Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Read Rite Corporation Patents
Assignee:
Read Rite Corporation
Address:
Fremont, CA
No. of patents:
288
Patents:


1 2 3 4 5 6










Patent Number Title Of Patent Date Issued
6873547 High capacity MRAM memory array architecture March 29, 2005
A magnetic memory is disclosed. The magnetic memory includes a first magnetic tunneling junction and a reference magnetic tunneling junction. The first magnetic tunneling junction includes a first ferromagnetic layer, a second ferromagnetic layer and a first insulating layer between
6650503 Inductive write head including a thin high moment pedestal having a tapered edge November 18, 2003
An inductive write element for use with a magnetic data recording and retrieval system is provided. The write element includes a magnetic yoke having an electrically conductive coil passing there through. The yoke is constructed of first and second magnetic poles, and performance of the
6633464 Synthetic antiferromagnetic pinned layer with Fe/FeSi/Fe system October 14, 2003
A magnetoresistive (MR) device includes a synthetic antiferromagnetic (AFM) layer having an Fe/FeSi/Fe construction. A first Fe layer of the synthetic AFM layer has a magnetization substantially in a first direction, while a second Fe layer of the synthetic AFM layer has a magnetization
6618223 High speed, high areal density inductive writer September 9, 2003
An inductive write element is disclosed for use in a magnetic data recording system. The write element provides increased data rate and data density capabilities through improved magnetic flux flow through the element. The write element includes a magnetic yoke constructed of first a
6583961 Air bearing facilitating load/unload of a magnetic read/write head June 24, 2003
An air bearing surface for use on a magnetic read/write head. The air bearing surface provides a stable flight profile while exhibiting exception load/unload characteristics through the use of a plurality of pads providing high pressure areas as well as a central cavity providing a s
6577470 Method and system for providing a tape head subassembly structure having an integrated wear bar June 10, 2003
A method and system for providing a tape head subassembly is disclosed. The method and system include providing a device, a left head block segment and a right head block segment. The device is for writing to a media. The left head block segment includes an integrated outrigger rail and
6552928 Read-write control circuit for magnetic tunnel junction MRAM April 22, 2003
An MRAM data storage device has at least one digit line, at least one bit line, and at least one MRAM cell disposed proximate to a digit line and electrically connected to a bit line. Each end of each digit line is connected to a write current source and a write current sink. One end of
6552874 Shared pole magnetic read-write head for achieving optimized erase band width and method of fabr April 22, 2003
The present invention provides a shared pole magnetic read/write head for achieving optimized erase band width and a method for fabricating same. It has been found that there exists a relationship between a quantity delta defined as the difference between the width of the first pole and
6538850 Low profile head gimbal assembly with shock limiting and load/unload capability and method of ma March 25, 2003
In one embodiment the apparatus is a head gimbal assembly for use in a disk drive having a load/unload ramp, and includes a load beam having a pivot point, a flexure/slider assembly having a flexure and a slider, at least one limiter mounted between the flexure/slider assembly and the lo
6532823 Insulator layers for magnetoresistive transducers March 18, 2003
A magnetoresistive (MR) transducer has at least one insulative layer made of tetrahedral amorphous carbon (ta-C). The ta-C layer is formed by filtered cathodic arc deposition, has an essentially zero concentration of hydrogen and can serve as a read gap for the transducer. The hydrogen-f
6515791 Active reflection and anti-reflection optical switch February 4, 2003
An active, optical, piezoelectric actuated modulator allows switching between a reflecting state and an anti-reflecting state. The modulator, or switch, is based on the precise controlling of an air gap between a thin film membrane and a substrate. The thin film membrane is deformed by a
6515573 Method and system for providing edge-junction TMR utilizing a hard magnet as a pinned layer February 4, 2003
A method and system for providing a magnetoresistive sensor for reading data from a recording media is disclosed. The method and system include providing at least one barrier layer and a free layer having at least one edge. The at least one edge of the free layer is adjacent to the at le
6512690 High sensitivity common source amplifier MRAM cell, memory array and read/write scheme January 28, 2003
In the present invention, a magnetic random access memory (MRAM) cell includes a magnetic tunnel junction (MTJ) and a transistor. This memory cell provides a boosted output signal between different MTJ states stored. A method that is used by MRAM array for providing larger output voltage
6512661 Vertical giant magnetoresistance sensor utilizing an insulating bias layer January 28, 2003
A method and system for providing a magnetoresistive head that reads data from a recording media is disclosed. The method and system include providing a first shield, a second shield, a magnetoresistive sensor, at least one insulating bias layer and a lead. The first shield has a first
6512659 Disk drive actuator arm with microactuated read/write head positioning January 28, 2003
The present invention is embodied in an actuator arm which is mounted to a primary actuator. The primary actuator positions the actuator arm, with a read/write head mounted to the actuator arm, across a data storage disk. The actuator arm comprises an inboard portion, an outboard portion
6512657 Head suspension having gram load change reduction and method of assembly January 28, 2003
A suspension assembly for a magnetic head reduces isolation forces caused by swaging the suspension to an actuator arm of a disk drive. The suspension is formed with a first end, and a second end having an inner periphery which defines an opening. Tabs extend from the inner periphery
6504676 Magnetic head with low stack height and self-aligned pole tips January 7, 2003
A magnetic head includes pole tips with aligned sidewalls and a low head profile. The aligned sidewalls are formed by depositing a stack of pole tip layers on a substrate. The stack of layers are etched through a common overlying mask. The stack of layers is covered over and around with
6496330 Magnetic write head having a splitcoil structure December 17, 2002
A magnetoresistive head having a split coil structure including multiple, similar coil layers separated by an insulator and joined at their ends to define parallel electrical paths. The coil passes through a magnetic yoke having an open end and a closed end and is electrically insulated
6490125 Thin film write head with improved yoke to pole stitch December 3, 2002
The present invention provides an write head having an improved upper pole tip-to-yoke stitch. The upper pole tip is formed having an open faced sloping surface at an end of the pole tip distal from an air bearing surface. Preferably the angle of the sloping surface is about 30 degrees.
6487056 Thin film read head structure with improved bias magnet-to-magnetoresistive element interface an November 26, 2002
The present invention provides an improved bias magnet-to-magnetoresistive element interface and method of fabrication. In a preferred embodiment, the wall/walls of an MR element opposing a bias layer are formed by over etching to provide vertical side walls without taper. In the preferr
6487040 Thin film magnetic head with self-aligned pole tips November 26, 2002
A magnetic head includes first and second pole tips separated by a nonmagnetic gap layer. The right side walls of the first and second pole tips are vertically aligned. Similarly, the left side walls of the first and second pole tips are vertically aligned. The side fringing flux is
6483662 High density multi-coil magnetic write head having a reduced yoke length and short flux rise tim November 19, 2002
A magnetoresistive write element has a plurality of coils disposed between a first and second pole. A first coil having inner and outer contacts is provided on top of a layer of insulation on top of the first pole. A write gap material above the first coil separates the poles at a yoke t
6479096 Method for manufacturing a GMR spin valve having a smooth interface between magnetic and non-mag November 12, 2002
A GMR spin valve is provided for reading a magnetic signal from a magnetic recording medium. The spin valve includes a non-magnetic layer such as for example copper, separated by first and second magnetic layers. The spin valve includes a pinned magnetic layer and a free magnetic layer,
6469877 Spin valve device with improved exchange layer defined track width and method of fabrication October 22, 2002
The present invention provides an exchange break to define the track width of a read head by selectively isolating an exchange coupling layer from an underlying ferromagnetic layer. In the preferred embodiment, the exchange break is provided over a portion of the free layer of a spin val
6468436 Method and system for providing a magnetoresistive head having higher efficiency October 22, 2002
A system and method for providing a head for reading data is disclosed. The method and system include providing a magnetoresistive element and providing a flux guide having a high resistivity. The magnetoresistive element has an end. The flux guide also has an end. The end of the flux
6466404 Magnetic read/write device with insulated coil layer recessed into pole October 15, 2002
A write element for recording data on a magnetic medium includes a first pole and a second pole separated by a non-magnetic, electrically insulating write gap layer. In addition, a coil layer is recessed into the first pole and is electrically insulated from the first pole by a coil
6466402 Compact MR write structure October 15, 2002
A compact write element for magnetically recording data on a magnetic medium and methods for making the same. The write element includes a conductive shield layer, an insulating write gap layer, a pole pedestal, a coil, and a conductive pole layer, with some embodiments further including
6466401 Thin film write head with interlaced coil winding and method of fabrication October 15, 2002
The preferred embodiment of the present invention provides a write head having an interlaced conductor coil winding and method of fabrication. The interlaced winding of the present invention may have alternating turns of a first and a second coil. In the preferred embodiment, the side wa
6462920 Method and system for reducing MR head instability October 8, 2002
A system and method for providing a magnetoresistive head is disclosed. The method and system include providing a first gap and providing a seed layer. The seed layer is disposed above the first gap and has a space therein. The method and system further include providing a magnetores
6456465 Vertical giant magnetoresistance sensor using a recessed shield September 24, 2002
A method and system for providing a magnetoresistive head that reads data from a recording media is disclosed. The method and system include providing a first shield, a second shield, a magnetoresistive sensor, and a lead. The first shield has a first end, a central portion and a second
6452765 CoNbTi as high resistivity SAL material for high-density MR September 17, 2002
A soft adjacent layer made from a ternary alloy material and a MR sensor utilizing this soft adjacent layer. The ternary alloy material CoXY includes cobalt (Co), a first transition metal X and a second transition metal Y. In a preferred embodiment, X is niobium (Nb) and Y is titanium
6452742 Thin film write having reduced resistance conductor coil partially recessed within middle coat i September 17, 2002
In a preferred embodiment, a thin film write head having upper and lower pole structures. In the preferred embodiment of the present invention, a middle coat insulation layer is located over a yoke of the lower pole structure and adjacent a pedestal pole tip of the lower pole structure.
6451514 METHOD FOR FORMATION OF UPPER MAGNETIC POLE LAYER OF THIN FILM MAGNETIC HEAD, METHOD OF FORMING September 17, 2002
An apparatus and method for formation of the upper magnetic pole layer of a thin film magnetic head. The presently described method for formation of the upper magnetic pole layer of a thin film magnetic head enables the formation with submicron precision of a resist layer for use in form
6448765 Microscopic tips having stable magnetic moments and disposed on cantilevers for sensing magnetic September 10, 2002
A magnetic force microscope (MFM) needle has a magnetic material with a magnetic moment that is pinned in a preferred direction. The magnetic moment can be of lower than conventional magnitude without risking an undesirable change in the direction of magnetization. The magnetic needle
6447935 Method and system for reducing assymetry in a spin valve having a synthetic pinned layer September 10, 2002
A method and system for providing a spin valve for use in a magnetoresistive head is disclosed. The method and system include providing a synthetic pinned layer, a nonmagnetic spacer layer, and a free layer. The free layer has a first magnetization canted from a first direction by a
6445554 Method and system for providing edge-junction TMR for high areal density magnetic recording September 3, 2002
A method and system for providing a magnetoresistive sensor for reading data from a recording media is disclosed. The method and system include providing a first barrier layer and a second barrier layer and providing a free layer disposed between the first barrier layer and the second ba
6445553 Method and system for fabricating a high density magnetoresistive device September 3, 2002
A system and method for providing a device for reading data is disclosed. The device includes a magnetoresistive element. The method and system include providing a read gap, providing a plurality of leads, and providing an insulator. The read gap covers at least a portion of the magn
6445542 Air bearing slider September 3, 2002
A slider includes an air bearing surface (ABS) including a plurality of separate coplanar pads, a cavity recessed to a certain depth beneath the level of the ABS, and a plurality of steps in which each step is disposed at a level between that of the ABS and that of the cavity. The plural
6445536 Dielectric stencil-defined write head for MR, GMR, and spin valve high density recording heads September 3, 2002
A thin film head apparatus and method for forming such a thin film head. In one approach, the present invention recites forming a cavity in a dielectric layer. Next, a layer of high magnetic field saturation (HBsat) material is sputter-deposited over the dielectric layer such that the
6437945 Airflow assisted ramp loading and unloading of sliders in hard disk drives August 20, 2002
Windage proximate to a spinning disk within a disk drive is directed through a plurality of apertures in a ramp situated near the outside diameter of the disk. A tab extending from a load beam that supports a slider rests on the ramp when the drive is not in use. When the drive is st
6433970 Structure and method for redeposition free thin film CPP read sensor fabrication August 13, 2002
The present invention provides an improved current perpendicular to the plane thin film read head device and method of fabrication. With the present invention, the lower lead is formed to inhibit accumulation of redeposited lead material on CPP sensor element side walls during CPP se
6433968 Merged read/write head and method of fabricating same August 13, 2002
A merged thin film read/write head having a read element having a first shield layer, a second shield layer and a magnetoresistive element disposed between the first and second shield layers, a thin spacer layer of nonmagnetic material formed upon the second shield layer and an induc
6433965 Laminated carbon-containing overcoats for information storage system transducers August 13, 2002
Plural carbon-containing overcoats are formed on a media-facing surface of an information storage system head. The plural carbon-containing overcoats can mitigate corrosion without increasing head-media spacing. A first of the overcoats may be formed prior to creation of contact or air b
6430806 Method for manufacturing an inductive write element employing bi-layer photoresist to define a t August 13, 2002
An inductive write element for use with a magnetic data recording and retrieval system is provided. The write element includes a magnetic yoke having an electrically conductive coil passing there through. The yoke is constructed of first and second magnetic poles, and performance of the
6424507 Spin valve magnetoresistive sensor for high temperature environment using iridium manganese July 23, 2002
A magnetoresistive read sensor fabricated on a substrate includes a ferromagnetic layer that is exchange coupled with an antiferromagnetic layer made of a defined composition of iridium manganese. A tantalum layer is used so that the exchange field and coercivity do not change with v
6424505 Method and system for providing electrostatic discharge protection for flex-on suspension, trace July 23, 2002
A method and system for protecting a suspension assembly, such as a flex-on-suspension or trace suspension assembly, is disclosed. The suspension assembly is for use with a magnetoresistive (MR) head including an MR sensor. The MR sensor has a first end and a second end. The method a
6421212 Thin film read head structure with improved bias magnet-to-magnetoresistive element interface an July 16, 2002
The present invention provides an improved bias magnet-to-magnetoresistive element interface and method of fabrication. In a preferred embodiment, the wall/walls of an MR element opposing a bias layer are formed by over etching to provide vertical side walls without taper. In the preferr
6421211 Disk drive actuator arm with microactuated read/write head positioning July 16, 2002
The present invention is embodied in an actuator arm which is mounted to a primary actuator. The primary actuator positions the actuator arm, with a read/write head mounted to the actuator arm, across a data storage disk. The actuator arm comprises an inboard portion, an outboard portion
6418048 Spin-dependent tunneling sensor suitable for a magnetic memory July 9, 2002
A method and system for providing a top pinned spin-dependent tunneling sensor is disclosed. The method and system include providing a free layer, a tunneling barrier, a synthetic pinned layer and an antiferromagnetic layer. The free layer is ferromagnetic. The tunneling barrier is an
6418000 Dual, synthetic spin valve sensor using current pinning July 9, 2002
A dual symmetric spin valve sensor consists of outer ferromagnetic pinned layers which are pinned by a current induced magnetic field. One of the outer pinned layers is magnetically coupled to an inner pinned layer which is pinned so that the magnetization of the other outer and the inne
1 2 3 4 5 6

 
 
  Recently Added Patents
Baseball themed hand clap maraca
Thermoforming sheet loading apparatus and method
Method and system for checking citations
Motor control system, motor control device, and brushless motor
Methods circuits apparatuses and systems for facilitating access to online content
System, method, and software for researching, analyzing and comparing expert witnesses
Protein kinase C inhibitors and uses thereof
  Randomly Featured Patents
Radiochromic leuko dye real time dosimeter, one way optical waveguide
Process of bleaching
MOCVD of TiO2 thin film for use as FeRAM H2 passivation layer
Control panels for onboard instruments
Iso- or terephthalic acid production in and recovery from benzoic acid-water solvent system
Shower curtain and fabric display hanger
Torque detection device
Polyvinyl blocking layer for preventing charge injection in a thermoplastic photoconductive device for holography
Polymers of hexafluoropropene oxide and process of making
Tip-in knock eliminating spark timing control