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| Number | Title | Issue Date |
| 8189303 | Thin film magnetic head having a pair of magnetic layers whose magnetization is controlled by shield layers A thin film magnetic head includes a magneto-resistance (MR) laminated body, a lower shield layer and an upper shield layer that face the first MR magnetic layer. The lower and upper shield layers respectively have first and second anti-parallel layers and first and... | 05/29/2012 |
| 8179642 | Magnetoresistive effect element in CPP structure and magnetic disk device An MR element in a CPP structure includes an MR part configured with a nonmagnetic layer, a first ferromagnetic layer that functions as first free layer and a second ferromagnetic layer that functions as a second free layer, and first and second ferromagnetic layers... | 05/15/2012 |
| 8149537 | Magnetic writer with multi-component shield A writer comprises a main pole, a write gap and a write shield. The main pole has a main pole tip for emitting magnetic flux. The write gap is adjacent the main pole tip along a center axis of the writer. The write shield is spaced from the main pole tip by the writ... | 04/03/2012 |
| 8125743 | Thin-film magnetic head, magnetic head assembly, magnetic disk drive apparatus and method for manufacturing thin-film magnetic head A thin-film magnetic head has a magnetoresistive effect read head element. The magnetoresistive effect read head element includes a lower shield layer, an upper shield layer, and a magnetoresistive effect layer formed between the lower shield layer and the upper shi... | 02/28/2012 |
| 8098463 | Current perpendicular to plane magnetoresistance read head design using a current confinement structure proximal to an air bearing surface A current to perpendicular to plane (CPP) magnetoresistance (MR) read head using current confinement proximal to an air bearing surface (ABS) is disclosed. A CPP MR read head includes a first shield, an MR sensor formed on the first shield, and a second shield conta... | 01/17/2012 |
| 8094419 | Optimized write pole flare angle for side shield or semi side shield PMR writer application Improved writability and a reduction in adjacent track erasure are achieved in a PMR writer with a large flare angle of 45 and 90 degrees in the main write pole and a full side shield or partial side shield configuration around the narrow write pole section and writ... | 01/10/2012 |
| 8089734 | Magnetoresistive element having a pair of side shields An MR element includes an MR stack disposed between first and second main shield portions, and a pair of side shields disposed on opposite sides of the MR stack in the track width direction. The first main shield portion includes a first exchange coupling shield lay... | 01/03/2012 |
| 8077435 | Current perpendicular-to-plane read sensor with back shield Disclosed is a read head for reading data from a magnetic media. The read head includes a bottom magnetic shield layer, a top magnetic shield layer, and a read sensor disposed between the bottom and top magnetic shield layers. The read sensor is configured for sensi... | 12/13/2011 |
| 8072710 | Thin-film magnetic head that locally projects an element part toward a recording medium by thermal expansion A thin-film magnetic head comprises a reproducing element formed on an undercoat film on a head substrate surface, a recording element formed on the upper side of the reproducing element, and a heater formed on the upper or lower side of the reproducing element, the... | 12/06/2011 |
| 8059370 | Reader shield/electrode structure A magnetic sensing device includes a first electrode, a second electrode, a first magnetic shield, a second magnetic shield, and a sensor. The first magnetic shield forms at least a portion of the first electrode. The second magnetic shield includes a first region t... | 11/15/2011 |
| 8059371 | Method to reduce sensitivity of a magnetic read-write head to external magnetic fields In a read-write head, the shields can serve as magnetic flux conductors for external fields, so that they direct a certain amount of flux into the recording medium. This problem has been overcome by the addition to the shields of a pair of tabs located at the edges ... | 11/15/2011 |
| 8054586 | Write head design and method for reducing adjacent track interference at very narrow track widths A perpendicular write head having a wrap around trailing shield for reducing stray field writing and adjacent track interference. A method for constructing such a write head allows for excellent control of side shield gap thickness and trailing shield gap thickness,... | 11/08/2011 |
| 8049997 | Magnetoresistive element including a pair of free layers coupled to a pair of shield layers A first shield portion located below an MR stack includes a first main shield layer, a first antiferromagnetic layer, and a first magnetization controlling layer including a first ferromagnetic layer exchange-coupled to the first antiferromagnetic layer. A second sh... | 11/01/2011 |
| 8040632 | Grounding structure of TMR and GMR heads with a flying on-demand heater A head for a hard disk drive. The head includes a substrate, a write element, a read element and a heater element. The head also includes a buffer layer between the read element and the substrate, and a first resistor connected to the heater element and the buffer l... | 10/18/2011 |
| 8035930 | Perpendicular magnetic recording write head with a side shield A side shield structure for a PMR write head is disclosed that narrows write width and minimizes adjacent track and far track erasure. The side shield structure on each side of the write pole has two sections. One section along the ABS and adjacent to the pole tip h... | 10/11/2011 |
| 8023231 | Composite shield structure of PMR writer for high track density Improved writability and a substantial reduction in adjacent track erasure are achieved by incorporating a composite shield structure in a PMR writer. There is a trailing shield formed a certain distance above the top surface of a write pole, a leading shield formed... | 09/20/2011 |
| 8014108 | Magnetoresistive device of the CPP type, utilizing insulating layers interposed in shield layers to form a closed magnetic path usable in a disk system The invention provides a magnetoresistive device of the CPP (current perpendicular to plane) structure, comprising a magnetoresistive unit, and a first shield layer and a second shield layer which are located and formed such that the magnetoresistive unit is sandwic... | 09/06/2011 |
| 8009391 | Magnetic sensing element and method for manufacturing the same An underlying layer is composed of Co—Fe—B that is an amorphous magnetic material. Thus, the upper surface of the underlying layer can be taken as a lower shield layer-side reference position for obtaining a gap length (GL) between upper and lower shields, resul... | 08/30/2011 |
| 8000063 | Magneto-resistive element, thin film magnetic head, magnetic head device, and magnetic recording/reproducing apparatus A magneto-resistive element includes a lower magnetic shield film and a magneto-resistive film disposed above the lower magnetic shield film. The lower magnetic shield film includes a lower shield layer and an upper shield layer. The upper shield layer is amorphous ... | 08/16/2011 |
| 8000064 | Thin-film magnetic head for perpendicular magnetic recording and method of making the same A perpendicular recording thin-film magnetic head comprises a main magnetic pole having a tip main magnetic pole part extending in a height direction from a medium-opposing surface and a base main magnetic pole part connected to the tip main magnetic pole part on a ... | 08/16/2011 |
| 7995311 | Magnetic shield, manufacturing method thereof and thin film magnetic head employing the same Embodiments of the present invention provide a magnetic shield composed of size-controlled small crystal grains and provide a more after-write read noise free thin film magnetic head. According to one embodiment of the present invention, an upper magnetic shield use... | 08/09/2011 |
| 7990659 | Magnetic head with protective films A magnetic head according to one embodiment includes a substrate; a sensor formed above the substrate; a second shield formed above the sensor and the substrate; a first insulation layer positioned between the substrate and the sensor; a second insulation layer posi... | 08/02/2011 |
| 7983009 | Magnetic recording/reproducing system, and thin-film magnetic head having shield layers of specified widths The invention provides a magnetic recording/reproducing system constructed such that until the skew angle is past the maximum skew angle αmax, the edges of the write shield layer and the edges of the lower read shield layer do not overlap on the same tra... | 07/19/2011 |
| 7983010 | Perpendicular magnetic recording head and perpendicular magnetic recording/reproducing head with at least one shield layer having a substantially arched portion A perpendicular magnetic recording head according to the present invention is composed of a first magnetic layer having a main magnetic pole exposed at a facing surface opposite a recording medium, a second magnetic layer adjacent to the first magnetic layer with an... | 07/19/2011 |
| 7978438 | Thin-film magnetic head with shield layer profile having obtuse or rounded corners, magnetic head assembly, magnetic disk drive apparatus and manufacturing method of thin-film magnetic head A thin-film magnetic head provided with at least one MR read head element includes a lower shield layer, an upper shield layer, and an MR layer formed between the lower shield layer and the upper shield layer. A profile of the upper shield layer, appeared at an ABS,... | 07/12/2011 |
| 7974048 | Magneto-resistive effect device of CPP type having shield layers coupled with ferromagnetic layers The invention provides a magneto-resistive effect device of the CPP (current perpendicular to plane) structure, having a magneto-resistive effect unit, and a first shield layer and a second shield layer located and formed such that the magneto-resistive effect unit ... | 07/05/2011 |
| 7961437 | Magnetic recording head having an extended stripe height and a shortened shield height Magnetic recording heads and associated methods of fabrication are disclosed. A magnetic recording head has a first shield and a magnetoresistance (MR) read element formed on the first shield. The first shield has a shield height that is defined by a distance betwee... | 06/14/2011 |
| 7961438 | Magnetoresistive device of the CPP type, and magnetic disk system The invention provides a magnetoresistive device of the CPP (current perpendicular to plane) structure, comprising a magnetoresistive unit, and a first shield layer and a second shield layer which are located and formed such that the magnetoresistive unit is sandwic... | 06/14/2011 |
| 7957105 | Shield in a magnetic device with reduced erase field A shield in a magnetic reader includes a magnetic layer having a first surface and a second surface. The magnetic layer includes at least one aperture that extends through the magnetic layer from the first surface to the second surface. Apertures can be provided in ... | 06/07/2011 |
| 7952838 | Read head for magnetic storage system A read head for a rotating magnetic storage system including concentric tracks is disclosed. The read head comprises a magnetoresistive (MR) sensor that reads information from a read track of the magnetic storage medium. First and second shields have a length greate... | 05/31/2011 |
| 7948716 | Magnetic head for perpendicular magnetic recording with a shield and a pole layer having a top surface with first and second portions at different heights, and method of manufacturing same A magnetic head includes: a coil; a pole layer; a shield having an end face located in a medium facing surface forward of an end face of the pole layer along a direction of travel of a recording medium; a gap layer between the shield and the pole layer; and a substr... | 05/24/2011 |
| 7933095 | Magnetic head for perpendicular magnetic recording including a stopper layer for suppressing protrusion of the front end face of a shield A magnetic head includes a pole layer and a shield. The shield includes a shield layer having a front end face located in the medium facing surface at a position forward of an end face of the pole layer along a direction of travel of the recording medium. The magnet... | 04/26/2011 |
| 7916429 | Magnetic field detecting element having thin stack with a plurality of free layers and thick bias magnetic layer A magnetic field detecting element comprising: a stack including an upper and magnetic layer, a lower magnetic layer, and a non-magnetic intermediate layer sandwiched therebetween, an upper and lower shield electrode layer provided in a manner that they sandwich sai... | 03/29/2011 |
| 7916430 | Thin-film magnetic head and manufacturing method thereof A thin-film magnetic head includes a lower magnetic shield layer, an MR multi-layered structure formed on the lower magnetic shield layer so that current flows in a direction perpendicular to surfaces of laminated layers, an upper magnetic shield layer formed on the... | 03/29/2011 |
| 7903371 | Perpendicular magnetic recording head and perpendicular magnetic recording/reproducing head having a magnetic shield layer with a thick edge portion A perpendicular magnetic recording head includes a first magnetic layer having a main magnetic pole exposed at a medium-facing surface that faces a recording medium; a second magnetic layer that faces the first magnetic layer with a nonmagnetic layer interposed ther... | 03/08/2011 |
| 7898773 | Perpendicular magnetic recording head with a side write shield A perpendicular magnetic recording (PMR) head is fabricated with a pole tip shielded laterally by a separated pair of side shields and shielded from above by an upper shield. The side shields are formed by a RIE process using specific gases applied to a shield layer... | 03/01/2011 |
| 7881019 | Two step corner recess for secondary stray field reduction in a perpendicular magnetic recording head A magnetic structure for use in a magnetic head for avoiding stray field writing. The magnetic structure can be for example a magnetic shield or could be a magnetic pole of a write head and is particularly advantageous for use in a perpendicular recording system, be... | 02/01/2011 |
| 7876534 | Magneto-resistive effect device of the CPP type, and magnetic disk system A magnetoresistive device comprising a magnetoresistive unit, an upper shield layer and a lower shield layer stacked such that the magnetoresistive unit is held between them. The magnetoresistive unit comprises a nonmagnetic metal intermediate layer, a first ferroma... | 01/25/2011 |
| 7876535 | Magnetoresistive device of the CPP type, and magnetic disk system A magnetoresistive device of a CPP (current perpendicular to plane) structure includes a magnetoresistive unit sandwiched between a first substantially soft magnetic shield layer from below, and a second substantially soft magnetic shield layer from above, with a se... | 01/25/2011 |
| 7872836 | Disk drive device In a disk drive device in which low-density gas is sealed, embodiments of the present invention help to improve joint reliability at a solder joint section between a feedthrough and an enclosure with respect to stress applied by deformation due to changes in tempera... | 01/18/2011 |
