Patents by Inventor Devendra P. Rathi

Devendra P. Rathi 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 moment and high permeability transducer structures and formation
    Patent number: 6296955
    Abstract: Magnetically permeable, high magnetic saturation, primarily iron NiFe alloys are formed on thin seed layers by sputtering and electroplating. Pole layers a few microns in thickness can be formed of magnetically superlative, primarily iron NiFe alloys in this manner for transducers that may be used in information storage systems. The seed layers may include Ni0.55Fe0.45 or Cr, and the magnetically superlative NiFe alloy may be Ni0.45Fe0.55. The magnetically superlative NiFe alloy has increased concentration of a body centered cubic crystalline phase and/or a decreased concentration of a face centered cubic crystalline phase compared with conventional Ni0.45Fe0.55. A laminated pole structure has a dielectric interlayer along with seed layers and magnetically superlative, primarily iron NiFe layers.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: October 2, 2001
    Assignee: Read-Rite Corporation
    Inventors: Syed A. Hossain, Mark S. Miller, Devendra P. Rathi