Patents by Inventor Ning Shi
Ning Shi 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: 12253486Abstract: A gas-sensitive material, a preparation method therefore and an application thereof, and a gas sensor using the gas-sensitive material are provided. The gas-sensitive material is a carbon material-metal oxide composite nanomaterial formed by compounding a carbon material and metal oxides. The content of the carbon material is 0.5˜20 wt. % and the content of the metal oxides is 80˜99.5 wt. %; the metal oxides contain tungsten oxide and one or more selected from tin oxide, iron oxide, titanium oxide, copper oxide, molybdenum oxide, and zinc oxide; the metal oxides are formed on the carbon material in the form of nanowires, and the nanowires are tungsten oxide-doped nanowires. The gas-sensitive material has reduced resistance, is capable of responding to various gases at a reduced working temperature.Type: GrantFiled: January 26, 2021Date of Patent: March 18, 2025Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, SINOPEC RESEARCH INSTITUTE OF SAFETY ENGINEERING CO., LTD.Inventors: Fei An, Bing Sun, Na Li, Lin Wang, Ning Shi, Wei Xu, Shucai Zhang, Haozhi Wang, Shiqiang Wang, Junjie Feng, Chenyang Zhao
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Publication number: 20250065313Abstract: A titanium silicalite molecular sieve has a micropore specific surface area of 320-500 m2/g, a micropore volume of 0.1-0.4 cm3/g, a mesopore specific surface area of 50-100 m2/g, a mesopore volume of 0.075-0.1 cm3/g, and a particle size of 100-250 nm. Its micropore specific surface area accounts for 50-90% of the total specific surface area. A catalyst contains the titanium silicalite molecular sieve carrier and is loaded with nano-gold particles. The catalyst has a micropore volume of 0.06-0.4 cm3/g and a particle size of 100-250 nm. The catalyst is prepared by subjecting the titanium silicalite molecular sieve to an alkaline treatment with an aqueous aliphatic amine solution and then loading same with nano-gold particles. The catalyst is used for an olefin epoxidation reaction, a cycloolefin epoxidation reaction, a phenol hydroxylation reaction, and a cyclohexanone ammoximation reaction.Type: ApplicationFiled: November 22, 2022Publication date: February 27, 2025Inventors: Yujia LIU, Chenyang ZHAO, Hongwei ZHU, Bing SUN, Ning SHI, Wei XU
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Publication number: 20240290777Abstract: A bidirectional transient voltage suppressor (TVS) protection circuit includes two sets of steering diodes with a clamp device merged with a steering diode in each set. In one embodiment, the protection circuit includes a first high-side diode integrated with a first silicon controlled rectifier (SCR), a first low-side diode, a second high-side diode integrated with a second SCR, and a second low-side diode. In another embodiment, the protection circuit includes a first high-side diode, a first low-side diode integrated with a first SCR, a second high-side diode, and a second low-side diode integrated with a second SCR. In some embodiments, the TVS protection circuit realizes low capacitance at the protected nodes by fully or almost completely depleting the P-N junction connected to the protected nodes in the operating voltage range.Type: ApplicationFiled: May 4, 2024Publication date: August 29, 2024Inventors: Shekar Mallikarjunaswamy, Ning Shi
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Publication number: 20240282333Abstract: Aspects of the present disclosure generally relate to magnetic recording heads (such as write heads of data storage devices) that include multilayer structures to facilitate targeted switching and relatively low coercivity. In one or more embodiments, a magnetic recording head includes an iron-cobalt (FeCo) layer having a crystalline structure that is a cubic lattice structure, a first crystalline layer formed of a first material, and a second crystalline layer between the first crystalline layer and the FeCo layer. The second crystalline layer is formed of a second material different from the first material, and the second crystalline layer interfaces both the FeCo layer and the first crystalline layer. The crystalline structure of the FeCo layer has a texture of <100>.Type: ApplicationFiled: April 17, 2024Publication date: August 22, 2024Applicant: Western Digital Technologies, Inc.Inventors: Ning SHI, Brian R. YORK, Susumu OKAMURA, Suping SONG
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Patent number: 11990467Abstract: A bidirectional transient voltage suppressor (TVS) protection circuit includes two sets of steering diodes, a clamp circuit including an MOS transistor integrated with a silicon controlled rectifier (SCR) and a trigger circuit. In response to a voltage applied to one of the protected nodes exceeding a first voltage level, the trigger circuit drives the MOS transistor to cause a current flow at the SCR to trigger an SCR action and the SCR clamps the voltage at the respective protected node at a clamping voltage. In other embodiments, a bidirectional transient voltage suppressor (TVS) protection circuit includes two sets of steering diodes with a clamp device merged with a steering diode in each set. In some embodiments, the TVS protection circuit realizes low capacitance at the protected nodes by fully or almost completely depleting the P-N junction connected to the protected nodes in the operating voltage range.Type: GrantFiled: September 14, 2022Date of Patent: May 21, 2024Assignee: Alpha and Omega Semiconductor (Cayman) Ltd.Inventors: Shekar Mallikarjunaswamy, Ning Shi
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Patent number: 11990163Abstract: Aspects of the present disclosure generally relate to magnetic recording heads (such as write heads of data storage devices) that include multilayer structures to facilitate targeted switching and relatively low coercivity. In one or more embodiments, a magnetic recording head includes an iron-cobalt (FeCo) layer having a crystalline structure that is a cubic lattice structure, a first crystalline layer formed of a first material, and a second crystalline layer between the first crystalline layer and the FeCo layer. The second crystalline layer is formed of a second material different from the first material, and the second crystalline layer interfaces both the FeCo layer and the first crystalline layer. The crystalline structure of the FeCo layer has a texture of <100>.Type: GrantFiled: June 30, 2022Date of Patent: May 21, 2024Assignee: Western Digital Technologies, Inc.Inventors: Ning Shi, Brian R. York, Susumu Okamura, Suping Song
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Publication number: 20240005951Abstract: Aspects of the present disclosure generally relate to magnetic recording heads (such as write heads of data storage devices) that include multilayer structures to facilitate targeted switching and relatively low coercivity. In one or more embodiments, a magnetic recording head includes an iron-cobalt (FeCo) layer having a crystalline structure that is a cubic lattice structure, a first crystalline layer formed of a first material, and a second crystalline layer between the first crystalline layer and the FeCo layer. The second crystalline layer is formed of a second material different from the first material, and the second crystalline layer interfaces both the FeCo layer and the first crystalline layer. The crystalline structure of the FeCo layer has a texture of <100>.Type: ApplicationFiled: June 30, 2022Publication date: January 4, 2024Applicant: Western Digital Technologies, Inc.Inventors: Ning SHI, Brian R. YORK, Susumu OKAMURA, Suping SONG
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Publication number: 20230339833Abstract: A method and system for preparing epoxypropane by direct epoxidation of propylene includes the steps of subjecting a mixed gas of a first feed gas and a second feed gas to a contact reaction with a catalyst under reaction conditions of propylene epoxidation to prepare epoxypropane. The first feed gas contains oxygen gas and is free or substantially free of hydrogen gas. The second feed gas contains hydrogen gas and is free or substantially free of oxygen gas. The first feed gas and/or the second feed gas contain propylene, at least one of the first feed gas and the second feed gas further contains a diluent gas. The method can be used for reducing dosage of diluent gas, preferably recycling the tail gas, thereby significantly increasing the conversion rate of propylene without compromising the service life of catalyst.Type: ApplicationFiled: January 26, 2021Publication date: October 26, 2023Inventors: Bing SUN, Chenyang ZHAO, Zhe YANG, Hongwei ZHU, Lin WANG, Jie JIANG, Ning SHI, Na LI, Shiqiang WANG, Haozhi WANG
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Patent number: 11691119Abstract: Described are a low temperature plasma reaction device and a hydrogen sulfide decomposition method. The reaction device includes: a first cavity; a second cavity, the second cavity being embedded inside or outside the first cavity; an inner electrode, the inner electrode being arranged in the first cavity; an outer electrode; and a barrier dielectric arranged between the outer electrode and the inner electrode. The hydrogen sulfide decomposition method includes: implementing dielectric barrier discharge at the outer electrode and the inner electrode of the low temperature plasma reaction device, introducing a raw material gas containing hydrogen sulfide into the first cavity to implement a hydrogen sulfide decomposition method, and continuously introducing a thermally conductive medium into the second cavity in order to control the temperature of the first cavity of the low temperature plasma reaction device.Type: GrantFiled: January 31, 2019Date of Patent: July 4, 2023Assignees: CHINA PETROLEUM & CHEMICAL CORPORATION, CHINA PETROLEUM & CHEMICAL CORPORATION QINGDAO RESEARCH INSTITUTE OF SAFETY ENGINEERINGInventors: Jing Zhang, Shanjun Mu, Wei Xu, Ning Shi, Shucai Zhang, Guosheng Dong, Tie Zhang, Lin Wang, Junpeng Ren, Feng Sun
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Publication number: 20230159365Abstract: The invention relates to a system for reducing the hardness of a water body. According to the system, the acidic water body near a filter element anode is continuously extracted in the electrolytic process, the effect of acid-alkali separation can be achieved without internally disposing an ion exchange membrane, acid-alkali mixing generated by electrodes slows down, the alkaline atmosphere of a cathode chamber is kept, and a good environment is provided for generation of calcium carbonate seed crystals; and meanwhile, the acidic water body extracted near the anode of an electrochemical electrolysis unit can be used for regenerating ion exchange resin in an ion exchange column, so that resources are fully utilized.Type: ApplicationFiled: December 12, 2021Publication date: May 25, 2023Inventors: Bo JIANG, Xuchen BA, Xuesong WANG, Jinghua CHEN, Lihua QI, Xiaobin GUO, Ning SHI, Yijie LIU, Juan WANG
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Publication number: 20230124633Abstract: A gas-sensitive material, a preparation method therefore and an application thereof, and a gas sensor using the gas-sensitive material are provided. The gas-sensitive material is a carbon material-metal oxide composite nanomaterial formed by compounding a carbon material and metal oxides. The content of the carbon material is 0.5˜20 wt. % and the content of the metal oxides is 80˜99.5 wt. %; the metal oxides contain tungsten oxide and one or more selected from tin oxide, iron oxide, titanium oxide, copper oxide, molybdenum oxide, and zinc oxide; the metal oxides are formed on the carbon material in the form of nanowires, and the nanowires are tungsten oxide-doped nanowires. The gas-sensitive material has reduced resistance, is capable of responding to various gases at a reduced working temperature.Type: ApplicationFiled: January 26, 2021Publication date: April 20, 2023Inventors: Fei AN, Bing SUN, Na LI, Lin WANG, Ning SHI, Wei XU, Shucai ZHANG, Haozhi WANG, Shiqiang WANG, Junjie FENG, Chenyang ZHAO
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Publication number: 20230050292Abstract: A bidirectional transient voltage suppressor (TVS) protection circuit includes two sets of steering diodes, a clamp circuit including an MOS transistor integrated with a silicon controlled rectifier (SCR) and a trigger circuit. In response to a voltage applied to one of the protected nodes exceeding a first voltage level, the trigger circuit drives the MOS transistor to cause a current flow at the SCR to trigger an SCR action and the SCR clamps the voltage at the respective protected node at a clamping voltage. In other embodiments, a bidirectional transient voltage suppressor (TVS) protection circuit includes two sets of steering diodes with a clamp device merged with a steering diode in each set. In some embodiments, the TVS protection circuit realizes low capacitance at the protected nodes by fully or almost completely depleting the P-N junction connected to the protected nodes in the operating voltage range.Type: ApplicationFiled: September 14, 2022Publication date: February 16, 2023Inventors: Shekar Mallikarjunaswamy, Ning Shi
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Patent number: 11462532Abstract: A bidirectional transient voltage suppressor (TVS) circuit for data pins of electronic devices includes two sets of steering diodes and a diode triggered clamp device in some embodiment. In other embodiments, a bidirectional transient voltage suppressor (TVS) circuit for data pins of electronic devices includes two sets of steering diodes with a clamp device merged with a steering diode in each set. The TVS circuit is constructed to realize low capacitance at the protected nodes and improved clamping voltage for robust protection against surge evens. In some embodiments, the TVS circuit realizes low capacitance at the protected nodes by fully or almost completely depleting the P-N junction connected to the protected nodes in the operating voltage range. In this manner, the TVS circuit does not present undesirable parasitic capacitance to the data pins being protected, especially when the data pins are applied in high speed applications.Type: GrantFiled: January 13, 2021Date of Patent: October 4, 2022Assignee: Alpha and Omega Semiconductor (Cayman) Ltd.Inventors: Shekar Mallikarjunaswamy, Ning Shi
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Publication number: 20210159223Abstract: A bidirectional transient voltage suppressor (TVS) circuit for data pins of electronic devices includes two sets of steering diodes and a diode triggered clamp device in some embodiment. In other embodiments, a bidirectional transient voltage suppressor (TVS) circuit for data pins of electronic devices includes two sets of steering diodes with a clamp device merged with a steering diode in each set. The TVS circuit is constructed to realize low capacitance at the protected nodes and improved clamping voltage for robust protection against surge evens. In some embodiments, the TVS circuit realizes low capacitance at the protected nodes by fully or almost completely depleting the P-N junction connected to the protected nodes in the operating voltage range. In this manner, the TVS circuit does not present undesirable parasitic capacitance to the data pins being protected, especially when the data pins are applied in high speed applications.Type: ApplicationFiled: January 13, 2021Publication date: May 27, 2021Inventors: Shekar Mallikarjunaswamy, Ning Shi
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Patent number: 10937780Abstract: A bidirectional transient voltage suppressor (TVS) circuit for data pins of electronic devices includes two sets of steering diodes and a diode triggered clamp device in some embodiment. In other embodiments, a bidirectional transient voltage suppressor (TVS) circuit for data pins of electronic devices includes two sets of steering diodes with a clamp device merged with a steering diode in each set. The TVS circuit is constructed to realize low capacitance at the protected nodes and improved clamping voltage for robust protection against surge evens. In some embodiments, the TVS circuit realizes low capacitance at the protected nodes by fully or almost completely depleting the P-N junction connected to the protected nodes in the operating voltage range. In this manner, the TVS circuit does not present undesirable parasitic capacitance to the data pins being protected, especially when the data pins are applied in high speed applications.Type: GrantFiled: June 20, 2019Date of Patent: March 2, 2021Assignee: Alpha and Omega Semiconductor (Cayman) Ltd.Inventors: Shekar Mallikarjunaswamy, Ning Shi
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Publication number: 20200398245Abstract: Described are a low temperature plasma reaction device and a hydrogen sulfide decomposition method. The reaction device includes: a first cavity; a second cavity, the second cavity being embedded inside or outside the first cavity; an inner electrode, the inner electrode being arranged in the first cavity; an outer electrode; and a barrier dielectric arranged between the outer electrode and the inner electrode. The hydrogen sulfide decomposition method includes: implementing dielectric barrier discharge at the outer electrode and the inner electrode of the low temperature plasma reaction device, introducing a raw material gas containing hydrogen sulfide into the first cavity to implement a hydrogen sulfide decomposition method, and continuously introducing a thermally conductive medium into the second cavity in order to control the temperature of the first cavity of the low temperature plasma reaction device.Type: ApplicationFiled: January 31, 2019Publication date: December 24, 2020Applicants: CHINA PETROLEUM & CHEMICAL CORPORATION, CHINA PETROLEUM & CHEMICAL CORPORATION QINGDAO RESEARCH INSTITUTE OF SAFEY ENGENEERINGInventors: Jing ZHANG, Shanjun MU, Wei XU, Ning SHI, Shucai ZHANG, Guosheng DONG, Tie ZHANG, Lin WANG, Junpeng REN, Feng SUN
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Patent number: 10762918Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a trailing shield, a main pole, a MAMR stack disposed between the trailing shield and the main pole, side shields surrounding at least a portion of the main pole, and a structure disposed between the side shields and the main pole at a media facing surface (MFS). The structure is fabricated from a material that is thermally conductive and electrically insulating/dissipative. The material has a thermal conductivity of at least 50 W/(m*K) and an electrical resistivity of at least 105 ?*m. The structure helps dissipate joule heating generated from either the main pole or the MAMR stack into surrounding area without electrical shunting, leading to reduced heating or break-down induced failures.Type: GrantFiled: March 24, 2020Date of Patent: September 1, 2020Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Quang Le, Hongquan Jiang, Ning Shi, Alexander M. Zeltser
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Publication number: 20200227075Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a trailing shield, a main pole, a MAMR stack disposed between the trailing shield and the main pole, side shields surrounding at least a portion of the main pole, and a structure disposed between the side shields and the main pole at a media facing surface (MFS). The structure is fabricated from a material that is thermally conductive and electrically insulating/dissipative. The material has a thermal conductivity of at least 50 W/(m*K) and an electrical resistivity of at least 105 ?*m. The structure helps dissipate joule heating generated from either the main pole or the MAMR stack into surrounding area without electrical shunting, leading to reduced heating or break-down induced failures.Type: ApplicationFiled: March 24, 2020Publication date: July 16, 2020Inventors: Quang LE, Hongquan JIANG, Ning SHI, Alexander M. ZELTSER
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Patent number: 10692851Abstract: A transient voltage suppressor (TVS) is constructed as an NPN bipolar transistor including individually optimized collector-base and emitter-base junctions both with avalanche mode breakdown. The TVS device is constructed using a base that includes a lightly doped base region bordered by a pair of more heavily doped base regions. The two more heavily doped base regions are used to form the collector-base junction and the emitter-base junction both as avalanche breakdown junctions. The lightly doped base region between the collector-base and emitter-base doping regions ensures low leakage current in the TVS device. In this manner, the TVS bipolar transistor of the present invention provides high surge protection with robust clamping while ensuring low leakage current.Type: GrantFiled: November 1, 2018Date of Patent: June 23, 2020Assignee: ALPHA AND OMEGA SEMICONDUCTOR (CAYMAN) LTD.Inventors: Shekar Mallikarjunaswamy, Ning Shi
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Patent number: 10636439Abstract: The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a trailing shield, a main pole, a MAMR stack disposed between the trailing shield and the main pole, side shields surrounding at least a portion of the main pole, and a structure disposed between the side shields and the main pole at a media facing surface (WS). The structure is fabricated from a material that is thermally conductive and electrically insulating/dissipative. The material has a thermal conductivity of at least 50 W/(m*K) and an electrical resistivity of at least 105 ?*m. The structure helps dissipate joule heating generated from either the main pole or the MAMR stack into surrounding area without electrical shunting, leading to reduced heating or break-down induced failures.Type: GrantFiled: February 14, 2019Date of Patent: April 28, 2020Assignee: Western Digital Technologies, Inc.Inventors: Quang Le, Hongquan Jiang, Ning Shi, Alexander M. Zeltser