Patents by Inventor Changsik Song

Changsik Song 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: 10685844
    Abstract: Provided are a hardmask composition, a method of forming a pattern using the hardmask composition, and a hardmask formed using the hardmask composition. The hardmask composition includes a polar nonaqueous organic solvent and one of: i) a mixture of graphene quantum dots and at least one selected from a diene and a dienophile, ii) a Diels-Alder reaction product of the graphene quantum dots and the at least one selected from a diene and a dienophile, iii) a thermal treatment product of the Diels-Alder reaction product of graphene quantum dots and the at least one selected from a diene and a dienophile, or iv) a combination thereof.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: June 16, 2020
    Assignees: Samsung Electronics Co., Ltd., Research & Business Foundation, Sungkyunkwan University
    Inventors: Sangwon Kim, Changsik Song, Dongcheol Jeong, Minsu Seol, Hyeonjin Shin, Dongwook Lee, Taewoo Kim, Juhyen Lee, Hyejin Cho
  • Publication number: 20190035635
    Abstract: Provided are a hardmask composition, a method of forming a pattern using the hardmask composition, and a hardmask formed using the hardmask composition. The hardmask composition includes a polar nonaqueous organic solvent and one of: i) a mixture of graphene quantum dots and at least one selected from a diene and a dienophile, ii) a Diels-Alder reaction product of the graphene quantum dots and the at least one selected from a diene and a dienophile, iii) a thermal treatment product of the Diels-Alder reaction product of graphene quantum dots and the at least one selected from a diene and a dienophile, or iv) a combination thereof.
    Type: Application
    Filed: July 16, 2018
    Publication date: January 31, 2019
    Applicants: Samsung Electronics Co., Ltd., Research & Business Foundation SUNGKYUNKWAN UNIVERSITY
    Inventors: Sangwon KIM, Changsik SONG, Dongcheol JEONG, Minsu SEOL, Hyeonjin SHIN, Dongwook LEE, Taewoo KIM, Juhyen LEE, Hyejin CHO
  • Patent number: 7985594
    Abstract: The present invention provides methods for performing dynamic nuclear polarization using biradicals with a structure of formula (I) as described herein. In general, the methods involve (a) providing a frozen sample in a magnetic field, wherein the frozen sample includes a biradical of formula (I) and an analyte with at least one spin half nucleus; (b) polarizing the at least one spin half nucleus of the analyte by irradiating the frozen sample with radiation having a frequency that excites electron spin transitions in the biradical; (c) optionally melting the sample to produce a molten sample; and (d) detecting nuclear spin transitions in the at least one spin half nucleus of the analyte in the frozen or molten sample. The present invention also provides biradicals with a structure of formula (I) with the proviso that Q1 and Q2 are different when X1 and X2 are —O—. The present invention also provides methods for making biradicals with a structure of formula (IA) as described herein.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: July 26, 2011
    Assignee: Massachusetts Institute of Technology
    Inventors: Robert G. Griffin, Kan-Nian Hu, Timothy M. Swager, Changsik Song, Eric Dane
  • Publication number: 20090302842
    Abstract: The present invention provides methods for performing dynamic nuclear polarization using biradicals with a structure of formula (I) as described herein. In general, the methods involve (a) providing a frozen sample in a magnetic field, wherein the frozen sample includes a biradical of formula (I) and an analyte with at least one spin half nucleus; (b) polarizing the at least one spin half nucleus of the analyte by irradiating the frozen sample with radiation having a frequency that excites electron spin transitions in the biradical; (c) optionally melting the sample to produce a molten sample; and (d) detecting nuclear spin transitions in the at least one spin half nucleus of the analyte in the frozen or molten sample. The present invention also provides biradicals with a structure of formula (I) with the proviso that Q1 and Q2 are different when X1 and X2 are —O—. The present invention also provides methods for making biradicals with a structure of formula (IA) as described herein.
    Type: Application
    Filed: May 10, 2007
    Publication date: December 10, 2009
    Applicant: Massachusetts Institute of Tecnology
    Inventors: Robert G. Griffin, Kan-Nian Hu, Timothy M. Swager, Changsik Song, Eric Dane