Patents by Inventor Daehan Choi

Daehan Choi 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).

  • Publication number: 20250213139
    Abstract: Disclosed is a wearable device. A wearable device may include a driving module, a first frame corresponding to a portion of a lower body of a user, an angle sensor configured to sense an angle of the first frame and obtain a first frame angle value, a lumbar support module connected to the driving module and positioned on a lower back area of the user, an inertial measurement unit (IMU) sensor, and a processor(s). The processor(s) may be configured to obtain the first frame angle value using the angle sensor, obtain a first rotation angle value of the lumbar support module using the IMU sensor, determine whether a sitting posture of the user is an abnormal sitting posture based on the first rotation angle value and the first frame angle value, and control the driving module such that the driving module generates a first torque when determining that the sitting posture is the abnormal sitting posture.
    Type: Application
    Filed: November 8, 2024
    Publication date: July 3, 2025
    Inventors: Hwangjae LEE, Bola PARK, Sukhoon SONG, Dokwan LEE, Hyukchan LEE, Daehan CHOI, Dongwoo KIM
  • Publication number: 20250191455
    Abstract: An apparatus for warning vehicle entry into a dangerous area includes: a monitoring period calculator determining a first monitoring period based on a driving speed of a vehicle and a distance from the vehicle to a second dangerous area nearest to the vehicle after an initial first alarm is transmitted as the vehicle enters a first dangerous area; a dangerous area entry detector determining whether the vehicle enters the dangerous area in every first monitoring period; and an alarm transmitter transmitting a second alarm when the vehicle entry into the second dangerous area is detected.
    Type: Application
    Filed: September 23, 2024
    Publication date: June 12, 2025
    Applicants: Hyundai Motor Company, Kia Corporation
    Inventors: Daehan Choi, Suhyeon Chae
  • Patent number: 12224780
    Abstract: According to various embodiments, an electronic device may include: a communication processor, a radio frequency (RF) integrated circuit (RFIC) configured to receive a signal output from the communication processor and to modulate the signal into an RF signal, a power management circuit, a first power amplifier configured to amplify an RF signal output from the RFIC based on power supplied from the power management circuit, a second power amplifier configured to amplify the RF signal output from the RFIC based on the power supplied from the power management circuit, at least one capacitor connected in parallel to a power supply terminal of the first power amplifier, and at least one switch connected between the power supply terminal and the at least one capacitor, wherein the communication processor is configured to: identify a power amplification mode based a frequency band of the RF signal, and control the at least one switch by outputting a control signal corresponding to the identified power amplification
    Type: Grant
    Filed: May 12, 2022
    Date of Patent: February 11, 2025
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyujae Jang, Cheonshik Kim, Juho Van, Jonghyeok Im, Daeyoung Jo, Youngjune Hong, Daehan Choi, Hyeyong Go, Yeongseob Lim, Sungyoul Cho, Taekyoung Jin
  • Patent number: 12040366
    Abstract: A method for forming a semiconductor structure. Two isolation structures are formed in a semiconductor. A cavity is etched in the semiconductor between the two isolation structures in the semiconductor. Dopants are implanted into a bottom side of the cavity to form a doped region in the semiconductor below the cavity between the two isolation structures. A contact is formed in the cavity. The contact is on the doped region and in direct contact with the doped region.
    Type: Grant
    Filed: June 8, 2021
    Date of Patent: July 16, 2024
    Assignee: The Boeing Company
    Inventors: Kangmu Min Lee, Maxwell Daehan Choi, Jeffrey Alden Wright, Wonill Ha, Clayton Jackson, Michael Pemberton Jura, Adele Schmitz, James Chappell
  • Publication number: 20220368358
    Abstract: According to various embodiments, an electronic device may include: a communication processor, a radio frequency (RF) integrated circuit (RFIC) configured to receive a signal output from the communication processor and to modulate the signal into an RF signal, a power management circuit, a first power amplifier configured to amplify an RF signal output from the RFIC based on power supplied from the power management circuit, a second power amplifier configured to amplify the RF signal output from the RFIC based on the power supplied from the power management circuit, at least one capacitor connected in parallel to a power supply terminal of the first power amplifier, and at least one switch connected between the power supply terminal and the at least one capacitor, wherein the communication processor is configured to: identify a power amplification mode based a frequency band of the RF signal, and control the at least one switch by outputting a control signal corresponding to the identified power amplification
    Type: Application
    Filed: May 12, 2022
    Publication date: November 17, 2022
    Inventors: Kyujae JANG, Cheonshik KIM, Juho VAN, Jonghyeok IM, Daeyoung JO, Youngjune HONG, Daehan CHOI, Hyeyong GO, Yeongseob LIM, Sungyoul CHO, Taekyoung JIN
  • Publication number: 20220028989
    Abstract: A method for forming a semiconductor structure. Two isolation structures are formed in a semiconductor. A cavity is etched in the semiconductor between the two isolation structures in the semiconductor. Dopants are implanted into a bottom side of the cavity to form a doped region in the semiconductor below the cavity between the two isolation structures. A contact is formed in the cavity. The contact is on the doped region and in direct contact with the doped region.
    Type: Application
    Filed: June 8, 2021
    Publication date: January 27, 2022
    Inventors: Kangmu Min Lee, Maxwell Daehan Choi, Jeffrey Alden Wright, Wonill Ha, Clayton Jackson, Michael Pemberton Jura, Adele Schmitz, James Chappell
  • Patent number: 7910489
    Abstract: A method for etching features into an etch layer disposed below a photoresist mask without an intermediate hardmask is provided. A plurality of etch cycles are provided. Each etch cycle comprises providing a deposition etch phase that etches features into the etch layer and deposits polymer on sidewalls of the features and over the photoresist and providing a cleaning phase that removes polymer deposited on the sidewalls.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: March 22, 2011
    Assignee: Lam Research Corporation
    Inventors: Ji Soo Kim, Peter Cirigliano, Sangheon Lee, Dongho Heo, Daehan Choi, S. M. Reza Sadjadi
  • Patent number: 7560388
    Abstract: A method providing features in a dielectric layer is provided. A sacrificial layer is formed over the dielectric layer. A set of sacrificial layer features is etched into the sacrificial layer. A first set of dielectric layer features is etched into the dielectric layer through the sacrificial layer. The first set of dielectric layer features and the set of sacrificial layer features are filled with a filler material. The sacrificial layer is removed. The widths of the spaces between the parts of the filler material are shrunk with a shrink sidewall deposition. A second set of dielectric layer features is etched into the dielectric layer through the shrink sidewall deposition. The filler material and shrink sidewall deposition are removed.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: July 14, 2009
    Assignee: Lam Research Corporation
    Inventors: Jisoo Kim, Sangheon Lee, Daehan Choi, S. M. Reza Sadjadi
  • Patent number: 7476610
    Abstract: A method for forming semiconductor devices is provided. A gate stack is formed over a surface of a substrate. A plurality of cycles for forming polymer spacers on sides of the gate stack is provided, where each cycle comprises providing a deposition phase that deposits material on the sides of the polymer spacer and over the surface of the substrate, and providing a cleaning phase that removes polymer over the surface of the substrate and shapes a profile of the deposited material. Dopant is implanted into the substrate using the polymer spacers as a dopant mask. The polymer spacers are removed.
    Type: Grant
    Filed: November 10, 2006
    Date of Patent: January 13, 2009
    Assignee: Lam Research Corporation
    Inventors: Ji Soo Kim, Conan Chiang, Daehan Choi, S. M. Reza Sadjadi, Michael Goss
  • Patent number: 7390749
    Abstract: A method for providing features in an etch layer with a memory region and a peripheral region is provided. A memory patterned mask is formed over a first sacrificial layer. A first set of sacrificial layer features is etched into the first sacrificial layer and a second sacrificial layer. Features of the first set of sacrificial layer features are filled with filler material. The first sacrificial layer is removed. The spaces are shrunk with a shrink sidewall deposition. A second set of sacrificial layer features is etched into the second sacrificial layer. The filler material and shrink sidewall deposition are removed. A peripheral patterned mask is formed over the memory region and peripheral region. The second sacrificial layer is etched through the peripheral patterned mask. The peripheral patterned mask is removed. Features are etched into the etch layer from the second sacrificial layer.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: June 24, 2008
    Assignee: Lam Research Corporation
    Inventors: Ji Soo Kim, Sangheon Lee, Daehan Choi, S. M. Reza Sadjadi
  • Publication number: 20080111166
    Abstract: A method for forming semiconductor devices is provided. A gate stack is formed over a surface of a substrate. A plurality of cycles for forming polymer spacers on sides of the gate stack is provided, where each cycle comprises providing a deposition phase that deposits material on the sides of the polymer spacer and over the surface of the substrate, and providing a cleaning phase that removes polymer over the surface of the substrate and shapes a profile of the deposited material. Dopant is implanted into the substrate using the polymer spacers as a dopant mask. The polymer spacers are removed.
    Type: Application
    Filed: November 10, 2006
    Publication date: May 15, 2008
    Inventors: Ji Soo Kim, Conan Chiang, Daehan Choi, S. M. Reza Sadjadi, Michael Goss
  • Publication number: 20070193973
    Abstract: A method for etching features into an etch layer disposed below a photoresist mask without an intermediate hardmask is provided. A plurality of etch cycles are provided. Each etch cycle comprises providing a deposition etch phase that etches features into the etch layer and deposits polymer on sidewalls of the features and over the photoresist and providing a cleaning phase that removes polymer deposited on the sidewalls.
    Type: Application
    Filed: February 17, 2006
    Publication date: August 23, 2007
    Inventors: Ji Kim, Peter Cirigliano, Sangheon Lee, Dongho Heo, Daehan Choi, S. Sadjadi
  • Publication number: 20070123053
    Abstract: A method providing features in a dielectric layer is provided. A sacrificial layer is formed over the dielectric layer. A set of sacrificial layer features is etched into the sacrificial layer. A first set of dielectric layer features is etched into the dielectric layer through the sacrificial layer. The first set of dielectric layer features and the set of sacrificial layer features are filled with a filler material. The sacrificial layer is removed. The widths of the spaces between the parts of the filler material are shrunk with a shrink sidewall deposition. A second set of dielectric layer features is etched into the dielectric layer through the shrink sidewall deposition. The filler material and shrink sidewall deposition are removed.
    Type: Application
    Filed: November 30, 2005
    Publication date: May 31, 2007
    Inventors: Jisoo Kim, Sangheon Lee, Daehan Choi, S.M. Sadjadi
  • Publication number: 20070122977
    Abstract: A method for providing features in an etch layer with a memory region and a peripheral region is provided. A memory patterned mask is formed over a first sacrificial layer. A first set of sacrificial layer features is etched into the first sacrificial layer and a second sacrificial layer. Features of the first set of sacrificial layer features are filled with filler material. The first sacrificial layer is removed. The spaces are shrunk with a shrink sidewall deposition. A second set of sacrificial layer features is etched into the second sacrificial layer. The filler material and shrink sidewall deposition are removed. A peripheral patterned mask is formed over the memory region and peripheral region. The second sacrificial layer is etched through the peripheral patterned mask. The peripheral patterned mask is removed. Features are etched into the etch layer from the second sacrificial layer.
    Type: Application
    Filed: November 9, 2006
    Publication date: May 31, 2007
    Inventors: Ji Kim, Sangheon Lee, Daehan Choi, S. Sadjadi