Patents by Inventor Kyu-Sang Ahn

Kyu-Sang Ahn 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).

  • SILICON-ETCHANT COMPOSITION AND METHOD OF FORMING PATTERN USING THE SAME
    Publication number: 20240287383
    Abstract: A silicon-etchant composition according to an embodiment may include quaternary alkyl ammonium hydroxide, an amine-based compound, and two or more types of nonionic surfactants represented by Chemical Formula 1 and having different lengths of a hydrophilic group. Accordingly, the silicon-etchant composition having improved etch rate and etching selectivity is provided.
    Type: Application
    Filed: February 14, 2024
    Publication date: August 29, 2024
    Inventors: JIN KYU ROH, KYU SANG AHN, HYO JOONG YOON
  • ETCHANT COMPOSITION, AND METHOD OF FORMING PATTERN USING THE SAME, AND METHOD OF FABRICATING ARRAY SUBSTRATE USING THE SAME
    Publication number: 20240034932
    Abstract: An etchant composition contains (A) an alkaline compound, (B) an organoaluminum, and (C) water. The composition may be used in a method of forming a pattern. The composition also may be used in a method of fabricating an array substrate.
    Type: Application
    Filed: July 27, 2022
    Publication date: February 1, 2024
    Inventors: Jin-Kyu Roh, Ji-Won Kim, Kyu-Sang Ahn