Patents by Inventor Mi-Young Im

Mi-Young Im 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).

  • High density magnetic recording medium having uniform local coercivity distribution and grain size distribution and fine grains and manufacturing method thereof
    Patent number: 7294419
    Abstract: Disclosed is herein a magnetic recording medium useful for high density magnetic recording, which contains an optimum composition of Pt so as to have a uniform local coercivity distribution and grain size distribution, and fine grains, and a method of manufacturing the same. The magnetic recording medium includes a 400 ? (Co82Cr18)100-xPtx/1100 ? Ti alloy thin film containing 1 to 14 atom % Pt. Additionally, the method includes a first step of layering a Ti thin film on a glass substrate, a second step of depositing a CoCrPt alloy thin film on the Ti thin film, and a third step of depositing Si3N4 on the CoCrPt alloy thin film. At this time, the CoCrPt alloy thin film contains a predetermined composition of Pt controlled by a CoCr alloy target having a Pt chip positioned thereon. Thereby, the magnetic recording medium having microscopic magnetic property and structural property suitable to a high density magnetic recording medium is realized.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: November 13, 2007
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Sung-Chul Shin, Mi-Young Im
  • High density magnetic recording medium having uniform local coercivity distribution and grain size distribution and fine grains and manufacturing method thereof
    Publication number: 20040170869
    Abstract: Disclosed is herein a magnetic recording medium useful for high density magnetic recording, which contains an optimum composition of Pt so as to have a uniform local coercivity distribution and grain size distribution, and fine grains, and a method of manufacturing the same. The magnetic recording medium includes a 400 Å (Co82Cr18)100-xPtx/1100 Å Ti alloy thin film containing 1 to 14 atom % Pt. Additionally, the method includes a first step of layering a Ti thin film on a glass substrate, a second step of depositing a CoCrPt alloy thin film on the Ti thin film, and a third step of depositing Si3N4 on the CoCrPt alloy thin film. At this time, the CoCrPt alloy thin film contains a predetermined composition of Pt controlled by a CoCr alloy target having a Pt chip positioned thereon. Thereby, the magnetic recording medium having microscopic magnetic property and structural property suitable to a high density magnetic recording medium is realized.
    Type: Application
    Filed: September 29, 2003
    Publication date: September 2, 2004
    Inventors: Sung-Chul Shin, Mi-Young Im