| Patent Number |
Title Of Patent |
Date Issued |
| RE40203 |
Magnetic head suspension assembly fabricated with integral load beam and flexure |
April 1, 2008 |
| A magnetic head suspension assembly is fabricated with an integral piece which includes a load beam section, a flexure section, a rear mount section and a leaf spring section between the load beam and rear mount. A tongue extends from the load beam to the flexure and has a down-facing |
| RE39478 |
Magnetic head suspension assembly fabricated with integral load beam and flexure |
January 23, 2007 |
| A magnetic head suspension assembly is fabricated with an integral piece which includes a load beam section, a flexure section, a rest mount section and a leaf spring section between the load beam and rear mount. A tongue extends from the load beam to the flexure and has a down-facing |
| 7616405 |
Slider with an air bearing surface having a inter-cavity dam with OD and ID dam surfaces of diff |
November 10, 2009 |
| A head for use in a magnetic hard disk drive or other information storage device includes a novel ABS. The novel ABS includes an inter-cavity dam that is disposed between at least a portion of a cavity and a trailing pad. The inter-cavity dam is spaced longitudinally from the trailing pa |
| 7595967 |
Method for fabricating a spacer layer for a magnetoresistive element |
September 29, 2009 |
| A method and system for manufacturing a spacer layer in a magnetoresistive element are described. The spacer layer resides between a free layer and a pinned layer. The method and system include providing a first metallic layer and oxidizing the first metallic layer in a first environment |
| 7593190 |
Flexure design and assembly process for attachment of slider using solder and laser reflow |
September 22, 2009 |
| A head gimbal assembly includes a slider, a flexure, and a plurality of solder receptacles. The slider has an air-bearing surface and a metallized backside opposite the air bearing surface. The flexure includes a flexure tongue layer at least partially formed of stainless steel. The |
| 7583466 |
Disk drive determining operating fly height by detecting head disk contact from disk rotation ti |
September 1, 2009 |
| A disk drive is disclosed including a disk having a plurality of tracks, wherein each track comprises a plurality of data sectors and a plurality of servo sectors. The disk drive further comprises a spindle motor for rotating the disk, and a head actuated radially over the disk, wherein |
| 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 |
| 7552523 |
Method for manufacturing a perpendicular magnetic recording transducer |
June 30, 2009 |
| A method and system for manufacturing a perpendicular magnetic recording transducer by a process that includes plating is described. The method and system include forming a chemical mechanical planarization (CMP) uniformity structure around a perpendicular magnetic recording pole. The |
| 7551406 |
Dual electrical lapping guides with common bonding pad |
June 23, 2009 |
| 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 dynamic fly-height |
| 7542246 |
Transducer with pole tip protrusion compensation layer |
June 2, 2009 |
| A transducer for a disk drive head includes a pole tip protrusion (PTP) compensation layer disposed proximate to a write element of the head to at least partially offset the effect of pole tip protrusion. The PTP compensation layer can be above, below, or within the write element. Su |
| 7522382 |
Head stack assembly with interleaved flexure tail bond pad rows |
April 21, 2009 |
| Flexure tails are provided for coupling heads of head gimbal assemblies to a flex cable in a disk drive. An exemplary flexure tail comprises a substrate including a non-straight edge defining a protruding portion and a recessed portion. The recessed portion includes a first number of |
| 7522379 |
Write element with recessed pole and heat sink layer for ultra-high density writing |
April 21, 2009 |
| A head including a write element for writing data to a magnetic media, and methods for its production are provided. A write element of the invention includes one or more of a recessed first pole, a heat sink layer, and a shortened yoke length. A method of the invention provides forming a |
| 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 ( |
| 7508627 |
Method and system for providing perpendicular magnetic recording transducers |
March 24, 2009 |
| A method and system for providing a magnetic recording transducer are disclosed. The method and system include providing a metallic underlayer directly on a portion of an insulating layer. The method and system also include forming a perpendicular magnetic recording pole on the metallic |
| 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 |
| 7477486 |
Air bearing slider with a side pad having a shallow recess depth |
January 13, 2009 |
| A head for use in a magnetic hard disk drive or other information storage device includes a novel air bearing surface. The novel air bearing surface includes two leading pads separated by a longitudinal channel, and a trailing pad. The leading pads and trailing pad each include a maj |
| 7474508 |
Head gimbal assembly with air bearing slider crown having reduced temperature sensitivity |
January 6, 2009 |
| A head gimbal assembly includes a slider and novel gimbal that may reduce crown sensitivity to temperature without substantially sacrificing the ability of a bond between the gimbal tongue and slider to resist applied forces and torques. The gimbal has a tongue that includes at least one |
| 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 |
| 7443632 |
Magnetic head with stitched top pole layer and single layer coil or solenoidal coil |
October 28, 2008 |
| A magnetic head is disclosed that has first and second substantially flat soft magnetic pole layers that are magnetically coupled together in a backgap region that is removed from the medium-facing surface; a soft magnetic pedestal having a leading edge and a trailing edge, the trailing |
| 7440220 |
Method for defining a touch-down power for head having a flying height actuator |
October 21, 2008 |
| A novel method for defining a touch-down power for a head that has a head-based flying height actuator is disclosed and claimed. A linear relationship between power and spacing is derived by fitting to first and second transducer-disk spacings corresponding to first and second electr |
| 7436638 |
Ferromagnetic pinning structure including a first section antiferromagnetically coupled to a pin |
October 14, 2008 |
| A CPP magnetic sensor is disclosed with a ferromagnetic layer that extends in a first direction a first distance; a nonferromagnetic spacer layer that adjoins the ferromagnetic layer and extends in the first direction a second distance that is substantially equal to the first distance; a |
| 7436631 |
Heated gimbal for magnetic head to disk clearance adjustment |
October 14, 2008 |
| A head gimbal assembly having a suspension and a read/write head is provided. The read write head is attached to a flexure tongue of the suspension. Heating elements on arms of the suspension, set on either side of the suspension tongue, are used to alter flight characteristics of th |
| 7436620 |
Method for selecting an electrical power to be applied to a head-based flying height actuator |
October 14, 2008 |
| A novel method of selecting an electrical power, to be applied to a subject head-based flying height actuator during operation of a disk drive, is disclosed and claimed. A touch-down power for each of a plurality of representative heads is detected. A relationship between back-off po |
| 7430098 |
Perpendicular magnetic recording head with dynamic flying height heating element |
September 30, 2008 |
| A magnetic head includes a slider having an air bearing surface (ABS) and a trailing surface, with a transducer fabricated on the trailing surface. The transducer includes an adjunct pole disposed in a first general plane, the adjunct pole having a front edge that is recessed from the AB |
| 7428124 |
Magnetic recording head with resistive heating element and thermal barrier layer |
September 23, 2008 |
| A thin film magnetic head includes a slider body having a trailing surface meeting an air-bearing surface at a trailing edge. A magnetic read and write elements are disposed along the trailing surface near the trailing edge. The magnetic write element includes write poles and a coil. 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 |
| 7417832 |
Magnetoresistive structure having a novel specular and filter layer combination |
August 26, 2008 |
| A method and system for providing a magnetoresistive structure is disclosed. The magnetoresistive structure includes a pinned layer, a nonmagnetic spacer layer, a free layer, a filter layer, a specular layer, a barrier layer, and a capping layer. The nonmagnetic spacer layer resides |
| 7389577 |
Method to fabricate an ESD resistant tunneling magnetoresistive read transducer |
June 24, 2008 |
| A method to fabricate a tunneling magnetoresistive (TMR) read transducer is disclosed. An insulative layer is deposited on a wafer substrate, and a bottom lead is deposited over the insulative layer. A laminated TMR layer, having a plurality of laminates, is deposited over the bottom |
| 7386933 |
Method of fabricating thin film write heads with a shortened yoke and improved dimension control |
June 17, 2008 |
| 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 including front and back tips |
| 7379269 |
Write element with reduced yoke length for ultra-high density writing |
May 27, 2008 |
| A head including a write element for writing data to a magnetic media, and methods for its production are provided. A write element of the invention includes one or more of a recessed first pole, a heat sink layer, and a shortened yoke length. A method of the invention provides forming a |
| 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 |
| 7372665 |
Magnetic recording head with resistive heating element located near the write coil |
May 13, 2008 |
| A magnetic head includes a slider body having a trailing surface meeting an air-bearing surface at a trailing edge, with a thin-film transducer disposed on the trailing surface of the slider body near the trailing edge. The thin-film transducer includes a coil embedded between first and |
| 7371152 |
Non-uniform subaperture polishing |
May 13, 2008 |
| A method for subaperture polishing includes determining a first portion of a sample to be polished disproportionately compared to a second portion of the sample. Based on the determination of the first portion, a sweep frequency that is a first rate of lateral motion for a polishing pad |
| 7363697 |
Method for manufacturing a group of head gimbal assemblies |
April 29, 2008 |
| A system and method for the production level screening of low flying magnetic heads in the manufacture of disk drive head disk assemblies (HDAs) is disclosed. A test disk is provided and has a plurality of bumps extending from at least one surface thereof. The test disk is rotated to |
| 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 |
| 7349179 |
Write head for improved manufacturability larger write field and reduced adjacent track erasure |
March 25, 2008 |
| A magnetic write head provides a significant write field and minimal adjacent track erasure, and lends itself to improved manufacturability. The write head includes a pedestal throat height that defines a bottom pole, P1, and that is substantially recessed from the air bearing surfac |
| 7349170 |
Method of monitoring operation of a disk drive by analyzing the envelope of a read-back signal i |
March 25, 2008 |
| A method monitors operation of a disk drive. The method includes providing a disk drive which includes a rotating disk and a head having a read transducer in proximity to a surface of the disk and an adjustment mechanism which controllably adjusts an average relative spacing between |
| 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 |
| 7337530 |
Method for manufacturing a shielded pole magnetic head for perpendicular recording |
March 4, 2008 |
| 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, and shield layer |
| 7333295 |
Magnetic recording head with high saturation magnetic flux density CoNiFe thin film composition |
February 19, 2008 |
| A method and system for plating CoNiFe is disclosed. The method and system include providing a plating solution including hydroxymethyl-p-tolylsulfone and plating the CoNiFe film on a substrate in the plating solution. The plating solution is configured to provide a CoNiFe film havin |
| 7318947 |
Method and apparatus for controlling magnetostriction in a spin valve sensor |
January 15, 2008 |
| A method and system for providing a magnetic element are described. The method and system include providing a pinned layer, fabricating a metallic spacer layer and oxidizing a portion of the spacer layer in an environment including at least oxygen and a gas inert with respect to the |
| 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 |
| 7307818 |
Method and system for providing a stable spin filter |
December 11, 2007 |
| A method and system for providing a spin filter is disclosed. The method and system include providing a pinned layer, a free layer, and a conductive nonmagnetic spacer layer between the pinned layer and the free layer. The method and system also include providing a spin filter layer |
| 7307816 |
Flexure design and assembly process for attachment of slider using solder and laser reflow |
December 11, 2007 |
| A slider/suspension design and assembly method include securing a slider to a suspension assembly for use in a magnetic disk drive data recording device. To this end, solder bumps are applied to a metalized backside surface of the slider, and are patterned and flown within a plurality of |
| 7307814 |
Pedestal defined zero throat writer having a recessed pedestal |
December 11, 2007 |
| A method and system for providing a pedestal defined zero throat write head is disclosed. The method and system include providing a first pole having a pedestal, providing a gap and providing a second pole. The first pole has a pedestal. The gap separates the pedestal of the first pole |
| 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 |
| 7292409 |
Magnetic head with thin trailing pedestal layer |
November 6, 2007 |
| A magnetic head for a disk drive is disclosed that has a first soft magnetic pole layer disposed in the head adjacent to a medium-facing surface and extending perpendicular to the medium-facing surface; a second soft magnetic pole layer disposed closer than the first pole layer to th |
| 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 |
| 7289299 |
Air bearing slider with three-projection trailing center pad |
October 30, 2007 |
| A novel air bearing can be used in a magnetic hard disk drive or other information storage device. The novel air bearing includes a central cavity having a bottom surface, a leading pad adjacent to the central cavity, a trailing center pad having a top surface, and two inter-projecti |
| 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 |
