigang Bai, Xiaoyong Liu, Zhanjie Li, Yongchul Ahn, Hongquan Jiang, Quang Le
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Patent number: 11170803Abstract: A magnetic recording write head includes a spin torque oscillator (STO) between a seed layer disposed on a write pole and trailing shield. The seed layer has a cross-track width greater than the width of the STO and a depth in a direction orthogonal to the disk-facing surface of the write pole greater than the depth of the STO. A first insulating refill layer is formed on the sides of the seed layer and STO, and a second insulating refill layer in contact with the first refill layer has a thermal conductivity greater than that of the first refill layer. When current is passing through the STO, the seed layer spreads the current to reduce heating of the write pole and STO, and the bilayer refill material facilitates the transfer of heat away from the write pole and STO.Type: GrantFiled: February 5, 2020Date of Patent: November 9, 2021Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Xiaoyong Liu, Quang Le, Hongquan Jiang, Guangli Liu, Jui-lung Li