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7616409 |
Magnetic sensor having a Ru/Si based seedlayer providing improved free layer biasing
A magnetoresistive sensor having a novel seed layer that allows a bias layer formed there over to have exceptional hard magnetic properties when deposited over a crystalline structure such as an...
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7596854 |
Method of fabrication for read head having shaped read sensor-biasing layer junctions using partial milling
A method is disclosed for fabricating a read head for a magnetic disk drive having a read head sensor and a hard bias layer, where the read head has a shaped junction between the read head sensor...
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7570461 |
Magnetic sensor with in-stack biasing
A magnetic sensor includes a sensor stack having a sensing layer. A first biasing structure having a first magnetization vector is positioned adjacent to the sensor stack to produce a biasing field...
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7497008 |
Method of fabricating a thin film magnetic sensor on a wafer
An embodiment of the invention is a magnetic head with overlaid lead pads that contact the top surface of the sensor between the hardbias structures and do not contact the hardbias structures which...
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7495871 |
Top formed grating stabilizer
A magneto-resistive sensor head and a method of manufacturing the magneto-resistive sensor head. The magneto-resistive sensor head includes a first lead and a second lead. A magneto-resistive layer...
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7469466 |
Method for providing a temporary, deep shunt on wafer structures for electrostatic discharge protection during processing
A method of temporarily protecting an electrically sensitive component from damage due to electrostatic discharge is disclosed. The method includes the steps of defining a first shield that forms a...
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7450353 |
Zig-zag shape biased anisotropic magnetoresistive sensor
A magnetoresistive sensing apparatus is disclosed, comprising a magnetic film having a zig-zag shaped structure, a central axis, and a magnetization associated with the magnetic film, wherein the...
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7377025 |
Method of forming an improved AP1 layer for a TMR device
A TMR read head with improved voltage breakdown is formed by laying down the AP1 layer as two or more layers. Each AP1 sub-layer is exposed to a low energy plasma for a short time before the next...
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7355825 |
Current-perpendicular-to-the-plane structure magnetoresistive element and head slider
A magnetoresistive film is interposed between domain controlling films in a current-perpendicular-to-the-plane (CPP) structure magnetoresistive element. The domain controlling films are designed to...
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7342752 |
Magnetoresistive read head having a bias structure with at least one dusting layer
A magnetoresistive read head includes a magnetoresistive sensor and a bias structure adjacent to the magnetoresistive sensor. The bias structure provides a magnetostatic bias field for the...
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7333307 |
Double layer longitudinal bias structure
It is necessary to stabilize the free layer of GMR or TMR devices by providing a longitudinal bias field. As read tracks become very narrow, this field can drastically reduce the strength of the...
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7265951 |
Hard bias structure with enhanced Hc
A magnetic head having a sensor with a free layer, the free layer having a magnetic moment. Hard bias layers are positioned towards opposite track edges of the sensor, the bias layers stabilizing...
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7199986 |
Magnetoresistive sensor with decoupled hard bias multilayers
A magnetic sensor is provided, having two bias layers separated by a decoupling layer to eliminate exchange coupling between the bias layers. The two bias layers may have differing coercivities,...
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7194797 |
Method for use in forming a read sensor for a magnetic head
Methods for use in forming a CPP read sensor for a magnetic head are disclosed. In a particular example, a plurality of read sensor layers are formed over a first shield layer and a resist without...
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7154717 |
Magnetoresistance effect film, magnetoresistance effect head and solid state memory
The magnetoresistance effect film is capable of performing enough function without employing an antiferromagnetic layer. The film comprises: a seed layer; a first pinned magnetic layer formed on...
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7139156 |
Non-penetration of periodic structure to PM
A magnetoresistive read head having a corrugated magnetoresistive layer wherein the corrugated section does not encroach on magnetic elements on either end of the magnetoresistive layer. The...
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7137192 |
Method for manufacturing thin film head
A thin film head comprising a GMR element formed of an antiferromagnetic layer, a pinning layer, a nonmagnetic conductive layer and a free magnetic layer; and a pair of the right and the left...
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7123456 |
Method of making magnetoresistive head element
A combined stripe of a magnetoresistive (MR) film and domain control stripe layers can be formed below a photoresist film on the surface of a substratum. An insulating base layer is then formed to...
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7112375 |
Seed layer structure for improved crystallographic orientation of a hard magnetic material
A seed layer structure for improved crystallographic orientation of grains in a hard magnetic material is disclosed. The seed layer structure is comprised of alternating layers of a metal and a...
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7103962 |
Method for manufacturing a thin film head
A magnetoresistive thin film head comprises a magnetoresistive element including an antiferromagnetic layer, a pinned layer, a nonmagnetic conductive layer and a free magnetic layer, and a pair of...
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7075761 |
Lead-defined and shaped magnetic sensor
A magnetic recording transducer, useful in a magnetic data storage device, having a read element with improved magnetic stability and a narrow track width is described. An MR stripe according to...
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7072156 |
Method for biasing magnetoresistive sensor with decoupled hard bias multilayers
A magnetic sensor is provided, having two bias layers separated by a decoupling layer to eliminate exchange coupling between the bias layers. The two bias layers may have differing coercivities,...
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7050274 |
Multilayer permanent magnet films
Multilayer permanent magnet films comprising at least two permanent magnet layers separated by an interlayer are disclosed. In one embodiment, the multilayer permanent magnet film includes an...
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7036208 |
Self aligned magnetoresistive flux guide read head with exchange bias underneath free layer
A magnetoresistive sensor for use in a data storage device has a recessed sensing element (magnetic tunnel junction, CPP spin valve, etc.) with an exchange biased sensing ferromagnetic (free)...
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7035061 |
Magnetoresistive transducer with low magnetic moment, high coercivity stabilizing magnets
A transducing head includes a first bias element, a second bias element, and a magnetoresistive sensor positioned between the first bias element and the second bias element. The first bias element...
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7020951 |
Method of making a merged magnetic read head and write head
An antiferromagnetic stabilization scheme is employed in a magnetic head for magnetically stabilizing a free layer of a spin valve. This is accomplished by utilizing an antiferromagnetic oxide film...
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7007374 |
Method of making a magnetic head
A narrow track width read sensor having a high magnetoresistive sensitivity is made using a self-aligned process which requires the use of only a single resist mask. A plurality of sensor layers is...
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7009822 |
AMR Sensor with a soft adjacent layer having high magnetization, high resistivity, low intrinsic anisotropy and near zero magnetostriction
A high magnetization, high resistivity, low corrosion and near zero magnetostriction soft adjacent layer (SAL) is provided for a magnetoresistive (MR) sensor of a read head. The MR sensor may...
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6961225 |
Magnetoresistance sensor having an antiferromagnetic pinning layer with both surfaces pinning ferromagnetic bias layers
A magnetoresistance sensor structure includes a magnetoresistance sensor having a sensor surface plane and having a free layer. An upper antiferromagnetic layer overlies at least a portion of the...
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6931713 |
Methods of making low loss, high frequency composite magnetic material
A high frequency, low loss, power, laminated magnetic material includes alternating magnetic plates of low hysteresis loss material and electrically insulating films. The multi-layer structure...
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6928723 |
Method for making a magnetoresistive sensor having a cobalt-ferrite pinning layer
An exchange-coupled magnetic structure of a cobalt-ferrite layer adjacent a magnetic metal layer is used in magnetorestive sensors, such as spin valves or tunnel junction valves. The...
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6910259 |
Method of making a spin valve read head with antiferromagnetic oxide film as longitudinal bias layer and portion of first read gap
An antiferromagnetic stabilization scheme is employed in a magnetic head for magnetically stabilizing a free layer of a spin valve. This is accomplished by utilizing an antiferromagnetic oxide film...
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6895658 |
Methods of manufacturing a tunnel magnetoresistive element, thin-film magnetic head and memory element
A TMR element includes: a free layer formed on a lower gap layer; a tunnel barrier layer formed on the free layer; and a pinned layer formed on the tunnel barrier layer. The pinned layer and the...
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6842312 |
Dual stripe read head with magnetic support structures which provide a uniform magnetic field for stabilization during manufacture
A method for stabilizing magnetic domains in dual stripe magnetic read heads is provided. This method first comprises providing a plurality of coupled magneto-resistive read elements in a spaced...
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6817086 |
Photolithographic process for extreme resolution of track width definition of a read head
A bilayer mask employed for lift off has a top strip which bridges between first and second bilayer portions and is completely undercut so that when one or more materials is sputter deposited the...
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6802114 |
Method of making a spin valve sensor of a read head with a triple antiparallel coupled free layer structure
A method of making a dual spin valve sensor includes the steps of forming first and second pinned layer structures, forming antiferromagnetic first and second pinning layers exchange coupled to the...
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6754048 |
Multiple magnetoresistive (MR) layer sensor element having longitudinal bias layers with non-parallel magnetizations
Within a method for forming a magnetoresistive (MR) sensor element there is first provided a substrate. There is then formed over the substrate a first magnetoresistive (MR) layer having formed...
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6747854 |
Multi-channel magnetic head with magnetoresistive elements
Multi-channel magnetic head having a high channel density, provided with a head face ( 1 ) which extends in a first direction (I) in which a record carrier is relatively movable with respect to...
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6741433 |
Magneto-resistive head and magnetic tunnel junction magneto-resistive head having plural ferromagnetic layers and an anitferromagnetically coupling layer
As to a magnetic tunnel junction magneto-resistive head, which comprises an antiferromagnetically coupling layer, a pinned ferromagnetic layer adjacent to said antiferromagnctically coupling layer...
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6727694 |
MR angle sensor
Magnetoresistive sensors for angle measurements such as, for example, the sensors of the type KMZ 41, manufactured and marketed by Philips Semiconductors, utilize the effect that a sufficiently...
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6717780 |
Magnetoresistive device and/or multi-magnetoresistive device
A magneto-resistive element includes a vertical current type magneto-resistive element; a first conductor for causing a current to flow into the vertical current type magneto-resistive element; and...
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6714389 |
Digital magnetoresistive sensor with bias
A magnetoresistive sensor for sensing a magnetic storage medium includes a free layer that has a magnetic anisotropy that supports stable magnetic states. A magnetic field generator biases the...
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6700761 |
Magnetic sensor
A magnetic sensor for reproducing information recorded on a magnetic recording medium senses an external magnetic field using a spin-filtered sensor current flowing through a non-magnetic layer.
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6662432 |
Method of making a free layer for a spin valve sensor with a lower uniaxial anisotropy field
A free layer for a spin valve sensor includes a cobalt iron (CoFe) film which has an easy axis oriented perpendicular to an air bearing surface (ABS) of a read head and a nickel iron (NiFe) film...
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6663987 |
Magnetroresistive element for effective sensing current flowing into multilayer film, and process for manufacturing the same
A magnetoresistive element includes an insulating layer formed between electrode layers, and the electrode layers are formed on a multilayer film so as to be in contact with the sides of the...
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6665156 |
Magnetoresistive head, manufacture thereof, and magnetic recording/reproducing apparatus with such magnetic head
By constituting a MR head with a pair of magnet films defining a recess on a lower gap layer, the recess having generally an inverted trapezoid shape in cross section; a magnetoresistive film...
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6663986 |
Magneto-resistive stripe element having a thin film conductor covered by a conductive capping layer
A magneto-resistive (MR) stripe element includes a magnetically active body portion and a tri-layer electrical conductor structure arranged proximate the magnetically active body portion. The...
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6661627 |
Magnetic recording device, method of adjusting magnetic head, and magnetic recording medium
A fixed magnetic recording device which can suppress dispersions appearing, upon manufacturing, on an effective track width and a longitudinal bias magnetic field of a magnetic head using a hard...
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6633466 |
MR thin film head with longitudinal-biasing multi-layers of antiferromagnetically-coupled high and low coercivity layers
A thin film head includes a GMR element formed of an antiferromagnetic layer, a pinning layer, a nonmagnetic conductive layer, a free magnetic layer, and a pair of the right and the left laminated...
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6587315 |
Magnetoresistive-effect device with a magnetic coupling junction
A magnetoresistive-effect device includes a multilayer film, hard bias layers arranged on both sides of the multilayer film, and electrode layers respectively deposited on the hard bias layers. The...
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