Patents by Inventor Mike Tregoning

Mike Tregoning 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).

  • Magnetic recording media having CrTiX underlayers to reduce circumferential/radial anisotropy and methods for their production
    Patent number: 6218033
    Abstract: The present invention provides magnetic recording media comprising a rigid substrate and an underlayer disposed over the substrate, in which the underlayer comprises CrTiCu or CrTiV. A magnetic layer is disposed over this underlayer, and is also disposed over a texturized surface. Generally, the substrate comprises aluminum, and an NiP layer is disposed over the substrate and below the underlayer. The texture will typically be imposed on this NiP layer. Advantageously, the CrTiCu or CrTiV underlayer has been found to compensate for texture-induced anisotropy, limiting a ratio of circumferential coercivity to radial coercivity within the range between about 0.8 and 1.25.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: April 17, 2001
    Assignee: Akashic Memories Corporation
    Inventors: Wei Cao, James Ward, Mike Tregoning, Xingbo Yang