Patents by Inventor Lee K. Dorius
Lee K. 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: 11942124Abstract: A slider may include a first side-edge surface, a second side-edge surface, and an air-bearing surface (ABS) comprising: a first side cavity adjacent to the first side-edge surface, and a first island side blocker situated at a mouth of the first side cavity, wherein: a first outer surface of the first island side blocker forms a portion of the first side-edge surface, a second outer surface of the first island side blocker is recessed from the first side-edge surface, a first side opening is situated on a leading side of the first island side blocker, and a second side opening is situated on a trailing side of the first island side blocker.Type: GrantFiled: July 11, 2023Date of Patent: March 26, 2024Assignee: Western Digital Technologies, Inc.Inventors: Yong Hu, Lee K. Dorius, Hung V. Nguyen, Taichi Nakamura
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Patent number: 8174794Abstract: A slider resistant to lubricant accumulation. The slider resistant to lubricant accumulation includes a positive-air-pressure portion of the slider configured to levitate the slider above a magnetic-recording disk and a negative-air-pressure portion of the slider configured to bring the slider into proximity with the magnetic-recording disk at a fly height sufficient for writing data to and reading data from the magnetic-recording disk. The slider resistant to lubricant accumulation also includes a lubricant-accumulation barrier disposed in proximity to a trailing edge of the slider. The lubricant-accumulation barrier is configured to reduce lubricant accumulation on the slider. The lubricant-accumulation barrier also includes a plurality of lubricant-accumulation-barrier portions disposed at a plurality of respective depths below an outer-most surface of a disk-facing side of the slider.Type: GrantFiled: November 26, 2008Date of Patent: May 8, 2012Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventor: Lee K. Dorius
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Patent number: 8169744Abstract: A slider resistant to lubricant accumulation. The slider resistant to lubricant accumulation includes a positive-air-pressure portion of the slider configured to levitate the slider above a magnetic-recording disk and a negative-air-pressure portion of the slider configured to bring the slider into proximity with the magnetic-recording disk at a fly height sufficient for writing data to and reading data from the magnetic-recording disk. The slider resistant to lubricant accumulation also includes a lubricant-accumulation barrier disposed in proximity to a trailing edge of the slider. The lubricant-accumulation barrier is configured to reduce lubricant accumulation on the slider.Type: GrantFiled: November 26, 2008Date of Patent: May 1, 2012Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventor: Lee K. Dorius
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Patent number: 8009389Abstract: An air bearing surface of a slider, which achieves low crown sensitivity is described. In one embodiment, the air bearing surface comprises a center channel and a plurality of side channels, wherein at least one side channel of the plurality of side channels is open to the center channel. The center channel and the plurality of side channels are configured to allow air to flow along the center channel toward the trailing edge of the ABS, such that there is low crown sensitivity.Type: GrantFiled: July 28, 2006Date of Patent: August 30, 2011Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventors: Sanford A. Bolasna, Lee K. Dorius, Weidong Huang, Robert N. Payne
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Patent number: 7898769Abstract: An air-bearing surface of a hard disk drive slider comprises a trailing edge wherein a magnetic transducer is coupled to the air-bearing surface. A leading edge is opposite from the trailing edge. A channel is coupled to the air-bearing surface wherein the channel comprises: a closure at a distal end proximal to the leading edge; a bottom surface; and a center of the channel approximately aligned colinear with a center of the magnetic transducer. In this configuration the channel generates significantly more negative pressure proximal to the leading edge thereby stiffening the air bearing during operation.Type: GrantFiled: February 15, 2007Date of Patent: March 1, 2011Assignee: Hitachi Global Storage Technologies, Netherlands, B.V.Inventors: Sanford Bolasna, Lee K. Dorius, Weidong Huang
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Patent number: 7751147Abstract: An air bearing surface (ABS) for a head assembly for a data storage device is described. The ABS includes a member, comprising a first extended region and a second extended region, wherein these two regions define a channel. This channel is open to the leading edge (LE) of the ABS, and is configured so as to allow air to flow along the channel toward the trailing edge (TE) of the ABS. As a result, the pressure of the air flowing along the channel does not experience significant fluctuations in pressure until approaching the trailing edge.Type: GrantFiled: January 10, 2006Date of Patent: July 6, 2010Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Lee K. Dorius, Weidong Huang
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Publication number: 20100128395Abstract: A slider resistant to lubricant accumulation. The slider resistant to lubricant accumulation includes a positive-air-pressure portion of the slider configured to levitate the slider above a magnetic-recording disk and a negative-air-pressure portion of the slider configured to bring the slider into proximity with the magnetic-recording disk at a fly height sufficient for writing data to and reading data from the magnetic-recording disk. The slider resistant to lubricant accumulation also includes a lubricant-accumulation barrier disposed in proximity to a trailing edge of the slider. The lubricant-accumulation barrier is configured to reduce lubricant accumulation on the slider.Type: ApplicationFiled: November 26, 2008Publication date: May 27, 2010Inventor: Lee K. DORIUS
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Publication number: 20100128393Abstract: A slider resistant to lubricant accumulation. The slider resistant to lubricant accumulation includes a positive-air-pressure portion of the slider configured to levitate the slider above a magnetic-recording disk and a negative-air-pressure portion of the slider configured to bring the slider into proximity with the magnetic-recording disk at a fly height sufficient for writing data to and reading data from the magnetic-recording disk. The slider resistant to lubricant accumulation also includes a lubricant-accumulation barrier disposed in proximity to a trailing edge of the slider. The lubricant-accumulation barrier is configured to reduce lubricant accumulation on the slider. The lubricant-accumulation barrier also includes a plurality of lubricant-accumulation-barrier portions disposed at a plurality of respective depths below an outer-most surface of a disk-facing side of the slider.Type: ApplicationFiled: November 26, 2008Publication date: May 27, 2010Inventor: Lee K. DORIUS
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Patent number: 7583473Abstract: An air bearing surface of a slider is described. In one embodiment, the air bearing surface comprises a center channel. The air bearing surface further comprises a plurality of side channels, wherein at least one side channel of the plurality of side channels is open to the center channel, and a plurality of pocket areas. The center channel, the plurality of side channels, and the plurality of pocket areas are configured to allow air to flow along the center channel toward the trailing edge of the ABS, such that a change in ambient pressure and a change and relative velocity of a head assembly with respect to a data storage medium of a data storage device would not significantly affect the fly height of a head assembly utilizing the ABS.Type: GrantFiled: July 28, 2006Date of Patent: September 1, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Sanford A. Bolasna, Lee K. Dorius, Weidong Huang, Robert N. Payne
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Publication number: 20080198509Abstract: An air-bearing surface of a hard disk drive slider comprises a trailing edge wherein a magnetic transducer is coupled to the air-bearing surface. A leading edge is opposite from the trailing edge. A channel is coupled to the air-bearing surface wherein the channel comprises: a closure at a distal end proximal to the leading edge; a bottom surface; and a center of the channel approximately aligned colinear with a center of the magnetic transducer. In this configuration the channel generates significantly more negative pressure proximal to the leading edge thereby stiffening the air bearing during operation.Type: ApplicationFiled: February 15, 2007Publication date: August 21, 2008Inventors: Sanford Bolasna, Lee K. Dorius, Weidong Huang
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Publication number: 20080158724Abstract: A head slider for a magnetic disk drive is provided. The head slider includes a leading edge, a trailing edge, an inner diameter side and an outer diameter side of an air bearing surface. The head slider further includes a first recess on the air bearing surface of the head slider, a second recess on the air bearing surface of the head slider wherein the second recess is deeper than the first recess and a third recess on the air bearing surface of the head slider wherein the third recess is deeper than the second recess and is disposed within the second recess, forming a first pocket.Type: ApplicationFiled: December 28, 2006Publication date: July 3, 2008Inventors: Lee K. Dorius, Hidekazu Kohira, Jianhua Li, Satoru Ookubo
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Publication number: 20080024921Abstract: An air bearing surface of a slider, which achieves low crown sensitivity is described. In one embodiment, the air bearing surface comprises a center channel and a plurality of side channels, wherein at least one side channel of the plurality of side channels is open to the center channel. The center channel and the plurality of side channels are configured to allow air to flow along the center channel toward the trailing edge of the ABS, such that there is low crown sensitivity.Type: ApplicationFiled: July 28, 2006Publication date: January 31, 2008Inventors: Sanford A. Bolasna, Lee K. Dorius, Weidong Huang, Robert N. Payne
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Publication number: 20080024924Abstract: An air bearing surface of a slider is described. In one embodiment, the air bearing surface comprises a center channel. The air bearing surface further comprises a plurality of side channels, wherein at least one side channel of the plurality of side channels is open to the center channel, and a plurality of pocket areas. The center channel, the plurality of side channels, and the plurality of pocket areas are configured to allow air to flow along the center channel toward the trailing edge of the ABS, such that a change in ambient pressure and a change and relative velocity of a head assembly with respect to a data storage medium of a data storage device would not significantly affect the fly height of a head assembly utilizing the ABS.Type: ApplicationFiled: July 28, 2006Publication date: January 31, 2008Inventors: Sanford A. Bolasna, Lee K. Dorius, Weidong Huang, Robert N. Payne
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Patent number: 7029590Abstract: The present invention provides a non-actuatable, self-limiting wear contact pad slider and method for making the same. A protruding element surrounding the transducer is fabricated using a third etch step so that the protruding element has a height that is greater than or equal to the designed fly height of the aerodynamic lift surface minus the disk roughness.Type: GrantFiled: June 20, 2003Date of Patent: April 18, 2006Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Pantelis S. Alexopoulos, Lee K. Dorius, Francis Chee-Shuen Lee, Timothy C. O'Sullivan, Gurinder Singh
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Patent number: 6714382Abstract: The present invention provides a non-actuatable, self-limiting wear contact pad slider and method for making the same. A protruding element surrounding the transducer is fabricated using a third etch step so that the protruding element has a height that is greater than or equal to the designed fly height of the aerodynamic lift surface minus the disk roughness.Type: GrantFiled: October 13, 2000Date of Patent: March 30, 2004Assignee: Hitachi Global Storage TechnologiesInventors: Pantelis S. Alexopoulos, Lee K. Dorius, Francis Chee-Shuen Lee, Timothy C. O'Sullivan, Gurinder Singh
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Publication number: 20040016107Abstract: The present invention provides a non-actuatable, self-limiting wear contact pad slider and method for making the same. A protruding element surrounding the transducer is fabricated using a third etch step so that the protruding element has a height that is greater than or equal to the designed fly height of the aerodynamic lift surface minus the disk roughness.Type: ApplicationFiled: June 21, 2003Publication date: January 29, 2004Applicant: International Business Machines CorporationInventors: Pantelis S. Alexopoulos, Lee K. Dorius, Francis Chee-Shuen Lee, Timothy C. O'Sullivan, Gurinder Singh
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Patent number: 6493185Abstract: The present invention provides an optimized pad design for a slider that minimizes the effect of mask alignment tolerances to allow for a more consistent N58 pad area and hence a more controllable burnish rate of the protruding pad. The protruding pad includes a first portion and a second portion formed by processing material to form the first and second portion wherein at least a quantity of the first portion comprises a first material type and the second portion comprises a second material type, the protruding pad further comprising a boundary interface separating the first material type from the second material type, the boundary interface having a position on the first portion that is dependent upon an alignment tolerance for the processing and that defines a surface area for the material of the second type, wherein the surface area of the material of the second type is negligibly affected by the position of the boundary interface.Type: GrantFiled: October 13, 2000Date of Patent: December 10, 2002Assignee: International Business Machines CorporationInventors: Lee K. Dorius, Ullal Vasant Nayak, Robert Nolan Payne
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Patent number: 6424493Abstract: A magnetic head has a left side rail formed on a disk facing surface in a protruded manner, and a right side rail formed on the disk facing surface in a protruded manner. A cross rail formed on the disk facing surface protrudes and is elongated continuously to both the left side rail and the right side rail. A left air bearing surface is formed on the disk facing surface in a protruded manner, and formed only on a side of a leading edge continuously from the left side rail. The left air bearing surface has a continuous portion to the left side rail, and a right air bearing surface which is formed on the disk facing surface in a protruded manner, formed only on a side of the leading edge continuously from the right side rail.Type: GrantFiled: June 29, 2000Date of Patent: July 23, 2002Assignee: International Business Machines CorporationInventors: Tsuyoshi Matsumoto, Takashi Nakamura, Atsushi Tobari, Tatsushi Aoki, Lee K. Dorius
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Patent number: 6069769Abstract: A slider having an air bearing configuration designed to minimize damage to the disk surface. The air bearing slider includes an air bearing surface and at least one non-air bearing surface. For example, the non-air bearing surface may include a first etch surface and/or a second etch surface. The non-air bearing surface has at least one rounded corner. The non-air bearing surface may also have at least one rounded edge.Type: GrantFiled: September 30, 1997Date of Patent: May 30, 2000Assignee: International Business Machines CorporationInventors: Lee K. Dorius, Donald R. Gillis, Mike Suk
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Patent number: 5872686Abstract: A magnetic storage system having an air bearing slider designed to minimize disk damage. The magnetic storage system may include a load/unload structure for loading or unloading the slider when the spindle motor is powered down. The air bearing slider includes an air bearing surface and at least one non-air bearing surface. For example, the non-air bearing surface may include a first etch surface and/or a second etch surface. The non-air bearing surface has at least one rounded corner. The non-air bearing surface may also have at least one rounded edge.Type: GrantFiled: September 30, 1997Date of Patent: February 16, 1999Assignee: International Business Machines CorporationInventors: Lee K. Dorius, Donald R. Gillis, Mike Suk