Using Reference Point/surface To Facilitate Measuring Patents (Class 29/603.1)
  • Patent number: 10287781
    Abstract: The present invention relates generally to a tile or panel having at least one magnetic material embedded therein, and fully or partially covered with at least one layer of parchment. The invention also encompasses at least one discrete permanent magnet that is placed at an appropriate location within a panel or tile, and wherein at least a portion of the panel or tile and the at least one magnet are then optionally covered with at least one layer of at least one barrier material, and then at least one parchment layer partially or fully envelopes this assembly. The inventive tile having at least one magnetic type material can have at least one indicia or design on at least one surface, and the inventive tile can be magnetically attached to a wall or another panel having at least one magnetic type material to form a wall or panel surface.
    Type: Grant
    Filed: February 18, 2017
    Date of Patent: May 14, 2019
    Assignee: PERGAMENA PARCHMENTS & LEATHERS, INC.
    Inventor: Jesse Karl Meyer
  • Patent number: 10008222
    Abstract: A method and system provide a storage device. A plurality of read sensor stacks for each reader of the storage device are provided. The read sensor stacks are distributed along a down track direction and offset in a cross-track direction. A plurality of electronic lapping guides (ELGs) are provided for the read sensor stacks. The read sensor stacks are lapped. Lapping is terminated based on signal(s) from the ELG(s).
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: June 26, 2018
    Assignee: Western Digital (Fremont), LLC
    Inventors: Steven C. Rudy, Christopher L. Beaudry, Shaoping Li
  • Patent number: 9870786
    Abstract: According to one embodiment, a method of manufacturing a magnetic recording head includes forming a microwave oscillator to cover a main pole and a side shield and also to cross at least a part of a side gap between the main pole and the side shield, and lapping the main pole, the side shield and the microwave oscillator in a height direction while monitoring an electric resistance between the main pole and the side shield.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: January 16, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomomi Funayama, Akihiko Takeo
  • Patent number: 9622352
    Abstract: In a mark forming step in a manufacturing method for a component incorporated substrate in which an electronic component is positioned with reference to a mark formed in a copper layer, when an imaginary line extending from a search center of a search range of a sensor, to an edge side of the search range is represented as a search reference line and an imaginary line extending, in a state in which a mark center, is matched with the search center, from the mark center in the same direction as the search reference line to an outer ridgeline of the mark is represented as a mark reference line, the mark formed in a shape in which the outer ridgeline of the mark is present in a position where a length of the mark reference line is in a range of 30% or more of the search reference line.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: April 11, 2017
    Assignee: MEIKO ELECTRONICS CO., LTD.
    Inventors: Ryoichi Shimizu, Mitsuo Iwamoto, Mitsuaki Toda
  • Patent number: 9526182
    Abstract: The method includes positioning an electronic component using main marks formed on a metal layer and mounting the electronic component on a second surface of the metal layer with an adhesive layer interposed between the metal layer and both of the electronic component and terminals; then burying the electronic component and the main marks in an insulating substrate; then removing part of the metal layer and forming a first window for exposing the main marks therefrom and a second window for exposing the adhesive layer including a position corresponding to the terminal therefrom; then using the exposed main marks as references and forming a laser via hole LVH reaching the terminal in the adhesive layer exposed from the second window; and thereby forming a wiring pattern from the metal layer electrically connected to the terminal through a first conductive via formed by plating the LVH with copper.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: December 20, 2016
    Assignee: MEIKO ELECTRONICS CO., LTD.
    Inventors: Ryoichi Shimizu, Tohru Matsumoto, Takuya Hasegawa, Yoshio Imamura
  • Patent number: 9448256
    Abstract: It is intended to reduce manufacturing cost in a current sensor including a primary conductor having a U-shaped current path. A current sensor includes a primary conductor having a U-shaped current path, a support portion for supporting a magneto-electric conversion element, and a lead terminal connected to the support portion, and wherein the current path is not overlapped with the support portion in a plan view, while being formed so as to have a height different from that of the support portion in a side view.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: September 20, 2016
    Assignee: Asahi Kasei Microdevices Corporation
    Inventors: Kenji Suzuki, Hideto Imajo, Daigo Takagi
  • Patent number: 8881377
    Abstract: A method for determining a critical dimension of a structure along a plane of interest from a measurement along a test plane that is not necessarily located at the plane of interest. The method involves slicing a structure along a test plane and measuring a marker feature in this test plane. A determination of a critical dimension of a feature at the plane of interest is then determined based on the measurement of the marker feature measurement at the test plane. This testing methodology can be useful, for example in the measurement of a critical dimension of a write pole at an air bearing surface plane form a measurement of a test feature at a plane that is not necessarily located at the air bearing surface plane.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: November 11, 2014
    Assignee: HGST Netherlands B.V.
    Inventor: Chester X. Chien
  • Patent number: 8870472
    Abstract: A computer program product for fabricating an optical assembly, having a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code includes a first computer readable program code configured to horizontally position a flexible portion of a substrate including a waveguide, the waveguide exposed at one end edge of the substrate; a second computer readable program code configured to bend the flexible portion of the substrate to place the waveguide exposed end in approximately a vertical position; a third computer readable program code configured to vertically position a flip-chip bonder bond head containing an optical component upon the waveguide exposed substrate edge to optically mate the optical component with the exposed waveguide; and a fourth computer readable program code configured to fixably mount the optical component to the substrate edge.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: October 28, 2014
    Assignee: International Business Machines Corporation
    Inventors: Stefano Sergio Oggioni, Jonas R. Weiss, Bert Jan Offrein
  • Patent number: 8758083
    Abstract: A method and system for providing transducer(s) including a disk structure and having an air-bearing surface (ABS) are described. The disk structure resides a distance from the ABS and has a disk dimension substantially perpendicular to the ABS. Lapping control and disk windage ELGs are provided. The lapping control ELG has first and second edges first and second distances from the ABS. The disk windage ELG has edges different distances from the ABS. A difference between these edges corresponds to the disk dimension. A windage resistance of the disk windage ELG is measured and a disk windage determined. The disk windage corresponds to a difference between designed and actual disk dimensions perpendicular to the ABS. A lapping ELG target resistance is determined based on the disk windage. The transducer is lapped. Lapping is terminated based on a resistance of the lapping control ELG and the lapping ELG target resistance.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: June 24, 2014
    Assignee: Western Digital (Fremont), LLC
    Inventors: Steven C. Rudy, Changqing Shi, Yufeng Hu, Mark D. Moravec, Eric R. McKie, Nurul Amin
  • Patent number: 8677607
    Abstract: The method according to the present invention includes the steps of: sequentially applying a plurality of different voltages to an MR element and sequentially detecting output signals from the MR element; and eliminating the MR element as a defective product when an evaluation value, based on a difference of SN ratios of the output signals from the MR element respectively obtained for each applied voltage, is less than a threshold value, and selecting the MR element as a non-defective product when the evaluation value is greater than or equal to the threshold value.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: March 25, 2014
    Assignee: TDK Corporation
    Inventors: Takumi Yanagisawa, Masaru Hirose, Shunji Saruki
  • Patent number: 8544164
    Abstract: According to one embodiment, a head stack assembly cartridge is provided. The head stack assembly cartridge includes a base plate having a pivot shaft for pivotally mounting a head stack assembly and a base voice coil motor magnet attached to an inner surface of the base plate. The base voice coil motor magnet is arranged on the inner surface of the base plate to be adjacent to a coil of the head stack assembly pivotally mounted on the pivot shaft. The head stack assembly cartridge further includes a cover removably attached to the base plate and a pivot clamp removably attached to the cover and configured to secure the head stack assembly pivotally mounted on the pivot shaft.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: October 1, 2013
    Assignee: Western Digital Technologies, Inc.
    Inventors: Chunjer Chuck Cheng, Tao Lin, Gang Herbert Lin
  • Patent number: 8516686
    Abstract: A slider tester includes a disk, movable table, table drive mechanism, guide member, etc. A plurality of suspensions are mounted on the movable table. A slider is mounted on each suspension. A guide member can support respective lift tabs of the suspensions. The guide member includes a first guide surface, second guide surface, and opening arranged in a track width direction of the disk. When any of the lift tabs gets into the opening as the movable table moves in the track width direction of the disk, the slider is dropped toward a recording surface of the disk.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: August 27, 2013
    Assignee: NHK Spring Co., Ltd.
    Inventor: Akira Nojima
  • Patent number: 8424191
    Abstract: A method for manufacturing a thermally-assisted magnetic recording head is provided, in which joined are: a light source unit that includes a light source having a surface including a light-emission center on the joining surface side of a unit substrate; and a slider that includes an optical system having a light-receiving end surface reaching a back surface opposite to the opposed-to-medium surface. This method utilizes “semi-active alignment” that uses an alignment light, and comprises steps of: causing a light to enter the light source from a surface opposite to the light-emission center; detecting the light that has passed through the light source and is emitted from the light-emission center to align the light-emission center with the light-receiving end surface of the slider; and bonding the light source unit to the slider. This manufacturing method can achieve the alignment with a sufficiently high alignment accuracy in a short processing time.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: April 23, 2013
    Assignee: TDK Corporation
    Inventors: Koji Shimazawa, Seiichi Takayama, Eiji Komura, Osamu Shindo, Takashi Honda
  • Patent number: 8369047
    Abstract: A flexure metal plate includes distal and proximal end side-center-support plate forming regions that are positioned on distal and proximal sides within an open section. To a distal end section of a supporting part that is positioned on a distal side of the open section, first and second-distal side-metal plates are fixed so as to be positioned on an outer side of the distal end side-center-support plate forming region in a width direction, and to a proximal end section of the supporting part that is positioned on a proximal side of the open section, first and second-proximal side-metal plates are fixed so as to be positioned on an outer side of the proximal end side-center-support plate forming region in the width direction. The first and second-distal side-metal plates form a distal end side-support plate in cooperation with the distal end side-center-support plate forming region.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: February 5, 2013
    Assignee: Suncall Corporation
    Inventors: Yasuo Fujimoto, Satoru Takasugi, Kenji Mashimo
  • Patent number: 8339752
    Abstract: In one embodiment, a magnetic head includes a magnetoresistive free layer, wherein a width of the free layer nearest an air bearing surface (ABS) is less than a width of the free layer at a point away from the ABS in a track width direction, with the magnetic head being configured to pass a sense current in a direction perpendicular to a plane of deposition of the free layer. In another embodiment, a method includes forming a magnetoresistive film above a shield, forming a masking layer above the magnetoresistive film, patterning the masking layer such that it exposes portions of the magnetoresistive film, wherein the masking layer defines an area which is narrow near an area that forms an ABS side of a free layer and wider at an area away from the ABS, and removing the exposed portions of the magnetoresistive film to form the free layer.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: December 25, 2012
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Masashi Hattori, Koichi Nishioka, Koji Sakamoto, Tsutomu Yasuda, Hideki Mashima
  • Patent number: 8339733
    Abstract: A base member on which a plurality of components are mounted includes a base main body, a coating formed on a surface of the base main body, and a display portion formed by a contrast between the coating and the surface of the base main body. The display portion displays a state by which it is determined whether or not the base main body has been machined in accordance with a corresponding machining program.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: December 25, 2012
    Assignee: Panasonic Corporation
    Inventors: Taizo Ikegawa, Shoichi Yoshikawa, Toshiyuki Ninomiya, Hiroshi Nasu
  • Patent number: 8307539
    Abstract: A method for modeling devices in a wafer comprises the step of providing the wafer comprising a first plurality of devices having a track width and a first stripe height, a second plurality of devices having the track width and a second stripe height, and a third plurality of devices having the track width and a third stripe height. The method further comprises the steps of measuring resistance values for the first, second and third plurality of devices to obtain a data set correlating a stripe height and a resistance value for each of the first, second and third plurality of devices, and estimating a linear relationship between resistance and inverse stripe height for the first, second and third plurality of devices based on the data set.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: November 13, 2012
    Assignee: Western Digital (Fremont), LLC
    Inventors: Steven C. Rudy, Eric R. Mckie, Mark D. Moravec
  • Patent number: 8163186
    Abstract: A method of manufacturing magnetic heads comprises the step of: fabricating a magnetic head substructure by forming a plurality of components of the magnetic heads on a single substrate, wherein a plurality of rows of pre-head portions that will be the respective magnetic heads later are aligned in the substructure; and fabricating the magnetic heads by separating the pre-head portions from one another through cutting the substructure. In the step of fabricating the substructure, a plurality of indicators are formed, each of the indicators serving as a reference for indicating the location of a region ABS in which the medium facing surfaces of the magnetic heads are to be formed.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: April 24, 2012
    Assignee: Headway Technologies, Inc.
    Inventors: Yoshitaka Sasaki, Hiroyuki Itoh, Shigeki Tanemura, Hironori Araki
  • Patent number: 8151441
    Abstract: 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 resistance of the stripe and calibrating an offset of the top edge of the stripe from the back edge of the structure. The method further includes terminating the lapping based at least on the sheet resistance and offset of the ELG.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: April 10, 2012
    Assignee: Western Digital (Fremont), LLC
    Inventors: Steven C. Rudy, Matthew R. Gibbons, Curtis V. Macchioni, Yun-Fei Li, Changhe Shang, Carlos Corona
  • Patent number: 8146235
    Abstract: A head suspension for supporting a head slider over a storage media in a dynamic storage device is provided with a head suspension component having a spring metal layer, an electrically conductive layer and a dielectric layer interposed between the metal layer and the electrically conductive layer. A plurality of electrically conductive traces with bond pads are formed in the electrically conductive layer. A feature datum is also formed in the electrically conductive layer on a detachable carrier strip. The feature datum defines a first edge in the electrically conductive layer parallel to an edge of the bond pads.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: April 3, 2012
    Assignee: Hutchinson Technology Incorporated
    Inventor: Raymond R. Wolter
  • Patent number: 8127433
    Abstract: In a manufacturing method of a glass substrate for a magnetic disk including a cleaning process of the glass substrate, the cleaning process includes a process of contacting the glass substrate with a cleaning solution containing a compound, such as thioglycolic acid or a thioglycolic acid derivative, having a thiol group as a functional group.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: March 6, 2012
    Assignee: Hoya Corporation
    Inventor: Yoshinori Marumo
  • Patent number: 8117736
    Abstract: A method of lapping a magnetic head slider includes a step of lapping a lapping surface of a row bar provided with a plurality of MR read head elements arranged along at least one line, a step of obtaining at least one output signal from at least one of the plurality of MR read head elements of the row bar during lapping, the at least one output signal corresponding to element resistance, a step of detecting at least one peak value of the obtained at least one output signal, and a step of controlling an amount of lapping of the row bar depending upon the detected at least one peak value.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: February 21, 2012
    Assignee: TDK Corporation
    Inventors: Naoki Ohta, Takeo Kagami
  • Patent number: 8112873
    Abstract: According to one embodiment, an input-output (I-O) panel is transformed. The I-O panel is configured to couple to an array of first midplane connectors of a first shelf configured according to a first format, where the first shelf has rear access. The I-O panel comprises an array of I-O panel connectors and defines an xy-plane. An array of second midplane connectors of a second shelf is transformed to substantially align the second midplane connectors with the I-O panel connectors. The second shelf is configured according to a second format, where the second shelf has front access. The array of second midplane connectors is arranged in columns defining a midplane column axis and rows defining a midplane row axis.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: February 14, 2012
    Assignee: Fujitsu Limited
    Inventor: Stephen J. Brolin
  • Patent number: 8082658
    Abstract: 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 feature in the recording head, such as a wrap around shield. The conductive material is then deposited on the ABS of the row to fill the voids, and the row is lapped. According to methods provided herein, the resistance of one or more lapping guides in the row of recording heads is monitored to determine when the conductive material is removed by the lapping process. When the monitored resistance indicates that the conductive material is removed, the lapping process is stopped. The resistance across one or more lapping guides may also be used to control the lapping process to uniformly lap the conductive material from the ABS.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: December 27, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Thomas D. Boone, Jr., Glenn P. Gee, Paul A. Goddu, John P. Herber, Hicham M. Sougrati, Huey-Ming Tzeng
  • Patent number: 8003304
    Abstract: A method for manufacturing a magnetic write head for perpendicular magnetic recording. The method provides for accurate definition of a device feature such as a write pole flare point. A functional lapping guide is formed to determine when a lapping operation should be terminated to define an air bearing surface of a slider. In order to provide accurate compensation for manufacturing variations in the functional lapping guide, a dummy lapping guide is provided. An amount of variation of a front edge of the dummy lapping guide, which is defined by the same process step as a writer pole flare point, can be calculated by measuring the width (stripe height) of the dummy lapping guide based on its electrical resistance.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: August 23, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Vladimir Nikitin, Yi Zheng
  • Patent number: 7896552
    Abstract: A rotary encoder includes a rotary shaft that may be manufactured easily and efficiently includes a rotating magnet with a mounting precision in which variance may not occur readily. A rotary shaft includes a rotary shaft main unit with a rotating magnet mounting part for mounting a rotating magnet and a ring-shaped rotating magnet that is formed integrally with this rotating magnet mounting part of the rotary shaft. In a method of manufacturing the rotary shaft, a ring-shaped rotating magnet is formed integrally with the rotary shaft mounting part of the rotary shaft main unit.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: March 1, 2011
    Assignee: Johannes Heidenhain GmbH
    Inventors: Yoshiyuki Nakamura, Hiroshi Haga
  • Patent number: 7821744
    Abstract: A thin film magnetic head substrate includes a plurality of head element portions having read elements and write elements in rows. Adjacent head element portions interpose a read monitor element and a write monitor element that are used as element resistance monitors for the read element and the write element when a lapping process is performed to form a medium-facing surface on the head element portion. A common electrode terminal is connected with the read monitor element and the write monitor element. A pair of individual electrode terminals are each connected to the read monitor element and the write monitor element, respectively.
    Type: Grant
    Filed: April 9, 2007
    Date of Patent: October 26, 2010
    Assignee: TDK Corporation
    Inventors: Toru Takahashi, Kiyoshi Kobayashi
  • Patent number: 7757379
    Abstract: A suspension assembly for a hard disk drive includes at least two spring extensions that couple to a proximal portion of a load beam. These spring extensions are disposed by a vertical offset and couple to the load beam on opposite sides of a longitudinal axis of the load beam. The method for operating a disk drive apparatus includes following by a suspension assembly from a reference position to a second position a vertical movement of a rotating disk. The suspension assembly is predisposed to move from the reference position to the second position by the vertical offset. A read/write head coupled to the suspension assembly is in closer alignment to a selected track during the vertical movement in the second position than if the first and second spring extensions were disposed to be co-planar.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: July 20, 2010
    Assignee: Magnecomp Corporation
    Inventors: Martin John McCaslin, Khampon Sittipongpanich, Sitthipong Footrakul, Visit Thaveeprungsriporn
  • Patent number: 7716811
    Abstract: Head elements are formed on a wafer to suppress deterioration in pinning strength of a pinned layer, which is caused by ESD generated during air bearing surface polishing of a thin film magnetic head. The wafer is cut into rovers in each of which are connected head elements. Rover air bearing surfaces are polished until an MR elements attain a predetermined height. A final polishing step finishes air bearing surfaces by applying an electroconductive polishing liquid to achieve a predetermined shape and surface roughness with high accuracy. A pinning defect occurrence rate is reduced by suppressing deterioration in pinning strength of a pinned layer of a read element. To achieve this, a specific resistance of the electroconductive polishing liquid is controlled to 5 G?·cm or less. A shallow rail and a deep rail are formed on the air bearing surfaces, and the rover is cut into thin film magnetic heads.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: May 18, 2010
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Takateru Seki, Akihiro Namba, Hideo Yamakura, Takahiro Noji
  • Patent number: 7703193
    Abstract: 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, a coil produces a magnetic field around the slider and processing circuitry monitors both a readback signal amplitude and a resistance of the read sensor. The lapping of the slider is terminated based on the monitoring both the readback signal amplitude and the resistance. Preferably, the lapping of the slider is terminated when the resistance is within a predetermined resistance range and the readback signal amplitude is above a predetermined minimum amplitude threshold or reaches its peak value. Asymmetry can also be measured in the described system, where the lapping process is terminated based on asymmetry as well as resistance and amplitude measurements.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: April 27, 2010
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Jacey Robert Beaucage, Linden J. Crawforth, Xiao Z. Wu
  • Patent number: 7661188
    Abstract: In a manufacturing method of a glass substrate for a magnetic disk including a cleaning process of the glass substrate, the cleaning process includes a process of contacting the glass substrate with a cleaning solution containing a compound, such as thioglycolic acid or a thioglycolic acid derivative, having a thiol group as a functional group.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: February 16, 2010
    Assignee: Hoya Corporation
    Inventor: Yoshinori Marumo
  • Patent number: 7614137
    Abstract: Embodiments of the invention relate to manufacturing method of a magnetic head slider which flies stably even with a reduced peripheral speed resulting from a trend toward a magnetic disk having a smaller diameter. According to one embodiment, a method of manufacturing a magnetic head slider comprises forming a leading side rail surface and a trailing side rail surface, a leading stepped bearing surface and a trailing stepped bearing surface, and a negative-pressure groove surface on an air bearing surface through etching, forming a first stepped surface on the leading side rail surface through sputtering, and forming a second stepped surface by forming a carbon layer on the first stepped surface through sputtering. The first stepped surface has a first height with respect to the leading side rail surface and the second stepped surface has a second height with respect to the first stepped surface.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: November 10, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yoshihiro Taniguchi, Yoshinori Takeuchi
  • Patent number: 7591064
    Abstract: A method is presented for fabrication of a tape medium read head having a unitary formation of multiple elements for reading multi-track data from a magnetic tape. The method includes providing a continuous substrate layer, and forming a sensor material layer on the continuous substrate layer. Photoresist material is deposited on the sensor material layer, and is patterned to form masks which provide protected areas and exposed areas of the sensor material layer. Exposed areas of the sensor material layer are shaped to form sensors from the protected areas of the sensor material layer. Electrical lead materials are deposited between and adjacent to the sensors, and the masks are removed.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: September 22, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventor: Ian Robson McFadyen
  • Publication number: 20090229112
    Abstract: The method of producing a head slider is capable of restraining variation of processing read-elements, forming the read-elements having a prescribed size, improving production yield and improving magnetoresistance characteristics. The method comprises the steps of: forming grooves in a wafer substrate, wherein the grooves correspond to raw bars to be cut from the wafer substrate; filling the grooves with an insulating material; forming read-elements and write-elements on the surface of the wafer substrate, whose grooves have been filled with the insulating material; and cutting the wafer substrate, on which the read-elements and the write-elements have been formed, along the grooves so as to form the raw bars, whose base members are constituted by the wafer substrate and coated with the insulating material.
    Type: Application
    Filed: September 22, 2008
    Publication date: September 17, 2009
    Applicant: FUJITSU LIMITED
    Inventors: Masayuki Hamakawa, Mitsuru Kubo, Satoshi Tomita
  • Patent number: 7536773
    Abstract: A nano-sized CPP aperture is precisely positioned to within a few nanometers of a slider ABS surface to maximize a signal from the disk and to prevent lapping damage to the aperture itself. A linear array of apertures is aligned perpendicular to the ABS plane. The head resistance is monitored during lapping. Each time an aperture is lapped through, there is an increase in head resistance that is equal to the inverse of the total aperture area. There are three equal-sized apertures that are evenly spaced apart. When the first aperture is lapped through, there is a 50% increase in resistance, and a 100% increase in resistance when the second aperture is lapped through. These resistance increases are very large and are easy to distinguish from noise.
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: May 26, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventor: Barry Cushing Stipe
  • Patent number: 7473161
    Abstract: A lapping machine that polishes a head block in which plural head devices are connected in a row includes a jig that has a bottom surface that opposes to a grinding plane, and fixes the head block onto the bottom surface, a pressure mechanism that applies a pressure to the head block against the grinding plane, a detector that is connected to the head block and detects a grinding amount of the head block, and a dummy block fixed onto the bottom surface adjacent to the head block.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: January 6, 2009
    Assignee: Fujitsu Limited
    Inventor: Kiyotaka Nakajima
  • Publication number: 20080212233
    Abstract: A method of manufacturing a storage medium apparatus having a storage medium that stores data. The method includes disposing the storage medium onto a first unit having an insertion section to be inserted into a through hole of the storage medium and an abutment face made of a soft-metal material and spreading around the insertion section, such that the abutment face abuts a surface of the storage medium. The method further includes: abutting an abutment face of a second unit, made of a soft-metal material, on a surface of the storage medium opposite to the surface abutting the abutment face of the first unit; and while holding the storage medium between the first unit and the second unit, fixing the storage medium and at least one of the first unit and the second unit by rotating the storage medium and the one relatively to each other about the through hole.
    Type: Application
    Filed: January 4, 2008
    Publication date: September 4, 2008
    Applicant: Fujitsu Limited
    Inventor: Yoshiyuki Nanba
  • Publication number: 20080184551
    Abstract: Components of a plurality of magnetic heads are formed on a single substrate to fabricate a magnetic head substructure in which a plurality of pre-head portions are aligned in a plurality of rows. The substructure is cut to separate the plurality of pre-head portions from one another, and the plurality of magnetic heads are thereby fabricated. The surface formed by cutting the substructure is lapped to form a lapped surface. The lapped surface is lapped so as to reach a target position of a medium facing surface. The substructure incorporates first to fourth resistor elements each of which detects the position of the lapped surface. The third and fourth detection elements are located at positions shifted from the first and second resistor elements along the direction orthogonal to the medium facing surface.
    Type: Application
    Filed: February 5, 2007
    Publication date: August 7, 2008
    Applicants: HEADWAY TECHNOLOGIES, INC., SAE MAGNETICS (H.K) LTD.
    Inventors: Yoshitaka Sasaki, Hiroyuki Itoh, Kazuo Ishizaki, Ryuji Fujii, Tatsushi Shimizu
  • Patent number: 7401398
    Abstract: A magnetic element for multi-phase is composed by burying a plurality of coils in a composite magnetic material such that a negative coupling of magnetic fluxes or a positive coupling of magnetic fluxes exists between at least two coils. This structure more miniaturizes inductors, or choke coils as the multi-phase magnetic element suitably used for application of a large current to many kinds of electronic equipment. Such multi-phase magnetic element has an excellent ripple current property.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: July 22, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Nobuya Matsutani, Hidenori Uematsu, Tsunetsugu Imanishi
  • Patent number: 7398590
    Abstract: 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, which, in turn, is connected to a gas detection device. Following shock or vibration testing, the gas detection device determines if a leak has occurred, as well as the quality of gas leaked from the disk drive. The present invention also involves a test apparatus designed to check the accuracy and calibration of associated gas detection devices used during the shock and vibration tests. The test apparatus utilizes a sealed test chamber containing a known quantity of gas, which is released during a test event. Knowing the quantity of gas released, the output of the gas detection device can be monitored and calibrated as needed.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: July 15, 2008
    Assignee: Maxtor Corporation
    Inventors: Kimberly C. Mann, Randall T. Lyons, Thomas G. Andrikowich
  • Patent number: 7371488
    Abstract: Provided is a method of manufacturing a magnetic head with which bonding of a slider and a suspension can be performed by taking an ABS pattern, which determines flying characteristics, as a reference, with no special fabrication required on the slider or the suspension. The method relates to a method of manufacturing a magnetic head for attaching a slider, on which an air bearing surface (ABS) is formed, to a suspension. A surface of the slider on which the ABS is formed is photographed, and the ABS and an engraved region formed within the ABS are identified from the photographed image. Then, a reference that serves as a guide in attaching the suspension is computed, and the slider is attached to the suspension based on the reference. It thus becomes possible for positive pressure and negative pressure that occur in the ABS to be well balanced centered about the suspension, making it possible to stabilize flying attitude and electrical characteristics.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: May 13, 2008
    Assignees: TDK Corporation, SAE Magnetics (H.K.) Ltd.
    Inventors: Kazuaki Takanuki, Osamu Shindo, Akimasa Nakao, Masaaki Kaneko, Satoshi Yamaguchi
  • Patent number: 7369361
    Abstract: 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 magnetic heads later are aligned in the substructure; and fabricating the magnetic heads by separating the pre-head portions from one another through cutting the substructure. In the substructure first resistor elements and second resistor elements are formed. Each of the first resistor elements has a resistance that varies depending on the location of an end of an MR element located in a medium facing surface along the direction orthogonal to the medium facing surface. Each of the second resistor elements has a resistance that varies depending on the location of an end face of a track width defining portion located in the medium facing surface along the direction orthogonal to the medium facing surface.
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: May 6, 2008
    Assignee: Headway Technologies, Inc.
    Inventors: Yoshitaka Sasaki, Hiroyuki Itoh, Dong-Hong Li, Hironori Araki, Kazuo Ishizaki
  • Patent number: 7340823
    Abstract: Embodiments include a method for forming a head suspension assembly. A spacer layer is formed in or on a silicon wafer. A transfer film including an opening defining the shape of a slider support membrane is provided, and the opening is filled with a resin material. The transfer film with the resin material therein is positioned over the silicon wafer so that at least a portion of the resin material is positioned adjacent to the spacer layer. The resin material is baked to form a glassy carbon material. The spacer layer is etched to form a trench in the silicon wafer adjacent to the glassy carbon material, and a slider is positioned on the glassy carbon material over the trench.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: March 11, 2008
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventor: Jeffrey S. Lille
  • Publication number: 20070297090
    Abstract: A magnetic read head and a method for manufacturing a magnetic read head are provided. In one embodiment, the method includes providing the magnetic read head comprising a pinning layer disposed over a substrate of the magnetic read head, a pinned layer, a reference layer, a tunneling barrier layer, and a free layer, wherein the free layer is in contact with the tunneling barrier layer. The method further includes milling partially through the free layer from a back surface, thereby creating an exposed face of the free layer which is coplanar with the substrate and oxidizing a portion of the free layer between the exposed face and the tunneling barrier layer. The method further includes milling through the free layer, tunneling barrier layer, reference layer, pinned layer, and pinning layer along lateral sides of the magnetic read head.
    Type: Application
    Filed: June 21, 2006
    Publication date: December 27, 2007
    Inventor: Hardayal S. Gill
  • Publication number: 20070289122
    Abstract: A manufacturing method of an MR element in which current flows in a direction perpendicular to layer planes, includes a step of forming on a lower electrode layer an MR multi-layered structure with side surfaces substantially perpendicular to the layer lamination plane, a step of forming a first insulation layer on at least the side surfaces of the formed MR multi-layered structure, a step of forming a second insulation layer and a magnetic domain control bias layer on the lower electrode layer, and a step of forming an upper electrode layer on the MR multi-layered structure and the magnetic domain control bias layer.
    Type: Application
    Filed: May 31, 2007
    Publication date: December 20, 2007
    Applicant: TDK Corporation
    Inventors: Takeo Kagami, Takayasu Kanaya
  • Patent number: 7308752
    Abstract: An optical pickup apparatus is described which includes a movable unit with an objective lens, a focus servo coil for moving the moveable unit containing the objective lens in the optical-axis direction, and tracking servo coils for moving the moveable unit containing the objective lens in the horizontal directions, and a liquid crystal element disposed for correcting the refractive index. Springs simultaneously provide support for the moveable unit and feed power to the liquid crystal element, the focus servo coil, and the tracking servo coils. A method for making said optical pickup apparatus is described. Two sheets, each having four springs extending across an opening formed by punching, are disposed parallel to each other at a predetermined distance. On these sheets, a fixed unit and a movable unit are formed by insert-molding. Excess portions of the metal sheets are removed, and a through-hole is formed so that connected portions of the wirings, lying side by side, are disconnected.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: December 18, 2007
    Assignee: Sony Corporation
    Inventor: Tetsu Tanaka
  • Patent number: 7301647
    Abstract: 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 center of the floatation surface, and regulating a shape of the floatation surface by using laser to scan a rear surface of the floatation surface so that a flatness at each of plural positions set by the orthogonal coordinate system.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: November 27, 2007
    Assignee: Fujitsu Limited
    Inventor: Fumihiko Tokura
  • Patent number: 7287313
    Abstract: 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 the resulting field at the position of the transverse biasing layer places it in a minimum of potential energy which stabilizes its direction. The field of the longitudinal biasing layer is then reset to the longitudinal direction in a manner which maintains the transverse biasing direction. In a second embodiment, a novel fixture for mounting the read head during processing includes a magnetic portion which stabilizes the transverse bias of the read head. The two methods may be used singly or in combination.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: October 30, 2007
    Assignee: Headway Technologies, Inc.
    Inventors: Yimin Guo, Li-Yan Zhu
  • Patent number: 7275302
    Abstract: 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 plurality of discs and the at least one alignment feature of a second disc of the plurality of discs are utilized to substantially vertically align servo patterns on the first disc with servo patterns on the second disc. A disc pack having discs that include alignment features for aligning servo patterns on the discs is also provided.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: October 2, 2007
    Assignee: Seagate Technology LLC
    Inventor: Hwaliang Ng
  • Publication number: 20070223140
    Abstract: A manufacturing method of a thin-film element having a lower layer with a narrower width is provided, which comprises steps of: forming a first film and a second film on the first film; forming a second layer having a width WUP obtained by trimming the second film; forming a mask film having a smaller etching rate than the first film so as to cover the second layer; forming a pattern having a width WTR larger than the width WUP, obtained by collectively trimming the mask film covering the second layer and at least an upper portion of the first film; and forming a first layer having a width WLO smaller than the width WUP or having a portion with a width WLO smaller than the width WUP, obtained by trimming the first film without changing the width WUP of the second layer.
    Type: Application
    Filed: March 19, 2007
    Publication date: September 27, 2007
    Applicant: TDK Corporation
    Inventors: Hiraku Hirabayashi, Yohei Koyanagi