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Hiroyuki Kubotera

Hiroyuki Kubotera, Yamato-Shi JP

Patent application numberDescriptionPublished
20100142093STORAGE DEVICE AND METHOD OF CALCULATING TRANSFER AMOUNT OF LUBRICANT - According to one embodiment, a storage device includes a storage medium and a head slider. The storage medium includes a surface coated with a lubricant. The head slider includes a medium facing surface that faces a surface of the storage medium based on the relative movement to the storage medium. The product ph [atm·nm] of air pressure p [atm] defined between the surface of the storage medium and the medium facing surface and a floating amount h [nm] of the medium facing surface defined from the surface of the storage medium satisfies06-10-2010
20100149692HEAD SLIDER AND STORAGE DEVICE - According to one embodiment, a head slider includes a slider main body, a front rail, and at least a pair of grooves. The slider main body defines a base surface. The front rail rises from the base surface on the air inflow side of the slider main body and defines an air bearing surface on the top surface. The grooves are each formed in the front rail and define the air outflow end closer to the air inflow side than the air outflow end of the air bearing surface. The grooves are spaced apart in the slider width direction of the slider main body.06-17-2010

Hiroyuki Kubotera, Kawasaki JP

Patent application numberDescriptionPublished
20080259500Head slider for disk apparatus - A head slider, of a disk apparatus, flying over a rotary magnetic recording disk, having a characteristic less dependent on the atmospheric pressure. The head slider of a disk apparatus comprises: a magnetic element adapted to fly over a magnetic recording medium; a medium opposing surface being formed with, with respect to the direction in which the medium moves, an inflow pad portion at the upstream end and a pair of side rail portions extending downstream from the inflow pad portion, and a center pad at the central part and a pair of side pads on the sides of the center pad and upstream of the center pad at the downstream end of the head slider. The center pad and the side pads are constituted so that a positive pressure generated by the side pads is greater than a positive pressure generated by the center pad.10-23-2008
20090059432HEAD SLIDER OF MAGNETIC DISK DEVICE - Lubricant on a rotating recording medium can attach to a slider, particularly on the pad formed in the proximity of the trailing edge. In the slider of this invention, lubricant is not accumulated in the vicinity of the trailing edge and can be drawn to the trailing edge and dispersed constantly. The head slider includes a center pad formed on an air bearing surface in the vicinity of the center of a trailing edge of the slider. A trailing pad is formed so as to bridge a trailing edge of the center pad and the trailing edge of the slider. The trailing pad is formed lower than a highest surface of the center pad and higher than a lowest surface of the slider.03-05-2009
20090244781MAGNETIC HEAD SLIDER AND MAGNETIC DISK DRIVE - A magnetic head slider includes a magnetic head element for reading or writing data from or into a magnetic recording medium. The magnetic head slider flies over the magnetic recording medium by an air flow generated by rotation of the magnetic recording medium. The magnetic head slider includes a slider substrate including a center pad for supporting the magnetic head element, the center pad having a sliding surface opposing the magnetic recording medium and a side surface at a downstream side of the air flow, the slider substrate including a concave portion having a bottom surface recessed from the sliding surface; and an insulating layer covering the side surface of the slider substrate, the insulating layer having an edge surface adjacent to the bottom surface of the concave portion, the edge surface having substantially the same plane with the bottom surface of the concave portion.10-01-2009
20100002339HEAD SLIDER, MAGNETIC STORAGE APPARATUS AND METHOD OF FABRICATING HEAD SLIDER - A head slider includes a medium opposing surface configured to oppose a recording surface of a magnetic recording medium, a head element provided on the medium opposing surface, and an outlet end surface provided on a downstream side of the head element in a direction in which the magnetic recording medium moves relative to the head element, and extending substantially in a perpendicular direction from the medium opposing surface. The outlet end surface has a surface free energy greater than a surface free energy of the medium opposing surface.01-07-2010
20100020444HEAD SLIDER IN MAGNETIC DISK DRIVE - A head slider in a magnetic disk drive wherein provisions are made to facilitate the evaporation of lubricant adhering to the slider and thereby substantially reduce the chance of the fly height of the slider becoming unstable due to a lubricant drop. A head element, a heat generating element, and a multilayered heat conducting structure formed from multiple layers stacked along a longitudinal direction of the slider, with at least one layer extending up to portions near both lateral sides of the slider, are embedded into a nonmagnetic insulating layer formed in an air exit end portion of the slider. The heat generated by the heat generating element is efficiently conducted throughout the nonmagnetic insulating layer to heat the entire structure of the nonmagnetic insulating layer. As a result, the lubricant adhering to any portion of the nonmagnetic insulating layer is efficiently heated, causing the lubricant to evaporate or flow.01-28-2010
20100103560HEAD SLIDER - According to one embodiment, a head slider includes a slider main body, an element embedded film, a head element, and a plurality of recesses. The head element is embedded in the element embedded film. The recesses are distributed in a predetermined area formed on the trailing end surface of the element embedded film.04-29-2010

Patent applications by Hiroyuki Kubotera, Kawasaki JP