Patents by Inventor Sang-hwi Choi

Sang-hwi 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).

  • Wafer manufacturing method, epitaxial wafer manufacturing method, and wafer and epitaxial wafer manufactured thereby
    Patent number: 11939698
    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: Grant
    Filed: November 3, 2020
    Date of Patent: March 26, 2024
    Assignee: SENIC INC.
    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
  • WAFER MANUFACTURING METHOD, EPITAXIAL WAFER MANUFACTURING METHOD, AND WAFER AND EPITAXIAL WAFER MANUFACTURED THEREBY
    Publication number: 20240076799
    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 1, 2023
    Publication date: March 7, 2024
    Applicant: SENIC INC.
    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
  • Vacuum cleaner
    Patent number: D730000
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: May 19, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dongwon Cheon, Eui-ju Lee, Tae-hoon Lee, Sang-hwi Choi
  • Vacuum cleaner
    Patent number: D730003
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: May 19, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dongwon Cheon, Eui-ju Lee, Tae-hoon Lee, Sang-hwi Choi
  • Vacuum cleaner
    Patent number: D731724
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: June 9, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dongwon Cheon, Eui-ju Lee, Tae-hoon Lee, Sang-hwi Choi
  • Vacuum cleaner
    Patent number: D732253
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: June 16, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dongwon Cheon, Eui-ju Lee, Tae-hoon Lee, Sang-hwi Choi
  • Refrigerator
    Patent number: D933722
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: October 19, 2021
    Assignee: WINIADIMCHAE CO., LTD.
    Inventors: Myung Dong You, Sang Hwi Choi, Sung Jin Lee, Eun Sol Lee