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| Number | Title | Issue Date |
| 8189302 | Magnetic field sensor with graphene sense layer and ferromagnetic biasing layer below the sense layer A graphene magnetic field sensor has a ferromagnetic biasing layer located beneath and in close proximity to the graphene sense layer. The sensor includes a suitable substrate, the ferromagnetic biasing layer, the graphene sense layer, and an electrically insulating... | 05/29/2012 |
| 8174798 | Spin-torque oscillator, a magnetic sensor and a magnetic recording system In a spin-torque oscillator, a first ferromagnetic layer, a non-magnetic layer and a second ferromagnetic layer are stacked. A pair of electrodes perpendicularly applies a current onto each plane of the first ferromagnetic layer, the non-magnetic layer and the secon... | 05/08/2012 |
| 8164861 | Spin torque oscillator sensor employing antiparallel coupled oscilation layers A spin torque magnetoresistive sensor having a very small gap thickness. The sensor operates by measuring the change in frequency of a spin torque induced magnetic oscillation in magnetic layers of the sensor to detect the presence of a magnetic field. The sensor in... | 04/24/2012 |
| 8125742 | Fabrication of mesoscopic lorentz magnetoresistive structures A Lorentz Magnetoresistive sensor having an extremely small lead width and lead spacing is disclosed. The sensor can be constructed by a novel fabrication method that allows the leads to be deposited in such a manner that lead width and spacing between the leads is ... | 02/28/2012 |
| 8116042 | Magnetoresistance device A device capable of exhibiting the extraordinary magnetoresistance (EMR) effect includes an elongate channel formed of silicon. A conductor comprising heavily doped silicon is connected to the channel along one side of the channel so as to provide a shunt. A gate ar... | 02/14/2012 |
| 8098462 | Manufacturing method of thin-film magnetic head, wafer for thin-film magnetic head and thin-film magnetic head A manufacturing method of a thin-film magnetic head, includes a step of forming many thin-film magnetic heads arranged along row and column directions on a wafer, each of the thin-film magnetic heads having a read head element, a write head element, and pairs of pro... | 01/17/2012 |
| 8094417 | Magnetoresistance device A magnetoresistance device has a channel extending between first and second ends in a first direction comprising non-ferromagnetic semiconducting material, such as silicon, a plurality of leads connected to and spaced apart along the channel, a gate structure for ap... | 01/10/2012 |
| 8049996 | Coherent spin valve and related devices Embodiments of the present invention are directed toward the field of spintronics, and in particular, systems and devices capable of performing spin coherent quantum logic operations. The inventive spin valve comprises two ferromagnetic electrode layers, and a non-m... | 11/01/2011 |
| 8035927 | EMR magnetic sensor having its active quantum well layer extending beyond an over-lying semiconductor layer end with tab and lead structure for improved electrical contact An extraordinary magnetoresistive sensor (EMR sensor) having a lead structure that is self aligned with a magnetic shunt structure. To form an EMR sensor according to an embodiment of the invention, a plurality of layers are deposited to form quantum well structure ... | 10/11/2011 |
| 8035928 | High SNR CPP reader using high frequency standing wave interference detection An apparatus includes a current perpendicular to the plane sensing element, a DC current source connected to the sensing element, a microwave AC current source connected to supply AC current to the sensing element, and a detector for measuring a voltage representati... | 10/11/2011 |
| 8023230 | Magnetoresistive element including a pair of ferromagnetic layers coupled to a pair of shield layers A magnetoresistive element includes a pair of shield portions, and an MR stack and a bias magnetic field applying layer that are disposed between the pair of shield portions. The shield portions respectively include single magnetic domain portions. The MR stack incl... | 09/20/2011 |
| 8000062 | Enhanced magnetoresistance and localized sensitivity by gating in lorentz magnetoresistors A Lorentz magnetoresistive sensor that employs a gating voltage to control the momentum of charge carriers in a quantum well structure. A gate electrode can be formed at the top of the sensor structure to apply a gate voltage. The application of the gate voltage red... | 08/16/2011 |
| 7969690 | Tunneling magnetoresistive element which includes Mg-O barrier layer and in which nonmagnetic metal sublayer is disposed in one of magnetic layers In a tunneling magnetoresistive element, an insulating barrier layer is made of Mg—O, and a first pinned magnetic layer has a laminated structure in which a nonmagnetic metal sublayer made of Ta is interposed between a lower ferromagnetic sublayer and an upper fer... | 06/28/2011 |
| 7903378 | Magnetic head structure and method for manufacturing magnetic head structure A magnetic head substrate is provided with a recording element having a main magnetic pole layer and a recording-side monitor element including a resistance film, a lead conductor located as a layer below the resistance film, and a contact conductor for conductively... | 03/08/2011 |
| 7848059 | Magnetoresistive effect device and magnetic random access memory using the same A magnetoresistive effect element includes a magnetization fixed layer having substantially fixed magnetization direction. A magnetization variable layer has a variable magnetization direction, consists of a magnetic alloy that has a BCC structure and is expressed b... | 12/07/2010 |
| 7764468 | Method for removing smear and magnetic recording/reproducing apparatus with function of removing smear Provided is a smear-removing method that can remove smear of a manufactured thin-film magnetic head. The method is performed to a thin-film magnetic head including an MR effect element for reading data having two electrode layers sandwiching an MR effect multilayer ... | 07/27/2010 |
| 7751154 | Magnetic recording heads with bearing surface protections and methods of manufacture In one aspect described herein, a read head having one or more magnetoresistive (MR) sensors (or devices) is provided. In one example, the read head includes an MR sensor and an insulator layer disposed at the same level as the MR sensor. The read head further inclu... | 07/06/2010 |
| 7738219 | Narrow track extraordinary magneto resistive [EMR] device with wide voltage tabs and diad lead structure A Lorenz magnetoresistive sensor having a pair of voltage leads and a pair of current leads. The voltage leads are located at either side of one of the current leads and are separated by a distance that is substantially equal to the length of a bit to be measured. T... | 06/15/2010 |
| 7738217 | EMR magnetic head having a magnetic flux guide and a body formed at a tail end of a slider A magnetic head of the present application has a sensor which employs the extraordinary magnetoresistance (EMR) effect. The magnetic head includes a body of semiconductor material positioned over a tail end of a carrying mechanism; a field receiving surface of the b... | 06/15/2010 |
| 7738218 | Magnetic detection head and method for manufacturing the same A magnetic detection element capable of maintaining the ΔRA at a high level and reducing the magnetostriction by improving a material for a free magnetic layer, as well as a method for manufacturing the same, is provided. The free magnetic layer includes a laminate... | 06/15/2010 |
| 7688554 | Digital magnetoresistance sensor A digital MR sensor with a high magnetoresistance ratio is provided. The MR sensor includes a first magnetic element; and a second magnetic element at least a part of which is resiliently deformable so as to contact with or be separated from the first magnetic eleme... | 03/30/2010 |
| 7667934 | Adaptive read bias A read system for a hard disk drive comprising a disk having magnetic fields. The read system comprises a read element, a bias source, a temperature sensor, and a controller. The resistance of the read element changes based on the magnetic fields. The bias source ap... | 02/23/2010 |
| 7667933 | Magnetic oscillating device based on spin transfer torque and magnetic sensor using the same A magnetic oscillating device including a first magnetic resonance layer with a first magnetic resonance frequency f1, a second magnetic resonance layer with a second magnetic resonance frequency f2 higher than the first magnetic resonance freq... | 02/23/2010 |
| 7652852 | Magnetoresistance effect device and a preform therefor A method of production of a magnetoresistance effect device is able to prevent or minimize a drop in the MR ratio and maintain the high performance of the magnetoresistance effect device even if forming an oxide layer as a surface-most layer constituting a protectiv... | 01/26/2010 |
| 7580227 | Magnetic element, magnetic information reproducing head, and magnetic information reproducing apparatus A magnetic element has a first magnetic material exhibiting thermal fluctuation of magnetization which depends on an external magnetic field and generates spin fluctuation in conduction electrons; a nonmagnetic conductive material which is laminated on the first mag... | 08/25/2009 |
| 7508635 | Narrow track extraordinary magneto resistive [EMR] Device with wide voltage tabs An Extraordinary Magnetoresistive Sensor (EMR Sensor) having wide voltage lead tabs for reduced noise and increased signal to noise ratio. The leads can be formed in a triad structure, wherein a pair of voltage leads is located at either side of a current lead, or c... | 03/24/2009 |
| 7502206 | Multiple extraordinary magnetoresistive (EMR) sensor utilizing both current leads An extraordinary magnetoresistive device EMR sensor that is capable of reading two separate tracks of data simultaneously. The EMR sensor has a semiconductor structure with an electrically conductive shunt structure at one side. The other side of the semiconductor s... | 03/10/2009 |
| 7492554 | Magnetic sensor with tilted magnetoresistive structures A magnetic field sensor device comprising a substrate having at least a first tilted planar section having a surface normal at a first angle with respect to a surface normal of the substrate, and at least a first magnetoresistive layered structure positioned at the ... | 02/17/2009 |
| 7471491 | Magnetic sensor having a frequency filter coupled to an output of a magnetoresistance element A magnetic sensor includes a magnetoresistance element having a peak of a thermal fluctuation strength of magnetization under a magnetic field having a certain frequency, a frequency filter connected to the magnetoresistance element and having its transmittance decr... | 12/30/2008 |
| 7466521 | EMR structure with bias control and enhanced linearity of signal An extraordinary magnetoresistive device EMR having a discontinuous shunt structure. The discontinuous shunt structure improves the linearity of response of the EMR device. The EMR device includes a EMR heterostructure that includes an EMR active layer. The heterost... | 12/16/2008 |
| 7450348 | Electronic device, magnetoresistance effect element; magnetic head, recording/reproducing apparatus, memory element and manufacturing method for electronic device An electronic device free from variation of conductivity is provided. The electronic device 100 includes electrodes 2 and 3; and a metal conductor thin film 7 electrically connected to the electrodes 2 and 3. The metal condu... | 11/11/2008 |
| 7425456 | Antiferromagnetic stabilized storage layers in GMRAM storage devices A giant magnetoresistive memory device includes a magnetic sense layer, a magnetic storage layer, a non-magnetic spacer layer between the magnetic sense layer and the magnetic storage layer, and an antiferromagnetic layer formed in proximity to the magnetic storage ... | 09/16/2008 |
| 7414816 | Planar magnetic thin film head A magnetic head (slider) which requires no lapping is described. The head is fabricated with an air bearing surface that is parallel to the wafer surface. The saw cuts used to separate the individual sliders from the rest of the wafer are perpendicular to the air-be... | 08/19/2008 |
| 7382584 | Method to increase CCP-CPP GMR output by thermoelectric cooling The problem of increasing the output signal from a CCP-CPP GMR device without having it overheat has been overcome by placing materials that have different thermoelectric potentials on opposing sides of the spacer layer. Heat from the hot junction is removed at the ... | 06/03/2008 |
| 7379275 | Magneto-resistive head having a thermally conductive layer A magneto-resistive head, a magnetic tape and a magnetic tape recording/reproducing system, which are capable of suppressing the formation of protrusions around a magneto-resistive element, thereby preventing the occurrence of such problems as spacing loss and tape ... | 05/27/2008 |
| 7372673 | Magnetoresistive effect transducer having longitudinal bias layer and control layer directly connected to free layer In a magnetoresistive effect transducer including a pinning layer, a pinned layer, a free layer and a non-magnetic layer inserted between the pinned layer and the free layer, a longitudinal bias layer is connected directly to a part of the free layer to apply a bias... | 05/13/2008 |
| 7369374 | Current in plane magnetoresistive sensor having a contiguous hard bias layer located at back edge of stripe height A current in plane giant magnetoresistive (GMR) sensor having a hard bias layer that extends along the back edge (strip height) of the sensor rather than from the sides of the sensor. The hard bias layer preferably extends beyond the track width of the sensor. Elect... | 05/06/2008 |
| 7367110 | Method of fabricating a read head having shaped read sensor-biasing layer junctions using partial milling A method 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 and the hard bias layer. The method includes providing a layered wafer stack to be ... | 05/06/2008 |
| 7366009 | Separate write and read access architecture for a magnetic tunnel junction A magnetoresistive device is provided with separate read and write architecture. In one embodiment, a magnetic tunnel junction (MTJ) has a nonmagnetic nonconductive barrier layer sandwiched between two ferromagnetic conducting layers. A first read line is coupled to... | 04/29/2008 |
| 7357875 | Hybrid coating for magnetic heads A system and method for providing corrosion protection for a magnetic read/write head is disclosed. A monolayer surface coating is applied to cover those portions of the under layer of a magnetic read/write head not already covered by a previously applied diamond-li... | 04/15/2008 |
