Patent application number | Description | Published |
20080225437 | Head gimbal assembly with low head disk interaction response - Methods and an apparatus for producing a head gimbal assembly with minimum dynamic response and air bearing resonance during flight (e.g., head-disk contact), thereby minimizing disruptions in the desired uniformity of flying height, are described. Embodiment head gimbal assemblies may comprise at least one air bearing surface of a slider and at least one suspension assembly wherein the at least one air bearing surface of the slider and the at least one suspension assembly are individually modeled. In addition, one of the at least one air bearing surface of the slider and one of the at least one suspension assembly may be matched to minimize air bearing resonance and system dynamic response. | 09-18-2008 |
20080231992 | Metal oxynitride adhesion/corrosion barrier layer and a diamond-like carbon overcoat - A method for forming a protective bilayer on a magnetic read/write head or magnetic disk. The bilayer is formed as an adhesion enhancing and corrosion resistant underlayer and a protective diamond-like carbon (DLC) overlayer. The underlayer is formed of transition metal oxynitride, having the general formula MeO | 09-25-2008 |
20080239572 | SUSPENSION WITH BI-LAYER FLEXURE BASE - A flexure with improved temperature sensitivity is disclosed. An embodiment of the present invention includes a bi-layered flexure that raises or lowers a read/write element a distance that is approximately equal to the distance of protrusion and retraction at varying temperatures. | 10-02-2008 |
20080239577 | BALANCED HGA FOR IMPROVED SEEKING PERFORMANCE - In a balanced head gimbal assembly for improved seeking performance, a slider having a magnetic head with a set of read elements to read data and a set of write elements to write data, an air-bearing surface, and a non-air-bearing surface is coupled to a suspension. The suspension includes a loadbeam, a flexure, and a balancing weight. The loadbeam is coupled to an actuator arm. The flexure, coupled to the loadbeam, has a window through which a dimple, coupled to the loadbeam, contacts a dimple contact point. The balancing weight, coupled to the flexure, has a configuration which permits alignment of a center of mass of the head gimbal assembly with the dimple contact point. | 10-02-2008 |
20080304181 | METHOD AND APPARATUS FOR PROVIDING AN AIR BEARING WITH HIGHER FLYING HEIGHT FOR LOWER ROTATING SPEED DRIVES - A method and apparatus for improving flying height stability at lower speeds is achieved by an ABS with a channel and pocket. The channel and pocket are configured to achieve a desired flying height profile. | 12-11-2008 |
20080316637 | NON-CONTACT MEASUREMENT OF SLIDER FLY HEIGHT BY ELECTROSTATIC FORCE - In a system and method for a non-contact measurement of the fly height of a slider above a magnetic data storage medium using electrostatic force, a slider with a read/write head flies over a magnetic data storage medium. A series of distinct voltages are applied between the slider and the magnetic data storage medium, and corresponding read-back signals are recorded. Using the recorded read-back signals, coefficients for an empirical curve-fit equation are calculated. The coefficients are normalized and converted into a fly height measurement. | 12-25-2008 |
20090009911 | Suspension With Locally Strengthened Gimbal - An apparatus with a head gimbal assembly designed to reduce movement and rotation of components of the head gimbal assembly structure is disclosed. One embodiment head gimbal assembly may comprise a flexure including a ramp limiter, a suspension assembly further comprising a suspension tongue, a slider further comprising a magnetic head; and a load beam further comprising a lift tab; and a ramp further comprising a step to engage and support the ramp limiter and support and constrain the movement of the slider. In certain embodiments, the flexure may further comprise a flexure rail located at its end to reduce movement and rotation of the suspension tongue. | 01-08-2009 |
20090135512 | ELECTRICAL CURRENT AS PROBE FOR MODULATION AT HEAD-DISK INTERFACE - A system and method for measuring the modulation between a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A magnetic read/write head is positioned above a magnetic storage medium at a given flying height. The magnetic read/write head reads a signal from the magnetic storage medium. A tester measures an alternating electric current between the magnetic read/write head through the slider and the magnetic storage medium. A computer may then calculate the modulation by the magnetic read/write head based on the alternating electric current. A DC voltage to the head may be applied to lower the flying height of the magnetic head. | 05-28-2009 |
20100307911 | Forming an aluminum alloy oxynitride underlayer and a diamond-like carbon overcoat to protect a magnetic recording head and media - A method for forming a protective bilayer on a magnetic read/write head or magnetic disk. The bilayer is formed as an adhesion enhancing underlayer and a protective diamond-like carbon (DLC) overlayer. The underlayer is formed of an aluminum or alloyed aluminum oxynitride, having the general formula AlO | 12-09-2010 |
20100310904 | Magnetic disk comprising an aluminum alloy oxynitride underlayer and a diamond-like carbon overcoat - A magnetic disk is protected by a bilayer. The bilayer is formed as an adhesion enhancing underlayer and a protective diamond-like carbon (DLC) overlayer. The underlayer is formed of an aluminum or alloyed aluminum oxynitride, having the general formula AlO | 12-09-2010 |
20110146047 | Balanced head gimbal assembly for improved seeking performance - In a balanced head gimbal assembly for improved seeking performance, a slider having a magnetic head with a set of read elements to read data and a set of write elements to write data, an air-bearing surface, and a non-air-bearing surface is coupled to a suspension. The suspension includes a loadbeam, a flexure, and a balancing weight. The loadbeam is coupled to an actuator arm. The flexure, coupled to the loadbeam, has a window through which a dimple, coupled to the loadbeam, contacts a dimple contact point. The balancing weight, coupled to the flexure, has a configuration which permits alignment of a center of mass of the head gimbal assembly with the dimple contact point. | 06-23-2011 |
20110299191 | Electrical current as probe for modulation at head-disk interface - A system and method for measuring the modulation between a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A magnetic read/write head is positioned above a magnetic storage medium at a given flying height. The magnetic read/write head reads a signal from the magnetic storage medium. A tester measures an alternating electric current between the magnetic read/write head through the slider and the magnetic storage medium. A computer may then calculate the modulation by the magnetic read/write head based on the alternating electric current. A DC voltage to the head may be applied to lower the flying height of the magnetic head. | 12-08-2011 |