Patents Examined by A. J. Heinz
  • Patent number: 7400470
    Abstract: Embodiments of the invention provide a head gimbal assembly (HGA) capable of effecting solder ball connection with use of low energy. In one embodiment, the HGA includes a head/slider. In the head/slider, slider pads and lead wire pads are connected to each other by reflow of solder balls under the radiation of a laser beam. Lead layers are connected to a magnetic head and electrode studs are connected to the lead layers, respectively, and are also connected to the slider pads. The diameter R (m) of a solder ball and a sectional area S (m2) of an electrode stud are in a relation of R2?4S.
    Type: Grant
    Filed: April 21, 2005
    Date of Patent: July 15, 2008
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yuhsuke Matsumoto, Tatsushi Yoshida, Takaaki Murokawa, Tatsumi Tsuchiya, Yoshio Uematsu, Nobuyuki Hashi
  • Patent number: 7394615
    Abstract: A rotating disk storage device is provided with a charging filter capable of efficiently removing dust staying in the interior of the device. In one embodiment, a charging filter is disposed below a magnetic disk and on a bottom of a base. The charging filter has plural through holes by forming a fibrous electret filter medium in a pleat shape. The through holes are formed so as to face a flowing direction of air. Dust, which is moving together with the air flow, is polarized and is attracted to the charging filter. The charging filter can collect even very fine particles without causing such problems as clogging and pressure loss. The pleat portion, which forms the through holes, further exhibits an air flow uniforming effect.
    Type: Grant
    Filed: March 2, 2005
    Date of Patent: July 1, 2008
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Kanako Abe, Herman Russell Wendt, Shingo Tsuda
  • Patent number: 7394622
    Abstract: A magnetic recording medium comprises a magnetically soft underlayer having a plurality of cavities in a surface thereof, and a magnetic recording material in the cavities, wherein a surface of the magnetic recording material in the cavities is substantially coplanar with the surface of the soft underlayer. A recording system that includes the recording medium is also included.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: July 1, 2008
    Assignee: Seagate Technology LLC
    Inventors: Edward Charles Gage, Gary Clark Rauch, Rene Johannes Marinus van de Veerdonk, Hans Juergen Richter, Terry Wayne McDaniel, Mark H. Kryder
  • Patent number: 7394617
    Abstract: The present invention provides a hub/clamp assembly for holding a disk hub in position when the hub is spin in a high speed. The hub/clamp assembly comprises of: a removable disk hub having a shaft for stacking a plurality of storage disks, a flange portion integrally attached to one end of the shaft, and an extension shaft integrally attached to the flange portion opposite to the shaft; wherein the axes of the shaft, the flange portion, and the extension shaft are in alignment; and a hub clamp housing having a housing with side walls and top and bottom surfaces, and a clamp means disposed within the cavity formed within the housing. The present invention also provides a multi-disk servowriter for writing servo information onto multiple storage disks at the same time.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: July 1, 2008
    Assignee: LaserResearch (S) Pte Ltd
    Inventors: Kien-Wee Lai, Wei-Min Wang
  • Patent number: 7394624
    Abstract: A read sensor with a uniform longitudinal bias (LB) stack is proposed. The read sensor is a giant magnetoresistance (GMR) sensor used in a current-in-plane (CIP) or a current-perpendicular-to-plane (CPP) mode, or a tunneling magnetoresistance (TMR) sensor used in the CPP mode. The transverse pinning layer of the read sensor is made of an antiferromagnetic Pt—Mn, Ir—Mn or Ir—Mn—Cr film. In one embodiment of this invention, the uniform LB stack comprises a longitudinal pinning layer, preferable made of an antiferromagnetic Ir—Mn—Cr or Ir—Mn film, in direct contact with and exchange-coupled to sense layers of the read sensor. In another embodiment of the present invention, the uniform LB stack comprises the Ir—Mn—Cr or Ir—Mn longitudinal pinning layer exchange coupled to a ferromagnetic longitudinal pinned layer, and a nonmagnetic antiparallel-coupling spacer layer sandwiched between and the ferromagnetic longitudinal pinned layer and the sense layers.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: July 1, 2008
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventor: Tsann Lin
  • Patent number: 7391594
    Abstract: Apparatus are presented for electrically coupling a slider to ground. In one embodiment, a bonding pad is provided on a side of the slider body separate from the bonding pad(s) used for read/write signals. This separate bonding pad is electrically coupled within the slider body to components that are to be coupled to ground. A separate conductor provided on the suspension (e.g., a trace, a flex circuit, etc.) may be electrically coupled to the separate bonding pad via gold ball bonding. The conductor is also coupled to ground in the hard-disk drive device (e.g., via the preamplifier). The use of the separated bonding pad and trace may negate the need to use a conductive adhesive to electrically ground the slider via its attachment to the tongue of a slider.
    Type: Grant
    Filed: June 6, 2006
    Date of Patent: June 24, 2008
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Yen Fu, Ellis Cha, Po-Kang Wang, Hong Tian, Manuel Hernandez, Yaw-Shing Tang, Ben Hu
  • Patent number: 7389521
    Abstract: A disk cartridge including a lower case member in which a space portion to receive an optical disk is formed; an upper case member, joined to the lower case member, an opening portion to allow a reading/recording device to obtain access to the optical disk; a multi-shutter member, including shutters, installed at the lower case member to be able to slide, and to allow the opening portion to be exposed to the outside when the multiple-shutter member is moved in a direction of the insertion direction of the disk cartridge into a disk drive, such that the shutters overlap each other; and a locking member, installed at the lower case member, to fix the multiple-shutter member to the lower case member so that the multiple-shutter member cannot move arbitrarily.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: June 17, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-kyong Park, Han-kook Choi, Dong-seob Jang
  • Patent number: 7385877
    Abstract: A transport apparatus for a disc-shaped recording medium (2) includes a first transport mechanism (9a) for transporting a first disc (2L) and a second disc (2S) smaller in diameter than the first disc (2L) from a loading position to a reproducing or recording position, and a second transport mechanism (9b) arranged at a position spaced from the second disc (2S) transported to the reproducing or recording position. The second transport mechanism transports the first disc-shaped recording medium, transported by the first transport mechanism (9a) to the reproducing or recording position, to a housing position, and performs control over similar transport of the second disc (2S).
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: June 10, 2008
    Assignee: Sony Corporation
    Inventor: Hajime Mizuno
  • Patent number: 7382578
    Abstract: Provided is a method of manufacturing a thin film magnetic head capable of manufacturing a thin film magnetic head with as high performance as possible. A magnetic pole layer is formed so as to have a laminate structure in which an auxiliary magnetic pole layer (including an adjacent portion and a nonadjacent portion) extending from a first flare point to the rear and a main magnetic pole layer (including a front end portion and a rear end portion) extending from an air bearing surface to the rear through the first flare point are laminated in this order. As (1) a recording track width is controlled with high precision through forming the main magnetic pole layer with high precision, (2) recording is stably performed by an increase in the amount of magnetic flux contained in the main magnetic pole layer, and (3) information recorded on a recording medium is stably maintained through preventing information erasing without intention, the thin film magnetic head can achieve higher performance.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: June 3, 2008
    Assignees: TDK Corporation, SAE Magnetics (H.K.) Ltd.
    Inventors: Naoto Matono, Yasuyuki Notsuke
  • Patent number: 7382584
    Abstract: The problem of increasing the output signal from a CCP-CPP GMR device without having it overheat has been overcome by placing materials that have different thermoelectric potentials on opposing sides of the spacer layer. Heat from the hot junction is removed at the substrate, which acts as a heat sink, resulting in a net local cooling of the confined current spacer layer, enabling it to operate at both higher input voltage increased reliability.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: June 3, 2008
    Assignee: Headway Technologies, Inc.
    Inventors: Yue Liu, Daniel G. Abels, Moris Dovek, Min Li, Pokang Wang, Mao-Min Chen
  • Patent number: 7382574
    Abstract: A perpendicular writer includes a write coil and a main pole having a pole tip for conducting magnetic flux to write data to a magnetic medium. The pole tip includes a plurality of magnetic layers that are magnetically coupled and biased so that their magnetic moment orientations are substantially parallel to an external surface when no write current is applied to the write coil. The pole tip is partially embedded in the yoke, such that portions of the yoke surrounding the pole tip help direct magnetic flux to the pole tip. The pole tip extends beyond the yoke, with a first end located outside the yoke and a second end located within the yoke.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: June 3, 2008
    Assignee: Seagate Technology LLC
    Inventors: Shaoping Li, Chunhong Hou, Lei Wang
  • Patent number: 7380251
    Abstract: A disk apparatus comprises a slot for inserting a disk-shaped recording medium therethrough, a first guide member for guiding one side of the disk inserted through the slot, a second guide member for guiding the other side of the disk inserted through the slot, a disk abutting portion for abutting the disk inserted through the slot, a disk support arm for carrying the disk by supporting and swinging the disk and a recording/reproducing unit for recording and/or reproducing information on and/or from the disk carried into the apparatus by the disk support arm, wherein a first disk having a diameter dA is loaded or unloaded by swinging the disk support arm, and wherein the disk support arm is disposed such that the disk abutting portion abuts and the disk support arm inhibits further insertion of a second disk having a diameter dB that is smaller than dA before the entire insertion of the second disk into the apparatus through any place of the slot while waiting for the insertion of the first disk through the s
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: May 27, 2008
    Assignee: TEAC Corporation
    Inventors: Shinichi Fujisawa, Taku Sato
  • Patent number: 7379276
    Abstract: Provided is a magnetic recording head including a return pole, a writing pole spaced by a predetermined distance from the return pole, an induction writing coil for inducing a magnetic field to be formed across the writing pole, and a plurality of shield layers formed on the writing pole. Accordingly, magnetic fields generated inside and outside the magnetic recording head are prevented from concentrating on the return pole, and information is effectively written on and erased from an information recording media.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: May 27, 2008
    Assignees: Samsung Electronics Co., Ltd., Institute for Information Technology Advancement
    Inventors: Young-hun Im, Yong-su Kim
  • Patent number: 7379264
    Abstract: According to an embodiment, a method for accessing a cell includes: a first access step of taking out a cartridge from the cell or inserting the cartridge into the cell in an initial stop position; and a second access step of taking out the cartridge from the cell or inserting the cartridge into the cell in one or more positions in the vicinity of the initial stop position until the taking-out or insertion operation succeeds in a case where the first access step has failed.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: May 27, 2008
    Assignee: NEC Corporation
    Inventor: Tohru Yoshida
  • Patent number: 7379280
    Abstract: A magneto-resistance device is composed of an anti-ferromagnetic layer (5), a pinned ferromagnetic layer (20), a tunnel insulating layer (9) and a free ferromagnetic layer (21). The pinned ferromagnetic layer (20) is connected to the anti-ferromagnetic layer (5) and has a fixed spontaneous magnetization. The tunnel insulating layer (9) is connected to the pinned ferromagnetic layer (20) and is non-magnetic. The free ferromagnetic layer (21) is connected to the tunnel insulating layer (9) and has a reversible free spontaneous magnetization. The pinned ferromagnetic layer (20) has a first composite magnetic layer (6) to prevent at lest one component of the anti-ferromagnetic layer (5) from diffusing into tunnel insulating layer (9).
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: May 27, 2008
    Assignee: NEC Corporation
    Inventors: Yoshiyuki Fukumoto, Ken-ichi Shimura, Atsushi Kamijo
  • Patent number: 7372648
    Abstract: A pair of members opposed to each other via a gap are commonly used as an evanescent light probe and a writing magnetic head. When the spacing and width of the gap are smaller than the wavelength ? of injected light, highly intensive evanescent light is generated from the gap position of the opposite surface. Magnetic writing is carried out by applying a recording magnetic field from the pair of members to a medium heated by the evanescent light.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: May 13, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Junichi Akiyama, Akira Kikitsu, Tadashi Kai, Toshihiko Nagase, Tomoyuki Maeda
  • Patent number: 7372664
    Abstract: Techniques for reducing adjacent track erasure include: a bucking coil having a lower number of turns than the write coil for bucking out a portion of the field induced by the write coil; a hybrid solenoid coil that includes turns that are in a pancake arrangement and turns that are in a solenoid arrangement; a P2 write pole tip with an increasing amount of flare as the distance from the ABS increases; a notch along an edge of the ABS surface of the P1 write pole adjacent to a tooth that extends closest to the P2 write pole; a back notch adjacent to the tooth on the P1 write pole that has a width generally corresponding to the width of the tooth; and a layered structure on the pole tip of the P1 write pole adjacent to the tooth, the layers having at least one of decreasing amounts of saturation magnetization, decreasing amounts of permeability, or alternating layers of magnetic and nonmagnetic material, where the width of the magnetic and nonmagnetic layers in controlled or the characteristics of the magnetic
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: May 13, 2008
    Assignee: Maxtor Corporation
    Inventors: Michael Mallary, Mourad Benakli
  • Patent number: 7373649
    Abstract: According to the present invention, there is provided a disk cartridge capable of being made compact although the disc cartridge has double structure, which cartridge is improved in light blocking effect and dustproof property, and is particularly suitable for use as a media disk. In this disk cartridge, a shutter is slidably mounted between an inner case and an outer case, and a joint surfaces of upper and lower halves of the inner case, and joint surfaces of upper and lower halves of the outer case are provided at positions at different heights. Light incidence preventing parts which consist of sets of a plurality of lines of ribbed projections are formed on an inner surface of the upper half and an inner surface of the lower half of the outer case.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: May 13, 2008
    Assignee: Hitachi Maxell, Ltd.
    Inventor: Atsushi Sato
  • 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: 7369353
    Abstract: A tape cartridge transport assembly for moving a tape cartridge between a first library and a second library includes a guide arrangement disposable between the first and second libraries, and a cartridge carrier that is moveable along the guide arrangement. The cartridge carrier includes a carrier body having an opening for receiving the tape cartridge, and a retention device associated with the carrier body. The retention device is engageable with the tape cartridge for retaining the tape cartridge in the carrier body as the cartridge carrier moves along the guide arrangement. The assembly further includes a drive mechanism associated with the cartridge carrier for automatically moving the cartridge carrier along the guide arrangement.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: May 6, 2008
    Assignee: Storage Technology Corporation
    Inventors: Sanjiv K. Gupta, Randal D. Fird, Roger Grow, Daniel J. Plutt