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| Number | Title | Issue Date |
| 7975366 | Method of manufacturing a magnetic write head mold for neck height equalization A process to reduce the bevel angle in a mold used to form a write head is disclosed. First, tantalum is used instead of alumina for the yoke area. Then both the tantalum and the alumina areas are simultaneously subjected to reactive ion etching, leading to sloping ... | 07/12/2011 |
| 7978431 | Method to make a perpendicular magnetic recording head with a bottom side shield A perpendicular magnetic recording (PMR) head is fabricated with a pole tip shielded laterally by a separated pair of bottom side shields and shielded from above by an upper shield. The bottom side shields surround a lower portion of the pole tip while the upper por... | 07/12/2011 |
| 7832084 | Methods for recording servo information A method of recording servo information includes writing servo information in a data storage medium using a compound magnetic recording head. The compound magnetic recording head has a substrate including first and second magnetically permeable substrate portions an... | 11/16/2010 |
| 7765675 | CPP read sensors having constrained current paths made of lithographically-defined conductive vias and methods of making the same Current-perpendicular-to-plane (CPP) read sensors for magnetic heads having constrained current paths made of lithographically-defined conductive vias, and methods of making the same, are disclosed. In one example, a sensor stack structure which includes an electric... | 08/03/2010 |
| 7726008 | Method of forming a magnetic-field sensor having magnetic nanoparticles A magnetic-field sensor device comprises at least two electrodes; an insulating layer separating the at least two electrodes; at least one layer of chemically-synthesized magnetic nanoparticles disposed at or above a level with the insulating layer, and disposed bet... | 06/01/2010 |
| 7667928 | Thin-film magnetic head having a width-thickness configured shield layer positioned by spacer pieces for use in a head gimbal assembly of a hard disk system A write shield layer that forms a part of a thin-film magnetic head is set with respect to the widthwise full length W thereof lying substantially on an air bearing surface that is opposite to the recording medium such that when the full length W is trisected, the m... | 02/23/2010 |
| 7610673 | Method of manufacturing a vertical recording magnetic head A vertical recording magnetic head and a method of manufacturing the same is provided. The magnetic head includes a main magnetic pole layer on a surface opposite to a recording medium and a pair of neck height markers which is exposed on the surface around the main... | 11/03/2009 |
| 7549212 | Method of adjusting recession of an element of a slider A method and apparatus are provided for adjusting recession of an element, such as a pole tip, in a transducer structure formed in a plurality of thin film layers on an edge of a slider. A pre-stressed structure is formed as part of the plurality of thin film layers... | 06/23/2009 |
| 7530158 | CPP read sensor fabrication using heat resistant photomask A method is disclosed for fabricating a CPP read head for a magnetic disk drive having an electrical isolation layer. The method includes providing a first shield layer, depositing a sensor stack on the first shield layer, a CMP stop layer is deposited on the sensor... | 05/12/2009 |
| 7467459 | Method for manufacturing a 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... | 12/23/2008 |
| 7461445 | Method of manufacturing a magnetic head with a deposited shield A method for fabricating a non-electroplated shield using combination patterning and devices formed thereby are disclosed. The method includes depositing a metal layer, such as CZT, removing substantially 75% of the metal layer during a first phase using at least a ... | 12/09/2008 |
| 7430095 | Tapered write pole for reduced skew effect A write pole for a read/write head of a disk drive system has a tapered surface on a leading edge thereof. Preferably, the tapered surface has a taper angle of between 0 and 20 degrees from a plane normal to the ABS. By having a write pole with a taper in this manne... | 09/30/2008 |
| 7390529 | Free layer for CPP GMR having iron rich NiFe By using a free layer that includes a NiFe layer containing between 65 and 72 atomic percent iron, an improved CPP GMR device has been created. The resulting structure yields a higher CPP GMR ratio than prior art devices, while maintaining free layer softness and ac... | 06/24/2008 |
| 7383626 | Methods for fabricating giant magnetoresistive (GMR) devices In a method of fabricating a giant magnetoresistive (GMR) device a plurality of magnetoresistive device layers is deposited on a first silicon nitride layer formed on a silicon oxide layer. An etch stop is formed on the magnetoresistive device layers, and a second l... | 06/10/2008 |
| 7380330 | Method for making magnetic write head After defining the P2 pole of a magnetic read head, alumina is deposited over it and planarized by CMP, with the portion of the alumina overlaying the ABS region of the P2 pole subsequently being masked by a photoresist layer and with the portions of the alumina ove... | 06/03/2008 |
| 7370404 | Method for resetting pinned layer magnetization in a magnetoresistive sensor 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 ... | 05/13/2008 |
| 7370406 | Method of manufacturing a thin film structure A thin film magnetic head is described, the magnetic head having an insulating layer and a protrusion which has an upper portion and a base portion, and the upper portion has an extended portion. The insulating layer is present under the extending part. A method of ... | 05/13/2008 |
| 7372656 | disk drive with side erase control Embodiments of the invention provide a disk drive that is capable of effectively controlling a side erase, which is one of the problems with the use of the perpendicular recording technology. In one embodiment, tracks on a recording medium are formed concentrically ... | 05/13/2008 |
| 7369027 | High frequency magnetic thin film, composite magnetic thin film and magnetic device using them A high frequency magnetic thin film characterized by comprising a first layer made of a T-L composition (here, T is Fe or FeCo, and L is one or more of C, B, and N) and a second layer comprising a Co-based amorphous alloy arranged on either of the surfaces of the fi... | 05/06/2008 |
| 7369348 | Method and apparatus for adaptation to humidity in a hard disk drive Hard Disk Drive (HDD) including a humidity sensor. Humidity sensor communicating with embedded circuit to provide humidity reading to alter flying height control asserted to control vertical positioning of slider above disk surface. Method operating HDD using humidi... | 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 |
| 7365942 | Thin-film magnetic head A thin-film magnetic head for perpendicular magnetic recording comprises a coil, a main magnetic pole layer for performing perpendicular recording, a write shield layer and a write gap layer, wherein the main magnetic pole layer comprises a main pole film portion an... | 04/29/2008 |
| 7365408 | Structure for photolithographic applications using a multi-layer anti-reflection coating A bi-layer anti-reflective coating for use in photolithographic applications, and specifically, for use in ultraviolet photolithographic processes. The bi-layered anti-reflective coating is used to minimize pattern distortion due to reflections from neighboring feat... | 04/29/2008 |
| 7365948 | Exchange-coupled film, method for making exchange-coupled film, and magnetic sensing element including exchange-coupled film An exchange-coupled film includes a seed layer, an antiferromagnetic layer, and a ferromagnetic layer. The seed layer is formed at a thickness that is larger than the critical thickness, and the thickness of the seed layer is then decreased by etching so as to be sm... | 04/29/2008 |
| 7363699 | Method for manufacturing a magnetic read sensor employing oblique etched underlayers for inducing uniaxial magnetic anisotropy in hard magnetic bias layers A magnetoresistive sensor having a hard bias layer with an engineered magnetic anisotropy in a direction substantially parallel with the medium facing surface. The hard bias layer may be constructed of CoPt, CoPtCr or some other magnetic material and is deposited ov... | 04/29/2008 |
| 7360300 | Method for manufacturing a magnetic read sensor employing oblique etched underlayers for inducing uniaxial magnetic anisotropy in a hard magnetic pinning layer A magnetoresistive sensor having a hard magnetic pinning layer with an engineered magnetic anisotropy in a direction substantially perpendicular to the medium facing surface. The hard magnetic pinning layer may be constructed of CoPt, CoPtCr, or some other magnetic ... | 04/22/2008 |
| 7360299 | Method for manufacturing a magnetic read sensor employing oblique etched underlayers for inducing uniaxial magnetic anisotropy in a hard magnetic in-stack bias layer A magnetoresistive sensor having an in stack bias layer with an engineered magnetic anisotropy in a direction parallel with the medium facing surface. The in-stack bias layer may be constructed of CoPt, CoPtCr or some other magnetic material and is deposited over an... | 04/22/2008 |
| 7362544 | Thin film magnetic head slider, magnetic head support mechanism, magnetic disk drive, and method of manufacturing magnetic head A thermal flying height adjustment slider capable of being mounted on a small-sized thin film magnetic head slider is provided wherein terminals of an energizer serving as a heater prevent corrosion of pole pieces and the number of terminals is reduced. In one embod... | 04/22/2008 |
| 7359149 | Composite type thin-film magnetic head with reduced capacitance between leads for read and write head elements A composite type thin-film magnetic head is provided, which comprises: a write head element; a pair of terminal pads for the write head element; a pair of lead conductors for the write head element, electrically connecting the write head element to the pair of termi... | 04/15/2008 |
| 7355813 | Method of fabricating a narrow projection such as a write pole extending from a substrate An article is formed as a substrate having a projection extending outwardly therefrom. The article may be a magnetic recording head and the projection a write pole. The projection has a width in a thinnest dimension measured parallel to a substrate surface of no mor... | 04/08/2008 |
| 7352542 | Enhanced spin-valve sensor with engineered overlayer formed on a free layer A GMR sensor is disclosed for sensing magnetically recorded information on a data storage medium. The sensor includes a ferromagnetic free layer and a ferromagnetic pinned layer sandwiching an electrically conductive spacer layer. An engineered overlayer is formed o... | 04/01/2008 |
| 7343665 | Method of making current-perpendicular-to-the-plane structure magnetoresistive head The lower electrode is at least exposed at the surface of a substructure layer in a current-perpendicular-to-the-plane structure magnetoresistive element. A resist is formed to extend over the surface of the substructure layer. A patterning void is defined in the re... | 03/18/2008 |
| 7340822 | Insulator and manufacturing method thereof, and stator for electric rotating machine A stator for a motor includes a stator core, an insulator, and coils. The stator core includes an annular portion and teeth, which extend radially from the annular portion. The stator core is divided into core segments in the circumferential direction. Each core seg... | 03/11/2008 |
| 7337530 | Method for manufacturing a shielded pole magnetic head for perpendicular recording A method of making a perpendicular magnetic recording head for use in a data storage device includes forming a first pole layer, a second pole layer, a third pole layer, and a shield layer of a write section. The first pole layer, second pole layer, third pole layer... | 03/04/2008 |
| 7337529 | Method for forming an electrical interconnect to a spring layer in an integrated lead suspension A method for forming an electrical interconnect to the spring metal layer in an integrated lead suspension or suspension component of the type having a multi-layer structure including a spring metal layer and a conductor layer separated by a dielectric insulator lay... | 03/04/2008 |
| 7336452 | Patterned exchange bias GMR using metallic buffer layer In magnetic read heads based on bottom spin valves the preferred structure is for the longitudinal bias layer to be in direct contact with the free layer. Such a structure is very difficult to manufacture. The present invention overcomes this problem by introducing ... | 02/26/2008 |
| 7333304 | CPP sensor having hard bias stabilization placed at back edge of the stripe A current perpendicular to plane (CPP) having hard magnetic bias layers located at the back of the sensor, opposite the air bearing surface. The bias layer is magnetostatically coupled with the free layer to bias the free layer in a desired direction parallel with t... | 02/19/2008 |
| 7333296 | Magnetic head for perpendicular magnetic recording including pole-layer-encasing layer that opens in the top surface thereof and nonmagnetic conductive layer disposed on the top surface of the pole-layer-encasing layer A pole layer is disposed in a groove of a pole-layer-encasing layer made of a nonmagnetic material with a nonmagnetic film disposed between the encasing layer and the pole layer. A polishing stopper layer made of a nonmagnetic conductive material is disposed on the ... | 02/19/2008 |
| 7333306 | Magnetoresistive spin valve sensor with tri-layer free layer A TMR sensor, a CPP GMR sensor and a CCP CPP GMR sensor all include a tri-layered free layer that is of the form CoFe/CoFeB/NiFe, where the atom percentage of Fe can vary between 5% and 90% and the atom percentage of B can vary between 5% and 30%. The sensors also i... | 02/19/2008 |
| 7325296 | Method of fabricating a magnetic head A magnetic head having a magnetic shield and/or pole layer that is fabricated as a plurality of laminated layers, in which each layer includes a sublayer thickness of Fe(N) and a sublayer thickness of NiFe(N), and where the relative thickness of these two sublayers ... | 02/05/2008 |
