Patents by Inventor Haesung Kwon
Haesung Kwon 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: 11039814Abstract: An imaging system includes: a transceiver cell for generating a pressure wave and converting an external pressure wave into an electrical signal; and a control unit for controlling an operation of the transceiver cell. The transceiver cell includes: a substrate; at least one membrane suspending from the substrate; and a plurality of transducer elements mounted on the at least one membrane. Each of the plurality of transducer elements has a bottom electrode, a piezoelectric layer on bottom electrode, and at least one top electrode on the piezoelectric layer. Each of the plurality of transducer element generates a bending moment in response to applying an electrical potential across the bottom electrode and the at least one top electrode and develops an electrical charge in response to a bending moment due to the external pressure wave.Type: GrantFiled: November 21, 2017Date of Patent: June 22, 2021Assignee: EXO IMAGING, INC.Inventors: Sandeep Akkaraju, Haesung Kwon, Yusuf Haque, Janusz Bryzek
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Publication number: 20210172788Abstract: A micromachined ultrasonic transducer (MUT). The MUT includes: a substrate; a membrane suspending from the substrate; a bottom electrode disposed on the membrane; a piezoelectric layer disposed on the bottom electrode and an asymmetric top electrode is disposed on the piezoelectric layer. The areal density distribution of the asymmetric electrode along an axis has a plurality of local maxima, wherein locations of the plurality of local maxima coincide with locations where a plurality of anti-nodal points at a vibrational resonance frequency is located.Type: ApplicationFiled: February 19, 2021Publication date: June 10, 2021Inventors: Sandeep AKKARAJU, Haesung KWON, Brian BIRCUMSHAW
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Publication number: 20210151661Abstract: Disclosed herein are ultrasonic transducer systems with hybrid contacts comprising: an ultrasonic transducer element comprising a substrate and a membrane; an electrical circuitry; and one or more contacts connected to the ultrasonic transducer element and the electrical circuitry, wherein the one or more contacts are: designed geometrically using a set of rules; arranged with respect to the membrane based on the set of rules or a second set of rules, or both.Type: ApplicationFiled: January 27, 2021Publication date: May 20, 2021Inventors: Haesung Kwon, Brian Bircumshaw, Sandeep Akkaraju
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Patent number: 10969270Abstract: A micromachined ultrasonic transducer (MUT). The MUT includes: a substrate; a membrane suspending from the substrate; a bottom electrode disposed on the membrane; a piezoelectric layer disposed on the bottom electrode and an asymmetric top electrode is disposed on the piezoelectric layer. The areal density distribution of the asymmetric electrode along an axis has a plurality of local maxima, wherein locations of the plurality of local maxima coincide with locations where a plurality of anti-nodal points at a vibrational resonance frequency is located.Type: GrantFiled: March 27, 2020Date of Patent: April 6, 2021Assignee: EXO IMAGING, INC.Inventors: Sandeep Akkaraju, Haesung Kwon, Brian Bircumshaw
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INCREASED MUT COUPLING EFFICIENCY AND BANDWIDTH VIA EDGE GROOVE, VIRTUAL PIVOTS, AND FREE BOUNDARIES
Publication number: 20210078042Abstract: Methods for improving the electromechanical coupling coefficient and bandwidth of micromachined ultrasonic transducers, or MUTs, are presented as well as methods of manufacture of the MUTs improved by the presented methods.Type: ApplicationFiled: September 11, 2020Publication date: March 18, 2021Inventors: Brian BIRCUMSHAW, Sandeep AKKARAJU, Haesung KWON -
Publication number: 20210069748Abstract: Disclosed herein are ultrasonic transducer systems comprising: an ultrasonic transducer comprising a substrate, a diaphragm, and a piezoelectric element; a first electrical circuitry coupled to the ultrasonic transducer, the first electrical circuitry configured for driving the ultrasonic transducer or detecting motion of the diaphragm; a plurality of electrical ports coupled to the ultrasonic transducer; and a second electrical circuitry connected to two or more of the plurality of electrical ports, the electrical circuitry comprising one or more of: a resistor, a capacitor, a switch, and an amplifier, wherein the second electrical circuitry is independent from the first electrical circuitry, and wherein the second electrical circuitry is configured to dampen the motion of the diaphragm.Type: ApplicationFiled: November 16, 2020Publication date: March 11, 2021Inventors: Brian BIRCUMSHAW, Sandeep AKKARAJU, Haesung KWON
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Patent number: 10750643Abstract: A method of manufacturing a chassis that cools thermal energy generating components of an information handling system (IHS) includes: forming an enclosure with a chassis that has a base wall for provisioning a thermal energy generating component; forming one or more stiffeners each having one or more air channels formed transversely through for directing air proximate to the base wall; attaching the one or more stiffeners laterally across the base wall; and attaching a planar member that is horizontally on top of the one or more stiffeners for engaging one or more forward compute components on top of the planar member that substantially block air flow above the planar member to the thermal energy generating component. The one or more air channels eliminate thermal shadowing caused by thermal energy generating components provisioned in a rear area of the chassis.Type: GrantFiled: July 3, 2017Date of Patent: August 18, 2020Assignee: Dell Products, L.P.Inventors: Haesung Kwon, Austin Michael Shelnutt, Walter Carver
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Publication number: 20200249079Abstract: An array of micromachined ultrasonic transducers (MUTs). The array has first and second rows, the MUTs in the first row being equally spaced by a horizontal pitch in a horizontal direction, the MUTs in the second row being equally spaced by the horizontal pitch in the horizontal direction. The MUTs in the second row are shifted along the horizontal direction by a first horizontal distance relative to the MUTs in the first row and shifted along a vertical direction by a first vertical distance relative to the MUTs in the first row. The first horizontal distance is greater than zero and less than the horizontal pitch. The first vertical distance ranges from one tenth of a horizontal width of a MUT to a half of a vertical height of a MUT.Type: ApplicationFiled: April 1, 2020Publication date: August 6, 2020Inventors: Sandeep AKKARAJU, Haesung KWON, Brian BIRCUMSHAW
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Publication number: 20200225082Abstract: A micromachined ultrasonic transducer (MUT). The MUT includes: a substrate; a membrane suspending from the substrate; a bottom electrode disposed on the membrane; a piezoelectric layer disposed on the bottom electrode and an asymmetric top electrode is disposed on the piezoelectric layer. The areal density distribution of the asymmetric electrode along an axis has a plurality of local maxima, wherein locations of the plurality of local maxima coincide with locations where a plurality of anti-nodal points at a vibrational resonance frequency is located.Type: ApplicationFiled: March 27, 2020Publication date: July 16, 2020Inventors: Sandeep AKKARAJU, Haesung KWON, Brian BIRCUMSHAW
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Patent number: 10656007Abstract: An array of micromachined ultrasonic transducers (MUTs). The array has first and second rows, the MUTs in the first row being equally spaced by a horizontal pitch in a horizontal direction, the MUTs in the second row being equally spaced by the horizontal pitch in the horizontal direction. The MUTs in the second row are shifted along the horizontal direction by a first horizontal distance relative to the MUTs in the first row and shifted along a vertical direction by a first vertical distance relative to the MUTs in the first row. The first horizontal distance is greater than zero and less than the horizontal pitch. The first vertical distance ranges from one tenth of a horizontal width of a MUT to a half of a vertical height of a MUT.Type: GrantFiled: April 11, 2018Date of Patent: May 19, 2020Assignee: EXO IMAGING INC.Inventors: Sandeep Akkaraju, Haesung Kwon, Brian Bircumshaw
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Patent number: 10648852Abstract: A micromachined ultrasonic transducer (MUT). The MUT includes: a substrate; a membrane suspending from the substrate; a bottom electrode disposed on the membrane; a piezoelectric layer disposed on the bottom electrode and an asymmetric top electrode is disposed on the piezoelectric layer. The areal density distribution of the asymmetric electrode along an axis has a plurality of local maxima, wherein locations of the plurality of local maxima coincide with locations where a plurality of anti-nodal points at a vibrational resonance frequency is located.Type: GrantFiled: April 11, 2018Date of Patent: May 12, 2020Assignee: EXO IMAGING INC.Inventors: Sandeep Akkaraju, Haesung Kwon, Brian Bircumshaw
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Publication number: 20190316958Abstract: A micromachined ultrasonic transducer (MUT). The MUT includes: a substrate; a membrane suspending from the substrate; a bottom electrode disposed on the membrane; a piezoelectric layer disposed on the bottom electrode and an asymmetric top electrode is disposed on the piezoelectric layer. The areal density distribution of the asymmetric electrode along an axis has a plurality of local maxima, wherein locations of the plurality of local maxima coincide with locations where a plurality of anti-nodal points at a vibrational resonance frequency is located.Type: ApplicationFiled: April 11, 2018Publication date: October 17, 2019Applicant: EXO IMAGING INC.Inventors: Sandeep Akkaraju, Haesung Kwon, Brian Bircumshaw
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Publication number: 20190316957Abstract: An array of micromachined ultrasonic transducers (MUTs). The array has first and second rows, the MUTs in the first row being equally spaced by a horizontal pitch in a horizontal direction, the MUTs in the second row being equally spaced by the horizontal pitch in the horizontal direction. The MUTs in the second row are shifted along the horizontal direction by a first horizontal distance relative to the MUTs in the first row and shifted along a vertical direction by a first vertical distance relative to the MUTs in the first row. The first horizontal distance is greater than zero and less than the horizontal pitch. The first vertical distance ranges from one tenth of a horizontal width of a MUT to a half of a vertical height of a MUT.Type: ApplicationFiled: April 11, 2018Publication date: October 17, 2019Applicant: EXO IMAGING INC.Inventors: Sandeep Akkaraju, Haesung Kwon, Brian Bircumshaw
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Patent number: 10437270Abstract: In accordance with embodiments of the present disclosure, an information handling system may include a processor and a storage resource communicatively coupled to the processor. The storage resource may be configured to monitor one or more operating parameters of the storage resource indicative of vibration external to the storage resource affecting performance of the storage resource, determine whether the one or more operating parameters exceed respective threshold values, and in response to determining that the one or more operating parameters exceed a respective threshold value, communicate an indication from the storage resource to a subsystem of the information handling system that the storage resource is experiencing excessive vibration from sources external to the storage resource.Type: GrantFiled: September 26, 2016Date of Patent: October 8, 2019Assignee: Dell Products L.P.Inventors: Haesung Kwon, Chandrashekar Nelogal, David M. Pereira
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Patent number: 10050363Abstract: A connector for electrically coupling an information handling resource to a backplane, may include a lead frame comprising a plurality of electrically-conductive traces configured to be electrically coupled to the backplane and a receptacle having a plurality of electrically-conductive pins each electrically coupled to a corresponding one of the plurality of electrically-conductive traces of the lead frame, configured to mechanically and electrically couple the respective modular information handling resource to the receptacle, and structurally oriented relative to the electrically-conductive traces of the lead frame and the backplane such that insertion and removal of the respective modular information handling resource to or from the receptacle is caused by applying force to the respective modular information handling resource in a direction substantially parallel to a surface of the backplane having a surface area substantially larger than that of at least all but one of other surfaces of the backplane.Type: GrantFiled: October 28, 2016Date of Patent: August 14, 2018Assignee: Dell Products L.P.Inventors: Kevin W. Mundt, Haesung Kwon
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Patent number: 10042399Abstract: The side profile of a hard drive assembly may be configured with one or more open areas to allow cooling air to pass side-to-side across the hard drive assembly through a lateral flow channel provided by a cavity defined in the base portion of the hard drive assembly.Type: GrantFiled: August 10, 2015Date of Patent: August 7, 2018Assignee: Dell Products LPInventors: Kevin W. Mundt, Haesung Kwon, Frank W. Yu
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Publication number: 20180153512Abstract: An imaging system includes: a transceiver cell for generating a pressure wave and converting an external pressure wave into an electrical signal; and a control unit for controlling an operation of the transceiver cell. The transceiver cell includes: a substrate; at least one membrane suspending from the substrate; and a plurality of transducer elements mounted on the at least one membrane. Each of the plurality of transducer elements has a bottom electrode, a piezoelectric layer on bottom electrode, and at least one top electrode on the piezoelectric layer. Each of the plurality of transducer element generates a bending moment in response to applying an electrical potential across the bottom electrode and the at least one top electrode and develops an electrical charge in response to a bending moment due to the external pressure wave.Type: ApplicationFiled: November 21, 2017Publication date: June 7, 2018Applicant: EXO IMAGING INC.Inventors: Sandeep Akkaraju, Haesung Kwon, Yusuf Haque, Janusz Bryzek
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Publication number: 20180123272Abstract: A connector for electrically coupling an information handling resource to a backplane, may include a lead frame comprising a plurality of electrically-conductive traces configured to be electrically coupled to the backplane and a receptacle having a plurality of electrically-conductive pins each electrically coupled to a corresponding one of the plurality of electrically-conductive traces of the lead frame, configured to mechanically and electrically couple the respective modular information handling resource to the receptacle, and structurally oriented relative to the electrically-conductive traces of the lead frame and the backplane such that insertion and removal of the respective modular information handling resource to or from the receptacle is caused by applying force to the respective modular information handling resource in a direction substantially parallel to a surface of the backplane having a surface area substantially larger than that of at least all but one of other surfaces of the backplane.Type: ApplicationFiled: October 28, 2016Publication date: May 3, 2018Applicant: Dell Products L.P.Inventors: Kevin W. MUNDT, Haesung KWON
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Publication number: 20180088604Abstract: In accordance with embodiments of the present disclosure, an information handling system may include a processor and a storage resource communicatively coupled to the processor. The storage resource may be configured to monitor one or more operating parameters of the storage resource indicative of vibration external to the storage resource affecting performance of the storage resource, determine whether the one or more operating parameters exceed respective threshold values, and in response to determining that the one or more operating parameters exceed a respective threshold value, communicate an indication from the storage resource to a subsystem of the information handling system that the storage resource is experiencing excessive vibration from sources external to the storage resource.Type: ApplicationFiled: September 26, 2016Publication date: March 29, 2018Applicant: Dell Products L.P.Inventors: Haesung KWON, Chandrashekar NELOGAL, David M. PEREIRA
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Patent number: 9927850Abstract: A component carrier may include a carrier front wall and a plurality of carrier side walls extending in a substantially parallel orientation to each other from opposite edges of the chassis front wall, and defining a component channel between them. The carrier side walls may include respective guide flanges extending substantially perpendicularly therefrom such that the guide flanges are in a substantially parallel orientation to each other and the guide flanges are oriented relative to the remainder of the component carrier such that when a component is mounted within the component channel to the component carrier, and the guide flanges may define a plane whereby a combined mass on a first side of the plane of the component carrier and the component is approximately equal to a combined mass on a second side of the component carrier and the component.Type: GrantFiled: March 21, 2016Date of Patent: March 27, 2018Assignee: Dell Products L.P.Inventors: Haesung Kwon, Bernard D. Strmiska