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| Number | Title | Issue Date |
| 8139322 | Magnetic recording head with protruding spin torque oscillator A magnetic recording head includes: a main magnetic pole; a laminated body; and a pair of electrodes operable to pass a current through the laminated body. The laminated body includes a first magnetic layer, a second magnetic layer, and an intermediate layer provide... | 03/20/2012 |
| 8094418 | Vertically stacked DFH heater design for protrusion shape control A vertically stacked DFH design in a read/write head is disclosed that allows independent control of write gap protrusion and read gap protrusion. A first heater is formed in an insulation layer proximate to a sensor in a read head. A second heater is formed in a se... | 01/10/2012 |
| 8035920 | Perpendicular magnetic recording head having coil portions above a main pole and provided with different cross-sectional shapes and method of manufacturing the same A perpendicular magnetic recording head and a method of manufacturing the same are provided. The perpendicular magnetic recording head that includes a main pole, a return yoke, and coils that surround upper and lower parts of the main pole in a solenoid shape so tha... | 10/11/2011 |
| 8004799 | Magnetic reader with piggybacked fence A magnetic head comprises a plurality of elements selected from a group consisting of readers and writers. A servo sensor is positioned towards the elements, the servo sensor being adapted for sensing a first servo track of a magnetic medium. A fence is positioned t... | 08/23/2011 |
| 7969691 | Magnetic head and magnetic disk system having a read sensor and a sensing current A read sensor is disposed near a main pole, thereby reducing the distance between the read sensor and a write sensor. In this case, however, a magnetic field generated from the main pole affects magnetization of a free layer and a pinned layer of a magnetoresistive ... | 06/28/2011 |
| 7821745 | Thin-film magnetic head in which perpendicular magnetic record head overlaps on reproducing head A thin-film magnetic head is provided. The thin-film magnetic head includes a return-yoke layer formed on an opposed surface such that a maximum length of the return-yoke layer is shorter than a longer length of the length of the upper shield layer and the lower shi... | 10/26/2010 |
| 7782574 | Magnetic heads disk drives and methods with thicker read shield structures for reduced stray field sensitivity A head of a disk drive comprises a read element, a top read shield, a bottom read shield, a stray field shield, and an exchange decoupling layer. The read element allows for reading magnetic fields from a recording medium. The top read shield, the bottom read shield... | 08/24/2010 |
| 7729092 | Shielded pole writer under reader A read/write head for a disk drive having a magnetoresistive (MR) read element and an inductive write element suitable for perpendicular recording of data onto a disk having a media layer in which the data is stored perpendicularly to the planar surface of the disk ... | 06/01/2010 |
| 7672084 | Composite thin-film magnetic head with non-magnetic conductive layer electrically connected with lower pole layer to increase counter electrode area Composite thin-film magnetic head includes a substrate; a first insulation layer on the substrate; an MR read head element on the first insulation layer and provided with a lower shield layer, an upper shield layer and an MR layer with a sense current flowing perpen... | 03/02/2010 |
| 7623322 | Thin-film magnetic head with heater spaced further from medium facing surface than split in shield The present invention relates to a thin-film magnetic head with a heater. A thin-film magnetic head includes a substrate, a magnetic read head element that has a shield area and is formed on the substrate, a magnetic write head element that has a pole area and is fo... | 11/24/2009 |
| 7609488 | Fly height actuator/void region in basecoat A transducing device responsive to magnetic fields includes a writer, a reader, an actuator, and a void. The actuator is positioned proximate the writer and reader. The void is positioned between at least one of the reader and writer and a substrate of a sensing dev... | 10/27/2009 |
| 7583477 | Magnetic recording head with a point writer pole A magnetic recording head having a write pole formed in a point. The narrow width of the write pole can be manufactured using existing equipment, reduces the number of steps required to build the recording head, and results in a recording head that has other advanta... | 09/01/2009 |
| 7576950 | Perpendicular magnetic recording head utilizing tensile stress to optimize magnetic pole layer domain structure A thin film magnetic head is constructed so that in the case where a magnetic pole layer has a tensile stress, an insulating layer under the magnetic pole layer has a tensile stress and a gap layer on the magnetic pole layer similarly has a tensile stress. The tensi... | 08/18/2009 |
| 7561380 | Transducing head including a magnetic element exhibiting varying permeability A transducing head has a main pole and at least one magnetic element (such as a return pole or a shield) which provides a potential return path for a magnetic field produced by the main pole. The magnetic element is spaced from the main pole. The magnetic element ha... | 07/14/2009 |
| 7551406 | Dual electrical lapping guides with common bonding pad A recording head comprises a write element, including a coil and a dynamic fly-height heater, and two electrical lapping guides. The head also comprises a number of bonding pads including a DFH bonding pad and a shared bonding pad both electrically connected to the ... | 06/23/2009 |
| 7542245 | Composite thin-film magnetic head with non-magnetic conductive layer to balance parasitic capacitances Composite thin-film magnetic head includes a substrate; a first insulation layer on the substrate; an MR read head element on the first insulation layer and provided with a lower shield layer, an upper shield layer and an MR layer with a sense current flowing perpen... | 06/02/2009 |
| 7542244 | Magnetic head to prevent undesired data erasure and magnetic disk storage having the same Embodiments of the invention provide a magnetic head (magnetic disk storage) which does not erase data on a recording medium even when a stray field is applied. In one embodiment, the head has a structure that d1 | 06/02/2009 |
| 7525770 | Thin film magnetic head and method of manufacturing same A thin film magnetic head capable of shortening a manufacturing time and a method of manufacturing the same are provided. After forming a write gap layer by using a non-magnetic conductive material such as copper, a top pole is formed on the write gap layer by growi... | 04/28/2009 |
| 7511921 | Read and write heads with at least a portion of the coil positioned about the write pole opposite the read transducer to reduce adjacent track erasure Techniques for reducing adjacent track erasure include: a bucking coil having a lower number of turns than the write coil for bucking out a portion of the field induced by the write coil; a hybrid solenoid coil that includes turns that are in a pancake arrangement a... | 03/31/2009 |
| 7492555 | Thin-film magnetic head structure, method of manufacturing the same, and thin-film magnetic head A method of manufacturing a thin-film magnetic head structure comprises the steps of preparing an insulating layer 10; forming a first resist layer 51 provided with a first slit pattern 51a corresponding to a very narrow groove part and a... | 02/17/2009 |
| 7486485 | Perpendicular hard disk drive resistive against external magnetic field Embodiments of the invention prevent a decrease in magnetization or demagnetization from occurring to recording magnetization regardless of a direction in which a stray field is applied. In one embodiment, an apparatus for data storage system comprises a head having... | 02/03/2009 |
| 7483243 | Magnetic head with recessed portion, and magnetic recording and reproduction apparatus comprising the same Embodiments of the invention provide a magnetic head which prevents data on a recording medium from being erased even when a stray field is applied. In one embodiment, a magnetic head includes a perpendicular write head having a main pole and an auxiliary pole; and ... | 01/27/2009 |
| 7441325 | Perpendicular head with trailing shield and rhodium gap process A perpendicular write head including a main pole and a trailing shield, the main pole being made of a diamond-like carbon (DLC) layer as hard mask and a rhodium (Rh) layer as shield gap, both DLC and Rh layers being CMP stop layers so as to avoid corner rounding and... | 10/28/2008 |
| 7440238 | Thin film magnetic head, method of manufacturing the same, and magnetic recording apparatus The present invention provides a thin film magnetic head capable of satisfying both assurance of recording performance and assurance of reproduction performance. In the case where a lower magnetic layer is formed of an iron cobalt alloy (for example, Fe65... | 10/21/2008 |
| 7440237 | Thin film magnetic head, head gimbal assembly, and hard disk drive In a thin film magnetic head of the present invention, lead formation patterns of a first lead for connection between a lower shield layer and a first extraction electrode portion and a second lead for connection between an upper shield layer and a second extraction... | 10/21/2008 |
| 7436633 | Thin-film magnetic head, head gimbal assembly and hard disk system A parasitic capacity C4 generated between a slider substrate and the first shield layer with the first insulating layer as a capacity layer is made substantially equal to a parasitic capacity C2 occurring between a lower magnetic layer and the second s... | 10/14/2008 |
| 7418778 | Method for producing a CPP thin-film magnetic head A CPP thin-film magnetic head includes a bottom shield layer; a top shield layer, the bottom shield layer and the top shield layer being disposed at a predetermined interval; a thin-film magnetic head element between the bottom shield layer and the top shield layer;... | 09/02/2008 |
| 7400474 | Conductive pairing for piggyback magnetic head A magnetic tape head having an array of reader/writer pairs formed on a common substrate, each reader/writer pair being configured in a piggyback configuration such that the writer and reader of each pair are aligned in a direction parallel to a relative direction o... | 07/15/2008 |
| 7398591 | Manufacturing method of a thin-film magnetic head The present invention relates to a manufacturing method of a thin-film magnetic head whereby re-deposition and an overlapped part in a region of a magnetoresistive effect multi-layered structure opposite to an air bearing surface can be removed and also a width of a... | 07/15/2008 |
| 7398592 | Manufacturable CMP assisted liftoff process to fabricate write pole for perpendicular recording heads This invention describes a manufacturable method, including a CMP liftoff process, for removing masking materials after ion milling for fabricating the write pole of a magnetic head. Significant parameters for the CMP assisted liftoff process include the thickness o... | 07/15/2008 |
| 7400473 | Slider with independent fly-height adjustment of reader and writer A disk drive includes a rotatable storage disk, a suspension, and a slider assembly. The slider assembly includes a slider body, a first slider deformer and a second slider deformer. Activation of the first slider deformer deforms the slider body, and activation of ... | 07/15/2008 |
| 7397625 | Large protrusion recording head for controlled magnetic spacing recording/reading A magnetic head structure having enhanced protrusion and having a first pole structure, a second pole structure forming a yoke with the fist pole, a coil structure disposed in the yoke, and a layer of partially cured polymer operatively coupled to the yoke. Also dis... | 07/08/2008 |
| 7397634 | Magnetic head coil system and damascene/reactive ion etching method for manufacturing the same A system and method are provided for manufacturing a coil structure for a magnetic head. Initially, an insulating layer is deposited with a photoresist layer deposited on the insulating layer. Moreover, a silicon dielectric layer is deposited on the photoresist laye... | 07/08/2008 |
| 7395595 | Method for manufacturing P3 layer of a perpendicular magnetic write head A method for forming a P3 layer with NiFe and alumina mask using resist shrink process for use in perpendicular magnetic write heads. The method includes forming a laminated layer, forming an alumina layer on top of the laminated layer, depositing a conductiv... | 07/08/2008 |
| 7394619 | Disk drive write head for writing cross-track magnetizations An inductive write head has its write poles and write gap oriented to generate magnetic fields in the cross-track direction on a magnetic recording disk in a disk drive. The disk has the magnetizations in the concentric data tracks oriented in the cross-track direct... | 07/01/2008 |
| 7392579 | Method for protecting a slider mounted CPP GMR or TMR read head sensor from noise and ESD damage A slider mounted CPP GMR or TMR read head sensor is protected from electrostatic discharge (ESD) damage and from noise and cross-talk from an adjacent write head by means of a balanced resistive/capacitative shunt. The shunt includes highly resistive interconnection... | 07/01/2008 |
| 7389578 | Manufacturing method of a perpendicular recording magnetic head Embodiments in accordance with the present invention relate to methods wherein when a main pole is processed by using an ion milling technique, a re-adhesion layer created on the side face of the resist mask is removed with certainty. In one embodiment, an inorganic... | 06/24/2008 |
| 7386933 | Method of fabricating thin film write heads with a shortened yoke and improved dimension control A method for fabricating a magnetic recording head writer. 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 includin... | 06/17/2008 |
| 7386934 | Double layer patterning and technique for milling patterns for a servo recording head Double photolithography is used to produce an under-layer of protective and filtering photoresist over a substrate that will have channels milled with a FIB. Secondary layers are applied with precision on top of the first layer in order to define the precise pattern... | 06/17/2008 |
| 7382575 | Transducing head including a magnetic element exhibiting varying permeability A transducing head has a main pole and at least one magnetic element (such as a return pole or a shield) which provides a potential return path for a magnetic field produced by the main pole. The magnetic element is spaced from the main pole. The magnetic element ha... | 06/03/2008 |
