Patents by Inventor Tain-Wong Hung

Tain-Wong Hung 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).

  • Method of sputtering an amorphous carbon overcoat as a protective film on magnetic recording disk
    Patent number: 5873984
    Abstract: A thin-film magnetic recording media is prepared which contains a carbon overcoat sputtered on a magnetic recording layer. The carbon overcoat is sputtered on the magnetic recording layer using a sputtering process which is conducted in a sputtering chamber having an inert gas and a mixture of nitrogen gas and hydrogen gas, wherein said nitrogen gas and hydrogen gas are provided at a mole ratio of nitrogen/hydrogen between about 0.5 and about 1. The hydrogen and nitrogen doped amorphous carbon overcoat exhibits excellent mechanical properties and tribological performance.
    Type: Grant
    Filed: November 5, 1997
    Date of Patent: February 23, 1999
    Assignee: Trace Storage Tech. Corp.
    Inventors: Fu-Wen Cheng, James Liang, Tain-Wong Hung, Hung-huei Liang