Patents by Inventor Gautam Mohan Khera

Gautam Mohan Khera 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 head having a bilayer pole tip
    Patent number: 7085100
    Abstract: A magnetic head having improved overwrite capabilities and reduced fringing fields are described along with methods of making the same. The magnetic head has a first pole piece and a second pole piece. The first pole piece includes a first bottom pole piece layer, a pedestal portion formed over the first bottom pole piece layer, and a notched top pole portion formed over the pedestal portion. A gap layer separates the second pole piece from the notched top pole portion. The pedestal portion has a first saturation magnetization MS1 and the top pole portion has a second saturation magnetization MS2 that is greater than the first saturation magnetization MS1. The top pole portion has a substantially planar top surface over which a portion of the gap layer and the second pole piece are formed.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: August 1, 2006
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Tom King Harris, III, Wen-chien David Hsiao, Gautam Mohan Khera, David Kaimon Lee, Edward Hin Pong Lee, Hugo Alberto Emilio Santini, Samuel Wei-san Yuan
  • Magnetic head having a pole piece with a double pedestal structure
    Patent number: 6989964
    Abstract: A magnetic head which includes a pole piece with a double pedestal structure has improved overwrite capabilities and reduced fringing fields. The magnetic head has first and second pole pieces and a gap layer which separates the first and the second pole pieces. The first pole piece includes a first pole piece layer, a bottom pedestal portion formed over the first pole piece layer at an air bearing surface (ABS), and a top pedestal portion formed over the bottom pedestal portion. The top pedestal portion has a thickness that is no more than half of that of the bottom pedestal portion and a length that is no more than half of that of the bottom pedestal portion. Advantageously, a throat height of the magnetic head is reduced from use of the top pedestal portion whereas the mechanical reliability of the first pole piece is increased from use of the bottom pedestal portion.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: January 24, 2006
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yimin Hsu, Gautam Mohan Khera, Yong Shen
  • Magnetic head having a pole piece with a double pedestal structure
    Publication number: 20040252410
    Abstract: A magnetic head which includes a pole piece with a double pedestal structure has improved overwrite capabilities and reduced fringing fields. The magnetic head has first and second pole pieces and a gap layer which separates the first and the second pole pieces. The first pole piece includes a first pole piece layer, a bottom pedestal portion formed over the first pole piece layer at an air bearing surface (ABS), and a top pedestal portion formed over the bottom pedestal portion. The top pedestal portion has a thickness that is no more than half of that of the bottom pedestal portion and a length that is no more than half of that of the bottom pedestal portion. Advantageously, a throat height of the magnetic head is reduced from use of the top pedestal portion whereas the mechanical reliability of the first pole piece is increased from use of the bottom pedestal portion.
    Type: Application
    Filed: June 16, 2003
    Publication date: December 16, 2004
    Inventors: Yimin Hsu, Gautam Mohan Khera, Yong Shen
  • Magnetic head having a bilayer pole tip and method of making the same
    Publication number: 20030179497
    Abstract: A magnetic head having improved overwrite capabilities and reduced fringing fields are described along with methods of making the same. The magnetic head has a first pole piece and a second pole piece. The first pole piece includes a first bottom pole piece layer, a pedestal portion formed over the first bottom pole piece layer, and a notched top pole portion formed over the pedestal portion. A gap layer separates the second pole piece from the notched top pole portion. The pedestal portion has a first saturation magnetization MS1 and the top pole portion has a second saturation magnetization MS2 that is greater than the first saturation magnetization MS1. The top pole portion has a substantially planar top surface over which a portion of the gap layer and the second pole piece are formed.
    Type: Application
    Filed: March 19, 2002
    Publication date: September 25, 2003
    Inventors: Tom King Harris, Wen-chien David Hsiao, Gautam Mohan Khera, David Kaimon Lee, Edward Hin Pong Lee, Hugo Alberto Emilio Santini, Samuel Wei-san Yuan