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| Number | Title | Issue Date |
| 7349180 | Magnetic head assembly that has an air bearing surface First, second and third pole tip components of a write head are formed with the second pole tip located between the first and third components and a write gap layer located between the first and second pole tip components. The second pole tip is formed with a width ... | 03/25/2008 |
| 7325294 | Method of making electromagnetic wave shielded write and read wires on a support for a magnetic media drive A method of making electromagnetic wave shielded read and write wires is provided. The method includes forming a bottom insulation layer on a bottom shield layer formed on a substrate. Then, forming electrically conductive wire material into openings in a first form... | 02/05/2008 |
| 7177120 | Self-pinned spin valve sensor with a high coercivity antiparallel (AP) pinned layer A magnetic head assembly has a read head that includes a sensor wherein the sensor includes a self-pinned antiparallel (AP) pinned layer structure, a ferromagnetic free layer structure that has a magnetic moment that is free to rotate in response to signal fields an... | 02/13/2007 |
| 7133264 | High resistance sense current perpendicular-to-plane (CPP) giant magnetoresistive (GMR) head A current-perpendicular-to-plane (CPP) spin valve (SV) sensor and fabrication method with a contiguous junction type geometry that increases sensor resistance by up to two orders of magnitude over conventional CPP GMR geometry for a particular track read-width. The ... | 11/07/2006 |
| 7130153 | Stitched write head with staircase P2 defined throat height A magnetic write head assembly has a head surface and a track width at the head surface wherein the head surface forms a first vertical plane and wherein the head assembly includes first and second pole pieces, a write gap located between the first and second pole p... | 10/31/2006 |
| 7126796 | Read sensor with overlaying lead layer top surface portions interfaced by hard bias and tapered lead layers A read head, which has a head surface facing a moving magnetic medium, includes a read sensor that has first and second side top surface portions and a central top surface portion located between the first and second side top surface portions. First and second overl... | 10/24/2006 |
| 7084467 | Spin valve transistor with self-pinned antiparallel pinned layer structure A spin valve transistor includes an emitter, a collector, a base between the emitter and the collector, a spin valve which includes a free layer structure, a self-pinned antiparallel (AP) pinned layer structure and a nonmagnetic spacer layer between the free layer s... | 08/01/2006 |
| 7061728 | High linear density read head with a contiguous junction and minimal shield shorts In a magnetic head a read sensor is located between first and second read gap layers wherein the first read gap layer includes a read gap material layer and first and second refill gap layers. The read gap material layer has first and second depressions which extend... | 06/13/2006 |
| 7054117 | Method of making a read head having a tunnel junction sensor with a free layer biased by exchange coupling with insulating antiferromagnetic (AFM) layers Longitudinal biasing of a free layer in a current perpendicular to the planes of the layers (CPP) type of sensor in a read head is implemented by pinning magnetic moments of first and second side portions of the free layer beyond the track width of the read head wit... | 05/30/2006 |
| 7038890 | Current perpendicular to the planes (CPP) sensor with a highly conductive cap structure A magnetic read head has a current perpendicular to the planes (CPP) sensor with a top cap layer that is ruthenium (Ru) or rhodium (Rh) or a top cap layer structure which includes a first layer of tantulum (Ta) only, a second layer of ruthenium (Ru), rhodium (Rh) or... | 05/02/2006 |
| 7031121 | Perpendicular recording magnetic head with a write shield magnetically coupled to a first pole piece A perpendicular recording write head has ferromagnetic first and second pole pieces which are connected at a back gap and an insulation stack with a write coil layer embedded therein is located between the first and second pole pieces and between a head surface of t... | 04/18/2006 |
| 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 below a spin valve sensor in a read region and first and second lead... | 04/04/2006 |
| 6988308 | Method of initializing hard bias of a magnetic read head Hard biasing of a magnetoresistive sensor or a spin valve sensor in a magnetic read head is initialized by repeatedly applying a magnetic field to the hard biasing at any level of fabrication of the magnetic read head or any combination of levels of fabrication of t... | 01/24/2006 |
| 6967825 | GMR read sensor with an antiparallel (AP) coupled free layer structure and antiparallel (AP) tab ends utilizing a process stop layer to protect the bias layer A GMR sensor has a head surface with an active region and first and second inactive regions along the head surface with the active region being located between the first and second inactive regions, and includes an antiparallel (AP) coupled free layer structure havi... | 11/22/2005 |
| 6952326 | High data rate write head A magnetic head assembly includes first and second pole pieces and first and second coil layers wherein the second pole piece has a ferromagnetic pole tip which forms a portion of an air bearing surface and defines a track width of a write head. A write gap layer is... | 10/04/2005 |
| 6925702 | Method of making a horizontal thin film write and read head A horizontal combined head is provided which has both a thin film write and an MR read element located at an air bearing surface (ABS). The read element can be formed with a track width that is independent of the track width of the write element. The MR sensor or th... | 08/09/2005 |
| 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 below a spin valve sensor in a read region and first and second lead... | 06/28/2005 |
| 6891704 | Tunnel junction sensor with a smooth interface between a pinned or free layer and a barrier layer A method of making provides a smooth surface of a pinned or free layer interfacing a barrier layer in a tunnel junction sensor wherein the smooth surface is an oxidized monolayer of the pinned or free layer. After sputter depositing the pinned or free layer the laye... | 05/10/2005 |
| 6888705 | High linear density tunnel junction flux guide read head with in-stack longitudinal bias stack (LBS) Several embodiments of a sense current perpendicular to the planes of the sensor (CPP) and flux guide type of read head has a gap between first and second shield layers at an air bearing surface (ABS) where the flux guide is located which is less than a gap between ... | 05/03/2005 |
| 6878240 | Apparatus and method for obtaining symmetrical junctions between a read sensor and hard bias layers A sputtering system is provided with a substrate and a sputtering material layer that are located in a sputtering chamber. The sputtering material layer has a sputtering surface where atoms of the material are sputtered and the substrate has a forming surface with a... | 04/12/2005 |
| 6876507 | High-saturation thin-film write head for high-coercivity magnetic data storage media A thin-film write head employing pole pieces formed of an electroplated body-centered cubic (BCC) nickel-iron alloy with a saturation flux density (BS) of 1.9 to 2.3 T (19 to 23 kG) and an acceptable coercivity (HC) of about 80 to about 160 A/m... | 04/05/2005 |
| 6873499 | Read head having high resistance soft magnetic flux guide layer for enhancing read sensor efficiency A read head has a flux guide layer that is immediately adjacent (abuts) the back edge of a read sensor. The flux guide layer is made of a high resistance soft magnetic material that conducts magnetic flux from the back edge of the read sensor so that the magnetic re... | 03/29/2005 |
| 6870717 | Semiconductor slider with an integral spin valve transistor structure and method for making same without a bonding step A semiconductor slider including an integral spin valve transistor (SVT) having a read width of 250 nm or less disposed on a monolithic semiconductor substrate, useful in magnetic data storage applications. The monolithic slider may also include other magnetic and s... | 03/22/2005 |
| 6866751 | Method of setting self-pinned AP pinned layers with a canted field A spin valve sensor in a read head has a spacer layer which is located between a self-pinned AP pinned layer structure and a free layer structure. The free layer structure is longitudinally stabilized by first and second hard bias layers which abut first and second ... | 03/15/2005 |
| 6865062 | Spin valve sensor with exchange biased free layer and antiparallel (AP) pinned layer pinned without a pinning layer A spin valve sensor includes an antiparallel (AP) pinned layer structure which is self-pinned without the assistance of an antiferromagnetic (AFM) pinning layer. A free layer of the spin valve sensor has first and second wing portions which extend laterally beyond a... | 03/08/2005 |
| 6862798 | Method of making a narrow pole tip by ion beam deposition A method of making a magnetic head assembly wherein the magnetic head assembly has a write head with a pole tip includes the steps of forming a shaping layer on an underlying layer wherein the shaping layer has a side surface and a top surface, ion beam sputter depo... | 03/08/2005 |
| 6857181 | Method of making a T-shaped write head with less side writing First, second and third pole tip components of a write head are formed with the second pole tip located between the first and third components and a write gap layer located between the first and second pole tip components. The second pole tip is formed with a width ... | 02/22/2005 |
| 6859348 | Hard biased self-pinned spin valve sensor with recessed overlaid leads A spin valve sensor has an antiparallel (AP) pinned layer structure which has ferromagnetic first and second AP pinned layers that are separated by an antiparallel coupling layer. The first and second AP pinned layers are self-pinned antiparallel with respect to one... | 02/22/2005 |
| 6856493 | Spin valve sensor with in-stack biased free layer and antiparallel (AP) pinned layer pinned without a pinning layer A spin valve sensor has an antiparallel (AP) pinned layer structure which has ferromagnetic first and second AP pinned layers that are separated by an antiparallel coupling layer. The first and second AP pinned layers are self-pinned antiparallel with respect to one... | 02/15/2005 |
| 6833982 | Magnetic tunnel junction sensor with a free layer biased by longitudinal layers interfacing top surfaces of free layer extensions which extend beyond an active region of the sensor A magnetic tunnel junction (MTJ) sensor in which the free layer longitudinal biasing elements are coupled, without insulation, to the free layer outside of the MTJ stack to provide reliable non-shunting MTJ free layer stabilization without extremely thin dielectric ... | 12/21/2004 |
| 6831816 | CPP sensor with in-stack biased free layer A magnetic head assembly includes a read head with a current perpendicular to the planes (CPP) sensor. The CPP sensor includes an AP pinned layer structure, a free layer and a spacer layer which is located between the free layer and the AP pinned layer structure. An... | 12/14/2004 |
| 6826014 | Write head having first pole piece with frequency dependent variable effective throat height A write head has a variable throat height wherein the throat height is dependent upon the frequency of operation of the write head. At high frequency operation the throat height is small and at low frequency operation the throat height is large. The write head write... | 11/30/2004 |
| 6820322 | Method of making a spin valve sensor with a free layer structure sputter deposited in a nitrogen atmosphere A method makes a spin valve sensor of a magnetic read head which includes the steps of forming a ferromagnetic pinned layer structure that has a magnetic moment, forming a pinning layer exchange coupled to the pinned layer structure for pinning the magnetic moment o... | 11/23/2004 |
| 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 materials do not form fences abutting recessed edges of a bottom layer... | 11/16/2004 |
| 6819530 | Current perpendicular to the planes (CPP) sensor with free layer stabilized by current field A magnetic head assembly includes a first lead that is electrically connected to a CPP sensor for conducting a current through the sensor perpendicular to major planes of the layers of the sensor. A second lead extends from a stripe height of the sensor into the hea... | 11/16/2004 |
| 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 first and second pinned layer structures, forming an antiparallel (A... | 10/12/2004 |
| 6800178 | Method of making NiFeCo-O-N or NiFeCo-N films for shields and/or poles of a magnetic head A specified amount of N2O or N2 is employed in a process gas of a DC magnetron for sputter depositing single or laminated films of NiFeCo—O—N or NiFeCo—N with a high uniaxial anisotropy HK after annealing these films along thei... | 10/05/2004 |
| 6785953 | Process of fabricating a write head with protection of a second pole tip thickness A method of making a magnetic head, which has an air bearing surface (ABS) and a back gap (BG), comprising the steps of: forming a second pole tip of a second pole piece with a top surface and a bottom surface at an ABS site for said ABS; the top surface of the seco... | 09/07/2004 |
| 6788481 | Process for measuring nonlinear transition shift (NLTS) at high recording densities with a giant magetoresistive (GMR) head A nonlinear transition shift (NLTS) measurement procedure for read/write heads employing a giant magnetoresistive (GMR) merged heads. The method of this invention includes the pulse-shape distortion effects on recording nonlinearity, which can significantly affect t... | 09/07/2004 |
| 6785101 | Overlaid lead giant magnetoresistive head with side reading reduction The first and second side surfaces of either a bottom spin valve sensor or a top spin valve sensor are notched so as to enable a reduction in the magnetoresistive coefficient of side portions of the sensor beyond the track width region thereby minimizing side readin... | 08/31/2004 |
