Patents by Inventor Min Choi

Min 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: 20250386746
    Abstract: A variable resistance memory device including: a first electrode; a second electrode facing the first electrode; and a resistance variable portion between the first electrode and the second electrode, wherein the resistance variable portion generates or interrupts a current flow to change a resistance in response to a change in voltage applied between the first electrode and the second electrode, and the current flow is generated or interrupted at a location between the first electrode and the second electrode.
    Type: Application
    Filed: December 17, 2024
    Publication date: December 18, 2025
    Applicant: Chungbuk National University Industry-Academic Cooperation Foundation
    Inventors: Hyun Seok LEE, Min CHOI
  • Publication number: 20250386535
    Abstract: Provided is a semiconductor device with a three-dimensional gate structure that reduces a contact resistance between a metal and a semiconductor and a method of manufacturing the semiconductor. The semiconductor device includes a first nanowire extending in a first direction on a substrate, a junction barrier film surrounding the first nanowire at a first source/drain region and a second source/drain region at first and second ends of the first nanowire in the first direction, a gate electrode surrounding the first nanowire at a channel region in a middle portion of the first nanowire in the first direction with a gate insulating film positioned between the gate electrode and the first nanowire, and a contact electrode surrounding the junction barrier film.
    Type: Application
    Filed: December 20, 2024
    Publication date: December 18, 2025
    Applicants: Samsung Electronics Co., Ltd., Chungbuk National University Industry-Academic Cooperation Foundation
    Inventors: Hyun Seok Lee, Su Jin Kim, Tae Yeon Kim, Gwang Hwi An, Min Choi
  • Patent number: 10285918
    Abstract: Disclosed is a cosmetic composition capable of exhibiting various colors, including red, yellow and blue colors. The disclosed cosmetic composition comprises a red, yellow or blue pearlescent pigment prepared by coating a natural pigment on a matrix, so that it is capable of exhibiting various colors.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: May 14, 2019
    Assignee: CQV CO., LTD.
    Inventors: Kum-Sung Cho, Min Choi, Kwang-Choong Kang, Byung-Ki Choi, Kwang-Soo Lim, Kil-Wan Chang
  • Patent number: 9629796
    Abstract: The present invention relates to a method of preparing a colored gloss pigment using a natural dye. According to the present disclosure, the method may include preparing a dye from a dye material of natural dyes; titrating the dye with an inorganic salt solution and subsequently adjusting a pH neutral to prepare a natural pigment containing the dye; dispersing a substrate coated with a metal oxide into a DI water to form a substrate suspension; and introducing a pH adjusting agent and the natural pigment into the substrate suspension to coat a surface of the substrate with the natural pigment.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: April 25, 2017
    Assignee: CQV CO., LTD.
    Inventors: Min Choi, Kum-Sung Cho, Kwang-Choong Kang, Byung-Ki Choi, Kwang-Soo Lim, Kil-Wan Chang
  • Publication number: 20160361241
    Abstract: Disclosed is a cosmetic composition capable of exhibiting various colors, including red, yellow and blue colors. The disclosed cosmetic composition comprises one or more pigments selected from among a natural pigment, a red, yellow or blue pearlescent pigment prepared by coating a natural pigment on a matrix, and a red, yellow or blue pearlescent pigment prepared by coating a metal oxide on a matrix, so that it is capable of exhibiting various colors.
    Type: Application
    Filed: October 28, 2014
    Publication date: December 15, 2016
    Inventors: Kum-Sung CHO, Min CHOI, Kwang-Choong KANG, Byung-Ki CHOI, Kwang-Soo LIM, Kil-Wan CHANG
  • Publication number: 20160271052
    Abstract: The present invention relates to a method of preparing a colored gloss pigment using a natural dye. According to the present disclosure, the method may include preparing a dye from a dye material of natural dyes; titrating the dye with an inorganic salt solution and subsequently adjusting a pH neutral to prepare a natural pigment containing the dye; dispersing a substrate coated with a metal oxide into a DI water to form a substrate suspension; and introducing a pH adjusting agent and the natural pigment into the substrate suspension to coat a surface of the substrate with the natural pigment.
    Type: Application
    Filed: October 28, 2014
    Publication date: September 22, 2016
    Inventors: Min CHOI, Kum-Sung CHO, Kwang-Choong KANG, Byung-Ki CHOI, Kwang-Soo LIM, Kil-Wan CHANG
  • Publication number: 20070195534
    Abstract: Disclosed are a side emitting lens, a light emitting device using the side emitting lens, a mold assembly for preparing the side emitting lens and a method for preparing the side emitting using the mold assembly. The lens of the present invention has a simple structure so the lens is easily fabricated through a molding process. If the lens is applied to the light emitting member, light generated from the light emitting member is laterally guided by means of the lens.
    Type: Application
    Filed: August 18, 2006
    Publication date: August 23, 2007
    Inventors: Duk Ha, Bu Shin, Min Choi, Jong Kang, Min Yu, Jae Lee
  • Publication number: 20070166864
    Abstract: A mirror package is provided which can reflect a laser to an external screen according to a video signal when the laser enters from outside, and a method of manufacturing the mirror package. The mirror is packaged with a glass to protect from external contamination, an inlet and an outlet are formed by, for example, an anisotropic etching on the glass and blocks a reflected light reflected from the glass. The mirror package is formed as a set, combined on a wafer using a wafer level package and diced to individual chips. Subsequently, a productivity is improved and a ghost image or phenomenon is removed.
    Type: Application
    Filed: May 22, 2006
    Publication date: July 19, 2007
    Inventors: Seung Lee, Min Choi, Hwa Lee, Won Choi
  • Publication number: 20070087193
    Abstract: The present invention provides long-fiber reinforced polypropylene compositions comprising: (a) about 29-77 wt % of a crystalline polypropylene resin comprising about 50-100 wt % of a propylene homopolymer; (b) about 20-50 wt % of a long-fiber reinforcing material having an average fiber length of about 3-50 mm and an average diameter of about 4-30 ?m; (c) about 2-20 wt % of an elastomer, a plastomer, or a mixture thereof having a melt index as measured at 190° C. of about 20-150 g/10 min, wherein said elastomer, plastomer, or mixture thereof was polymerized by a metallocene-based catalyst; and (d) about 0.01-3 wt % of a radical initiator, wherein the ratio of the melt index as measured at 230° C. of the crystalline polypropylene resin to the melt index as measured at 190° C. of the elastomer, the plastomer, or the mixture thereof is in the range of about 0.5 to about 10.
    Type: Application
    Filed: December 15, 2005
    Publication date: April 19, 2007
    Inventors: Jae Lee, Joo Kim, Min Choi
  • Publication number: 20070070448
    Abstract: An image sensor and a method of manufacturing the image sensor, wherein the image sensor can electrically connect a light receiving portion and a printed circuit board (PCB) including circuits by forming holes and filling the holes with a conductive material, without using a wire for the electrical connection between the light receiving portion and the PCB. The light receiving portion converts lights into electrical signals and the PCB electrically processes signals. That is, since a distance for a wire between a sealing structure and because a filter is unnecessary, a thickness may be reduced. Also, since a space for wire bonding is unnecessary on the outside of an image sensor, a fill factor may increase. Also, since a process that may cause contaminates is removed, average yield may increase and production cost may decrease. The manufacturing productivity may be improved.
    Type: Application
    Filed: March 8, 2006
    Publication date: March 29, 2007
    Inventors: Kyu Jung, Min Choi, Seung Lee, Woon Kim
  • Publication number: 20060289892
    Abstract: A method for fabricating an LED having section grown on a sapphire substrate, a boded structure, and a unit chip separated from the bonded structure. The method includes (a) bonding the section grown on a first surface of the sapphire substrate to a first surface of a first substrate with a first binder; (b) bonding a second surface of the first substrate to a first surface of a second substrate with a second binder; (c) removing the second substrate from a bonded structure obtained as a result of step (b) after polishing a second surface of the sapphire substrate; (d) separating the bonded structure into unit chips after the second substrate has been removed; and (e) bonding the second surface of the polished sapphire substrate provided in each unit chip to a lead frame, and removing the first substrate. This method improves heat dissipation efficiency.
    Type: Application
    Filed: June 27, 2006
    Publication date: December 28, 2006
    Inventors: Jae Lee, Min Choi, Bu Shin, Jong Kang, Min Yu, Duk Ha, Dong Kho, Sang Chun, Suk Chang, Soo Park
  • Publication number: 20060284208
    Abstract: A light emitting diode devic that includes (a) a light emitting diode section, (b) an electrically conductive pad section being disposed outside the light emitting diode section and being electrically connected to an external power source, and (c) at least one electrically conductive interconnection section for connecting the electrically conductive pad section to one side or both sides of the light emitting diode section. In the light emitting diode device, a wire is connected to the electrically conductive pad section disposed outside the light emitting diode section, and the electrically conductive pad section is connected to one side of the light emitting diode section by means of at least one electrically conductive interconnection section, so that not only it is easy to uniformly coat a fluorescent substance, but also an area covering vertically emitted light can be reduced to enhance a light extraction efficiency of the light emitting diode device.
    Type: Application
    Filed: October 11, 2005
    Publication date: December 21, 2006
    Inventors: Jong Kang, Jae Lee, Bu Shin, Duk Ha, Min Choi, Min Yu
  • Publication number: 20060145957
    Abstract: The present invention relates to a plasma display device and a method of driving the same, where the device and the method minimize the problem of image sticking. The device and method involve applying a first sustain pulse to a first electrode and a applying a second sustain pulse to a second electrode, during a sustain period of at least one subfield, wherein the second sustain pulse includes a rising voltage interval and the first sustain pulse includes a falling voltage interval such that the rising and falling voltage intervals at least partially overlap each other.
    Type: Application
    Filed: December 16, 2005
    Publication date: July 6, 2006
    Inventors: Yang Kim, Min Choi
  • Publication number: 20060139347
    Abstract: A real-time simulation method and system for large deformations is provided. Green's nonlinear strain tensor accurately models large deformations. Modal analysis based on a linear strain tensor has been shown to be suitable for real-time simulation, but is accurate only for moderately small deformations. In the present invention, the rotational component of an infinitesimal deformation is identified, and traditional linear modal analysis is extended to track that component. And the invention develops a procedure to integrate the small rotations occurring at the nodal points. An interesting feature of the formulation is that it can implement both position and orientation constraints in a straightforward manner. These constraints can be used to interactively manipulate the shape of a deformable solid by dragging/twisting a set of nodes. Experiments show that the technique runs in real-time even for a complex model, and that it can simulate large bending and/or twisting deformations with acceptable realism.
    Type: Application
    Filed: December 23, 2005
    Publication date: June 29, 2006
    Inventors: Min Choi, Hyeong Ko
  • Publication number: 20060124939
    Abstract: A simplified manufacturing process for massive production of LEDs that have superior light emitting efficiency and superior heat discharging efficiency. The method employs a laser lift-off technique instead of the flip-chip bonding technique and it does not require a photolithography process, thereby substantially reducing the process steps and enhancing the heat discharging efficiency. The LED chips are formed as unit chips before irradiating the laser, thereby increasing the yield and realizing the mass production by preventing cleavage of the crystal structures. Heat discharging efficiency is also increased by roughening the surface of an n-type GaN layer. The light emitting area can be widened 30% more than in the flip-chip technique. Thus, the present invention serves to increase the light output and the heat discharging area, thereby drastically enhancing the performance of manufacturing high-output LEDs.
    Type: Application
    Filed: July 7, 2005
    Publication date: June 15, 2006
    Inventors: Jae Lee, Bu Shin, Min Choi, Jong Kang, Min Yu, Byung Oh
  • Publication number: 20060124941
    Abstract: Disclosed is a light emitting diode (LED) device that comprises a crystal structure of a sapphire substrate-free gallium nitride (GaN) LED, wherein the crystal structure is mounted on a first surface of a sub-mount substrate in the form of a unit chip, and the first surface of the sub-mount substrate has a surface area greater than the surface area of a region in which the unit chip is bonded. Preforms for manufacturing the LED device and a method for manufacturing the LED device are also disclosed. The sapphire substrate, on which the crystal structure of the light emitting diode has grown, is processed into a unit chip before being removed. Thus, any crack in the crystal structure of the light emitting diode that may occur during the removal of the sapphire substrate can be prevented. Therefore, a thin light emitting diode device can be manufactured in a mass production system.
    Type: Application
    Filed: December 12, 2005
    Publication date: June 15, 2006
    Inventors: Jae Lee, Bu Shin, Min Choi, Jong Kang, Min Yu, Byung Oh
  • Publication number: 20060099329
    Abstract: An apparatus for forming phosphor layers on a display panel includes a base plate on which a display panel is placed. The base plate is inclined at an adjustable angle. The display panel, having a panel plate and barrier ribs formed on the panel plate is placed on the base plate. A spray unit includes a nozzle assembly for spraying a slurry containing phosphors into spaces between the barrier ribs. A charged unit for exerting electrostatic force on the phosphors is positioned adjacent to the display panel. The apparatus enables rapid formation of uniform phosphor layers on a display panel with the phosphor particles located adjacent to the surfaces of the phosphor layers.
    Type: Application
    Filed: December 14, 2005
    Publication date: May 11, 2006
    Inventors: Hyeon O, Min Choi
  • Publication number: 20050177419
    Abstract: The present invention relates to apparatus and method of providing a multimedia advertising service through a mobile communication network. In the present invention, a content server downloads ad contents to a mobile terminal along with content-displaying condition and the mobile terminal having received the ad contents displays the received ad contents according to the content-displaying condition when an event specified by the content-displaying condition occurs. Afterwards, a content-displayed history is uploaded to the content server by the mobile terminal.
    Type: Application
    Filed: March 22, 2003
    Publication date: August 11, 2005
    Inventors: Min Choi, Kyeong Kim, Jong Choi, Sung Hong, Eon Jeong, Gi Nam
  • Publication number: 20050158079
    Abstract: A color image forming system including a photosensitive drum, a charger which charges the photosensitive drum, and a laser scanning unit which is installed below the photosensitive drum and radiates light onto the charged photosensitive drum, to form an electrostatic latent image. The system further includes a plurality of developing units with toner of at least four colors such as yellow, magenta, cyan, and black, arranged at different heights along the outer surface of the photosensitive drum to develop the electrostatic latent image with the toner when a developing roller installed in each of the developing units is maintained at a developing gap with the photosensitive drum. A transfer unit transfers the developed image onto a piece of paper, and a fusing unit is installed above the photosensitive drum and fuses the transferred image onto the piece of paper. The developing units may be arranged in the order of magenta, cyan, yellow, and black.
    Type: Application
    Filed: March 17, 2005
    Publication date: July 21, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung Kim, Vong Kim, Min Choi