| Patent Number |
Title Of Patent |
Date Issued |
| 7554767 |
Electrical lapping guide disposed laterally relative to a shield pedestal |
June 30, 2009 |
| Methods are provided for fabricating an electrical lapping guide, and for using the electrical lapping guide to fabricate a transducer of a magnetic recording head. Additionally, transducers comprising an electrical lapping guide are also provided. Methods of fabricating the electric |
| 7522377 |
Magnetic write head with high moment magnetic thin film formed over seed layer |
April 21, 2009 |
| A magnetic write head includes a seed layer and a magnetic layer on the seed layer. The seed layer includes seed-layer grains having either a face-centered cubic (fcc) crystalline structure with a surface plane substantially oriented in a [111] direction or a hexagonal-close-packed ( |
| 7493688 |
Method of manufacturing a magnetic recording transducer |
February 24, 2009 |
| A method for providing a magnetic recording transducer is disclosed. The method includes providing a first pole having front and rear portions and a back gap on the rear portion. The method also includes providing an insulator on the first pole. The method includes providing a write gap |
| 7466523 |
Nanotube spin valve and method of producing the same |
December 16, 2008 |
| Present invention discloses novel designs of carbon nanotube spin valve structures for incorporation into magnetic storage and magnetic sensing devices, such as magnetic read head, MRAM, and magnetic field sensor. One of the designs is an in-stack carbon nanotube spin valve, which consis |
| 7444740 |
Damascene process for fabricating poles in recording heads |
November 4, 2008 |
| A method and system for manufacturing a pole for a magnetic recording head. The method and system include providing an insulator and fabricating at least one hard mask on the insulator. The at least one hard mask has an aperture therein. The method and system also include removing a |
| 7419891 |
Method and system for providing a smaller critical dimension magnetic element utilizing a single |
September 2, 2008 |
| The method and system for providing a magnetic element are disclosed. The method and system include providing a magnetic element stack that includes a plurality of layers and depositing a stop layer on the magnetic element stack. The method and system also include providing a dielect |
| 7375926 |
Inductive writer design using a soft magnetic pedestal having a high magnetic saturation layer |
May 20, 2008 |
| A magnetic head for writing information on a relatively-moving medium includes a first substantially flat soft magnetic pole layer and a second substantially flat pole layer with at least one coil layer between them. The pole layers are magnetically coupled in a core region and spaced by |
| 7354664 |
Magnetically soft, high saturation magnetization laminate of iron-cobalt-nitrogen and iron-nicke |
April 8, 2008 |
| A magnetic disk has a soft magnetic underlayer comprising a first layer containing NiFe having a concentration of iron that is at least thirty percent and not more than seventy percent; a second layer that adjoins the first layer and contains FeCoN having a concentration of iron that is |
| 7342752 |
Magnetoresistive read head having a bias structure with at least one dusting layer |
March 11, 2008 |
| A magnetoresistive read head includes a magnetoresistive sensor and a bias structure adjacent to the magnetoresistive sensor. The bias structure provides a magnetostatic bias field for the magnetoresistive sensor. The bias structure includes an underlayer, a bias layer over the underlaye |
| 7310204 |
Inductive writer design for using a soft magnetic pedestal having a high magnetic saturation lay |
December 18, 2007 |
| A magnetic head for writing information on a relatively-moving medium has a pair of substantially flat soft magnetic pole layers separated by a pair of coil layers. A soft magnetic pedestal adjoins the leading pole layer adjacent to a medium-facing surface and is spaced from the second |
| 7296339 |
Method for manufacturing a perpendicular magnetic recording head |
November 20, 2007 |
| A method and system for manufacturing a perpendicular magnetic recording head is disclosed. The method and system include providing a chemical mechanical planarization (CMP) uniformity structure having an aperture therein and forming a perpendicular magnetic recording pole within the |
| 7289303 |
Spin valve sensors having synthetic antiferromagnet for longitudinal bias |
October 30, 2007 |
| Magnetoresistive (MR) sensors are disclosed having mechanisms for reducing edge effects such as Barkhausen noise. The sensors include a pinned layer and a free layer with an exchange coupling layer adjoining the free layer, and a ferromagnetic layer having a fixed magnetic moment adjoini |
| 7286329 |
GMR sensor with shallow contiguous junction and bias layers aligned with free sensor layers |
October 23, 2007 |
| A magnetic sensor is disclosed having a shallow contiguous junction. Such a sensor is can greatly increase yield for mass-produced heads, especially for large wafers. The magnetic bias layers can be aligned with a free layer of the sensor, improving performance. Milling may be termin |
| 7248432 |
Inductive writer design for using a soft magnetic pedestal having a high magnetic saturation lay |
July 24, 2007 |
| A magnetic head for writing information on a relatively-moving medium has a pair of substantially flat soft magnetic pole layers separated by a pair of coil layers. A soft magnetic pedestal adjoins the leading pole layer adjacent to a medium-facing surface and is spaced from the second |
| 7177117 |
Magnetically soft, high saturation magnetization laminates of iron-cobalt-nitrogen and iron-nick |
February 13, 2007 |
| A magnetic head comprising a first layer containing NiFe having a concentration of iron that is at least thirty percent and not more than seventy percent; a second layer that adjoins the first layer and contains FeCoN having a concentration of iron that is greater than the second lay |
| 7113366 |
Double-nosed inductive transducer with reduced off-track writing |
September 26, 2006 |
| A thin film electromagnetic head has an inductive transducer with a double-nosed ferromagnetic trailing pole layer. The trailing pole layer has a trailing pole tip disposed adjacent to a media-facing surface, a trailing pole yoke disposed distal to the media-facing surface, and a tra |
| 7063753 |
Electronic device utilizing magnetic nanotubes |
June 20, 2006 |
| Present invention provides enabling techniques of integrating novel nanotube elements into semiconductor devices, particularly in transistors, as gate channels or/and as interconnects. This is done in a series of process steps, which consist of fabricating magnetic-core-containing na |
| 7027274 |
Spin-dependent tunneling read/write sensor for hard disk drives |
April 11, 2006 |
| A hard biased spin-dependent tunneling sensor and manufacturing method therefor is provided having a substrate with a first lead formed thereon. A hard magnet is formed over the first lead and a free layer is formed over the hard magnet. A tunneling barrier layer with a first pinned laye |
| 7007372 |
Method for making high speed, high areal density inductive write structure |
March 7, 2006 |
| 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 |
| 6987302 |
Nanotube with at least a magnetic nanoparticle attached to the nanotube's exterior sidewall and |
January 17, 2006 |
| Present invention provides enabling methods of integrating novel nanotube elements into semiconductor devices, such as transistor containing electronic device. This is done in a series of process steps, which consist of attaching magnetic nanoparticles to nanotubes, tailoring magneti |
| 6975486 |
Thin film write head having a laminated, flat top pole with bottom shaper and method of fabricat |
December 13, 2005 |
| A writer for high frequency, data storage heads. The writer includes a first magnetic pole upon which a write gap pedestal is formed with an upper pedestal layer of high moment material with a planar upper surface. An electrical coil is formed on the first magnetic pole. A write gap laye |
| 6958885 |
Insulation layer structure for inductive write heads and method of fabrication |
October 25, 2005 |
| A computer disk drive (22) having a write head (52) which includes a coil (38), a photoresist insulation layer (66) formed on the coil (38), and an insulation shell layer (102) which is formed on the photoresist insulation layer (66). In the first preferred embodiment (100), the top pole |
| 6943993 |
Magnetic recording head with a side shield structure for controlling side reading of thin film r |
September 13, 2005 |
| Side shield structures magnetically shielding a read sensor to block side reading of tracks on a magnetic media. The read heads include bottom and top magnetic shield layers, a read sensor or magnetically sensitive element between the bottom and top magnetic shield layers, and a side |
| 6940688 |
Coil inductive writer having a low inductance and short yoke length |
September 6, 2005 |
| A method and system for providing a thin film recording head are disclosed. The method and system include providing a first pole, providing a second pole and providing a write gap separating the first pole from the second pole. The method and system further include providing at least one |
| 6934113 |
Method and system for providing dynamic actuation of a write head using a strain element |
August 23, 2005 |
| A method and system for actuating a pole tip of a write head is disclosed. The write head includes a first pole and a second pole. The method and system include providing a strain element and providing a coil. The strain element is electrically insulated from the first pole and the secon |
| 6912106 |
Writer with a hot seed zero throat and substantially flat top pole |
June 28, 2005 |
| A method and system for providing a recording head is disclosed. The method and system include providing a first pole, a second pole, a write gap and at least one coil. The write cap separates the first pole from the second pole. The coil(s) include a plurality of turns and is between th |
| 6906894 |
Write head having a recessed, magnetic adjunct pole formed atop a main pole, and method of makin |
June 14, 2005 |
| A read/write head and method of making the same are used in a data storage system, such as a disk drive, for perpendicular magnetic recording of data. The head employs a two-layer pole design with a main pole made of sputtered high moment magnetic material, and an adjunct pole made of |
| 6873494 |
Write head with high moment film layer having tapered portion extending beyond write gap layer |
March 29, 2005 |
| An inductive write head structure incorporating a high moment film in conjunction with at least one pole (e.g., the bottom pole) for use with magnetic storage media and a process for producing the same in which a lift-off photoresist mask is used prior to the deposition of the high m |
| 6870712 |
Inductive writer with flat top pole and pedestal defined zero throat |
March 22, 2005 |
| A disk drive write head (10) having a bottom pole (60), a first insulation layer (64) formed on the bottom pole (60), a coil (38) formed on the first insulation layer (64), a second insulation layer (66) formed on the coil (38), a write gap layer (76) formed on the second insulation laye |
| 6809899 |
Magnetic heads for perpendicular recording with trapezoidal pole tips |
October 26, 2004 |
| Electromagnetic transducers are disclosed having write poles with a leading edge that is smaller than a trailing edge, which can reduce erroneous writing for perpendicular recording systems. The write poles may have a trapezoidal shape when viewed from a direction of an associated medium |
| 6801408 |
Data storage and retrieval apparatus with thin film read head having a planar sensor element and |
October 5, 2004 |
| In at least one embodiment, the apparatus of the invention is a read sensor which includes a shield, a sensor element, a read gap positioned between the shield and the sensor element, and an extra gap positioned between the shield and the sensor element and adjacent the read gap. The sen |
| 6791793 |
Perpendicular recording write head having a recessed magnetic adjunct pole and method of making |
September 14, 2004 |
| A read/write head and method of making the same, are used in a data storage system, such as a disk drive, for perpendicular magnetic recording of data. The head employs a two-layer pole design with a main pole made of sputtered high moment magnetic material, and an adjunct pole made of |
| 6785955 |
Method for providing pedestal-defined zero throat writer |
September 7, 2004 |
| A method and system for providing a writer is disclosed. The method and system include providing a first pole, an insulator covering a portion of the first pole and a coil on the first insulator. The coil includes a plurality of turns. The method and system also include providing a secon |
| 6778358 |
Magnetically soft, high saturation magnetization laminates of iron-cobalt-nitrogen and iron-nick |
August 17, 2004 |
| In one aspect, a laminated structure including a first plurality of layers containing primarily-iron FeCoN interleaved with a second plurality of layers containing primarily iron FeNi is disclosed. The structure has an easy axis of magnetization and a hard axis of magnetization, has a |
| 6737281 |
Method of making transducer with inorganic nonferromagnetic apex region |
May 18, 2004 |
| 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 inorganic nonferr |
| 6724572 |
Inductive transducer with recessed leading pole layer |
April 20, 2004 |
| In one aspect, an inductive transducer is disclosed having a leading pole layer and a leading pole tip, with the pole layer being further removed than the pole tip from a media-facing surface. In another aspect, an inductive transducer is disclosed having a magnetic pedestal disposed |
| 6724569 |
Thin film writer with multiplayer write gap |
April 20, 2004 |
| Embodiments in accordance with the thin film write head of the present invention have a lower pole structure, an upper pole structure, and a multilayer write gap extending from an air bearing surface between the upper and lower pole structures. In preferred embodiments, the write gap |
| 6721138 |
Inductive transducer with stitched pole tip and pedestal defining zero throat height |
April 13, 2004 |
| An inductive transducer having first and second magnetic pedestals disposed between first and second magnetic pole layers and adjacent to a media-facing surface, the pedestals separated by a submicron, nonmagnetic gap. The first pedestal extends less than the second pedestal from the |
| 6700738 |
Read/write head coil tap having upper and lower portions |
March 2, 2004 |
| A thin film read/write head with a high performance inductive write section that incorporates a single layer coil with an improved fabrication method of a center tab of the single layer coil. The center tab is formed before the main body of the single layer coil is formed. Several advant |
| 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 |
| 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 |
| 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 |
| 6410170 |
High resistivity FeXN sputtered films for magnetic storage devices and method of fabrication |
June 25, 2002 |
| A preferred method of the present invention provides an improved thin film for carrying magnetic flux. With the preferred method, the magnetic thin film may be formed by depositing Fe by reactive sputtering using N.sub.2 to form a thin film comprising .alpha.-Fe and .gamma.-Fe.sub.4 N. W |
| 6353511 |
Thin film write head for improved high speed and high density recording |
March 5, 2002 |
| A preferred embodiment provides a thin film write head having upper and lower pole structures each having pedestal pole tips formed with CoNiFe. The pedestal pole tips may have from about 60% to about 70% Co and from about 10% to about 15% Ni. The upper pole structure of the preferred |
| 6353318 |
Magnetoresistive sensor having hard biased current perpendicular to the plane sensor |
March 5, 2002 |
| The apparatus of the present invention is embodied in a magnetic field sensor having a magnetoresistive element, a magnetic bias layer for biasing the magnetoresistive element with a magnetic field, and an electrical insulator positioned between the magnetic bias layer and the magnet |
| 6233116 |
Thin film write head with improved laminated flux carrying structure and method of fabrication |
May 15, 2001 |
| The present invention provides a thin film write head having an improved laminated flux carrying structure and method of fabrication. The preferred embodiment provides laminated layers of: high moment magnetic material, and easily aligned high resistivity magnetic material. In the prefer |
| 6185081 |
Bias layers which are formed on underlayers promoting in-plane alignment of the c-axis of cobalt |
February 6, 2001 |
| Bias layers for a magnetoresistive (MR) sensor have an in-plane easy axis of magnetization for providing a longitudinal bias to MR layers. The bias layers include cobalt (Co), and are formed on various underlayers having crystalline structures that encourage an in-plane alignment of the |
