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| Number | Title | Issue Date |
| 7839605 | Electrical signal-processing device integrating a flux sensor with a flux generator in a magnetic circuit An electrical signal processing device includes at least one thin film flux generator and at least one thin film magnetic sensor. Each flux generator includes at least one conductive induction line that is connected to at least one lead of a pair of input leads, and... | 11/23/2010 |
| 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 |
| 7317596 | Magnetic recording disk drive having read head with high cross-track resolution and disk with low bit-aspect-ratio A continuous-media or patterned-media disk drive with a low ratio of linear bit density in bits per inch (BPI) in the along-the-track direction to track density in tracks per inch (TPI) in the cross-track direction has a magnetoresistive read head with high cross-tr... | 01/08/2008 |
| 7292400 | Device for limiting current in a sensor A read/write device for a disk drive is disclosed. The read/write device includes a pre-amplifier and a recording head. The read/write device also includes a write signal path between the pre-amplifier and the recording head. The write signal path includes a write c... | 11/06/2007 |
| 7248436 | Thin film magnetic head and method of manufacturing the same Provided are a thin film magnetic head and a method of manufacturing the same, which can locally miniaturized a pole width with high accuracy. A thin film coil is provided in a region located more rearward than a position (a first position) of a rear end of a top sh... | 07/24/2007 |
| 7245463 | Apparatus for extended self-pinned layer for a current perpendicular to plane head A Giant Magneto-Resistive (GMR) sensor (900) having Current Perpendicular to Plane (CPP) structure provides an extended first pinned layer (914) as compared to second pinned layer (912) and free layer (910). Increased magnetoresistance ch... | 07/17/2007 |
| 7196882 | Magnetic tunnel junction device and its method of fabrication The present invention provides a magnetic tunnel junction memory element comprising two pinned ferromagnetic layers having magnetic orientations pointing in opposite directions and a sense layer arranged between the two pinned ferromagnetic layers and separated from... | 03/27/2007 |
| 7140094 | Magnetic head and production method for magnetic heads Magnetic heads capable of recording and reading with high sensitivity and resolution are provided by minimizing the outflow of magnetic fluxes from a flux guide to magnetic shields while using a flux guide structure for an MR element. In the magnetic head, magnetic ... | 11/28/2006 |
| 7126795 | Magnetic recording head, a magnetic reproducing head, a magnetic recording apparatus, and a magnetic reproducing apparatus A magnetic recording head, a magnetic reproducing head, a magnetic recording apparatus comprising the magnetic recording head, and a magnetic reproducing apparatus comprising the magnetic reproducing head are described. The magnetic reproducing head having a magneti... | 10/24/2006 |
| 7088548 | Perpendicular magnetic recording system To make a soft magnetic underlayer of a double layered perpendicular magnetic recording medium thinner than heretofore while avoiding saturation. Assuming that Tb1 is the thickness of the soft magnetic underlayer of the double layered perpendicular magnet... | 08/08/2006 |
| 7075757 | Thin-film magnetic head and method of manufacturing same A thin-film magnetic head comprises a reproducing head and a recording head. The reproducing head comprises: a GMR element; a bottom shield layer and a top shield layer for shielding the GMR element; conductive layers connected to the GMR element; and shield gap fil... | 07/11/2006 |
| 7042682 | Fully shielded perpendicular recoding writer Conventional perpendicular writers that utilize an extended return pole are subject to large flux leakage. This problem has been reduced in the prior art by adding a downstream shield. This still leaves significant upstream leakage. This has now been eliminated by a... | 05/09/2006 |
| 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) layer, and a flux guide that magnetically connects the sensing element to ... | 05/02/2006 |
| 7027269 | Method of manufacturing a magnetic head having a planar coil A simple method of manufacturing a magnetic head having a head face and including a planar magnetic coil (7) which extends parallel to the head face. According to the method, the magnetic coil is formed at a first side of a first substrate (1). Thereaf... | 04/11/2006 |
| 7006327 | Thin film recording head with a buried coil providing a shortened yoke and improved dimension control A writer for magnetic recording heads. The writer includes a bottom magnetic pole and a write gap formed over the bottom pole and a coil trench formed in the bottom pole. A top magnetic pole is provided as two layers with the first layer including front and back tip... | 02/28/2006 |
| 6985330 | High efficiency side-by-side thin film head utilizing canted shield yokes The present invention is a side-by-side inductive head structure having a considerably reduced separation between the read and write elements of the head structure. The present invention also provides a thin film inductive head design to minimize rework during a fab... | 01/10/2006 |
| 6940750 | Magnetic memory, magnetic memory array, method for fabricating a magnetic memory, method for recording in a magnetic memory and method for reading out from a magnetic memory A magnetic memory includes a magnetic substance composed of a disc-shaped first magnetic layer and a ring-shaped second magnetic layer which is formed on the first magnetic layer. ... | 09/06/2005 |
| 6930862 | Shielded extraordinary magnetoresistance head An extraordinary magnetoresistance (EMR) magnetic head is provided including a first shield and a second shield defining a gap adapted for being positioned over a magnetic recording disk. An EMR sensor is positioned between the first shield and the second shield. In... | 08/16/2005 |
| 6912772 | Method for shaping pole pieces of magnetic heads by chemical mechanical polishing A process for forming the P2 pole tip/yoke interface of a magnetic head that includes a second CMP polishing step that is performed on the surface of the write head wafer subsequent to the plating of the P2 pole tip thereon, and subsequent to a first C... | 07/05/2005 |
| 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 |
| 6829819 | Method of forming a magnetoresistive device A magnetoresistive device having a first pole, a second pole, and a first tapered pole pedestal therebetween and magnetically connected to the second pole. The first tapered pole has a width that increases with increasing distance away from the air bearing surface, ... | 12/14/2004 |
| 6765740 | Composite magnetic head, magnetic disk drive using the head, and control method for the magnetic disk A conventional magnetic head has a structure, in which a MR element and a recording element are stacked. The influence of a recording magnetic field on the magnetically sensitive portion of a reproduction element is lessened and the performance of the MR element is ... | 07/20/2004 |
| 6754947 | Method for forming a narrow track inductive write head having two-piece pole A process of forming a two-piece pole for an inductive write head involves first forming a first pole piece having a width between opposite side surfaces defining a gap width of a transducing gap at an air bearing surface of the head. The process next involves formi... | 06/29/2004 |
| 6737281 | Method of making transducer with inorganic nonferromagnetic apex region A method of making an inductive transducer having inorganic nonferromagnetic material disposed in an apex region adjacent to a submicron nonferromagnetic gap in a magnetic core. The inorganic nonferromagnetic apex region can be made by chemical etching of a layer of... | 05/18/2004 |
| 6729012 | Method of manufacturing a thin-film magnetic head A method of manufacturing a thin-film magnetic head comprises the steps of forming a bottom pole layer, forming a gap layer, forming a top pole layer, and forming a thin-film coil. The thin-film coil is wound around the top pole layer in a helical manner. In the ste... | 05/04/2004 |
| 6728080 | Magnetic head, magnetic recording and reproducing apparatus, method for reproducing and recording magnetic recording information A magnetic reproducing head and a magnetic recording head. The magnetic reproducing head includes a GMR or TMR magnetic sensor, and a flux guide for introducing a magnetic flux into the magnetic sensor. At least a portion of the flux guide includes a material which ... | 04/27/2004 |
| 6655009 | Dual mask process for making second pole piece layer of multiple write heads with high resolution narrow track width second pole tip A method of fabricating a second pole piece layer of a write head is constructed using first and second photoresist layers which are sensitive to light with different bandwidths. The second photoresist layer, which is on top of the first photoresist layer... | 12/02/2003 |
| 6621664 | Perpendicular recording head having integrated read and write portions An integrated read/write perpendicular recording head facilitates the use of magnetic storage media having a high magnetic recording density and high data rates. The use of a perpendicular write portion provides adequate space between the main and opposin... | 09/16/2003 |
| 6538855 | Magneto-resistive thin film magnetic head preventing entry of unnecessary magnetic flux and having good reproduction characteristics A magneto-resistive thin film magnetic head is provided, which magnetic head includes: a base; a first yoke provided on the base and separated by a gap into first and second portions, the first portion including a side which opposes a magnetic recording m... | 03/25/2003 |
| 6459552 | Thin film read head with coplanar pole tips A thin film magnetic head employs pole tips members which are coplanar in a plane across the write gap to produce a written track whose width is determined by the thickness of the pole tip members. The coplanar write structure may be combined with a multi... | 10/01/2002 |
| 6452759 | Yoke-type magnetoresistive (MR) head, yoke-type MR composite thin film head, and magnetic storage apparatus The present invention provides a yoke type magnetoresistive (MR) composite thin film head having no other gap than the recording/reproducing gap so as to increase the recording characteristics and reproduction characteristics. A magnetic gap 70 is formed ... | 09/17/2002 |
| 6324035 | Magnetic recording and reading device A magnetic recording and reading device having a magnetic head assembly in which a magnetic head is mounted on a suspension, an R/W-IC having a line width of not more than 0.35 μm and a magnetic disk medium having a magnetic recording layer formed on a s... | 11/27/2001 |
| 6286200 | Dual mask process for making second pole piece layer of write head with high resolution narrow track width second pole tip A method of making a second pole piece layer that has a yoke portion between a pole tip portion and a back gap portion comprising the steps of forming a first photoresist layer that is sensitive to a first bandwidth of light, forming a second photoresist ... | 09/11/2001 |
| 6195872 | Method of manufacturing a thin film magnetic head A method of manufacturing a thin film magnetic head including a first magnetic layer, a second magnetic layer, a gap layer, and a thin film coil consisting of one or more thin film coil layers. According to the method, the step of forming a first thin fil... | 03/06/2001 |
| 6191495 | Micromagnetic device having an anisotropic ferromagnetic core and method of manufacture therefor For use with an integrated circuit having a substrate and an insulator coupled to the substrate, a micromagnetic device and method of manufacturing therefor. In one embodiment, the micromagnetic device includes an adhesive coupled to the insulator and a f... | 02/20/2001 |
| 6134078 | High sensitivity, low distortion yoke-type magnetoresistive head In order to obtain a magnetoresistive head which is high in reproducing sensitivity, free from distortion in reproduced waveforms and suitable for high bit density recording, the an MR head includes a magnetic circuit including upper yoke 2 and lower yoke... | 10/17/2000 |
| 6130810 | Magnetic reluctance effect magnetic head with the connection length of the forward electrode less than the facing length of the magnetic gap A magnetic reluctance effect magnetic head in which a forward side electrode is stacked on at least the surface of a magnetic reluctance effect element facing a magnetic recording medium, and in which an upper magnetic pole is stacked on the forward side ... | 10/10/2000 |
| 6101067 | Thin film magnetic head with a particularly shaped magnetic pole piece and spaced relative to an MR element A thin film magnetic head has a main magnetic pole piece, a magnetoresistance effect element, a bias layer giving a bias magnetic field to the magnetoresistance effect element, an auxiliary magnetic pole piece and an insulating layer leaving a space betwe... | 08/08/2000 |
| 6078479 | Magnetic tape head with flux sensing element A thin film read-write magnetic head useful in a tape apparatus includes a magnetic circuit consisting of two thin film magnetic layers which form a magnetic yoke that is divided into three closely spaced sections, the central section of at least one of t... | 06/20/2000 |
| 6043947 | Magnetic storage and reproducing system with a low permeability keeper and a self-biased magnetoresitive reproduce head A magnetic storage system includes a magnetic storage medium comprising a keeper layer of relatively low permeability soft magnetic material deposited upon a magnetic storage layer or between multiple magnetic storage layers. The low permeability keeper l... | 03/28/2000 |
