Rail Side Edge Detail Patents (Class 360/235.9)
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Patent number: 9082441Abstract: Embodiments disclosed herein generally relate to a head slider within disk drive data storage devices. A head slider comprises a head body having a leading edge, a trailing edge and an ABS. The ABS has a leading portion and a trailing portion, the trailing portion having a tail section disposed adjacent the trailing edge. The head body has three surfaces recessed from the ABS: a first surface disposed a first vertical distance, a second surface disposed a second vertical distance that is greater than the first vertical distance, and a third surface disposed a third vertical distance that is greater than the second vertical distance. A first plateau disposed at the third surface is bound between a second plateau at the first surface and a trailing pad of the tail section. Between the first plateau and the trailing pad are one or more notches disposed at the first surface.Type: GrantFiled: June 2, 2014Date of Patent: July 14, 2015Assignee: HGST NETHERLANDS B.V.Inventors: Yong Hu, Weidong Huang
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Patent number: 8553363Abstract: Approaches for a head slider for use within a hard-disk drive. The head slider comprises an air bearing surface (ABS) and an electromagnetic transducer disposed at an air outflow end of the air bearing surface. The air bearing surface comprises an inner (ID) side rail proximate the inner diameter side and an outer (OD) side rail proximate the outer diameter side. The ID side rail is longer in length than the OD side rail. The physical dimensions of the ID side rail have a geometry that reduces a contact force between the head and the magnetic-recording disk when the head experiences a positive roll static attitude (RSA). The physical dimensions of the OD side rail have a geometry that reduces contact force between the head and the magnetic-recording disk when the head experiences a negative RSA.Type: GrantFiled: April 5, 2011Date of Patent: October 8, 2013Assignee: HGST Netherlands B.V.Inventor: Lee Dorius
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Patent number: 8248729Abstract: Embodiments of the present invention pertain to reducing the probability of a slider contacting a surface of a disk. According to one embodiment, a first etch is performed on the slider. Air compression mechanisms are created near each corner associated with a trailing edge of the slider so that the probability that the corners will contact the surface of the disk is reduced.Type: GrantFiled: November 16, 2006Date of Patent: August 21, 2012Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventors: Weidong Huang, Robert N. Payne, Qinghua Zeng
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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: 8137163Abstract: A disc burnishing head includes an array of burnishing pads and a first and second side rail projecting from a bottom surface of a slider body. The side rails each have an inside surface facing the burnishing pads and an outside surface facing outward. The outside surface of at least the first side rail is serrated. The serrations define a plurality of teeth and notches on the outside surface of the first side rail for cutting, cleaning, and conditioning defects from the surface of a disc.Type: GrantFiled: March 16, 2009Date of Patent: March 20, 2012Assignee: Seagate Technology LLCInventors: Weimin Qian, Igor V. Sytine, Matthew Aaron Carper, Pranesh Swany, Eric K. Dahlin, Hamid F. Ghazvini
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Patent number: 8051553Abstract: Apparatus for adjusting the static attitude of a head suspension having a gimbal with at least one gimbal arm. One embodiment of the invention includes a pair of first contacting members contacting a first side of the gimbal arm at a pair of spaced apart locations, and a second contacting member contacting a second side of the gimbal arm at an intermediate location between the spaced apart locations. The first and second contacting members move together relative to each other, plastically deforming the gimbal arm by the relative movement between the second and first contacting members while the spaced apart location between the first contacting members is maintained during the plastic deformation such that at least one of a pitch and roll parameter of the gimbal is adjusted to a desired amount.Type: GrantFiled: December 14, 2007Date of Patent: November 8, 2011Assignee: Hutchinson Technology IncorporatedInventors: Thomas H. Wick, Mark S. Hedeen, Jeremy J. Stroschein, John L. Schumann, Justin M. Eggert
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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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Publication number: 20090109574Abstract: A slider includes a slider body having an outer side edge, an inner side edge, an outside rail and an inside rail. The outside rail has an inner edge and an outer edge and is positioned adjacent to the outer side edge of the slider body. The inside rail has an inner edge and an outer edge and is positioned adjacent to the inner side edge of the slider body. The outside rail includes an outer pressurization surface and the inside rail includes an inner pressurization surface. Both pressurization surfaces have an above-ambient fluid pressure when the slider is in flight. The outer pressurization surface extends along the outer edge of the outside rail a length greater than a length that the inner pressurization surface extends along the outer edge of the inside rail.Type: ApplicationFiled: October 26, 2007Publication date: April 30, 2009Applicant: Seagate Technology LLCInventor: Richard E. Martin
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Patent number: 7330338Abstract: Apparatus and method for adjusting at least one of a pitch and roll parameter of a gimbal for a head suspension assembly having a pair of members contacting at least one gimbal arm at spaced apart locations and having an additional member contacting the gimbal arm intermediate the spaced apart locations and wherein the members move together to cause plastic deformation of the gimbal arm. A like apparatus and method may be used sequentially or concurrently on a second gimbal arm, and may have an inverted orientation with respect to the first apparatus.Type: GrantFiled: May 5, 2004Date of Patent: February 12, 2008Assignee: Hutchinson Technology IncorporatedInventors: Thomas H. Wick, Mark S. Hedeen, Jeremy J. Stroschein, John L. Schumann, Justin M. Eggert
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Patent number: 7317596Abstract: A continuous-media or patterned-media disk drive with a low ratio of linear bit density in bits per inch (BPI) in the along-the-track direction to track density in tracks per inch (TPI) in the cross-track direction has a magnetoresistive read head with high cross-track spatial resolution. The read head is located between two magnetic shields, with the shields and read head formed on a side surface of the head carrier perpendicular to the carrier's disk-facing surface. The carrier is supported by the disk drive actuator with the side surface of the carrier oriented generally parallel to the data tracks. In this arrangement the high-spatial-resolution direction of the read head (the transverse direction perpendicular to the side surface on which the head is formed) is in the radial or cross-track direction.Type: GrantFiled: June 21, 2005Date of Patent: January 8, 2008Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Thomas R. Albrecht, Robert E. Fontana, Jr., Ching Hwa Tsang, Mason L. Williams, Bruce Alexander Wilson
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Patent number: 7085103Abstract: A magnetic head slider, for sliding on a magnetic disk, which has a leading edge, a trailing edge, an air bearing surface having a front step bearing of submicron depth made from the leading edge, and a rail surface made from the front step bearing. A negative pressure recess which is deeper than the front step bearing, is formed as a recess from the rail surf ace, and a side step bearing with a depth identical to that of the front step bearing is made from the rail surface. Side padB are provided which each have a width W and length L, wherein W is greater than L.Type: GrantFiled: December 14, 2004Date of Patent: August 1, 2006Assignee: Hitachi Global Storage Technologies Japan, Ltd.Inventors: Hidekazu Kohira, Masaaki Matsumoto, Kiyoshi Hashimoto, Masayoshi Endo, Akio Takakura, Yoshinori Takeuchi, Shinsuke Higuchi, Akira Iida
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Patent number: 6920019Abstract: A disk drive (10) including one or more storage disks (12) and a head stack assembly (14) is provided herein. The head stack assembly (14) includes an actuator assembly (16) and a plurality of transducer assemblies (18). The actuator assembly (16) moves the transducer assemblies (18) relative to the storage disks (12). Each transducer assembly (18) includes a slider (22), a load beam (24) and a head suspension (26) that secures the slider (22) the load beam (24). Preferably, the slider (22) includes an air bearing surface (27) and one or more pads (28). Importantly, the head suspension (26) maintains the slider (22) at a negative pitch static attitude. As a result thereof, the slider (22) is less likely to tip during shutdown and/or after vibration.Type: GrantFiled: January 23, 2001Date of Patent: July 19, 2005Assignee: Maxtor CorporationInventors: Richard E. Martin, Brian D. Strom
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Patent number: 6754043Abstract: The head slider mounts a recording/reproducing element and flies over a recording medium with the airflow generated when the recording medium moves. The head slider comprises a slider body having an air inflow end and an air outflow end, a rail projected from the slider body to define an air bearing surface extended to the outflow end, a projection formed on the rail and between the inflow end and the outflow end, and a recess formed at the outflow end of the rail to make narrow the width of the rail. When the recording medium stops, the head slider and the recording medium are in contact at the projection and the air outflow end of the rail. Since the outflow end of the rail is narrow in width, the stiction can be prevented. Moreover, it is unnecessary to form a projection near the outflow end of the rail and thereby the flying height of the recording/reproducing element can be lowered to improve the recording/reproducing sensitivity.Type: GrantFiled: August 23, 1999Date of Patent: June 22, 2004Assignee: Fujitsu LimitedInventors: Yoshiharu Kasamatsu, Ryosuke Koishi, Takayuki Yamamoto
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Patent number: 6687088Abstract: A slider body configuration, or slider, for carrying a data transducer in cooperative relationship with a rotating data storage disc. The slider includes a plurality of landing pads which serve to minimize the contact area between the slider and the discs when the heads are parked in contact with the discs, and the landing pads project from surfaces which are farther removed from the disc surface than the air bearing surfaces, thus minimizing the size and strength of any liquid miniscus formed between the slider and the disc when the slider and disc are in contact. By recessing the bases of the landing pads from the air bearing surfaces, the effect of the landing pads on the separation between the data transducer and the discs is minimized.Type: GrantFiled: June 19, 1998Date of Patent: February 3, 2004Assignee: Seagate Technology LLCInventors: Zine-Eddine Boutaghou, Peter Raymond Segar
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Patent number: 6490134Abstract: An information handling system, such as a disk drive, includes a base, a disk stack rotatably attached to the base, and an actuator assembly movably attached to the base. The actuator assembly also includes a load spring and a slider attached to said load spring. The slider includes an air-bearing surface which has roughened contact surface areas to reduce stiction in a contact start stop drive or in a drive that parks the slider on a ramp.Type: GrantFiled: January 11, 2001Date of Patent: December 3, 2002Assignee: Seagate Technology LLCInventor: Zine Eddine Boutaghou
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Patent number: 6483668Abstract: A slider for supporting transducer elements in a disc drive. The slider including an edge protection feature for contact interface protection for head disc interface.Type: GrantFiled: December 13, 1999Date of Patent: November 19, 2002Assignee: Seagate Technology LLCInventors: Mary C. Hipwell, Andreas A. Polycarpou, Zine-Eddine Boutaghou
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Patent number: 6405426Abstract: A first step portion is formed at a portion at which on an outer end portion of a facing surface of a surface of the slider meets the side panel of the slider. Furthermore, a second step portion is formed at the portion at which the outer end portion of the first step portion meets the side panel of the slider. An edge or the like due to machining occurs at an outer end portion of the second step portion. However, even if the magnetic head is steeply inclined, the outer end portion of the second step portion in which the edge or the like due to machining occurs is barely brought into contact with the recording medium because of the formation of the second step portion.Type: GrantFiled: June 9, 2000Date of Patent: June 18, 2002Assignee: Alps Electric Co., Ltd.Inventor: Yasuyuki Kondo
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Patent number: 6198601Abstract: A magnetic head element has one or more rails formed on the surface thereof. Each rail is formed so as to have a tapered angle of 55-85°. To form such a rail, ion milling is conducted; the rail substrate used is allowed to have an inclination angle to 15-60° and is rotated; and there is used, as the ion milling gas, a fluorinated hydrocarbon (e.g., CH2FCF3) gas alone or a mixed gas of said fluorinated hydrocarbon gas and Ar, SF6 or the like. Accordingly, a magnetic head rail shape gives a small variation in flying height between magnetic bead and magnetic disc.Type: GrantFiled: March 16, 1999Date of Patent: March 6, 2001Assignee: Hitachi, Ltd.Inventors: Yasuo Hira, Tamaki Toba, Hirotaka Imayama, Atsuko Ohkawa, Masayasu Fujisawa, Kazuo Nate, Hideki Sonobe, Saburo Suzuki, Eisei Togawa, Hiroshi Ishizaki, Yoshiki Hagiwara