Patents Assigned to SKC Co., Ltd.
  • METHOD OF MANUFACTURING SILICON CARBIDE INGOT AND SYSTEM FOR MANUFACTURING SILICON CARBIDE INGOT
    Publication number: 20210372003
    Abstract: A method of manufacturing a silicon carbide ingot, includes a preparing operation of adjusting internal space of a reactor in which silicon carbide raw materials and a seed crystal are disposed to have a high vacuum atmosphere, a proceeding operation of injecting an inert gas into the internal space, heating the internal space by moving a heater surrounding the reactor to induce the silicon carbide raw materials to sublimate, and growing the silicon carbide ingot on the seed crystal, and a cooling operation of cooling the temperature of the internal space to room temperature. The moving of the heater has a relative position which becomes more distant at a rate of 0.1 mm/hr to 0.48 mm/hr based on the seed crystal.
    Type: Application
    Filed: May 25, 2021
    Publication date: December 2, 2021
    Applicant: SKC Co., Ltd
    Inventors: Byung Kyu JANG, Jong Hwi PARK, Eun Su YANG, Jung Woo CHOI, Sang Ki KO, Kap-Ryeol KU, Jung-Gyu KIM
  • WAFER MANUFACTURING METHOD, EPITAXIAL WAFER MANUFACTURING METHOD, AND WAFER AND EPITAXIAL WAFER MANUFACTURED THEREBY
    Publication number: 20210372005
    Abstract: A wafer manufacturing method, an epitaxial wafer manufacturing method, and a wafer and epitaxial wafer manufactured thereby, are provided. The wafer manufacturing method enables the manufacture of a wafer with a low density of micropipe defects and minimum numbers of particles and scratches. The epitaxial wafer manufacturing method enables the manufacture of an epitaxial wafer that has low densities of defects such as downfall, triangular, and carrot defects, exhibits excellent device characteristics, and improves the yield of devices.
    Type: Application
    Filed: November 3, 2020
    Publication date: December 2, 2021
    Applicant: SKC Co., Ltd.
    Inventors: Jong Hwi PARK, Jung-Gyu KIM, Eun Su YANG, Byung Kyu JANG, Jung Woo CHOI, Yeon Sik LEE, Sang Ki KO, Kap-Ryeol KU
  • Method for reproducing polyester container and polyester film used in the method
    Patent number: 11155691
    Abstract: Embodiments relate to a process for regenerating a polyester container and a polyester film to be used therein, which not only solve the environmental problems by improving the recyclability of polyester containers, but also are capable of enhancing the quality, yield, and productivity. The process for regenerating a polyester container comprises providing the polyester container and a heat-shrunken polyester film that wraps at least part of the polyester container; crushing the polyester container and the heat-shrunken film to obtain flakes; and thermally treating the flakes to produce regenerated polyester chips, wherein when the flakes are thermally treated at a temperature of 200° C. to 220° C.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: October 26, 2021
    Assignees: SKC CO., LTD., SKC INC.
    Inventors: Chul Kyu Kim, Yongdeuk Kim, Joo Ho Yang
  • Method and apparatus for releasing molded article from mold
    Patent number: 11155006
    Abstract: In the method and the apparatus for releasing a molded article from a mold according to the embodiments, the lateral of the molded article in the mold is pressed, so that it is possible to minimize the damage of the mold and the molded article at the time of the release, while the amount of a mold release agent used is minimized.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: October 26, 2021
    Assignee: SKC CO., LTD.
    Inventors: Junghwan Shin, Jung Hwan Myung, Hyuk Hee Han, Jongmin Shim
  • Method for preparing graphite sheet
    Patent number: 11155466
    Abstract: The embodiment relates to a method for preparing a graphite sheet having a high thermal conductivity at a low cost without using an expensive polyimide film.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: October 26, 2021
    Assignee: SKC CO., LTD.
    Inventors: Jung Doo Seo, Jung-Gyu Kim, Jonggab Baek
  • FILM FOR GLASS LAMINATION, METHOD FOR MANUFACTURING SAME, LAMINATED GLASS COMPRISING SAME, AND TRANSPORTATION MEANS COMPRISING SAME
    Publication number: 20210323277
    Abstract: A glass lamination film includes a tinted zone in which one or more colored layers are disposed and a clear zone. The tinted zone includes a colored zone with a fixed color and a color change zone disposed between the colored zone and the clear zone, and a color of the color change zone has a varying density. A fade off zone has relative transmittance (Rt, %) of 30 to 80%. The color change zone includes the fade off zone having a distance of 15 to 25 mm. The colored layer includes a first colored layer and a second colored layer disposed below the first colored layer. An amount of plasticizer in the second colored layer is larger than an amount of the plasticizer in the first colored layer.
    Type: Application
    Filed: June 30, 2021
    Publication date: October 21, 2021
    Applicant: SKC Co., Ltd.
    Inventors: Hyejin KIM, Kyuhun KIM
  • METHOD AND SYSTEM FOR PRODUCING SILICON CARBIDE INGOT
    Publication number: 20210317593
    Abstract: A silicon carbide ingot producing method is provided. The method produces a silicon carbide ingot in which an internal space of a reactor is depressurized and heated to create a predetermined difference in temperature between upper and lower portions of the internal space. The method produces a silicon carbide ingot in which a plane of a seed crystal corresponding to the rear surface of the silicon carbide ingot is lost minimally. Additionally, the method produces a silicon carbide ingot with few defects and good crystal quality.
    Type: Application
    Filed: November 3, 2020
    Publication date: October 14, 2021
    Applicant: SKC Co., Ltd.
    Inventors: Jong Hwi PARK, Eun Su YANG, Byung Kyu JANG, Jung Woo CHOI, Sang Ki KO, Kap-Ryeol KU, Jung-Gyu KIM
  • GLASS WITH GLASS LAMINATION FILM
    Publication number: 20210308992
    Abstract: A film for glass lamination includes a metal salt or a metal ion. A first absolute value in a gradient of concentration of metal ions within a depth of 6 to 45 nm from a surface of the film is greater than a second absolute value in the gradient of the concentration of the metal ions within a depth of 86 to 125 nm from the surface. A first average value of the concentration of the metal ions within the depth of 6 to 45 nm is 2.5 times or more than a second average value of the concentration of the metal ions within the depth of 86 to 125 nm.
    Type: Application
    Filed: June 18, 2021
    Publication date: October 7, 2021
    Applicant: SKC Co., Ltd.
    Inventors: Hyejin KIM, Kyuhun KIM
  • Polarizer protective film, polarizing plate, and display device comprising same
    Patent number: 11137523
    Abstract: Embodiments relate to a protective film for a polarizer, a polarizing plate, and a display device comprising the same. The protective film for a polarizer according to the embodiments is improved in mechanical strength and minimized in rainbow strains by minimizing the difference in the orientation angle between the center and the edge of the film while generating a difference in the strengths in the longitudinal/transverse directions of the film. Hence, it can be advantageously used as a protective film for a polarizer.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: October 5, 2021
    Assignee: SKC CO., LTD.
    Inventors: Dawoo Jeong, Jang Won Lee, Young Min Heo, Ho Chun Kang, Sechul Lee
  • FILM FOR GLASS LAMINATION AND METHOD FOR PREPARING SAME
    Publication number: 20210291495
    Abstract: The film for glass lamination of the present disclosure comprises a polyvinyl acetal resin, a plasticizer, and a metal salt, wherein the film has an adhesion control effect of 8.5 kgf/cm2 or more per the metal salt in an amount of 10 ppm based on a total weight of the film.
    Type: Application
    Filed: June 7, 2021
    Publication date: September 23, 2021
    Applicant: SKC Co., Ltd.
    Inventors: Hyejin KIM, Haksoo LEE
  • Film defect detection method and system
    Patent number: 11127134
    Abstract: The present specification provides a film defect detection system. The film defect detection system may comprise an image acquisition unit configured to acquire an image of a film in a manufacturing process of the film; a defect detection unit configured to detect defects in the film by analyzing the acquired image of the film, using a machine learning algorithm learned to detect a defect in advance, when receiving the acquired image of the film; and an information output unit configured to output information on the defects in the film detected by the defect detection unit.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: September 21, 2021
    Assignee: SKC CO., LTD.
    Inventors: Il Taek Hong, In Suk Oh, Hyeon Guk Kim, Kwang Seok Oh
  • Heat-resistant resin composition and molded article obtained therefrom
    Patent number: 11124648
    Abstract: Embodiments relate to a heat-resistant resin composition having an enhanced heat resistance and a molded article obtained therefrom. The resin composition according to the embodiments has a high heat resistance, so that it is capable of forming an excellent appearance without being deformed even though it is subjected to a process that is carried out at a high temperature of 205° C. or higher, such as an on-line painting. Thus, it can be advantageously used as, for example, an exterior material of various transportation means or a housing of electric and electronic products.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: September 21, 2021
    Assignee: SKC CO., LTD.
    Inventors: Jae Sung Han, Jin Kyung Kim, Dohoon Chang
  • WAFER, EPITAXIAL WAFER, METHOD FOR MANUFACTURING A WAFER AND METHOD FOR MANUFACTURING AN EPITAXIAL WAFER
    Publication number: 20210272793
    Abstract: An epitaxial wafer including a wafer having one surface and an other surface, and an epitaxial layer formed on the one surface of the wafer, wherein a roughness skewness (Rsk) of the one surface is ?3 nm to 3 nm, and a roughness average (Ra) of an edge area of the one surface is different from that of a central area of the one surface by ?2 nm to 2 nm when the edge area of the one surface is defined as an area between 13.3% and 32.1% of the radius of the wafer in a direction from the edge of the one surface toward the center thereof and the central area of the one surface is defined as an area at 9.4% of the radius of the wafer from the center of the one surface.
    Type: Application
    Filed: January 14, 2021
    Publication date: September 2, 2021
    Applicant: SKC Co., Ltd.
    Inventors: Jong Hwi PARK, Sang Ki KO, Kap-Ryeol KU, Jung-Gyu KIM, Eun Su YANG, Yeon Sik LEE
  • Polyester single layer film
    Patent number: 11084900
    Abstract: A polyester single layer film according to an embodiment of the present invention has low haze and low oligomer characteristics, has a more bluish color coordinate, and has a low inorganic metal content. Accordingly, the polyester single layer film may be used as a base film of a heat-resistant protective film and a light-scattering preventive film, as well as an ITO and non-ITO base film (for Ag nanowire, or the like) used in recent touch panels. In addition, since the transmittance at a wavelength of 550 nm is relatively high due to less impurity, the polyester single layer film may be used as a base film of a prism for a backlight unit (BLU) and a diffusion sheet.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: August 10, 2021
    Assignee: SKC CO., LTD.
    Inventors: Ki-Yuel Kwak, Jung Kyu Lee, Seungwon Lee, Hojin Yu
  • Apparatus for producing an ingot comprising a crucible body with a lid assembly having a movable core member and method for producing silicon carbide ingot using the apparatus
    Patent number: 11078599
    Abstract: An apparatus for producing an ingot includes a crucible body having an opening and in which raw materials are accommodated, and a lid assembly located at the opening and having a portion fixed to the crucible body. The lid assembly includes a placement hole having open upper and lower ends, a frame member arranged along a periphery of the opening while surrounding a periphery of the placement hole, and a core member located in the placement hole and movable upward and downward with respect to the frame member.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: August 3, 2021
    Assignee: SKC Co., Ltd.
    Inventors: Byung Kyu Jang, Jung-Gyu Kim, Jung Woo Choi, Kap-Ryeol Ku, Sang Ki Ko
  • HEAT SHRINKABLE FILM AND PREPARATION METHOD THEREOF
    Publication number: 20210221546
    Abstract: A heat shrinkable film shows a heat shrinkage rate in the direction perpendicular to the main shrinkage direction that is not high even at high temperature and is printable thereon. The heat shrinkable film includes a polyester resin, wherein the heat shrinkage characteristics in the direction perpendicular to the main shrinkage direction satisfy the following Relationships 1 and 2: ?15??T70-65?0??Relationship 1 0??T100-95?5??Relationship 2 wherein ?TX-Y is a value obtained by subtracting heat shrinkage rate of the heat shrinkable film in the direction perpendicular to the main shrinkage direction after the heat shrinkable film is immersed in water bath for 10 seconds at Y° C. from heat shrinkage rate of the heat shrinkable film in the direction perpendicular to the main shrinkage direction after the heat shrinkable film is immersed in water bath for 10 seconds at X° C.
    Type: Application
    Filed: March 31, 2021
    Publication date: July 22, 2021
    Applicant: SKC CO., LTD.
    Inventors: Chul Kyu KIM, Yongdeuk KIM
  • Graphite sheet and method for manufacturing same
    Patent number: 11040516
    Abstract: The present invention provides a graphite sheet having a ratio of thermal diffusivity in horizontal and vertical directions of 300 or more. Also, the present invention provides a graphite sheet having a ratio of thermal diffusivity in a vertical direction of 2.0 mm2/s or less. The graphite sheet has excellent thermal conductivity in horizontal and vertical directions and excellent flexibility at the same time and can be produced at low manufacturing cost, thereby holding an economic advantage.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: June 22, 2021
    Assignee: SKC CO., LTD.
    Inventors: Ki Ryun Park, Myung-Ok Kyun, Jung-Gyu Kim, Jung Doo Seo, Jonggab Baek, Jong Hwi Park, Jun Rok Oh
  • METHOD FOR PREPARING POLYVINYLBUTYRAL RESIN COMPOSITION, AND GLASS- ADHESIVE FILM COMPRISING SAME
    Publication number: 20210155725
    Abstract: A method of producing a polyvinyl butyral resin composition including: preparing a reaction composition including i) a polyvinyl alcohol resin, ii) a butanal, and iii) a butanoic acid; and obtaining the polyvinyl butyral resin composition, wherein a conversion rate of butanal is 77% or more.
    Type: Application
    Filed: February 4, 2021
    Publication date: May 27, 2021
    Applicant: SKC Co., Ltd.
    Inventors: Hyejin KIM, Jiyeon RYU, Jooyoung JUNG, Haksoo LEE
  • FILM FOR GLASS LAMINATION, COMPOSITION FOR FILM FOR GLASS LAMINATION, AND LAMINATED GLASS COMPRISING SAME
    Publication number: 20210154982
    Abstract: A film for laminating glass including: a first surface layer; a second surface layer disposed opposite to the first surface layer; and at least one sound insulating layer disposed between the first surface layer and the second surface layer, wherein the film for laminating glass has a L/F value reduction rate [G_L/F(A,B)] of 0.045/° C. or less at a temperature range of 20 to 35° C.
    Type: Application
    Filed: February 4, 2021
    Publication date: May 27, 2021
    Applicant: SKC Co., Ltd.
    Inventors: Hyejin KIM, Kyuhun KIM, Sungjin CHUNG
  • Method for reproducing polyester container and reproduced polyester chip prepared therefrom
    Patent number: 11008435
    Abstract: Embodiments relate to a process for regenerating a polyester container and regenerated polyester chips prepared therefrom. The process comprises preparing a polyester container provided with a heat shrinkable film; crushing the container provided with the heat shrinkable film to obtain flakes; and thermally treating the flakes to produce regenerated polyester chips, wherein when the flakes are thermally treated at a temperature of 200° C. to 220° C. for 60 minutes to 120 minutes, the clumping fraction is 5% or less, and the flakes comprise first flakes obtained by crushing the container and second flakes obtained by crushing the heat shrinkable film. It not only solves the environmental problems by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: May 18, 2021
    Assignees: SKC INC., SKC CO., LTD.
    Inventors: Daeyong Shin, Yongdeuk Kim, Jung Kyu Lee, Jaehyong Son, Eugene Jung