Patents by Inventor Zhefei Jessie Chen

Zhefei Jessie Chen 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: 6492311
    Abstract: An ethylenediaminetetraacetic acid or a mono- di- tri- or tetraammonium salt thereof residue cleaning composition removes photoresist and other residue from integrated circuit substrates. The balance of the composition is desirably made up of water, preferably high purity deionized water, or another suitable polar solvent. A process for removing photoresist or other residue from a substrate, such as an integrated circuit semiconductor wafer including titanium metallurgy, comprises contacting the substrate with the composition for a time and at a temperature sufficient to remove the photoresist or other residue from the substrate. Use of the ethylenediaminetetraacetic acid or a mono- di- tri- or tetraammonium salt thereof in the composition and process provides superior residue removal without attacking titanium or other metallurgy, oxide or nitride layers on the substrate.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: December 10, 2002
    Assignee: EKC Technology, Inc.
    Inventors: Wai Mun Lee, Zhefei Jessie Chen
  • Patent number: 6367486
    Abstract: An ethylenediaminetetraacetic acid or a mono-, di-, tri- or tetraammonium salt thereof residue cleaning composition removes photoresist and other residue from integrated circuit substrates. The balance of the composition is desirably made up of water, preferably high purity deionized water, or another suitable polar solvent. A process for removing photoresist or other residue from a substrate, such as an integrated circuit semiconductor wafer including titanium metallurgy, comprises contacting the substrate with the composition for a time and at a temperature sufficient to remove the photoresist or other residue from the substrate. Use of the ethylenediaminetetraacetic acid or a mono-, di-, tri- or tetraammonium salt thereof in the composition and process provides superior residue removal without attacking titanium or other metallurgy, oxide or nitride layers on the substrate.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: April 9, 2002
    Assignee: EKC Technology, Inc.
    Inventors: Wai Mun Lee, Zhefei Jessie Chen
  • Publication number: 20010006936
    Abstract: An ethylenediaminetetraacetic acid or a mono- di- tri- or tetraammonium salt 5 thereof residue cleaning composition removes photoresist and other residue from integrated circuit substrates. The balance of the composition is desirably made up of water, preferably high purity deionized water, or another suitable polar solvent. A process for removing photoresist or other residue from a substrate, such as an integrated circuit semiconductor wafer including titanium metallurgy, comprises contacting the substrate with the composition for a time and at a temperature sufficient to remove the photoresist or other residue from the substrate. Use of the ethylenediaminetetraacetic acid or a mono- di- tri- or tetraammonium salt thereof in the composition and process provides superior residue removal without attacking titanium or other metallurgy, oxide or nitride layers on the substrate.
    Type: Application
    Filed: April 4, 1997
    Publication date: July 5, 2001
    Inventors: WAI MUN LEE, ZHEFEI JESSIE CHEN