Patents by Inventor Qunwen Leng
Qunwen Leng 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: 11297441Abstract: The present disclosure discloses a microphone, comprising: a first substrate, the first substrate having an inner cavity open at one end, wherein the microphone further comprises a vibration diaphragm and at least one cantilever which are provided to the first substrate and suspended above the inner cavity. The cantilever is separated from the vibration diaphragm by a spacing portion, and the vibration diaphragm and the inner cavity of the first substrate define an acoustically sealed cavity; and a detection structure is provided to the vibration diaphragm and the cantilever. The structural design of the cantilever is adopted, so that the space between the vibration diaphragm and the cantilever is open, the airflow can smoothly pass by the cantilever, and further the signal-to-noise ratio of the microphone can be greatly improved.Type: GrantFiled: September 6, 2018Date of Patent: April 5, 2022Assignees: Goertek, Inc., Qingdao Research Institute of Beihang UniverityInventors: Quanbo Zou, Qunwen Leng, Zhe Wang
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Patent number: 11102586Abstract: An MEMS microphone is provided, comprising a first substrate and a vibration diaphragm supported above the first substrate by a spacing portion, the first substrate, the spacing portion, and the vibration diaphragm enclosing a vacuum chamber, and a static deflection distance of the vibration diaphragm under an atmospheric pressure being less than a distance between the vibration diaphragm and the first substrate, wherein: one of the vibration diaphragm and the first substrate is provided with a magnetic film, and the other one of the vibration diaphragm and the first substrate is provided with a magnetoresistive sensor cooperating with the magnetic film, the magnetoresistive sensor being configured to sense a change in a magnetic field of the magnetic film during a vibration of the vibration diaphragm and output a varying electrical signal.Type: GrantFiled: September 6, 2018Date of Patent: August 24, 2021Assignee: Weifang Goertek Microelectronics Co., Ltd.Inventors: Quanbo Zou, Qunwen Leng, Zhe Wang
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Publication number: 20200267480Abstract: An MEMS microphone is provided, comprising a first substrate and a vibration diaphragm supported above the first substrate by a spacing portion, the first substrate, the spacing portion, and the vibration diaphragm enclosing a vacuum chamber, and a static deflection distance of the vibration diaphragm under an atmospheric pressure being less than a distance between the vibration diaphragm and the first substrate, wherein: one of the vibration diaphragm and the first substrate is provided with a magnetic film, and the other one of the vibration diaphragm and the first substrate is provided with a magnetoresistive sensor cooperating with the magnetic film, the magnetoresistive sensor being configured to sense a change in a magnetic field of the magnetic film during a vibration of the vibration diaphragm and output a varying electrical signal.Type: ApplicationFiled: September 6, 2018Publication date: August 20, 2020Applicants: Goertek, Inc., Qingdao Research Institute of Beihang UniversityInventors: Quanbo Zou, Qunwen Leng, Zhe Wang
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Publication number: 20200236471Abstract: The present disclosure discloses a microphone, comprising: a first substrate, the first substrate having an inner cavity open at one end, wherein the microphone further comprises a vibration diaphragm and at least one cantilever which are provided to the first substrate and suspended above the inner cavity. The cantilever is separated from the vibration diaphragm by a spacing portion, and the vibration diaphragm and the inner cavity of the first substrate define an acoustically sealed cavity; and a detection structure is provided to the vibration diaphragm and the cantilever. The structural design of the cantilever is adopted, so that the space between the vibration diaphragm and the cantilever is open, the airflow can smoothly pass by the cantilever, and further the signal-to-noise ratio of the microphone can be greatly improved.Type: ApplicationFiled: September 6, 2018Publication date: July 23, 2020Applicants: Goertek Inc., Qingdao Research Institute of Beihang UniversityInventors: Quanbo Zou, Qunwen Leng, Zhe Wang
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Patent number: 10242700Abstract: A method and system provide a magnetic read apparatus. The magnetic read apparatus includes a read sensor. The read sensor includes a pinning layer, a nonmagnetic insertion layer and a pinned layer. The nonmagnetic insertion layer has a location selected from a first location and a second location. The first location is between the pinned layer and the pinning layer. The second location is within the pinning layer.Type: GrantFiled: November 20, 2017Date of Patent: March 26, 2019Assignee: Western Digital (Fremont), LLCInventors: Joshua Jones, Christian Kaiser, Yuankai Zheng, Qunwen Leng
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Patent number: 10121501Abstract: A magnetic read apparatus includes a read sensor, a shield structure and a side magnetic bias structure. The read sensor includes a free layer having a side and a nonmagnetic spacer layer. The shield structure includes a shield pinning structure and a shield reference structure. The nonmagnetic spacer layer is between the shield reference structure and the free layer. The shield reference structure is between the shield pinning structure and the nonmagnetic spacer layer. The shield pinning structure includes a pinned magnetic moment in a first direction. The shield reference structure includes a shield reference structure magnetic moment weakly coupled with the pinned magnetic moment. The side magnetic bias structure is adjacent to the side of the free layer.Type: GrantFiled: May 17, 2017Date of Patent: November 6, 2018Assignee: Western Digital (Fremont), LLCInventors: Gerardo A. Bertero, Shaoping Li, Qunwen Leng, Yuankai Zheng, Rongfu Xiao, Ming Mao, Shihai He, Miaoyin Wang
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Patent number: 10008219Abstract: Apparatuses and methods of recording read heads with a multi-layer anti-ferromagnetic (AFM) layer are provided. The AFM layer has gradient Manganese (Mn) compositions. A multi-layer AFM layer comprises a plurality of sub-layers having different Mn compositions. An upper sub-layer has a higher Mn composition than an lower sub-layer. Different types of gases may be used to deposit each sub-layer and the flow of each gas may be adjusted.Type: GrantFiled: May 12, 2016Date of Patent: June 26, 2018Assignee: Western Digital (Fremont), LLCInventors: Yuankai Zheng, Qunwen Leng
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Publication number: 20180075869Abstract: A method and system provide a magnetic read apparatus. The magnetic read apparatus includes a read sensor. The read sensor includes a pinning layer, a nonmagnetic insertion layer and a pinned layer. The nonmagnetic insertion layer has a location selected from a first location and a second location. The first location is between the pinned layer and the pinning layer. The second location is within the pinning layer.Type: ApplicationFiled: November 20, 2017Publication date: March 15, 2018Inventors: Joshua JONES, Christian Kaiser, Yuankai Zheng, Qunwen Leng
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Patent number: 9858951Abstract: A method provides a read sensor stack including an antiferromagnetic (AFM) layer, a pinned layer on the AFM layer, a free layer, and a nonmagnetic layer between the free and pinned layers. Providing the AFM layer includes depositing an AFM layer first portion at a first elevated temperature and at a rate of at least 0.1 Angstrom/second. This AFM layer first portion is annealed in-situ at at least one hundred degrees Celsius. An AFM sublayer is deposited at an elevated temperature and at a sublayer deposition rate of less than 0.1 Angstrom/second. The already-deposited portion of the AFM layer is annealed in-situ at at least one hundred degrees Celsius and less than five hundred degrees Celsius. The sublayer depositing and annealing steps may be repeated in order at least once to provide an AFM layer second portion that has multiple sublayers and is thinner than the AFM layer first portion.Type: GrantFiled: December 1, 2015Date of Patent: January 2, 2018Assignee: WESTERN DIGITAL (FREMONT), LLCInventors: Yuankai Zheng, Qunwen Leng, Xin Jiang, Zhitao Diao, Christian Kaiser
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Patent number: 9842615Abstract: A method and system provide a magnetic read apparatus. The magnetic read apparatus includes a read sensor. The read sensor includes a pinning layer, a nonmagnetic insertion layer and a pinned layer. The nonmagnetic insertion layer has a location selected from a first location and a second location. The first location is between the pinned layer and the pinning layer. The second location is within the pinning layer.Type: GrantFiled: June 26, 2015Date of Patent: December 12, 2017Assignee: Western Digital (Fremont), LLCInventors: Joshua Jones, Christian Kaiser, Yuankai Zheng, Qunwen Leng
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Patent number: 9830936Abstract: A tunnel magnetoresistance (TMR) read sensor having a tabbed AFM layer and an extended pinned layer and methods for making the same are provided. The TMR read sensor has an AFM layer recessed from the air bearing surface, providing a reduced shield-to-shield distance.Type: GrantFiled: November 17, 2015Date of Patent: November 28, 2017Assignee: WESTERN DIGITAL (FREMONT), LLCInventors: Shaoping Li, Yuankai Zheng, Gerardo A. Bertero, Qunwen Leng, Michael L. Mallary, Rongfu Xiao, Ming Mao, Zhihong Zhang, Anup G. Roy, Chen Jung Chien, Zhitao Diao, Ling Wang
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Patent number: 9786301Abstract: Apparatuses and methods for providing thin shields in a multiple sensor array are provided. One such apparatus is a magnetic read transducer including a first read sensor, a second read sensor, and a shield assembly positioned between the first read sensor and the second read sensor at an air bearing surface (ABS) of the magnetic read transducer, the shield assembly including a first shield layer assembly having a first footprint with a first area, and a second shield layer assembly having a second footprint with a second area, where the second area is greater than the first area.Type: GrantFiled: December 2, 2014Date of Patent: October 10, 2017Assignee: WESTERN DIGITAL (FREMONT), LLCInventors: Shaoping Li, Gerardo A. Bertero, Steven C. Rudy, Shihai He, Ming Mao, Haiwen Xi, Srikanth Ganesan, Qunwen Leng, Ge Yi, Rongfu Xiao, Feng Liu, Lei Wang
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Publication number: 20170249959Abstract: A magnetic read apparatus includes a read sensor, a shield structure and a side magnetic bias structure. The read sensor includes a free layer having a side and a nonmagnetic spacer layer. The shield structure includes a shield pinning structure and a shield reference structure. The nonmagnetic spacer layer is between the shield reference structure and the free layer. The shield reference structure is between the shield pinning structure and the nonmagnetic spacer layer. The shield pinning structure includes a pinned magnetic moment in a first direction. The shield reference structure includes a shield reference structure magnetic moment weakly coupled with the pinned magnetic moment. The side magnetic bias structure is adjacent to the side of the free layer.Type: ApplicationFiled: May 17, 2017Publication date: August 31, 2017Inventors: GERARDO A. BERTERO, Shaoping LI, Qunwen LENG, YUANKAI ZHENG, Rongfu XIAO, MING MAO, SHIHAI HE, Miaoyin WANG
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Patent number: 9715889Abstract: A magnetic read apparatus has a media-facing surface (MFS) and includes a read sensor, a magnetic bias structure and an insulating layer. The read sensor has a side, a front occupying part of the MFS and a back. The read sensor includes a free layer, a pinned layer and a barrier layer between the free and pinned layers. The barrier layer has a barrier layer coefficient of thermal expansion. The magnetic bias structure is adjacent to the side of the free layer. The insulating layer includes first and second portions. The first portion of the insulating layer is between the read sensor side and the magnetic bias structure. The second portion of the insulating layer adjoins the read sensor back. The insulating layer has an insulating layer coefficient of thermal expansion that is at least ? of and not more than 5/3 of the barrier layer coefficient of thermal expansion.Type: GrantFiled: August 18, 2016Date of Patent: July 25, 2017Assignee: Western Digital (Fremont), LLCInventors: Shaoping Li, Gerardo A. Bertero, Ming Mao, Shihai He, Steven C. Rudy, Haiwen Xi, Zhipeng Li, Haifeng Wang, Jianxin Fang, Zhihong Zhang, Yingbo Zhang, Qunwen Leng, Christopher L. Beaudry, Ruisheng Liu
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Patent number: 9705072Abstract: A spin transfer torque magnetic junction includes a magnetic reference layer structure with magnetic anisotropy perpendicular to a substrate plane. A laminated magnetic free layer comprises at least three sublayers (e.g. sub-layers of CoFeB, CoPt, FePt, or CoPd) having magnetic anisotropy perpendicular to the substrate plane. Each such sublayer is separated from an adjacent one by a dusting layer (e.g. tantalum). An insulative barrier layer (e.g. MgO) is disposed between the laminated free layer and the magnetic reference layer structure. The spin transfer torque magnetic junction includes conductive base and top electrodes, and a current polarizing structure that has magnetic anisotropy parallel to the substrate plane. In certain embodiments, the current polarizing structure may also include a non-magnetic spacer layer (e.g. MgO, copper, etc).Type: GrantFiled: January 12, 2016Date of Patent: July 11, 2017Assignee: WESTERN DIGITAL (FREMONT), LLCInventors: Shaoping Li, Gerardo A. Bertero, Yuankai Zheng, Qunwen Leng, Shihai He, Yunfei Ding, Ming Mao, Abhinandan Chougule, Daniel K. Lottis
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Patent number: 9666214Abstract: A magnetic read apparatus includes a read sensor, a shield structure and a side magnetic bias structure. The read sensor includes a free layer having a side and a nonmagnetic spacer layer. The shield structure includes a shield pinning structure and a shield reference structure. The nonmagnetic spacer layer is between the shield reference structure and the free layer. The shield reference structure is between the shield pinning structure and the nonmagnetic spacer layer. The shield pinning structure includes a pinned magnetic moment in a first direction. The shield reference structure includes a shield reference structure magnetic moment weakly coupled with the pinned magnetic moment. The side magnetic bias structure is adjacent to the side of the free layer.Type: GrantFiled: September 23, 2015Date of Patent: May 30, 2017Assignee: WESTERN DIGITAL (FREMONT), LLCInventors: Gerardo A. Bertero, Shaoping Li, Qunwen Leng, Yuankai Zheng, Rongfu Xiao, Ming Mao, Shihai He, Miaoyin Wang
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Patent number: 9508365Abstract: A magnetic read apparatus has an air-bearing surface (ABS) and includes a shield, a crystal decoupling structure on the shield and a read sensor on the crystal decoupling structure. The crystal decoupling structure includes at least one of a magnetic high crystalline temperature amorphous alloy layer and a combination of a high crystalline temperature amorphous layer and an amorphous magnetic layer. The high crystalline temperature amorphous layer has a crystalline temperature of at least three hundred degrees Celsius. The amorphous magnetic layer is amorphous as-deposited.Type: GrantFiled: June 24, 2015Date of Patent: November 29, 2016Assignee: WESTERN DIGITAL (FREMONT), LLC.Inventors: Yuankai Zheng, Qunwen Leng, Xin Jiang, Tong Zhao, Zhitao Diao, Christian Kaiser, Zhipeng Li, Jianxin Fang
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Publication number: 20160260447Abstract: Apparatuses and methods of recording read heads with a multi-layer anti-ferromagnetic (AFM) layer are provided. The AFM layer has gradient Manganese (Mn) compositions. A multi-layer AFM layer comprises a plurality of sub-layers having different Mn compositions. An upper sub-layer has a higher Mn composition than an lower sub-layer. Different types of gases may be used to deposit each sub-layer and the flow of each gas may be adjusted.Type: ApplicationFiled: May 12, 2016Publication date: September 8, 2016Inventors: YUANKAI ZHENG, QUNWEN LENG
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Patent number: 9431032Abstract: A method and system provide a magnetic transducer including first and second read sensors, a shield and a conductive via. The shield is between the first and second read sensors. The magnetic transducer also includes first and second read shields. The shield has a top surface and a bottom surface opposite to the top surface. The bottom surface faces the first read sensor. The conductive via is isolated from the first read shield and the second read shield. The conductive via provides electrical contact to the shield and is electrically connected to the bottom surface of the shield.Type: GrantFiled: October 4, 2013Date of Patent: August 30, 2016Assignee: WESTERN DIGITAL (FREMONT), LLCInventors: Shaoping Li, Steven C. Rudy, Ge Yi, Gerardo A. Bertero, Qunwen Leng, Ming Mao
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Patent number: 9431039Abstract: A method and system provide a magnetic transducer including a first shield, a plurality of read sensors, and a second shield. The read sensors are between the first shield and the second shield. The read sensors have a plurality of widths in a track width direction and are separated by at least one distance in a down track direction. The down track direction is perpendicular to the track width direction.Type: GrantFiled: June 27, 2013Date of Patent: August 30, 2016Assignee: WESTERN DIGITAL (FREMONT), LLCInventors: Shaoping Li, Gerardo A. Bertero, Ge Yi, Michael L. Mallary, Qunwen Leng, Eric J. Champion