Patents by Inventor David Shiao-Min Kuo

David Shiao-Min Kuo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8946835
    Abstract: A planarization process may planarize a media disk that has data trenches between data features and larger servo trenches between servo features. A filler material layer is deposited on the media disk and provides step coverage of the trenches. The filler material has data recesses over the data trenches and servo recesses over the servo trenches that must be removed to produce a planar media surface. A first planarization process is used to remove the data recesses and a second planarization process is used to remove the servo recesses.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: February 3, 2015
    Assignee: Seagate Technology LLC
    Inventors: Yuan Xu, Wei Hu, Justin Jia-Jen Hwu, Gene Gauzner, Koichi Wago, David Shiao-Min Kuo
  • Publication number: 20140308439
    Abstract: The embodiments disclose a method of protecting patterned magnetic materials of a stack, including depositing a thin continuous film of an inert material that is inert to the magnetic materials of a patterned stack upon which the thin continuous film is being deposited and forming a thin interim interface layer from the thin continuous film to protect top and sidewall areas of non-etched higher relief magnetic islands and magnetic film etched surfaces of the patterned stack from air exposure damage and damage from contact with backfilled materials.
    Type: Application
    Filed: June 25, 2014
    Publication date: October 16, 2014
    Inventors: Zhaohui Fan, Yuan Xu, Justin Jia-Jen Hwu, Koichi Wago, David Shiao-Min Kuo
  • Publication number: 20130070370
    Abstract: A planarization process may planarize a media disk that has data trenches between data features and larger servo trenches between servo features. A filler material layer is deposited on the media disk and provides step coverage of the trenches. The filler material has data recesses over the data trenches and servo recesses over the servo trenches that must be removed to produce a planar media surface. A first planarization process is used to remove the data recesses and a second planarization process is used to remove the servo recesses.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 21, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Yuan Xu, Wei Hu, Justin Jia-Jen Hwu, Gene Gauzner, Koichi Wago, David Shiao-Min Kuo
  • Publication number: 20130004736
    Abstract: The embodiments disclose a method of protecting patterned magnetic materials of a stack, including depositing a thin continuous film of an inert material that is inert to the magnetic materials of a patterned stack upon which the thin continuous film is being deposited and forming a thin interim interface layer from the thin continuous film to protect top and sidewall areas of non-etched higher relief magnetic islands and magnetic film etched surfaces of the patterned stack from air exposure damage and damage from contact with backfilled materials.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 3, 2013
    Applicant: SEAGATE TECHNOLOGY, LLC
    Inventors: Zhaohui Fan, Yuan Xu, Justin Jia-Jen Hwu, Koichi Wago, David Shiao-Min Kuo
  • Patent number: 8308964
    Abstract: A planarization process may planarize a media disk that has data trenches between data features and larger servo trenches between servo features. A filler material layer is deposited on the media disk and provides step coverage of the trenches. The filler material has data recesses over the data trenches and servo recesses over the servo trenches that must be removed to produce a planar media surface. A first planarization process is used to remove the data recesses and a second planarization process is used to remove the servo recesses.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: November 13, 2012
    Assignee: Seagate Technology LLC
    Inventors: Yuan Xu, Wei Hu, Justin Jia-Jen Hwu, Gene Gauzner, Koichi Wago, David Shiao-Min Kuo
  • Publication number: 20120196094
    Abstract: A method for nano-patterning includes imprinting features in a resist with an imprint mold to form one or more topographic surface patterns on the imprinted resist. A a block copolymer (“BCP”) material is deposited on the imprinted resist, wherein a molecular dimension L0 of the BCP material correlates by an integer multiple to a spacing dimension of the one or more topographic surface patterns on the imprinted resist. The deposited BCP is annealed and at least a portion of the annealed BCP is removed, forming a template having discrete domains.
    Type: Application
    Filed: January 31, 2011
    Publication date: August 2, 2012
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Yuan Xu, Kim Lee, Wei Hu, Koichi Wago, David Shiao-Min Kuo
  • Publication number: 20120080402
    Abstract: A planarization process may planarize a media disk that has data trenches between data features and larger servo trenches between servo features. A filler material layer is deposited on the media disk and provides step coverage of the trenches. The filler material has data recesses over the data trenches and servo recesses over the servo trenches that must be removed to produce a planar media surface. A first planarization process is used to remove the data recesses and a second planarization process is used to remove the servo recesses.
    Type: Application
    Filed: September 30, 2010
    Publication date: April 5, 2012
    Applicant: Seagate Technology LLC
    Inventors: Yuan Xu, Wei Hu, Justin Jia-Jen Hwu, Gene Gauzner, Koichi Wago, David Shiao-Min Kuo
  • Publication number: 20110051286
    Abstract: A recordable magnetic media includes a servo pattern having a plurality of adjacent alternating magnetic and nonmagnetic material stripes. At least some of the magnetic material stripes have magnetic transitions that define encoded data.
    Type: Application
    Filed: September 1, 2009
    Publication date: March 3, 2011
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: PUSKAL PRASAD POKHAREL, MUSTAFA CAN OZTURK, BARMESHWAR WIKRAMADITYA, ALEXEI H. SACKS, SUNDEEP CHAUHAN, DAVID SHIAO-MIN KUO
  • Publication number: 20100300874
    Abstract: A patterned magnetic layer is formed by bombardment of a masked high Mrt magnetic layer with a combination of both heavy ion species and light ion species. The method can be implemented as sequential process steps or in a single process step with the proper heavy/light ion species mixture. Advantageously, the combined heavy/light ion species bombardment method results in a patterned magnetic layer having high topographical uniformity across its surface.
    Type: Application
    Filed: May 28, 2009
    Publication date: December 2, 2010
    Inventors: David Shiao-Min Kuo, Dieter Weller, Jan-Ulrich Thiele, Justin Hwu, Paritosh Rajora
  • Patent number: 7298678
    Abstract: A rotating recording device, such as an electron beam recorder, is provided with a dual encoder arrangement. A first encoder is employed as a spindle motor controller and located at a first end of a spindle. A second encoder is mounted at a turntable adjacent to a recording surface and used as a position, velocity or clock source for recording the pattern on the substrate. Eccentricity of the mounting of the second encoder is measured against the more accurately mounted spindle control encoder and compensated by a digital clock generating system using a digital phase locked loop.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: November 20, 2007
    Assignee: Seagate Technology LLC
    Inventors: Lawrence M. Bryant, Sundeep Chauhan, David Shiao-Min Kuo
  • Patent number: 7038225
    Abstract: Embodiments of the invention generally provide an electron beam substrate processing system. In one embodiment, the present invention provides an electron beam substrate processing system where a spindle shaft used to rotate substrates during processing includes two encoder wheels. One encoder wheel is configured to provide a rotational speed data signal to a rotational speed control system. Another encoder wheel is configured to provide a pattern generator clock signal at a higher frequency than the rotational speed data signal to a pattern generator. In one embodiment of the present invention, at least one of the encoder wheels is positioned adjacent the substrate to minimize torsional and differential movements between the at least one encoder wheel and the substrate.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: May 2, 2006
    Assignee: Seagate Technology LLC
    Inventors: David Shiao-Min Kuo, Christopher Joseph Formato, Neil Deeman, Sundeep Chauhan, Lawrence Matthias Bryant
  • Patent number: 6987627
    Abstract: A device for use in performing simultaneous contact printing of magnetic patterns in opposing surfaces of a dual-sided magnetic or magneto-optical (MO) recording medium, comprising: (a) a fixedly mounted first magnetic pole having a first end surface; (b) an axially movable second magnetic pole in axial alignment with the first magnetic pole, the second magnetic pole having a second end surface opposite to and facing the first end surface of the first magnetic pole; (c) a first portion of a centering insert fixture mounted on the first end surface of the first magnetic pole; and (d) a second portion of a centering insert fixture mounted on the second end surface of the second magnetic pole.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: January 17, 2006
    Assignee: Seagate Technology LLC
    Inventors: Gennady Gauzner, David Shiao-Min Kuo
  • Patent number: 6949199
    Abstract: A method of performing thermal imprint lithography of a surface of a thermoplastic layer-coated workpiece for forming a pattern therein comprises pre-heating the workpiece to a pre-selected high temperature prior to inserting the workpiece in a stamping/imprinting tool maintained at a predetermined lower temperature, whereby the interval for thermal cycling of the stamping/imprinting tool between higher and lower temperatures is eliminated or at least reduced. Applications of the method include forming servo patterns in disk-shaped substrates for hard disk recording media.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: September 27, 2005
    Assignee: Seagate Technology LLC
    Inventors: Gennady Gauzner, Koichi Wago, David Shiao-Min Kuo
  • Patent number: 6853514
    Abstract: A method for measuring servo pattern irregularity and other servo information of pre-patterned servo media mounted on a spindle with the center of the pre-pattern tracks off center from the axis rotation of the spindle. An actuator is stepped radially while measuring the PES signals from the servo sectors of at least one highly eccentric track to form a cross track profile of the PES signals for each sector. A mathematical algorithm removes step measurement error from the data. A second mathematical algorithm removes non-repeatable random noise from the data. The amount of phase-in that radially aligns the respective cross track profiles is computed. Servo pattern written-in repeatable runout is determined by unwrapping the phase-in values to form a periodic curve.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: February 8, 2005
    Assignee: Seagate Technology LLC
    Inventors: Xinwei Li, Koichi Wago, David Shiao-Min Kuo
  • Patent number: 6753130
    Abstract: A method for patterning a carbon-containing substrate utilizing a patterned layer of a resist material as a mask and then safely removing the mask from the substrate without adversely affecting the substrate, comprising sequential steps of: (a) providing a substrate including a surface comprising carbon; (b) forming a thin metal layer on the substrate surface; (c) forming a layer of a resist material on the thin metal layer; (d) patterning the layer of resist material; (e) patterning the substrate utilizing the patterned layer of resist material as a pattern-defining mask; and (f) removing the mask utilizing the thin metal layer as a wet strippable layer or a plasma etch/ash stop layer.
    Type: Grant
    Filed: January 17, 2002
    Date of Patent: June 22, 2004
    Assignee: Seagate Technology LLC
    Inventors: Jianwei Liu, David Shiao-Min Kuo, Li-Ping Wang
  • Patent number: 6665077
    Abstract: A method and apparatus for performing interferometric measurement/testing of flying heights of read-write head sliders utilizing an improved rotating disk, the disk having a central opening for use with a spindle for rotation about a central axis, the disk comprising: a substrate comprised of a light transmissive material and including a pair of opposed, smooth, major surfaces; and a wear-resistant, protective overcoat layer on one of the major surfaces for improving the tribological properties thereof; wherein the optical properties of the one surface of the disk are optimized for enhancing the sensitivity of the interferometric measurement/testing by increasing the intensity of reflected light received by a detector of the apparatus.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: December 16, 2003
    Assignee: Seagate Technology LLC
    Inventors: Michael Joseph Stirniman, David Shiao-Min Kuo, Thomas Roy Pitchford
  • Publication number: 20030147171
    Abstract: A method for measuring servo pattern irregularity and other servo information of pre-patterned servo media mounted on a spindle with the center of the pre-pattern tracks off center from the axis rotation of the spindle. An actuator is stepped radially while measuring the PES signals from the servo sectors of at least one highly eccentric track to form a cross track profile of the PES signals for each sector. A mathematical algorithm removes step measurement error from the data. A second mathematical algorithm removes non-repeatable random noise from the data. The amount of phase-in that radially aligns the respective cross track profiles is computed. Servo pattern written-in repeatable runout is determined by unwrapping the phase-in values to form a periodic curve.
    Type: Application
    Filed: June 11, 2002
    Publication date: August 7, 2003
    Inventors: Xinwei Li, Koichi Wago, David Shiao-Min Kuo
  • Patent number: 6580572
    Abstract: A combination glide test/burnishing head can be utilized in a glide test/burnishing system. The combination glide test/burnishing head includes two piezo-electric elements, which can be utilized in a passive mode as sensors for detecting contacts between the glide test/burnishing head and asperities on the surface of a magnetic recording disc. Contact between the glide test/burnishing head and disc asperities results in generation of a defect detection signal, which can be utilized by associated test logic to define the location of the detected asperities on the disc surface. The piezo-electric elements of the glide test/burnishing head can also be utilized in an active mode to cause yaw variation in the flight attitude of the glide test/burnishing head, in turn causing a burnishing pad on the glide test/burnishing head to be moved radially into contact with a detected disc asperity.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: June 17, 2003
    Assignee: Seagate Technology LLC
    Inventors: Wei Hsin Yao, Ramesh Sundaram, David Shiao-Min Kuo
  • Patent number: 6519114
    Abstract: A storage medium is provided that includes a texture zone having a plurality of protrusions. Each of the protrusions is separated by a short circumferential pitch. Alternatively, the texture zone includes a plurality of protrusions with a circumferential pitch less than the diameter of any protrusion. The resonance excitation between the magnetic head and the storage medium in the data storage system is reduced by forming the texture zone with the protrusions that cause the excitation frequencies of the data storage system to shift away from its resonance frequencies.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: February 11, 2003
    Assignee: Seagate Technology, Inc.
    Inventors: Li-Ping Wang, David Shiao-Min Kuo, Wei Hsin Yao
  • Patent number: 6405449
    Abstract: A method and apparatus for data disks adapted to compensate for effects of shock loads imparted to a disk drive which are of sufficient magnitude to cause disk shifts. A series of topographical features are formed on the disk surface or edge to cause signal fluctuation in a sensor during read-back mode operation. An initial signal profile is stored as a map indicative of track or disk alignment with respect to the actuator assembly. Selectively, such as after a known shock event, the topographical features are re-profiled. A comparison of the profiles provides a measure of any track distortion which must be compensated for in future read-write operations by adjustments to data track servo follower algorithms.
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: June 18, 2002
    Assignee: Seagate Technology, LLC
    Inventors: Ramesh Sundaram, Wei Yao, Li-Ping Wang, David Shiao-Min Kuo