Patents by Inventor Naigang Wang
Naigang Wang 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: 11879932Abstract: Techniques regarding autonomous identification of aged circuits are provided. For example, one or more embodiments described herein can comprise a system, which can comprise a memory that can store computer executable components. The system can also comprise a processor, operably coupled to the memory, and that can execute the computer executable components stored in the memory. The computer executable components can comprise an identification component, operatively coupled to the processor, that can identify an aged circuit by analyzing a current-voltage characteristic curve for a distortion in a sub-threshold quiescent current signature of the aged circuit.Type: GrantFiled: October 24, 2018Date of Patent: January 23, 2024Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Franco Stellari, Peilin Song, Naigang Wang
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Patent number: 11620105Abstract: In an embodiment, a method includes configuring a specialized circuit for floating point computations using numbers represented by a hybrid format, wherein the hybrid format includes a first format and a second format. In the embodiment, the method includes operating the further configured specialized circuit to store an approximation of a numeric value in the first format during a forward pass for training a deep learning network. In the embodiment, the method includes operating the further configured specialized circuit to store an approximation of a second numeric value in the second format during a backward pass for training the deep learning network.Type: GrantFiled: December 21, 2020Date of Patent: April 4, 2023Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Naigang Wang, Jungwook Choi, Kailash Gopalakrishnan, Ankur Agrawal, Silvia Melitta Mueller
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Patent number: 11604647Abstract: An apparatus includes a memory and a processor coupled to the memory. The processor includes first and second sets of arithmetic units having first and second precision for floating-point computations, the second precision being lower than the first precision. The processor is configured to obtain a machine learning model trained in the first precision, to utilize the second set of arithmetic units to perform inference on input data, to utilize the first set of arithmetic units to generate feedback for updating parameters of the second set of arithmetic units based on the inference performed on the input data by the second set of arithmetic units, to tune parameters of the second set of arithmetic units based at least in part on the feedback generated by the first set of arithmetic units, and to utilize the second set of arithmetic units with the tuned parameters to generate inference results.Type: GrantFiled: September 3, 2019Date of Patent: March 14, 2023Assignee: International Business Machines CorporationInventors: Xiao Sun, Chia-Yu Chen, Naigang Wang, Jungwook Choi, Kailash Gopalakrishnan
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Patent number: 11479845Abstract: Embodiments are directed to a method of forming a magnetic stack arrangement of a laminated magnetic inductor having a high frequency peak quality factor (Q). A first magnetic stack is formed having one or more magnetic layers alternating with one or more insulating layers in a first inner region of a laminated magnetic inductor. A second magnetic stack is formed opposite a surface of the first magnetic stack in an outer region of the laminated magnetic inductor. A third magnetic stack is formed opposite a surface of the second magnetic stack in a second inner region of the laminated magnetic inductor. The insulating layers are formed such that a thickness of an insulating layer in the second magnetic stack is greater than a thickness of an insulating layer in the first magnetic stack.Type: GrantFiled: October 3, 2019Date of Patent: October 25, 2022Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hariklia Deligianni, Bruce B. Doris, Eugene J. O'Sullivan, Naigang Wang
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Patent number: 11367569Abstract: Embodiments of the invention are directed to a method of fabricating a yoke arrangement of an inductor. A non-limiting example method includes forming a dielectric layer across from a major surface of a substrate. The method further includes configuring the dielectric layer such that it imparts a predetermined dielectric layer compressive stress on the substrate. A magnetic stack is formed on an opposite side of the dielectric layer from the substrate, wherein the magnetic stack includes one or more magnetic layers alternating with one or more insulating layers. The method further includes configuring the magnetic stack such that it imparts a predetermined magnetic stack tensile stress on the dielectric layer, wherein a net effect of the predetermined dielectric layer compressive stress and the predetermined magnetic stack tensile stress on the substrate is insufficient to cause a portion of the major surface of the substrate to be substantially non-planar.Type: GrantFiled: August 21, 2018Date of Patent: June 21, 2022Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hariklia Deligianni, Bruce B. Doris, Eugene J. O'Sullivan, Naigang Wang
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Patent number: 11361889Abstract: Embodiments are directed to a method of forming a laminated magnetic inductor and resulting structures having multiple magnetic layer thicknesses. A first magnetic stack having one or more magnetic layers alternating with one or more insulating layers is formed in a first inner region of the laminated magnetic inductor. A second magnetic stack is formed opposite a major surface of the first magnetic stack in an outer region of the laminated magnetic inductor. A third magnetic stack is formed opposite a major surface of the second magnetic stack in a second inner region of the laminated magnetic inductor. The magnetic layers are formed such that a thickness of a magnetic layer in each of the first and third magnetic stacks is less than a thickness of a magnetic layer in the second magnetic stack.Type: GrantFiled: January 28, 2020Date of Patent: June 14, 2022Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hariklia Deligianni, Bruce B. Doris, Eugene J. O'Sullivan, Naigang Wang
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Publication number: 20220180171Abstract: An apparatus includes a floating-point gradient register; an integer register; a memory bank; and an array of processing units. Each of the units includes a plurality of binary shifters having an integer input configured to obtain corresponding bits of a 4-bit integer multiplicand, and a shift-specifying input configured to obtain corresponding bits in an exponent field of a 4-bit floating point multiplier. The multiplier is specified in a mantissaless four-bit floating point format including a sign bit, three exponent bits, and no mantissa bits. An adder tree has a plurality of inputs coupled to outputs of the plurality of shifters, and a rounder has an input coupled to an output of the adder tree. The integer inputs are connected to the integer register; the shift-specifying inputs are connected to the floating-point gradient register; and outputs of the rounders are coupled to the memory bank.Type: ApplicationFiled: December 4, 2020Publication date: June 9, 2022Inventors: Xiao Sun, Ankur Agrawal, Kailash Gopalakrishnan, Naigang Wang, Chia-Yu Chen, Jiamin Ni
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Patent number: 11342115Abstract: A planar magnetic structure includes a closed loop structure having a plurality of core segments divided into at least two sets. A coil is formed about one or more core segments. A first antiferromagnetic layer is formed on a first set of core segments, and a second antiferromagnetic layer is formed on a second set of core segments. The first and second antiferromagnetic layers include different blocking temperatures and have an easy axis pinning a magnetic moment in two different directions, wherein when current flows through the coil, the magnetic moments rotate to form a closed magnetic loop in the closed loop structure.Type: GrantFiled: September 4, 2019Date of Patent: May 24, 2022Assignee: International Business Machines CorporationInventors: Guohan Hu, Naigang Wang
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Patent number: 11222742Abstract: Embodiments are directed to a method of forming a laminated magnetic inductor and resulting structures having anisotropic magnetic layers. A first magnetic stack is formed having one or more magnetic layers alternating with one or more insulating layers. A trench is formed in the first magnetic stack oriented such that an axis of the trench is perpendicular to a hard axis of the magnetic inductor. The trench is filled with a dielectric material.Type: GrantFiled: October 3, 2019Date of Patent: January 11, 2022Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hariklia Deligianni, Bruce B. Doris, Eugene J. O'Sullivan, Naigang Wang
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Patent number: 11222746Abstract: A planar magnetic structure includes a closed loop structure having a plurality of core segments divided into at least two sets. A coil is formed about one or more core segments. A first antiferromagnetic layer is formed on a first set of core segments, and a second antiferromagnetic layer is formed on a second set of core segments. The first and second antiferromagnetic layers include different blocking temperatures and have an easy axis pinning a magnetic moment in two different directions, wherein when current flows through the coil, the magnetic moments rotate to form a closed magnetic loop in the closed loop structure.Type: GrantFiled: October 28, 2019Date of Patent: January 11, 2022Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Guohan Hu, Naigang Wang
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Publication number: 20210395080Abstract: A micro-electromechanical device and method of manufacture are disclosed. A sacrificial layer is formed on a silicon substrate. A metal layer is formed on a top surface of the sacrificial layer. Soft magnetic material is electrolessly deposited on the metal layer to manufacture the micro-electromechanical device. The sacrificial layer is removed to produce a metal beam separated from the silicon substrate by a space.Type: ApplicationFiled: September 7, 2021Publication date: December 23, 2021Inventors: William J. Gallagher, Eugene J. O'Sullivan, Naigang Wang
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Patent number: 11205541Abstract: A method for fabricating a magnetic material stack on a substrate, comprises forming a first dielectric layer, forming a first magnetic material layer on the first dielectric layer, forming at least a second dielectric layer on the first magnetic material layer and forming at least a second magnetic material layer on the second dielectric layer. During one or more of the forming steps, a surface smoothing operation is performed to remove at least a portion of surface roughness on the layer being formed.Type: GrantFiled: March 4, 2019Date of Patent: December 21, 2021Assignee: International Business Machines CorporationInventors: Hariklia Deligianni, Bruce B. Doris, Eugene J. O'Sullivan, Naigang Wang
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Patent number: 11174159Abstract: A micro-electromechanical device and method of manufacture are disclosed. A sacrificial layer is formed on a silicon substrate. A metal layer is formed on a top surface of the sacrificial layer. Soft magnetic material is electrolessly deposited on the metal layer to manufacture the micro-electromechanical device. The sacrificial layer is removed to produce a metal beam separated from the silicon substrate by a space.Type: GrantFiled: August 20, 2013Date of Patent: November 16, 2021Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: William J. Gallagher, Eugene J. O'Sullivan, Naigang Wang
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Patent number: 11170933Abstract: Embodiments of the invention are directed to a method of fabricating a yoke arrangement of an inductor. A non-limiting example method includes forming a dielectric layer across from a major surface of a substrate. The method further includes configuring the dielectric layer such that it imparts a predetermined dielectric layer compressive stress on the substrate. A magnetic stack is formed on an opposite side of the dielectric layer from the substrate, wherein the magnetic stack includes one or more magnetic layers alternating with one or more insulating layers. The method further includes configuring the magnetic stack such that it imparts a predetermined magnetic stack tensile stress on the dielectric layer, wherein a net effect of the predetermined dielectric layer compressive stress and the predetermined magnetic stack tensile stress on the substrate is insufficient to cause a portion of the major surface of the substrate to be substantially non-planar.Type: GrantFiled: April 23, 2019Date of Patent: November 9, 2021Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hariklia Deligianni, Bruce B. Doris, Eugene J. O'Sullivan, Naigang Wang
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Patent number: 11114944Abstract: A multi-phase buck switching converter having grouped pairs of phases, each phase using two magnetically coupled air-core inductors. For each group, a first driver circuit controlling switching of a first power transistor switching circuit coupled to a first air-core inductor output for driving an output load at the first phase. A second driver circuit controlling switching of a second power transistor switching circuit coupled to a second air-core inductor output for driving said output load at the second phase. The first and second phases are spaced 180° apart. The coupled air-core inductors per group of such orientation, separation distance and mutual inductance polarity relative to each other such that magnetic coupling between the two or more inductors at each phase results in a net increase in effective inductance per unit volume. Each air-core inductor is a metal slab of defined length, height and thickness formed using back-end-of-line semiconductor manufacturing process.Type: GrantFiled: December 9, 2019Date of Patent: September 7, 2021Assignee: International Business Machines CorporationInventors: Xin Zhang, Todd E. Takken, Naigang Wang, Leland Chang
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Patent number: 11107878Abstract: An on-chip magnetic structure includes a palladium activated seed layer and a substantially amorphous magnetic material disposed onto the palladium activated seed layer. The substantially amorphous magnetic material includes nickel in a range from about 50 to about 80 atomic % (at. %) based on the total number of atoms of the magnetic material, iron in a range from about 10 to about 50 at. % based on the total number of atoms of the magnetic material, and phosphorous in a range from about 0.1 to about 30 at. % based on the total number of atoms of the magnetic material. The magnetic material can include boron in a range from about 0.1 to about 5 at. % based on the total number of atoms of the magnetic material.Type: GrantFiled: March 24, 2015Date of Patent: August 31, 2021Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hariklia Deligianni, William J. Gallagher, Maurice Mason, Eugene J. O'Sullivan, Lubomyr T. Romankiw, Naigang Wang
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Publication number: 20210202400Abstract: The structure includes a substrate. The structure includes a semiconductor chip connected to the substrate via on or more solder balls. The structure includes a magnetic shielding sheet located between the substrate and the semiconductor chip.Type: ApplicationFiled: December 30, 2019Publication date: July 1, 2021Inventors: Xin Zhang, Todd Edward Takken, Naigang Wang
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Patent number: 11014127Abstract: A first material is filled during a semiconductor fabrication process in a space bound on at least one side by a fence formation created as a result of an etching operation. A solvent-removable material is deposited such that the solvent-removable material encapsulates at least that portion of the fence formation which is protruding from the structure such that a height of the fence formation exceeds a height of the structure. The portion of the fence formation which is protruding from the structure and a first portion of the solvent-removable material are removed by planarization. A second portion of the solvent-removable material is removed by dissolving in a solvent, the second portion remaining after removal by the planarization of the first portion of the solvent-removable material.Type: GrantFiled: October 7, 2019Date of Patent: May 25, 2021Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hariklia Deligianni, Bruce B. Doris, Eugene J. O'Sullivan, Naigang Wang
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Patent number: 10998854Abstract: Semiconductor devices and methods relating to the semiconductor devices are provided. A semiconductor device includes a resonant clock circuit. The semiconductor device further includes an inductor. The semiconductor device also includes a magnetic layer formed of a magnetic material disposed in between a portion of the resonant clock circuit and the inductor. Clock signals of the resonant clock circuit are utilized by the magnetic layer.Type: GrantFiled: June 2, 2017Date of Patent: May 4, 2021Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Bruce B. Doris, Rajiv V. Joshi, Naigang Wang
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Patent number: 10984948Abstract: A method for forming an inductor device. The method comprises forming a trench within a central core region of a conductive coil formed within a dielectric material. The method further comprises forming a composite region within the trench. The composite region including a polymer matrix having a plurality of particles with magnetic properties dispersed therein with the central core region to reduce eddy current loss and increase energy storage.Type: GrantFiled: November 2, 2017Date of Patent: April 20, 2021Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Chandrasekharan Kothandaraman, Eugene J. O'Sullivan, Naigang Wang