Patents by Inventor Nathan Curland

Nathan Curland 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).

  • Method of making a thin-film transducer design for undershoot reduction
    Patent number: 5737826
    Abstract: A thin-film head electromagnetic transducer has two pole pieces which define a gap. The surface of at least one of the pole pieces has a linear edge defining one side of the gap and has two linear edges which are at an acute angle to the linear edge defining the gap and are symmetric about and abut at an axis perpendicular to the linear edge defining the gap.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: April 14, 1998
    Assignee: Seagate Technology, Inc.
    Inventors: Steven B. Slade, Brian S. Zak, Nathan Curland
  • Thin-film transducer design for undershoot reduction
    Patent number: 5615069
    Abstract: A thin-film head electromagnetic transducer has two pole pieces which define a gap. The surface of at least one of the pole pieces has a linear edge defining one side of the gap and has two linear edges which are at an acute angle to the linear edge defining the gap and are symmetric about and abut at an axis perpendicular to the linear edge defining the gap.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: March 25, 1997
    Assignee: Seagate Technology, Inc.
    Inventors: Steven B. Slade, Brian S. Zak, Nathan Curland
  • Thin film head with contoured pole face edges for undershoot reduction
    Patent number: 5406434
    Abstract: A thin film magnetic read/write head is manufactured using Al.sub.2 O.sub.3 dams. The Al.sub.2 O.sub.3 dams are formed using a sacrificial layer which is deposited upon a bottom pole layer. An Al.sub.2 O.sub.3 layer is deposited over the sacrificial layer. When the sacrificial layer is removed, the Al.sub.2 O.sub.3 layer forms dams between which a top pole piece is deposited. The sacrificial layer is removed using lapping and a selected chemical etch; etch of the sacrificial layer which lifts-off overlying partial lapping or chemical etch followed by chemical Al.sub.2 O.sub.3 ; depositing photoresist dams and chemically, etching the encapsulation layer and the sacrificial layer; or removal through physical or thermal shock of the Al.sub.2 O.sub.3 layer sputtered at zero bias followed by a selective chemical etch of the sacrificial layer.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: April 11, 1995
    Assignee: Seagate Technology, Inc.
    Inventors: Nurul Amin, John Bortins, Ying D. Yan, Beat G. Keel, Nathan Curland, Tim Madsen
  • Method of making a thin film head on ferrite substrate with inclined top pole
    Patent number: 5184394
    Abstract: A thin film magnetic read/write head deposited upon a magnetic substrate and including a shallow top pole take-off angle reduces leading and trailing undershoots in an isolated pulse signal. The undershoots are reduced by minimizing the magnetic discontinuities across the recording surface of the head, except for the recording gap.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: February 9, 1993
    Assignee: Seagate Technology, Inc.
    Inventors: Wei C. Hsie, Timothy A. Masaden, Nathan Curland
  • Method of making a thin film head with contoured pole face edges for undershoot reduction
    Patent number: 5137750
    Abstract: A thin film magnetic read/write head is manufactured using Al.sub.2 O.sub.3 dams. The Al.sub.2 O.sub.3 dams are formed using a sacrificial layer which is deposited upon a bottom pole layer. An Al.sub.2 O.sub.3 layer is deposited over the sacrificial layer. When the sacrificial layer is removed, the Al.sub.2 O.sub.3 layer forms dams between which a top pole piece is deposited. The sacrificial layer is removed using lapping and a selected chemical etch; partial lapping or chemical etch followed by chemical etch of the sacrificial layer which lifts-off overlying Al.sub.2 O.sub.3 ; depositing photoresist dams and chemically etching the encapsulation layer and the sacrificial layer; or removal through physical or thermal shock of the Al.sub.2 O.sub.3 layer sputtered at zero bias followed by a selective chemical etch of the sacrificial layer.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: August 11, 1992
    Assignee: Seagate Technology, Inc.
    Inventors: Nurul Amin, John Bortins, Ying D. Yan, Beat G. Keel, Nathan Curland, Tim Madsen
  • Thin film head on ferrite substrate with inclined top pole
    Patent number: 5130877
    Abstract: A thin film magnetic read/write head deposited upon a magnetic substrate and including a shallow top pole take-off angle reduces leading and trailing undershoots in an isolated pulse signal. The undershoots are reduced by minimizing the magnetic discontinuities across the recording surface of the head, except for the recording gap.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: July 14, 1992
    Assignee: Seagate Technology, Inc.
    Inventors: Wei C. Hsie, Timothy A. Madsen, Nathan Curland