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| Number | Title | Issue Date |
| 8151441 | Method for providing and utilizing an electronic lapping guide in a magnetic recording transducer A method for providing an electronic lapping guide (ELG) for a structure in a magnetic transducer are described. The structure has a front edge and a back edge. The ELG includes a stripe having a top edge and a bottom edge. The method includes calibrating a sheet re... | 04/10/2012 |
| 8082658 | Controlled lapping for an ABS damascene process Methods of lapping rows of recording heads are described after an air bearing surface (ABS) damascene process is performed. The ABS damascene process uses a selective etching process to form voids in the row of recording heads where conductive material forms a featu... | 12/27/2011 |
| 7963023 | Process for accurately machining a magnetic tape head An electrical lapping guide for a magnetic tape head is provided with a resistive transverse stripe with a longitudinal height affixed to a substrate. A pair of leads extend from the stripe with a notch formed therebetween. The notch has a height corresponding to a ... | 06/21/2011 |
| 7930817 | Method of manufacturing a thermally assisted magnetic head A method comprises an opposing step of arranging a light-shielding film 50 having a recessed surface 52 and a pinhole 54 formed within the recessed surface 52 such that an end face 54X of the pinhole 54 of the light-shieldin... | 04/26/2011 |
| 7918013 | System for manufacturing a group of head gimbal assemblies (HGAs) 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 to a prede... | 04/05/2011 |
| 7891080 | Techniques for detecting head-disc contact A method for detecting head-disc contact is disclosed. The method comprises locating a head including a head positioning microactuator and at least one of a read transducer and a write transducer adjacent to a disc such that the head is in communication with the dis... | 02/22/2011 |
| 7861400 | Fabricating a write head with multiple electronic lapping guides Write heads and corresponding methods of fabrication are provided using multiple electronic lapping guides to collect information regarding multiple distances of a write head, such as a throat height and a flare point distance of a write pole. A method of fabricatin... | 01/04/2011 |
| 7703193 | Methods and apparatus for controlling the lapping of a slider based on an amplitude of a readback signal produced from an externally applied magnetic field The lapping of a slider is controlled based on an amplitude of a readback signal which is produced from an externally applied magnetic field. A lapping plate is used to lap a slider which includes at least one magnetic head having a read sensor. During the lapping, ... | 04/27/2010 |
| 7418777 | Method on manufacturing spin valve film A method of manufacturing a spin valve film, produces a large read out signal. After a completion of a film making process for forming a previous film of two films to be formed successively, but before an initiation of a film making process for forming a succeeding ... | 09/02/2008 |
| 7398590 | Applying mechanical shock to a data storage device with an enclosed low-density gas The present invention relates to a method of manufacturing low-density gas-filled disk drives involving test equipment utilized to determine gas leaks occurring in disk drives subjected to shock and vibration events. A disk drive is placed in a sealed container, whi... | 07/15/2008 |
| 7386935 | Methods and apparatus for controlling the lapping of a slider based on an amplitude of a readback signal produced from an externally applied magnetic field The lapping of a slider is controlled based on an amplitude of a readback signal which is produced from an externally applied magnetic field. A lapping plate is used to lap a slider which includes at least one magnetic head having a read sensor. During the lapping, ... | 06/17/2008 |
| 7388385 | Wafer dicing system A wafer is formed with metal traces that extend a distance across the wafer on opposite sides of a saw street. The resistances of the metal traces, which can each be formed from one or more layers of metal, are measured before the saw street is cut. During and after... | 06/17/2008 |
| 7367109 | Method of fabricating magnetic sensors with pinned layers with zero net magnetic moment A method for achieving a nearly zero net magnetic moment of pinned layers in GMR sensors, such as Co—Fe/Ru/Co—Fe, is described. The method determines a thickness of the first pinned layer which will yield the desired net magnetic moment for the pinned layers. A ... | 05/06/2008 |
| 7369361 | Magnetic head and magnetic head substructure including resistor element whose resistance corresponds to the length of the track width defining portion of the pole layer A method of manufacturing magnetic heads comprises the step of: fabricating a magnetic head substructure by forming components of a plurality of magnetic heads on a single substrate, wherein a plurality of rows of pre-head portions that will be the respective magnet... | 05/06/2008 |
| 7363697 | Method for manufacturing a group of head gimbal assemblies 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 ... | 04/29/2008 |
| 7355809 | Disc device, disk formatting method, and disk formatting apparatus A disk device includes a plurality of recording surfaces each of which having a recording area for recording data. An area or a width in a radial direction of an effective area set to be capable of recording the data in the recording area on at least one of the reco... | 04/08/2008 |
| 7330338 | Method for adjusting pitch and roll in a head suspension Apparatus and method for adjusting at least one of a pitch and roll parameter of a gimbal for a head suspension assembly having a pair of members contacting at least one gimbal arm at spaced apart locations and having an additional member contacting the gimbal arm i... | 02/12/2008 |
| 7326102 | Apparatus for lapping thin film magnetic heads A lapping method and apparatus is provided that increases the yield rate in the magnetic head slider manufacturing process. According to the invention, an apparatus for lapping thin film magnetic heads includes a jig block and a lapping plate. The jig block includes... | 02/05/2008 |
| 7317597 | Method and apparatus for testing magnetic head with TMR element A magnetic head testing apparatus having the function of evaluating pin holes in a tunnel barrier layer of a TMR element by a non destructive inspection is disclosed. The testing apparatus comprises a temperature control unit which sets a circumferential temperature... | 01/08/2008 |
| 7317587 | Magnetic disk devices with data recording areas set separately for each device The present invention relates to a magnetic disk device and provides a magnetic disk device in which data recording areas are separately set based on the inner recording boundary or outer recording boundary of the head measured for each magnetic disk device. When th... | 01/08/2008 |
| 7301647 | Method for regulating shape of floatation surface of slider floating above record carrier A method for manufacturing a slider including a head for recording data into and reproducing data from a record carrier, and a floatation surface that floats above the record carrier includes the steps of setting an orthogonal coordinate system having an origin as a... | 11/27/2007 |
| 7299536 | Method for an improved magnetic head arm assembly A system and method for an improved magnetic head arm assembly (HAA), reducing complexity of design and difficulty of manufacture, is disclosed. ... | 11/27/2007 |
| 7287313 | Method for preventing magnetic damage to a GMR head during back-end processing A method is provided for preserving the transverse biasing of a GMR (or MR) read head during back-end processing. In a first preferred embodiment, the method comprises magnetizing the longitudinal biasing layers of the read head in a transverse direction, so that th... | 10/30/2007 |
| 7280324 | Magnetoresistive sensor having improved antiparallel tab free layer biasing A magnetoresistive sensor having improved free layer biasing and track width control. ... | 10/09/2007 |
| 7275302 | Method of forming a disc pack A method of forming a disc pack for use in a disc drive is provided. The method includes forming at least one alignment feature between an inner diameter and an outer diameter of each of a plurality of discs. The at least one alignment feature of a first disc of the... | 10/02/2007 |
| 7271970 | Composite magnetic head arranged so the reproducing elements do not overlap a pole of a recording element 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 ... | 09/18/2007 |
| 7271973 | Flying height compensation for up/down bit error rate trend difference A disk drive that has a plurality of heads coupled to one or more disks. The heads have air bearing surfaces that compensate for a radial crown and a radial camber of an adjacent disk to maintain a flying height at a relatively constant level across the disk surface... | 09/18/2007 |
| 7268966 | System and method for adjusting fly heights in a hard disk drive having multiple heads A method for adjusting fly heights for a plurality of heads of a hard disk drive is disclosed. The method includes measuring respective magnetic and mechanical performance for the plurality of heads and varying the density of an environment within the hard disk driv... | 09/11/2007 |
| 7254884 | Method for fabricating a pole tip in a magnetic transducer using feed-forward and feedback Methods for fabricating pole piece tips for a magnetic transducer are disclosed. The ion-milling operations for trimming P2 and notching P1 are controlled using feed-forward and feedback. The preferred method of the invention includes steps for setting... | 08/14/2007 |
| 7249406 | Method to detect magnetic pole defects in perpendicular recording heads at wafer level The perpendicular magnetic head fabrication and testing method includes the additional fabrication of magnetic pole testing structures in the kerf area of the wafer substrate. Particularly, magnetic interconnect pieces are fabricated in the kerf area to magnetically... | 07/31/2007 |
| 7244169 | In-line contiguous resistive lapping guide for magnetic sensors An in-line lapping guide uses a contiguous resistor in a cavity to separate a lithographically-defined sensor from the in-line lapping guide. As lapping proceeds through the cavity toward the sensor, the resistance across the sensor leads increases to a specific tar... | 07/17/2007 |
| 7209312 | Self-servo-write using ramp-tracks Systems and techniques relating to writing servo information on a machine-readable medium. A technique includes forming servo information using a band of ramp-tracks generated based on a mechanical characteristic of a storage device. This can involve writing the ban... | 04/24/2007 |
| 7205650 | Composite devices of laminate type and processes In a composite device of the laminate type having a laminate structure of a composite ceramic layer and a dielectric ceramic layer, the composite ceramic layer including a layer portion having the same composition as the dielectric ceramic layer and a plurality of p... | 04/17/2007 |
| 7206172 | Electrical lapping guide embedded in a shield of a magnetic head An electrical lapping guide (ELG) incorporated into a shield of a magnetic head for measuring lapping process during construction of the magnetic head. ... | 04/17/2007 |
| 7197814 | Method for fabricating a thin film magnetic head A writing magnetic pole portion composed of a first magnetic film and a second magnetic film formed on the first magnetic film via a gap film is fabricated on a given wafer. Then, the writing magnetic pole portion is swung forward and backward around a rotation stan... | 04/03/2007 |
| 7197813 | Method of accurate evaluation on magnetoresistive read element The magnetoresistance is measured for a magnetoresistive layered-structure, such as a spin valve film, prior to formation of an upper shield layer as well as patterning of a lower shield layer. The magnetic influence of the upper and lower shield layers can complete... | 04/03/2007 |
| 7194802 | Tool for certifying a head-gimbal assembly A device and method for testing a slider of a head-gimbal assembly during disc drive manufacturing. The device includes a test disc, an actuator arm and a control module. The test disc has a first circumferential area for detecting contact between the slider and the... | 03/27/2007 |
| 7193824 | Method and apparatus for testing magnetic head with TMR element A magnetic head testing apparatus having the function of evaluating pin holes in a tunnel barrier layer of a TMR element by a non destructive inspection is disclosed. The testing apparatus comprises a temperature control unit which sets a circumferential temperature... | 03/20/2007 |
| 7185417 | Method for shaping an air bearing surface of a magnetic head slider A method for shaping an ABS of a magnetic head slider including a step of holding at least one row bar with a plurality of aligned thin-film magnetic head elements by adhering a first surface of the at least one row bar to an adhesive or UV tape capable of passing a... | 03/06/2007 |
| 7165317 | Electrode extension sheet for use in a lapping apparatus The present invention is an object to provide an apparatus or a method making it possible to easily effect connection between additional electrodes, etc. and lead electrodes when performing a processing for achieving a predetermined throat height value or crown proc... | 01/23/2007 |
