Patent application number | Description | Published |
20080198509 | Three-etch ABS design with a closed front channel - 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. | 08-21-2008 |
20080204936 | Slider air bearing with asymetric side rail - 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, the first recess defining a first rail proximate the inner diameter side and a second rail proximate the outer diameter side wherein the first rail and the second rail are higher with respect to the recess and are asymmetrical with respect to each other. | 08-28-2008 |
20100091405 | SLIDER WITH AN AIR BEARING SURFACE AND RELATED TOPOGRAPHY - A slider for use with disk drive data storage devices includes a topography that defines features of the slider. The features facilitate in controlling fly-height and/or inhibiting lubricant accumulation on the slider. For example, a trailing air bearing surface of the slider may be formed around a multi-stepped channel that adjusts the fly-height. Further, a shallow shelf behind an air bearing surface and/or curved edges of the features to alter stagnation may contribute to at least inhibiting lubricant collection on the slider. | 04-15-2010 |
20100091406 | SLIDER WITH POCKETS IN FRONT OF AIR BEARING SURFACE - A slider for use with disk drive data storage devices includes a topography that defines features of the slider. The features facilitate in controlling peak pressure, providing stiffness, and/or inhibiting lubricant accumulation on the slider. For example, the features include an air bearing surface and a cavity disposed in front of the air bearing surface. The cavity is closed on all sides by sidewalls. | 04-15-2010 |
20100226035 | ABS WITH LUBRICANT CONTROL TRENCHES FOR HARD DISK DRIVES - A method and apparatus for controlling lubrication in hard disk drives. Hard disk drives often include lubrication on the disks to protect the disks from incidental contact with the head slider. Embodiments of the invention include lubrication control recesses on the air bearing surface (ABS) of the head slider. The recesses reduce air stagnation on the ABS and/or store excess lubrication that migrates from the disk to the head slider. By reducing build-up of lubrication and storing excess lubrication, the lubrication control recesses avoid failure that may occur as a result of the lubrication interfering with the ABS or the read/write elements of the head. | 09-09-2010 |
20110026164 | AIR BEARING SURFACE OF A HEAD SLIDER IN A HARD DISK DRIVE - A head slider for supporting a head over a magnetic disk in a hard disk drive, and a method of making the head slider are disclosed. The air bearing surface (ABS) of the head slider includes a relatively deep recess in front of a trailing pad and an island pad. A recess is formed between the trailing pad and the island pad of the ABS. In operation, the recess may reduce the peak pressure of the ABS, resulting in a reduced mid disk (MD) hump without a reduction in other performance parameters. The reduction in peak pressure may also reduce lubrication pick-up from the magnetic disk. | 02-03-2011 |
20110199704 | ABS WITH A LUBRICATION CONTROL DAM FOR HARD DISK DRIVES - A method and apparatus for controlling lubrication in hard disk drives. Hard disk drives often include lubrication on the disks to protect the disks from incidental contact with the head slider. Embodiments of the invention include lubrication control surfaces or dams on the air bearing surface (ABS) of the head slider. The dams redirect air flow on the ABS and/or redirects excess lubrication that migrates from the disk to the head slider. By redirecting excess lubrication, the lubrication control dams remove and/or store the lubrication and avoid failure that may occur as a result of the lubrication interfering with the ABS or the read/write elements of the head. | 08-18-2011 |
Patent application number | Description | Published |
20080302296 | Method and Apparatus for Growing a Ribbon Crystal with Localized Cooling - A method of growing ribbon crystal provides a crucible containing molten material, and passes at least two strings through the molten material to produce a partially formed ribbon crystal. The method then directs a fluid to a given portion of the partially formed ribbon crystal to convectively cool the given portion. | 12-11-2008 |
20080308034 | Ribbon Crystal Pulling Furnace Afterheater with at Least One Opening - A ribbon crystal pulling furnace has an interior for enclosing at least a portion of one or more ribbon crystals, and an afterheater positioned within the interior. The afterheater has at least one wall with one or more openings that facilitate control of the temperature profile within the furnace. | 12-18-2008 |
20080308035 | Removable Thermal Control for Ribbon Crystal Pulling Furnaces - A ribbon crystal pulling furnace has a base insulation and a liner insulation removably connected to the base insulation. At least a portion of the liner insulation forms an interior for containing a crucible. | 12-18-2008 |
20090060823 | Reduced Wetting String for Ribbon Crystal - A string for use in a string ribbon crystal has a base portion with a refractory material, and an externally exposed layer radially outward of the refractory material. The base portion has a coefficient of thermal expansion that is generally matched with the coefficient of thermal expansion for silicon. The externally exposed layer has a contact angle with silicon of between about 15 and 120 degrees. | 03-05-2009 |
20090301386 | Controlling Transport of Gas Borne Contaminants Across a Ribbon Surface - A method of growing a ribbon crystal provides a crucible containing molten material and passes string through the molten material to grow the ribbon crystal. The method further directs gas flow around the ribbon crystal such that the gas flows down along the ribbon crystal toward the crucible. | 12-10-2009 |
20100092776 | Ribbon Crystal Having Reduced Wetting String - A string for use in a string ribbon crystal has a base portion with a refractory material, and an externally exposed layer radially outward of the refractory material. The base portion has a coefficient of thermal expansion that is generally matched with the coefficient of thermal expansion for silicon. The externally exposed layer has a contact angle with silicon of between about 15 and 120 degrees. | 04-15-2010 |
Patent application number | Description | Published |
20110155045 | Controlling the Temperature Profile in a Sheet Wafer - A sheet wafer growth system includes a crucible for containing molten material and an afterheater positioned above the crucible. The afterheater has an inner surface disposed toward the crucible. The system further includes one or more shields adjacent to the inner surface of the afterheater. The afterheater and the shield(s) are configured to allow a sheet wafer to pass adjacent to the shield(s). Each shield has two or more substantially different thermally conductive regions such that the two or more regions are configured to control the temperature profile of the growing sheet wafer. | 06-30-2011 |
20110247546 | Ribbon Crystal String for Increasing Wafer Yield - A ribbon crystal has a body with a width dimension, and string embedded within the body. The string has a generally elongated cross-sectional shape. This cross-section (of the string) has a generally longitudinal axis that diverges with the width dimension of the ribbon crystal body. | 10-13-2011 |
20120125254 | Method for Reducing the Range in Resistivities of Semiconductor Crystalline Sheets Grown in a Multi-Lane Furnace - A method for reducing the range in resistivities of semiconductor crystalline sheets produced in a multi-lane growth furnace. A furnace for growing crystalline sheets is provided that includes a crucible with a material introduction region and a crystal growth region including a plurality of crystal sheet growth lanes. The crucible is configured to produce a generally one directional flow of material from the material introduction region toward the crystal sheet growth lane farthest from the material introduction region. Silicon doped with both a p-type dopant and an n-type dopant in greater than trace amounts is introduced into the material introduction region. The doped silicon forms a molten substance in the crucible called a melt. Crystalline sheets are formed from the melt at each growth lane in the crystal growth region. Co-doping the silicon feedstock can reduce the variation in resistivities among the crystalline sheets formed in each lane. | 05-24-2012 |
20120164379 | Wide Sheet Wafer - A sheet wafer has a generally flat, generally rectangular shaped body with a length and a width, and first and second filaments generally perpendicular to the width of the body. The first and second filaments are at least partially encapsulated by a wafer material and, together with the wafer material, form at least a portion of the body. The width is between about 145 mm and 165 mm. | 06-28-2012 |
20120211917 | Wafer Furnace with Variable Flow Gas Jets - A method of forming a sheet wafer 1) passes at least two filaments through a molten material to produce a partially formed sheet wafer, 2) directs a cooling fluid at a flow rate toward the partially formed sheet wafer to convectively cool a given portion of the partially formed sheet wafer, and 3) monitors the thickness of the given portion of the partially formed sheet wafer. To ensure appropriate thicknesses of the wafer, the method controls the flow rate of the cooling fluid as a function of the thickness of the given portion of the partially formed sheet wafer. | 08-23-2012 |
20140083349 | REMOVABLE THERMAL CONTROL FOR RIBBON CRYSTAL PULLING FURNACES - A ribbon crystal pulling furnace has a base insulation and a liner insulation removably connected to the base insulation. At least a portion of the liner insulation forms an interior for containing a crucible. | 03-27-2014 |