Patents by Inventor Yinshi Lui

Yinshi Lui 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).

  • Single-pole recording head having trapezoidal main pole and bevel angle promotion layer and methods of fabricating the same
    Patent number: 7253992
    Abstract: A single-pole perpendicular magnetic recording head contains a bevel angle promotion layer that facilitates the fabrication of the bevel angle in a trapezoidal main pole. The bevel angle promotion layer is made of a non-magnetic material that is softer than the material (e.g., Al2O3) that normally underlies the main pole. In one embodiment, the bevel angle promotion layer is formed between an end of the yoke and the air bearing surface (ABS), with the top surface of the bevel angle promotion layer being substantially coplanar with the top surface of the yoke. In other embodiment the bevel angle promotion layer is integrated with a leading edge taper material, which is formed of a magnetic material, to broaden the magnetic flux path between the yoke and the main pole.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: August 7, 2007
    Assignee: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Tsung Yuan Chen, Yimin Hsu, Yinshi Lui
  • Single-pole recording head having trapezoidal main pole and bevel angle promotion layer and methods of fabricating the same
    Publication number: 20060092568
    Abstract: A single-pole perpendicular magnetic recording head contains a bevel angle promotion layer that facilitates the fabrication of the bevel angle in a trapezoidal main pole. The bevel angle promotion layer is made of a non-magnetic material that is softer than the material (e.g., Al2O3) that normally underlies the main pole. In one embodiment, the bevel angle promotion layer is formed between an end of the yoke and the air bearing surface (ABS), with the top surface of the bevel angle promotion layer being substantially coplanar wit the top surface of the yoke. In other embodiment the bevel angle promotion layer is integrated with a leading edge taper material, which is formed of a magnetic material, to broaden the magnetic flux path between the yoke and the main pole.
    Type: Application
    Filed: November 4, 2004
    Publication date: May 4, 2006
    Inventors: Tsung Chen, Yimin Hsu, Yinshi Lui