Patents by Inventor Kuk-Hwan Kim

Kuk-Hwan Kim 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).

  • Patent number: 10971681
    Abstract: A method for manufacturing an array of magnetic memory elements, wherein first memory element types are formed in a first region and second type of magnetic memory element types are formed in a second region. A shadow-mask is used during deposition to limit the deposition of at least one layer of memory element material to only the second region wherein the second memory element types are to be formed. The method can include depositing full film magnetic memory element layers over an entire substrate and then using the shadow-mask to deposit at least one performance altering material in the second memory element region. Alternatively, a first shadow-mask can be used to deposit a series of first memory element layers in a first region, and a second shadow-mask can be used to deposit a plurality of second memory element layers in a second region.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: April 6, 2021
    Assignee: SPIN MEMORY, INC.
    Inventors: Kadriye Deniz Bozdag, Eric Michael Ryan, Kuk-Hwan Kim
  • Patent number: 10930703
    Abstract: A method for crystalized silicon structures from amorphous structures in a magnetic memory array, wherein the temperature needed to crystalize the amorphous silicon is lower than the temperature budget of the memory element so as to avoid damage to the memory element. An amorphous silicon is deposited, followed by a layer of Ti or Co. An annealing process is then performed which causes the Ti or Co to form TiSi2 or CoSi2 and also causes the underlying amorphous silicon to crystallize.
    Type: Grant
    Filed: December 31, 2018
    Date of Patent: February 23, 2021
    Assignee: SPIN MEMORY, INC.
    Inventors: Kuk-Hwan Kim, Dafna Beery, Marcin Gajek, Michail Tzoufras, Kadriye Deniz Bozdag, Eric Michael Ryan, Satoru Araki, Andrew J. Walker
  • Patent number: 10916582
    Abstract: According to one embodiment, a method includes forming a first insulative layer above a bottom surface of a groove and along inner sidewalls thereof, forming a source line layer within the groove of the substrate, forming a first dielectric layer on outer sides of a middle portion of the source line layer, forming a buffer layer on outer sides of the first dielectric layer, forming a gate terminal above the source line layer, forming a gate dielectric layer between the source line layer and the gate terminal and on outer sides of the lower portion of the gate terminal, forming a drain terminal including strained Si on outer sides of the first dielectric layer, and forming a relaxed buffer layer on outer sides of the upper portion of the source line layer and outer sides of the drain terminal, with the gate terminal extending beyond the relaxed buffer layer thickness.
    Type: Grant
    Filed: December 30, 2017
    Date of Patent: February 9, 2021
    Assignee: SPIN MEMORY, INC.
    Inventors: Kuk-Hwan Kim, Dafna Beery, Amitay Levi, Andrew J. Walker
  • Patent number: 10852909
    Abstract: Disclosed is a portable electronic device including a housing including a first surface and a second surface facing a direction opposite to the first surface, a display including a touchscreen panel exposed through the first surface of the housing and having a substantially rectangular shape, wherein the display has a first side and a third side extending with a first length in a first direction, and a second side and a fourth side substantially perpendicular to the first direction and extending with a second length which is less than the first length, and wherein a ratio of the first length to the second length is x:9, in which the x is equal to or greater than 16, a wireless communication circuit, a processor, and a memory.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: December 1, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seung Min Choi, Woon Geun Kwak, Kuk Hwan Kim, Jung Sik Park, Jung Hee Yeo, Yong Seok Lee, Min Su Jung
  • Patent number: 10854260
    Abstract: The various implementations described herein include methods, devices, and systems for performing operations on memory devices. In one aspect, a memory device a magnetic memory component and a current selector component coupled to the magnetic memory component. The current selector component includes a first transistor having a first gate with a corresponding first threshold voltage. The first transistor comprises a charge storage layer configured to selectively store charge so as to adjust a current through the first transistor. The memory device further includes control circuitry configured to determine a bit error rate of the magnetic memory component and adjust a charge stored in the charge storage layer based on the determined bit error rate.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: December 1, 2020
    Assignee: SPIN MEMORY, INC.
    Inventors: Kuk-Hwan Kim, Gian Sharma, Amitay Levi
  • Patent number: 10847198
    Abstract: A magnetic data recording system utilizing different magnetic memory element types to optimize competing performance parameters in a common memory chip. The memory system includes a first memory portion which can be a main memory and which includes magnetic memory elements of a first type, and a second memory region which can be a temporary memory region and which includes magnetic memory elements of a second type. A memory controller can be provided for controlling the input and retrieval of data to and from the first and second memory elements. The second, memory region can be a scratchpad memory or could also be cache type memory. The first type of magnetic memory elements can be designed for high data retention, whereas the second type of magnetic memory elements can be designed for fast write speed (low latency) and low write power consumption.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: November 24, 2020
    Assignee: SPIN MEMORY, INC.
    Inventors: Kadriye Deniz Bozdag, Eric Michael Ryan, Kuk-Hwan Kim
  • Patent number: 10847199
    Abstract: A magnetic memory device that includes magnetic read elements and magnetic reference cells. The magnetic reference cells include magnetic tunnel junction elements having the same construction as the magnetic read elements. The reference cells produce a reference signal that can be compared with a read signal from the magnetic read element to determine whether the read element is in a high or low resistance state. During creation of the reference signal, the current passes in such a way so that reference cells are forced to be in the right state while causing no disturbance to the reference cell. The reference cell includes magnetic tunnel junction elements and also includes circuitry configured to produce a magnetic field that biases the magnetic tunnel junction elements of the reference cell into a desired magnetic state to ensure that the desired magnetic state of the reference cell magnetic tunnel junction elements is maintained.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: November 24, 2020
    Assignee: SPIN MEMORY, INC.
    Inventors: Kuk-Hwan Kim, Kadriye Deniz Bozdag, Eric Michael Ryan
  • Patent number: 10790333
    Abstract: According to one embodiment, a method includes forming, at a low temperature, a thin film transistor structure above a flexible substrate in a film thickness direction. The low temperature is less than about 200° C., and the thin film transistor structure includes a contact pad on a lower or upper surface thereof. The method also includes forming, at a high temperature, a perpendicular magnetic tunnel junction (pMTJ) structure above a rigid substrate. The high temperature is greater than about 200° C. The method also includes removing the rigid substrate from below the pMTJ structure and bonding, at the low temperature, the pMTJ structure to the thin film transistor structure using an adhesion layer. Other methods of forming flexible substrates for mounting pMTJs and systems thereof are described in accordance with more embodiments.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: September 29, 2020
    Assignee: SPIN MEMORY, INC.
    Inventors: Kuk-Hwan Kim, Marcin Gajek, Dafna Beery, Amitay Levi
  • Publication number: 20200302983
    Abstract: A magnetic memory device that includes magnetic read elements and magnetic reference cells. The magnetic reference cells include magnetic tunnel junction elements having the same construction as the magnetic read elements. The reference cells produce a reference signal that can be compared with a read signal from the magnetic read element to determine whether the read element is in a high or low resistance state. During creation of the reference signal, the current passes in such a way so that reference cells are forced to be in the right state while causing no disturbance to the reference cell. The reference cell includes magnetic tunnel junction elements and also includes circuitry configured to produce a magnetic field that biases the magnetic tunnel junction elements of the reference cell into a desired magnetic state to ensure that the desired magnetic state of the reference cell magnetic tunnel junction elements is maintained.
    Type: Application
    Filed: March 22, 2019
    Publication date: September 24, 2020
    Inventors: Kuk-Hwan Kim, Kadriye Deniz Bozdag, Eric Michael Ryan
  • Patent number: 10770510
    Abstract: A device having two transistors with dual thresholds, and a method of fabricating the device, including fabricating a silicide source, a conductive layer, and contacts to a plurality of layers of the device, is provided. The device has a core and a plurality of layers that surround the core in succession, including a first layer, a second layer, a third layer, and a fourth layer. The device further comprises a first input terminal coupled to the core, the first input terminal being configured to receive a first voltage and a second input terminal coupled to the fourth layer, the second input terminal being configured to receive a second voltage. The device comprises a common source terminal coupled to the core and the fourth layer. A memory device, such as an MTJ, may be coupled to the device.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: September 8, 2020
    Assignee: SPIN MEMORY, INC.
    Inventors: Gian Sharma, Amitay Levi, Kuk-Hwan Kim
  • Patent number: 10770561
    Abstract: An annular device is provided. The annular device includes a first transistor including a first input terminal and a second transistor including a second input terminal. The first input terminal and the second input terminal extend radially outward from the annular device, and wherein the first input terminal is aligned with the second input terminal.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: September 8, 2020
    Assignee: SPIN MEMORY, INC.
    Inventors: Gian Sharma, Amitay Levi, Kuk-Hwan Kim
  • Publication number: 20200212296
    Abstract: Aspects of the present technology are directed toward Integrated Circuits (IC) including a plurality of trenches disposed in a substrate about a set of silicide regions. The trenches can extend down into the substrate below the set of silicide regions. The silicide regions can be formed by implanting metal ions into portions of a substrate exposed by a mask layer with narrow pitch openings. The trenches can be formed by selectively etching the substrate utilizing the set of silicide regions as a trench mask. An semiconductor material with various degree of crystallinity can be grown from the silicide regions, in openings that extend through subsequently formed layers down to the silicide regions.
    Type: Application
    Filed: December 28, 2018
    Publication date: July 2, 2020
    Inventors: Kuk-Hwan Kim, Dafna Beery, Marcin Gajek, Michail Tzoufras, Kadriye Deniz Bozdag, Eric Ryan, Satoru Araki, Andy Walker
  • Patent number: 10686009
    Abstract: A method for forming three-dimensional magnetic memory arrays by forming crystalized silicon structures from amorphous structures in the magnetic memory array, wherein the temperature needed to crystalize the amorphous silicon is lower than the temperature budget of the memory element so as to avoid damage to the memory element. An amorphous silicon is deposited, followed by a layer of Ti or Co. An annealing process is then performed which causes the Ti or Co to form TiSi2 or CoSi2 and also causes the underlying amorphous silicon to crystallize.
    Type: Grant
    Filed: December 31, 2018
    Date of Patent: June 16, 2020
    Assignee: SPIN MEMORY, INC.
    Inventors: Kuk-Hwan Kim, Dafna Beery, Marcin Gajek, Michail Tzoufras, Kadriye Deniz Bozdag, Eric Michael Ryan, Satoru Araki, Andrew J. Walker
  • Publication number: 20200185601
    Abstract: A method for manufacturing an array of magnetic memory elements, wherein first memory element types are formed in a first region and second type of magnetic memory element types are formed in a second region. A shadow-mask is used during deposition to limit the deposition of at least one layer of memory element material to only the second region wherein the second memory element types are to be formed. The method can include depositing full film magnetic memory element layers over an entire substrate and then using the shadow-mask to deposit at least one performance altering material in the second memory element region. Alternatively, a first shadow-mask can be used to deposit a series of first memory element layers in a first region, and a second shadow-mask can be used to deposit a plurality of second memory element layers in a second region.
    Type: Application
    Filed: December 5, 2018
    Publication date: June 11, 2020
    Inventors: Kadriye Deniz Bozdag, Eric Michael Ryan, Kuk-Hwan Kim
  • Patent number: 10658425
    Abstract: A method of forming a transistor, according to one embodiment, includes: forming an doped material, depositing an oxide layer on the doped material, depositing a conducting layer on the oxide layer, patterning the conducting layer to form at least two word lines, depositing a nitride layer above the at least two word lines, defining at least two hole regions, at each of the defined hole regions, etching down to the doped material through each of the respective word lines, thereby creating at least two holes, depositing a gate dielectric layer on the nitride layer and in the at least two holes, depositing a protective layer on the gate dielectric layer, etching in each of the at least two holes down to the doped material, and removing a remainder of the protective layer.
    Type: Grant
    Filed: December 31, 2018
    Date of Patent: May 19, 2020
    Assignee: SPIN MEMORY, INC.
    Inventors: Kuk-Hwan Kim, Dafna Beery, Amitay Levi, Andrew J. Walker
  • Publication number: 20200143862
    Abstract: A magnetic data recording system utilizing different magnetic memory element types to optimize competing performance parameters in a common memory chip. The memory system includes a first memory portion which can be a main memory and which includes magnetic memory elements of a first type, and a second memory region which can be a temporary memory region and which includes magnetic memory elements of a second type. A memory controller can be provided for controlling the input and retrieval of data to and from the first and second memory elements. The second, memory region can be a scratchpad memory or could also be cache type memory. The first type of magnetic memory elements can be designed for high data retention, whereas the second type of magnetic memory elements can be designed for fast write speed (low latency) and low write power consumption.
    Type: Application
    Filed: November 1, 2018
    Publication date: May 7, 2020
    Inventors: Kadriye Deniz Bozdag, Eric Michael Ryan, Kuk-Hwan Kim
  • Patent number: 10629649
    Abstract: According to one embodiment, a method of forming a magnetic memory device includes forming a source region including a first semiconductor material having a first conductivity above a substrate, forming an array of three-dimensional (3D) structures above the substrate, depositing a channel material on a surface of at least one sidewall of each 3D structure, depositing a gate dielectric material on the channel material on the surface of at least one sidewall of each 3D structure, forming a first isolation region in the cavity region above the substrate, forming a first gate region above the first isolation region in the cavity region, and forming a second isolation region above the first gate region, wherein a nth gate region is formed above a (n+1) isolation region thereafter until a top of the array of 3D structures, wherein each nth gate region is coupled to each nth perpendicular magnetic tunnel junction sensor of each 3D structure.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: April 21, 2020
    Assignee: SPIN MEMORY, INC.
    Inventors: Kuk-Hwan Kim, Dafna Beery, Amitay Levi, Andrew J. Walker
  • Publication number: 20200117592
    Abstract: A memory device comprises a memory bank comprising a plurality of addressable memory cells, wherein the memory bank is divided into a plurality of segments. Further, the device comprises a cache memory operable for storing a second plurality of data words, wherein each data word of the second plurality of data words is either awaiting write verification associated with the memory bank or is to be re-written into the memory bank. The cache memory is divided into a plurality of primary segments, wherein each primary segment of the cache memory is direct mapped to a corresponding segment of the plurality of segments, wherein each primary segment is sub-divided into a plurality of secondary segments, and wherein each of the plurality of secondary segments comprises at least one counter for tracking a number of entries stored therein.
    Type: Application
    Filed: October 10, 2019
    Publication date: April 16, 2020
    Inventors: Neal BERGER, Susmita KARMAKAR, TaeJin PYON, Kuk-Hwan KIM
  • Publication number: 20200117610
    Abstract: A memory device for storing data comprises a memory bank comprising a plurality of addressable memory cells, wherein the memory bank is divided into a plurality of segments. The memory device also comprises a cache memory operable for storing a second plurality of data words, wherein further each data word of the second plurality of data words is either awaiting write verification or is to be re-written into the memory bank. The cache memory is divided into a plurality of primary segments, wherein each primary segment of the cache memory is direct mapped to a corresponding segment of the plurality of segments of the memory bank, wherein each primary segment of the plurality of primary segments of the cache memory is sub-divided into a plurality of secondary segments, and each of the plurality of secondary segments comprises at least one counter for tracking a number of valid entries stored therein.
    Type: Application
    Filed: October 10, 2019
    Publication date: April 16, 2020
    Inventors: Neal BERGER, Susmita KARMAKAR, TaeJin PYON, Kuk-Hwan KIM
  • Publication number: 20200105831
    Abstract: A magnetic memory element having voltage controlled magnetic anisotropy for active control of switching energy (delta). The magnetic memory element can be formed as a pillar structure having a magnetic free layer a magnetic reference layer and a non-magnetic barrier layer located between the magnetic free layer and the magnetic reference layer. A dielectric wall is formed around the side of the magnetic free layer and an electrically conductive program line is formed around the dielectric wall, such that the dielectric wall separates the program line from the magnetic free layer. The electrically conductive program line is electrically connected with circuitry to selectively apply a gate voltage to the electrically conductive program line and across the dielectric layer. The circuitry can include a voltage source switching circuitry such as a transistor. The gate voltage advantageously reduces perpendicular magnetic anisotropy in the magnetic free layer, thereby reducing switching energy.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 2, 2020
    Inventors: Marcin Gajek, Kuk-Hwan Kim