Patent application number | Description | Published |
20090059437 | DIFFERENTIAL CURRENT PERPENDICULAR TO PLANE GIANT MAGNETORESISTIVE SENSOR STRUCTURE HAVING IMPROVED ROBUSTNESS AGAINST SPIN TORQUE NOISE - A differential giant magnetoresistive sensor for sensing a magnetic signal. The differential sensor has a structure configured to minimize spin torque noise. The differential magnetoresistive sensor includes first and second magnetoresistive sensor elements and a three lead structure including an inner lead sandwiched between the first and second sensor elements and first and second outer leads. each of the sensor elements includes an antiparallel coupled free layer structure with the free layer of each of the sensor elements preferably being positioned near the inner lead. The three lead structure allows sense current to be supplied to the sensor such that electrons travel first through the free layer of each sensor element and then through the pinned layer structure. | 03-05-2009 |
20090080122 | CURRENT PERPENDICULAR TO PLANE GMR AND TMR SENSORS WITH IMPROVED MAGNETIC PROPERTIES USING Ru/Si SEED LAYERS - A magnetoresisive sensor having a thin seed layer that provides an exceptionally smooth interface between layers of the sensor stack. The exceptionally smooth interface provided by the seed layer reduces interlayer exchange coupling allowing the non-magnetic spacer layer (or barrier layer) to be very thin. The seed layer includes a thin layer of Ru and a thin layer of Si which intermix to form a homogeneous, amorphous thin seed layer of Ru-silicide. | 03-26-2009 |
20090086385 | CURRENT PERPENDICULAR TO PLANE MAGNETORESISTIVE SENSOR WITH REDUCED READ GAP - A magnetoresistive sensor having a greatly reduced read gap. The sensor has a pinned layer structure formed above the free layer. A layer of antiferromagnetic material (AFM layer) is formed over the pinned layer structure and has a front edge disposed toward, but recessed from the air bearing surface. An electrically conductive, magnetic lead is formed over the pinned layer and AFM layer such that the lead fills a space between the AFM layer and the air bearing surface. In this way, the read gap is distance between the outermost portion of the pinned layer structure and free layer. The thickness of the AFM layer and capping layer are not included in the read gap. | 04-02-2009 |
20090155629 | TUNNEL JUNCTION MAGNETORESISTIVE SENSOR HAVING A NEAR ZERO MAGNETOSTRICTION FREE LAYER - A magnetoresistive tunnel junction sensor having improved free layer stability, as well as improved free sensitivity. The free layer is constructed to have a low magnetic coercivity which improves free layer sensitivity. The free layer is also constructed to have a negative magnetostriction which improves free layer stability by preventing the free layer from having an easy axis that is oriented perpendicular to die air bearing surface. | 06-18-2009 |
20090246890 | METHOD FOR MANUFACTURING A TUNNEL JUNCTION MAGNETORESISTIVE SENSOR WITH IMPROVED PERFORMANCE AND HAVING A CoFeB FREE LAYER - A method for manufacturing a magnetoresistive sensor that provides increased magnetoresistive performance. The method includes forming a series of sensor layers with at least one layer containing CoFeB, and having a first capping layer thereover. A high temperature annealing is performed to optimize the grains structure of the sensor layers. The first capping layer is then removed, such as by reactive ion etching (RIE). An antiferromagnetic layer is then deposited followed by a second capping layer. A second annealing is performed to set the magnetization of the pinned layer, the second annealing being performed at a lower temperature than the first annealing. | 10-01-2009 |
20090262464 | PERPENDICULAR MAGNETIC WRITE HEAD HAVING A WRAP AROUND SHIELD CONSTRUCTED OF A LOW PERMEABILITY MATERIAL FOR REDUCED ADJACENT TRACK ERASURE - A magnetic write head for perpendicular magnetic recording having a trailing, wrap around magnetic shield constructed of a low magnetic permeability. The lower permeability of the shield prevents magnetic saturation of the shield, which in turn prevents adjacent track interference such as adjacent track erasure. The shield can also be constructed as a pure trailing shield, or as first and second side shields without any trailing shield portion. | 10-22-2009 |
20090284873 | CURRENT PERPENDICULAR TO PLANE MAGNETORESISTIVE SENSOR EMPLOYING HALF METAL ALLOYS FOR IMPROVED SENSOR PERFORMANCE - A magnetoresistive sensor having employing a Mn containing Huesler alloy for improved magnetoresistive performance in a structure that minimizes corrosion and Mn migration. The sensor can be constructed with a pinned layer structure that includes a lamination of layers of Co | 11-19-2009 |
20090296284 | MAGNETORESISTIVE SENSOR DESIGN FOR SIGNAL NOISE PICKUP REDUCTION FOR USE WITH DEEP GAP ELECTROSTATIC DISCHARGE SHUNT - A magnetic head having an electrostatic shunt structure for preventing damage to the magnetic head during manufacture. A portion of the shunt structure is removed during manufacture, however another portion remains. In order to prevent the remaining portions of the shunt structure from picking up stray magnetic and electromagnetic fields, an electromagnetic shield, is provided between the remaining portions of the shunt structure and the substrate. | 12-03-2009 |
20100097729 | CPP DUAL FREE LAYER MAGNETORESISTIVE HEAD FOR MAGNETIC DATA STORAGE - A magnetoresistive sensor having a scissor free layer design and no pinned layer. The sensor includes first and second free layers that have magnetizations that are oriented at 90 degrees to one another and has a third magnetic layer with a magnetization that is antiparallel coupled with one of the free layers. The antiparallel coupling of the third magnetic layer with one of the free layers, allows the sensor to be used in a tunnel valve design, having an electrically insulating barrier layer between the free layers. The tunnel valve design reduces spin torque noise in the sensor, and the presence of the third magnetic layer allows the free layers to remain bias at 90 degrees to one another in spite of interfacial coupling through the very thin barrier layer. | 04-22-2010 |
20100103783 | THERMALLY ASSISTED MAGNETIC HEAD - A magnetic write head arranged to maximize efficiency of an optical device used to locally heat a magnetic medium during use, also to maximize efficiency of a heater element for thermal fly height control. The magnetic head is constructed with a read head, a write head and a slider body. The write head is located between the read head and the slider body. A heater element can be located between the read head and the write head and an optical device such as an optical waveguide can be located between the write head and the slider body. The write head can be constructed to have a write pole that is closer to the slider body than the return pole is, thereby allowing the write pole to be adjacent to the optical device. | 04-29-2010 |