Patents by Inventor Jae-Young Yi
Jae-Young Yi 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: 11120933Abstract: A magnetoresistive sensor includes a free layer and a cap over the free layer. The cap includes an upper layer and an insertion layer between the upper layer and the free layer. The insertion layer includes a non-magnetic alloy formed of at least one refractory metal and at least one ferromagnetic metal.Type: GrantFiled: March 29, 2019Date of Patent: September 14, 2021Assignee: SEAGATE TECHNOLOGY LLCInventors: Liwen Tan, Jae-Young Yi, Eric W. Singleton
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Patent number: 10354682Abstract: A data reader may have a magnetoresistive stack with a magnetically free layer decoupled from a first shield by a cap. The cap can have one or more sub-layers respectively configured with a thickness of 4 nm or less as measured parallel to a longitudinal axis of the magnetoresistive stack on an air bearing surface.Type: GrantFiled: June 28, 2018Date of Patent: July 16, 2019Assignee: Seagate Technology LLCInventors: Liwen Tan, ZhiGuo Ge, Shaun E. McKinlay, Jae-Young Yi, Stacey C. Wakeham
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Patent number: 10211034Abstract: A fabrication method that includes cryogenically cooling a multi-layered structure, which includes a barrier layer, in a multi-purpose chamber having a single enclosure around at least one sputtering target and a substrate support. The method also includes depositing a ferromagnetic layer over the barrier layer of the cryogenically cooled multi-layered structure in the single enclosure when the multi-layered structure is supported on the substrate support.Type: GrantFiled: November 21, 2017Date of Patent: February 19, 2019Assignee: Seagate Technology LLCInventors: Jae-Young Yi, Eric W. Singleton
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Patent number: 10147447Abstract: A magnetic stack is disclosed. The magnetic stack includes a magnetically responsive lamination that includes a ferromagnetic free layer, a synthetic antiferromagnetic (SAF) structure, and a spacer layer positioned between the ferromagnetic free layer and the SAF structure. The magnetically responsive lamination is separated from a sensed data bit stored in an adjacent medium by an air bearing surface (ABS). The stack also includes a first antiferromagnetic (AFM) structure coupled to the SAF structure a predetermined offset distance from the ABS, and a second AFM structure that is separated from the first AFM structure by a first shield layer.Type: GrantFiled: March 17, 2016Date of Patent: December 4, 2018Assignee: Seagate Technology LLCInventors: Eric Walter Singleton, Zhiguo Ge, Shaun Eric McKinlay, Jae-Young Yi
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Publication number: 20180308515Abstract: A data reader may have a magnetoresistive stack with a magnetically free layer decoupled from a first shield by a cap. The cap can have one or more sub-layers respectively configured with a thickness of 4 nm or less as measured parallel to a longitudinal axis of the magnetoresistive stack on an air bearing surface.Type: ApplicationFiled: June 28, 2018Publication date: October 25, 2018Inventors: Liwen Tan, ZhiGuo Ge, Shaun E. McKinlay, Jae-Young Yi, Stacey C. Wakeham
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Patent number: 10090008Abstract: Implementations described and claimed herein include a reader structure, comprising a first reader, including a sensor stack and a top shield structure, the top shield structure comprises a synthetic antiferromagnetic shield (SAF) structure, including a reference layer including at least a layer of NiFe and an impurity additive, an RKKY coupling layer RKKY coupling layer (e.g., Ru layer), and a pinned layer. In another implementation, the RL of the SAF shield structure of a first reader includes at least a layer of amorphous magnetic material. Yet, in another implementation, the SAF shield structure includes an insertion layer of amorphous magnetic material under the SAF shield RL, within the SAF shield RL or between the SAF shield RL and SAF shield Ru.Type: GrantFiled: June 23, 2017Date of Patent: October 2, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Zhiguo Ge, Shaun E. McKinlay, Eric W. Singleton, LiWen Tan, Jae Young Yi
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Patent number: 10054649Abstract: A magnetic sensor assembly includes first and second shields each comprised of a magnetic material. The first and second shields define a physical shield-to-shield spacing. A sensor stack is disposed between the first and second shields and includes a seed layer adjacent the first shield, a cap layer adjacent the second shield, and a magnetic sensor between the seed layer and the cap layer. At least a portion of the seed layer and/or the cap layer comprises a magnetic material to provide an effective shield-to-shield spacing of the magnetic sensor assembly that is less than the physical shield-to-shield spacing.Type: GrantFiled: August 16, 2016Date of Patent: August 21, 2018Assignee: Seagate Technology LLCInventors: Eric W. Singleton, Qing He, Jae-Young Yi, Matt Johnson, Zheng Gao, Dimitar V. Dimitrov, Song S. Xue
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Publication number: 20180094347Abstract: A fabrication method that includes cryogenically cooling a multi-layered structure, which includes a barrier layer, in a multi-purpose chamber having a single enclosure around at least one sputtering target and a substrate support. The method also includes depositing a ferromagnetic layer over the barrier layer of the cryogenically cooled multi-layered structure in the single enclosure when the multi-layered structure is supported on the substrate support.Type: ApplicationFiled: November 21, 2017Publication date: April 5, 2018Inventors: Jae-Young Yi, Eric W. Singleton
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Publication number: 20180094346Abstract: A method of making an MgO barrier layer for a TMR sensor, the method including depositing a first Mg layer in a first chamber, depositing a second Mg layer on the first Mg layer using a reactive oxide deposition process in the presence of oxygen in the first chamber or in a second chamber different than the first chamber, depositing a third Mg layer on the second MgO layer in either the first chamber, the second chamber, or a third chamber, and annealing the first layer, the second layer, and the third layer to form an MgO barrier layer.Type: ApplicationFiled: November 30, 2017Publication date: April 5, 2018Inventors: Qing He, Jae Young Yi, Eric W. Singleton
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Patent number: 9928857Abstract: A data reader generally capable of sensing data bits may be configured at least with a magnetic stack that has free and fixed magnetization structures atop a magnetic seed layer. A bottom shield may be positioned contactingly adjacent the magnetic stack opposite a top shield with the bottom shield having a fixed pinning magnetization set to a predetermined magnetic orientation.Type: GrantFiled: July 14, 2015Date of Patent: March 27, 2018Assignee: Seagate Technology LLCInventors: Eric Walter Singleton, Liwen Tan, Jae-Young Yi
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Patent number: 9890449Abstract: A method of making an MgO barrier layer for a TMR sensor, the method including depositing a first Mg layer in a first chamber, depositing a second Mg layer on the first Mg layer using a reactive oxide deposition process in the presence of oxygen in the first chamber or in a second chamber different than the first chamber, depositing a third Mg layer on the second MgO layer in either the first chamber, the second chamber, or a third chamber, and annealing the first layer, the second layer, and the third layer to form an MgO barrier layer.Type: GrantFiled: April 29, 2015Date of Patent: February 13, 2018Assignee: SEAGATE TECHNOLOGY LLCInventors: Qing He, Jae Young Yi, Eric W. Singleton
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Patent number: 9870791Abstract: A multi-sensor reader that includes a first sensor that has a first sensor stack, which includes a sensing layer that has a magnetization that changes according to an external magnetic field. The first sensor also includes a first seed layer below the first sensor stack. The multi-sensor reader also includes a second sensor stacked over the first sensor. The second sensor includes a second sensor stack, which includes a sensing layer that has a magnetization that changes according to the external magnetic field. The second sensor also includes a second seed layer below the second sensor stack. A stabilization element is included to maintain a magnetization direction of the second seed layer and to stabilize the second seed layer.Type: GrantFiled: April 17, 2017Date of Patent: January 16, 2018Assignee: Seagate Technology LLCInventors: Victor Sapozhnikov, Steven P. Bozeman, Mohammed Shariat Ullah Patwari, LiWen Tan, Jae Young Yi, Eric W. Singleton
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Patent number: 9856557Abstract: A fabrication method that includes cryogenically cooling a multi-layered structure, which includes a barrier layer, in a multi-purpose chamber having a single enclosure around at least one sputtering target and a substrate support. The method also includes depositing a ferromagnetic layer over the barrier layer of the cryogenically cooled multi-layered structure in the single enclosure when the multi-layered structure is supported on the substrate support.Type: GrantFiled: January 22, 2016Date of Patent: January 2, 2018Assignee: Seagate Technology LLCInventors: Jae-Young Yi, Eric W. Singleton
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Publication number: 20170294199Abstract: Implementations described and claimed herein include a reader structure, comprising a first reader, including a sensor stack and a top shield structure, the top shield structure comprises a synthetic antiferromagnetic shield (SAF) structure, including a reference layer including at least a layer of NiFe and an impurity additive, an RKKY coupling layer RKKY coupling layer (e.g., Ru layer), and a pinned layer. In another implementation, the RL of the SAF shield structure of a first reader includes at least a layer of amorphous magnetic material. Yet, in another implementation, the SAF shield structure includes an insertion layer of amorphous magnetic material under the SAF shield RL, within the SAF shield RL or between the SAF shield RL and SAF shield Ru.Type: ApplicationFiled: June 23, 2017Publication date: October 12, 2017Inventors: Zhiguo Ge, Shaun E. McKinlay, Eric W. Singleton, LiWen Tan, Jae Young Yi
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Patent number: 9761279Abstract: Various embodiments of a magnetic stack are disclosed. In one or more embodiments, the magnetic stack includes first and second shield layers, and a magnetically responsive lamination disposed between the first and second shield layers. The magnetically responsive lamination can be configured to receive a sense current IS therethrough. The magnetic stack also includes a cooling element disposed between the first and second shield layers and thermally coupled to the magnetically responsive lamination. The cooling element can be configured to receive a bias current IB therethrough. And the cooling element can be configured to cool the magnetically responsive lamination during a read function.Type: GrantFiled: March 24, 2017Date of Patent: September 12, 2017Assignee: Seagate Technology LLCInventors: David Deen, Eric Singleton, Vasudevan Ramaswamy, Mohammed Patwari, Taras Pokhil, Jae-Young Yi
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Publication number: 20170221506Abstract: A data reader may have a magnetoresistive stack with a magnetically free layer decoupled from a first shield by a cap. The cap can have one or more sub-layers respectively configured with a thickness of 4 nm or less as measured parallel to a longitudinal axis of the magnetoresistive stack on an air bearing surface.Type: ApplicationFiled: February 2, 2016Publication date: August 3, 2017Inventors: Liwen Tan, ZhiGuo Ge, Shaun E. McKinlay, Jae-Young Yi, Stacey C. Wakeham
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Patent number: 9720053Abstract: Implementations described and claimed herein provide a system comprising an external magnetic field generator, wherein the external field magnetic field generator is configured to rock an effective annealing magnetic field between a first positive angle and a second negative angle compared to a desired pinning field orientation in an AFM/PL structure.Type: GrantFiled: August 31, 2015Date of Patent: August 1, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Konstantin Nikolaev, Victor Sapozhnikov, Taras Pokhil, Jae-Young Yi, Mohammed Patwari, Eric W. Singleton
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Patent number: 9704517Abstract: A magnetoresistive (MR) sensor including a synthetic antiferromagnetic (SAF) structure that is magnetically coupled to a side shield element. The SAF structure includes at least one magnetic amorphous layer that is an alloy of a ferromagnetic material and a refractory material. The amorphous magnetic layer may be in contact with a non-magnetic layer and antiferromagnetically coupled to a layer in contact with an opposite surface of the non-magnetic layer.Type: GrantFiled: December 8, 2015Date of Patent: July 11, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Eric W. Singleton, Liwen Tan, Jae-Young Yi
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Patent number: 9685177Abstract: A multi-sensor reader that includes a first sensor that has a sensing layer with a magnetization that changes according to an external magnetic field. The first sensor also includes first and second side biasing magnets having a magnetization substantially along a first direction. The first and second side biasing magnets align the magnetization of the sensing layer substantially along the first direction when the sensing layer is not substantially influenced by the external magnetic field. The multi-sensor reader further includes a second sensor that is stacked over the first sensor. The second sensor includes a reference layer that has a magnetization that is set substantially along a second direction.Type: GrantFiled: July 8, 2015Date of Patent: June 20, 2017Assignee: Seagate Technology LLCInventors: Zhiguo Ge, Shaun E. Mckinlay, Eric W. Singleton, LiWen Tan, Jae Young Yi
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Patent number: 9659585Abstract: A magnetic sensor has a bottom shield layer, an upper shield layer, and a sensor stack adjacent the upper shield layer. The sensor includes a seed layer between the bottom shield layer and an antiferromagnetic layer of the sensor stack. The seed layer has a magnetic layer adjacent the sensor stack and a nonmagnetic layer adjacent the bottom shield layer.Type: GrantFiled: December 15, 2011Date of Patent: May 23, 2017Assignee: SEAGATE TECHNOLOGY LLCInventors: Eric Walter Singleton, Antonia Tsoukatos, Liwen Tan, Jae-Young Yi