Patents by Inventor Lee Kevin Dorius
Lee Kevin Dorius 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).
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Patent number: 7408741Abstract: A magnetic head slider suitable for a disk drive measuring 1.8 inches or less in disk size incorporates preventive measures against the decreases in lifting force that occur in small sliders with a slider width of 0.8 mm or less. The present invention improves the inclination margins of the flying slider in a rolling direction at the lowest flying point, and achieves low flying height and stable flying. The slider is constructed with stepped surfaces on the slider's leading-side flying surface formed up of shallow-grooved surfaces and a deep-grooved surface so that a trailing-side width W2 between the stepped surfaces is smaller than a leading-side width W1.Type: GrantFiled: July 29, 2005Date of Patent: August 5, 2008Assignee: Hitachi Global Storage Technologies Netherlands B. V.Inventors: Hiroshi Agari, Lee Kevin Dorius, Kiyoshi Hashimoto, Yoshinori Takeuchi
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Patent number: 6449126Abstract: 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: GrantFiled: February 27, 1997Date of Patent: September 10, 2002Assignee: International Business Machines CorporationInventors: Lee Kevin Dorius, John M. Harker, Laurence Scott Samuelson
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Patent number: 6421205Abstract: A slider used in a disk drive apparatus is described which has an air bearing surface and a trailing surface and a plurality of recessed steps at the trailing edge. These steps at the trailing edge greatly reduce stictional forces.Type: GrantFiled: February 23, 1999Date of Patent: July 16, 2002Assignee: International Business Machines CorporationInventors: Lee Kevin Dorius, Donald Ray Gillis, Owen Melroy, Vedantham Raman, Richard Lindsay Stover, Mike Suk
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Patent number: 6226859Abstract: A slider air bearing surface design which significantly reduces the fly height sensitivity to contamination in the crossbar area. A structural feature at the leading edge provides contamination protection to the air bearing surface. The slider includes a slider body having an air bearing surface formed on a lower surface, wherein the air bearing surface comprises a crossrail and a central rail extending from the crossrail toward a leading edge for diverting debris from the air bearing surface to prevent accumulation thereon. The leading central rail includes a flared edge connecting the central rail to the crossrail, wherein the flared edge expands the width of the central rail toward the crossrail. A trailing center rail extends from the crossbar toward the trailing edge, and is narrower than the leading central rail. Further, the trailing center rail may be skewed relative to the sides of the slider body.Type: GrantFiled: January 15, 1999Date of Patent: May 8, 2001Assignee: International Business Machines CorporationInventors: Lee Kevin Dorius, Paul R. Peck
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Patent number: 6055130Abstract: 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: GrantFiled: April 7, 1998Date of Patent: April 25, 2000Assignee: International Business Machines CorporationInventors: Lee Kevin Dorius, John M. Harker, Laurence Scott Samuelson
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Patent number: 6055128Abstract: An air bearing slider having reduced mask misalignment sensitivities. For one embodiment, the air bearing slider has three etch surfaces formed by a dual etch process. The leading and trailing step regions are formed by a first etching step. The lateral step regions, adjacent to the air bearing pads, are formed by a second etching step. The negative pressure region is formed by both the first and second etching steps.Type: GrantFiled: May 14, 1997Date of Patent: April 25, 2000Assignee: International Business Machines CorporationInventors: Lee Kevin Dorius, Sanford Anthony Bolasna
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Patent number: 6004472Abstract: A dual etch process for forming an air bearing slider design with three etch depths. For one embodiment the first etch forms the leading and trailing step regions and the second etch forms the lateral step regions. The combination of the first and second etches form the negative pressure region.Type: GrantFiled: May 14, 1997Date of Patent: December 21, 1999Assignee: International Business Machines CorporationInventors: Lee Kevin Dorius, Sanford Anthony Bolasna
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Patent number: 5926343Abstract: A slider air bearing surface design which significantly reduces the fly height sensitivity to contamination in the crossbar area. A structural feature at the leading edge provides contamination protection to the air bearing surface. The slider includes a slider body having an air bearing surface formed on a lower surface, wherein the air bearing surface comprises a crossrail and a central rail extending from the crossrail toward a leading edge for diverting debris from the air bearing surface to prevent accumulation thereon. The leading central rail includes a flared edge connecting the central rail to the crossrail, wherein the flared edge expands the width of the central rail toward the crossrail. A trailing center rail extends from the crossbar toward the trailing edge, and is narrower than the leading central rail. Further, the trailing center rail may be skewed relative to the sides of the slider body.Type: GrantFiled: December 2, 1996Date of Patent: July 20, 1999Assignee: International Business Machines CorporationInventors: Lee Kevin Dorius, Paul R. Peck
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Patent number: 5798889Abstract: 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: GrantFiled: May 1, 1995Date of Patent: August 25, 1998Assignee: International Business Machines CorporationInventors: Lee Kevin Dorius, John M. Harker, Laurence Scott Samuelson
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Patent number: 5650892Abstract: 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: GrantFiled: June 13, 1996Date of Patent: July 22, 1997Assignee: International Business MachinesInventors: Lee Kevin Dorius, Laurence Scott Samuelson