Patents by Inventor Laurence S. Samuelson

Laurence S. Samuelson 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).

  • Patent number: 7548793
    Abstract: A disposition process involves a part proceeding through a sequence of fabrication steps. The process involves obtaining a specified parameter for the part at an individual fabrication step; measuring the specified parameter of the part at the individual fabrication step; obtaining a final specified parameter for the part upon completion of the sequence of fabrication steps; and disposing the part at the individual fabrication step. Disposing the part uses a calculation of probability of the part meeting the final specified parameter.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: June 16, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Stephen L. Eichblatt, Laurence S. Samuelson
  • Publication number: 20080015725
    Abstract: A disposition process involves a part proceeding through a sequence of fabrication steps. The process involves obtaining a specified parameter for the part at an individual fabrication step; measuring the specified parameter of the part at the individual fabrication step; obtaining a final specified parameter for the part upon completion of the sequence of fabrication steps; and disposing the part at the individual fabrication step. Disposing the part uses a calculation of probability of the part meeting the final specified parameter.
    Type: Application
    Filed: July 14, 2006
    Publication date: January 17, 2008
    Inventors: Stephen L. Eichblatt, Laurence S. Samuelson
  • Patent number: 6421908
    Abstract: A shallow etch at the trailing edge rail that allows the slider to fly closer to the recording medium and exhibit less sensitivity to roll. The slider includes a support structure and at least one rail having side edges and an air bearing surface raised above the support structure. At least one of the rails comprises a magnetic element disposed on the support structure. The edges of the rail adjacent to the magnetic element are etched to minimize the fly height of the magnetic element over the disk while preventing collision of the rail with the disk during roll conditions. The etched features of the rail create relieved trailing edge portions where the edges of the rail adjacent to the magnetic element are lower than the air bearing surface but are higher than the support structure. The shallow etch in the air bearing surface minimizes the difference between the minimum mechanical slider/disk spacing and the magnetic head/disk spacing which in turn allows optimization of transducer spacing.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: July 23, 2002
    Assignee: International Business Machines Corporation
    Inventors: Sanford A. Bolasna, Laurence S. Samuelson
  • Patent number: 5825587
    Abstract: A shallow etch at the trailing edge rail that allows the slider to fly closer to the recording medium and exhibit less sensitivity to roll. The slider includes a support structure and at least one rail having side edges and an air bearing surface raised above the support structure. At least one of the rails comprises a magnetic element disposed on the support structure. The edges of the rail adjacent to the magnetic element are etched to minimize the fly height of the magnetic element over the disk while preventing collision of the rail with the disk during roll conditions. The etched features of the rail create relieved trailing edge portions where the edges of the rail adjacent to the magnetic element are lower than the air bearing surface but are higher than the support structure. The shallow etch in the air bearing surface minimizes the difference between the minimum mechanical slider/disk spacing and the magnetic head/disk spacing which in turn allows optimization of transducer spacing.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: October 20, 1998
    Assignee: International Business Machines Corporation
    Inventors: Sanford A. Bolasna, Laurence S. Samuelson
  • Patent number: 5796550
    Abstract: A diverging rail edge geometry for an air bearing slider. The air bearing slider provides reduced sensitivity to skew and roll static attitude without contributing to significant increases in cost and complexity. A support structure is formed with an air bearing surface having at least one air bearing rail, pad or other structure disposes thereon. The air bearing pad or rail is formed having at least one edge diverging from the side edges of the support structure. The edges of the rails may also be curved.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: August 18, 1998
    Assignee: International Business Machines Corporation
    Inventors: Timothy C. O'Sullivan, Laurence S. Samuelson, Howell B. Schwartz
  • Patent number: 5796551
    Abstract: Air bearing sliders having landing pads to provide a smooth contact surface during shock or loading and unloading. The contact surface is smoother than the etched surface area of the slider. The air bearing slider includes a support structure, an air bearing surface disposed on the support structure above the etched surface area and facing the moving recording medium, for providing a pressurization plane for providing lift to the slider, and a landing pad, coupled to the support structure, for providing a contact surface, wherein the contact surface of the landing pad is smoother than the etched surface area. The contact surface of the landing pad may be below or within the pressurization plane of the air bearing surface. A landing pad may be disposed at an outer corner of the slider to provide a smooth contact surface during skew conditions. The landing pad may also be formed in conjunction with the formation of air bearing surface features such as TPC steps, stepped tapers or trailing edge rail shaping.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: August 18, 1998
    Assignee: International Business Machines Corporation
    Inventor: Laurence S. Samuelson
  • Patent number: 5610784
    Abstract: Disclosed is a negative pressure air bearing slider having at least one trailing edge pocket defined by a generally U-shaped rail open to the trailing edge of the slider, and at least one leading edge pocket defined by a generally U-shaped rail open to the leading edge of the slider. Also disclosed is a method for determining an optimal width for a leading edge pocket of predetermined length and depth to provide a flat fly height profile in combination with a trailing edge pocket of predetermined dimensions. For a given trailing edge pocket configuration, width optimization is achieved by constructing a number of prototype sliders, each having a unique leading to trailing edge pocket width ratio; measuring the inner and outer diameter fly heights for each prototype to obtain ID and OD fly height profile curves; and determining a leading edge pocket width corresponding to the point of intersection of the curves.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: March 11, 1997
    Assignee: International Business Machines Corporation
    Inventors: Lee K. Dorius, Laurence S. Samuelson
  • Patent number: 5587858
    Abstract: Disclosed is a negative pressure air bearing slider having at least one trailing edge pocket defined by a generally U-shaped rail open to the trailing edge of the slider, and at least one leading edge pocket defined by a generally U-shaped rail open to the leading edge of the slider. Also disclosed is a method for determining an optimal width for a leading edge pocket of predetermined length and depth to provide a flat fly height profile in combination with a trailing edge pocket of predetermined dimensions. For a given trailing edge pocket configuration, width optimization is achieved by constructing a number of prototype sliders, each having a unique leading to trailing edge pocket width ratio; measuring the inner and outer diameter fly heights for each prototype to obtain ID and OD fly height profile curves; and determining a leading edge pocket width corresponding to the point of intersection of the curves.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 24, 1996
    Assignee: International Business Machines Corporation
    Inventors: Lee K. Dorius, Laurence S. Samuelson
  • Patent number: 5583722
    Abstract: Disclosed is a negative pressure air bearing slider having at least one trailing edge pocket defined by a generally U-shaped rail open to the trailing edge of the slider, and at least one leading edge pocket defined by a generally U-shaped rail open to the leading edge of the slider. Also disclosed is a method for determining an optimal width for a leading-edge pocket of predetermined length and depth to provide a flat fly height profile in combination with a trailing edge pocket of predetermined dimensions. For a given trailing edge pocket configuration, width optimization is achieved by constructing a number of prototype sliders, each having a unique leading to trailing edge pocket width ratio; measuring the inner and outer diameter fly heights for each prototype to obtain ID and OD fly height profile curves; and determining a leading edge pocket width corresponding to the point of intersection of the curves.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 10, 1996
    Assignee: International Business Machines Corporation
    Inventors: Lee K. Dorius, Laurence S. Samuelson
  • Patent number: 5532890
    Abstract: Disclosed is a negative pressure air bearing slider having at least one trailing edge pocket defined by a generally U-shaped rail open to the trailing edge of the slider, and at least one leading edge pocket defined by a generally U-shaped rail open to the leading edge of the slider. Also disclosed is a method for determining an optimal width for a leading edge pocket of predetermined length and depth to provide a flat fly height profile in combination with a trailing edge pocket of predetermined dimensions. For a given trailing edge pocket configuration, width optimization is achieved by constructing a number of prototype sliders, each having a unique leading to trailing edge pocket width ratio; measuring the inner and outer diameter fly heights for each prototype to obtain ID and OD fly height profile curves; and determining a leading edge pocket width corresponding to the point of intersection of the curves.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 2, 1996
    Assignee: International Business Machines Corporation
    Inventors: Lee K. Dorius, Laurence S. Samuelson
  • Patent number: 5509554
    Abstract: A sacrificial structure masking method for disk drive slider assemblies. Pico size air bearing surfaces (ABS) for sliders are created by mounting parallel slider rows into a carrier. The ABS are then established by positioning a mask having a sacrificial structure within the slider area, over the carrier and/or along cut zones between individual sliders. Once the masks are positioned, the carrier is exposed to transfer the pattern to the slider rows. The mask is then removed and the exposed area is etched from the slider rows. After the etching process, the masked portion of the slider is raised slightly to form the air bearing surfaces. Where a rear sacrificial structure is positioned over the carrier, no remnant is left on the slider surface after the etching step. However, sacrificial structures positioned within the slider area must be removed by a subsequent process step. The slider rows are then cut to form individual sliders.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: April 23, 1996
    Assignee: International Business Machines Corporation
    Inventors: Laurence S. Samuelson, Robin L. Almes, Michael J. Murtagh
  • Patent number: 5490025
    Abstract: The present invention is an air bearing design and methodology for use in a magnetic disk drive or similar device wherein particles of debris may be present on the recording surface. A deflecting wall is formed proximate to the leading edge of the slider, wherein airflow generated by the rotating disk enters the air bearing surface. The wall is disposed between the leading edge and one or more recessed regions defined by the ABS rail configuration. These recessed regions are ones that would otherwise be open to the incoming airflow and particles of debris. In a preferred embodiment, the wall is formed directly adjacent to the leading edge as an extension of rail portions located at the leading edge. The rail portions may include compression features. This design is suitable for both positive and negative pressure sliders. In an alternate embodiment, the deflecting wall stands alone and extends across substantially the slider's entire width.
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: February 6, 1996
    Assignee: International Business Machines Corporation
    Inventors: Lee K. Dorius, Laurence S. Samuelson
  • Patent number: 5490026
    Abstract: Disclosed is a negative pressure air bearing slider having at least one trailing edge pocket defined by a generally U-shaped rail open to the trailing edge of the slider, and at least one leading edge pocket defined by a generally U-shaped rail open to the leading edge of the slider. Also disclosed is a method for determining an optimal width for a leading edge pocket of predetermined length and depth to provide a flat fly height profile in combination with a trailing edge pocket of predetermined dimensions. For a given trailing edge pocket configuration, width optimization is achieved by constructing a number of prototype sliders, each having a unique leading to trailing edge pocket width ratio; measuring the inner and outer diameter fly heights for each prototype to obtain ID and OD fly height profile curves; and determining a leading edge pocket width corresponding to the point of intersection of the curves.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 6, 1996
    Assignee: International Business Machines Corporation
    Inventors: Lee K. Dorius, Laurence S. Samuelson
  • Patent number: 5438467
    Abstract: A negative-pressure air bearing slider structure includes a slider surface disposed adjacent to a data storage medium, and a leading edge relative to the motion of the data storage medium. A U-shaped rail with a closed end facing the leading edge and an open end facing the trailing edge is formed on the slider surface. The closed end of the U-shaped rail extends laterally across less than the width of the slider surface. In a first set of embodiments, there is a single U-shaped rail centered between two side rails. In a second set of embodiments, there are two U-shaped rails, each disposed along a respective side of the slider surface.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: August 1, 1995
    Assignee: International Business Machines Corporation
    Inventors: Lee K. Dorius, John M. Harker, Laurence S. Samuelson