Patents by Inventor Cheng-Der Lin

Cheng-Der Lin 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: 6103339
    Abstract: Nowadays, in fabricating a magnetic recording medium, a disk substrate is first mechanically polished to form an even surface. Next, a laser texturing process is performed to produce a textured annular landing zone on the disk substrate. A magnetic layer is then formed on the disk substrate to complete the fabrication process. However, abnormal asperity usually remains on the surface of the disk substrate. Further, as the amount of exposure time in the air increases, an oxide film is inevitably formed on the surface of the disk substrate. Both of them degrade the surface smooth of the disk substrate, resulting in poor control of the size and structure of the laser texture. In addition, due to the irregular distribution of the mechanical polished texture on the disk substrate, a subsequently formed magnetic layer can not easily achieve the desired properties. This invention therefore provides a light texture process for fabricating a magnetic recording medium.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: August 15, 2000
    Assignee: Trace Storage Technology Corporation
    Inventors: Cheng-Der Lin, Jason S. Lin, Yuan-Ming Chang, An-Hung Tan