Patents by Inventor Tzong-Shii Pan

Tzong-Shii Pan 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).

  • Publication number: 20050044697
    Abstract: A method is provided for controlling the pitch static attitude of a slider in an integrated lead suspension head gimbal assembly. The integrated lead suspension includes a load beam, a mount plate, a hinge and a flexure made out of a multi-layer material. Localized heating is applied to the outrigger leads during the process of forming flexure legs to set a stable pitch static attitude, which does not change, by subsequent thermal exposures.
    Type: Application
    Filed: August 28, 2003
    Publication date: March 3, 2005
    Inventors: William Childers, Tzong-Shii Pan, Surya Pattanaik
  • Publication number: 20050047019
    Abstract: The pitch static attitude of a slider in an integrated lead suspension head gimbal assembly of a disk drive is controlled at the manufacturing stage. The integrated lead suspension includes a load beam, a mount plate, a hinge and a flexure made out of a multi-layer material. The flexure legs and the outrigger leads are simultaneously plastically deformed to define the pitch static attitude. The flexure legs and the outrigger leads are deformed at approximately the same longitudinal location.
    Type: Application
    Filed: August 28, 2003
    Publication date: March 3, 2005
    Inventors: William Childers, Drew Lawson, Tzong-Shii Pan, Surya Pattanaik
  • Publication number: 20050047023
    Abstract: A disk drive is provided with controlled pitch static attitude of the sliders in an integrated lead suspension head gimbal assembly. The integrated lead suspension includes a load beam, a mount plate, a hinge and a flexure made out of a multi-layer material. Localized heating is applied to the outrigger leads during the process of forming flexure legs to set a stable pitch static attitude, which does not change, by subsequent thermal exposures.
    Type: Application
    Filed: August 28, 2003
    Publication date: March 3, 2005
    Inventors: William Childers, Tzong-Shii Pan, Surya Pattanaik
  • Publication number: 20050044698
    Abstract: A method is provided for controlling the pitch static attitude of a slider in an integrated lead suspension head gimbal assembly. The integrated lead suspension includes a load beam, a mount plate, a hinge and a flexure made out of a multi-layer material. The flexure legs and the outrigger leads are simultaneously plastically deformed to define the pitch static attitude. The flexure legs and the outrigger leads are deformed at approximately the same longitudinal location.
    Type: Application
    Filed: August 28, 2003
    Publication date: March 3, 2005
    Applicant: Hitachi Global Storage Technologies
    Inventors: William Childers, Drew Lawson, Tzong-Shii Pan, Surya Pattanaik
  • Patent number: 6801400
    Abstract: An integrated gimbal suspension includes a flexure with an integrated, built-in gimbal, and includes a limiter structure that constrains motions of the gimbal in multi-degrees of freedom. The limiter structure includes one or more tab-shaped limiters and corresponding stops integrally formed into the gimbal assembly at strategic locations, which interact to provide the desired constraints to the motions of the flexure gimbal to prevent permanent damage from over-straining the gimbal or flexure beyond its designed range. The limiters may be pre-formed tab-shaped structures that are bent from the plane of the flexure. As the gimbal moves from its nominal position, one or more limiters engage the stops before such motion reaches the limit of the designed range of motion of the gimbal.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: October 5, 2004
    Assignee: Hitachi Global Storage Technologies, The Netherlands B.V.
    Inventors: Ta-Chang Fu, Hienminh Huu Le, Tzong-Shii Pan
  • Publication number: 20040190203
    Abstract: A magnetic recording disk drive achieves continuous contact recording with a head-suspension assembly that compensates for the moment generated from an adhesive force between the head carrier or slider and the disk. The slider pivot point, which is the point where the load force is applied to the flexure that supports the slider, is located closer to the front end of the slider than the net force applied by the air-bearing surface of the slider when the disk is rotating at its operational speed. This assures that the net air-bearing force generates a moment about the pivot point to partially counteract the flexure moment and the moment generated from the adhesive force between the disk and the slider's contact pad.
    Type: Application
    Filed: March 26, 2003
    Publication date: September 30, 2004
    Inventors: Thomas R. Albrecht, Francis Chee-Shuen Lee, Charles Mathew Mate, Tzong-Shii Pan, Robert N. Payne
  • Patent number: 6785094
    Abstract: A suspension assembly is designed to carry a slider and read/write head elements in a magnetic data storage device. The suspension assembly is formed from a composite laminate structure that includes first, second, third, fourth and fifth material layers. The layers are arranged such that the second layer is disposed between the first and third layers, and the fourth layer is disposed between the third and fifth layers. The laminate structure is configured using a suitable removal process, such as partial chemical etching, to define a mount plate, a hinge, a load beam functional end, and an electrical lead system. The laminate structure may be further formed with a flexure gimbal system that comprises the third, fourth and fifth layers.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: August 31, 2004
    Assignee: Hitachi Global Storage Technologies
    Inventors: Satya Prakash Arya, Tzong-Shii Pan, Surya Pattanaik, Victor Wing Chun Shum
  • Patent number: 6754047
    Abstract: A microactuator device for effecting fine positioning of a transducing head with respect to a selected track on a disk having: an S-shaped piezoelectric element with three or more legs having opposite ends, wherein either; one end of the piezoelectric element is affixed or connected to one end of the slider, and the other end is affixed or connected to the flexure member, or both ends of the element affixed to corresponding ends of the slider and the center is affixed to the flexure, for obtaining movement of the head transducer to enable fast and accurate tracking of read/write tracks on a high track density disk. Attachment of the one leg of piezoelectric element to the flexure produces translation movement of the slider and head transducer while attachment of the center leg of the element to the flexure and the two ends legs to the slider produces a rotary movement of the head transducer.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: June 22, 2004
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Tzong-Shii Pan, Satya Arya
  • Patent number: 6747849
    Abstract: An integrated suspension for a hard disk drive is formed as a single-piece flat assembly. The design eliminates the need for mechanical reinforcement such as flange forming, and requires no additional weld processing to form the functional portion of the assembly. A partial etch process is used to reduce local thicknesses in the gimbal and hinge areas to reduce the overall stiffness of the suspension. The proximal end structure of the suspension is also built by partial etching to achieve higher natural frequencies. The suspension design also incorporates built-in load/unload features and two-sided, opposite-facing limiters to limit excessive slider displacement during the manufacturing process, loading/unloading, and non-operational shock environments.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: June 8, 2004
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Hienminh Huu Le, Tzong-Shii Pan
  • Patent number: 6738231
    Abstract: A microactuator device for effecting fine positioning of a transducing head with respect to a selected track on a disk, wherein the piezoelectric microactuator element is positioned adjacent to one side of and substantially coextensive with a slider, the slider being attached to the moving end of a flexure, and the two ends of the microactuator element are attached to the moving end and fixed legs of the flexure and provide rotary motion.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: May 18, 2004
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Satya P. Arya, Tzong-Shii Pan
  • Publication number: 20030202290
    Abstract: A microactuator device for effecting fine positioning of a transducing head with respect to a selected track on a disk having: an S-shaped piezoelectric element with three or more legs having opposite ends, wherein either; one end of the piezoelectric element is affixed or connected to one end of the slider, and the other end is affixed or connected to the flexure member, or both ends of element affixed to corresponding ends of slider and center affixed to flexure, for obtaining movement of the head transducer to enable fast and accurate tracking of read/write track on a high track density disk. Attachment of the one leg of piezoelectric element to the flexure produces translation movement of the slider and head transducer while attachment of the center leg of the element to flexure and two ends legs to the slider produces a rotary movement of the head transducer.
    Type: Application
    Filed: April 24, 2002
    Publication date: October 30, 2003
    Applicant: International Business Machines Corporation
    Inventors: Tzong-Shii Pan, Satya P. Arya
  • Publication number: 20030202292
    Abstract: A microactuator device for effecting fine positioning of a transducing head with respect the selected track on a disk, wherein the piezoelectric microactuator element is positioned adjacent to one side of and substantially coextensive with a slider, the slider being attached to the moving end of a flexure, and the two ends of microactuator element are attached to moving end and fixed legs of the flexure and provide rotary motion.
    Type: Application
    Filed: April 24, 2002
    Publication date: October 30, 2003
    Applicant: International Business Machines Corporation
    Inventors: Satya P. Arya, Tzong-Shii Pan
  • Publication number: 20030202291
    Abstract: A microactuator device for effecting fine positioning of a transducing head with respect to a selected track on a disk having: a C-shaped piezoelectric element having opposite ends, wherein one end of the piezoelectric element is affixed or connected to one end of the slider, and the other end is affixed or connected to the flexure member for obtaining rotational movement of the piezoelectric element to enable faster and more accurate tracking of the disk by head transducer. Alternately, the C-shaped piezoelectric element has one end affixed or connected to suspension mount plate and other end affixed or actuator arm to obtain larger head movement for further enhanced track following. The C-shaped element could be multiple layered or be shaped like a horizontal or vertical spiral to further increase the element and head movement and tracking accuracy along with faster seek and travel.
    Type: Application
    Filed: April 24, 2002
    Publication date: October 30, 2003
    Applicant: International Business Machines Corporation
    Inventors: Tzong-Shii Pan, Satya P. Arya
  • Publication number: 20030202285
    Abstract: A suspension load beam for carrying a slider and read/write head elements in a magnetic data storage device is formed from a composite laminate material sheet that includes first and second primary layers respectively comprising first and second structural load bearing material sheets sandwiching an intermediate secondary layer comprising a third structural load bearing material sheet. The secondary layer is made of a different material than either of the first and second primary layers. One or more areas of reduced thickness are etched into one or both of the primary layers down to the secondary layer at one or more locations on the laminate material sheet.
    Type: Application
    Filed: April 25, 2002
    Publication date: October 30, 2003
    Applicant: International Business Machines Corporation
    Inventors: Satya Prakash Arya, Tzong-Shii Pan
  • Publication number: 20030202283
    Abstract: A suspension assembly is designed to carry a slider and read/write head elements in a magnetic data storage device. The suspension assembly is formed from a composite laminate structure that includes first, second, third, fourth and fifth material layers. The layers are arranged such that the second layer is disposed between the first and third layers, and the fourth layer is disposed between the third and fifth layers. The laminate structure is configured using a suitable removal process, such as partial chemical etching, to define a mount plate, a hinge, a load beam functional end, and an electrical lead system. The laminate structure may be further formed with a flexure gimbal system that comprises the third, fourth and fifth layers.
    Type: Application
    Filed: April 24, 2002
    Publication date: October 30, 2003
    Applicant: International Business Machines Corporation
    Inventors: Satya Prakash Arya, Tzong-Shii Pan, Surya Pattanaik, Victor Wing Chun Shum
  • Publication number: 20030151844
    Abstract: A servo writer generates a linear servo track timing based servo pattern comprised of transitions that extend laterally of the track. At least three spaced apart write elements, two of parallel azimuthal orientation, and at least one of a different azimuthal orientation, write patterns corresponding to the write elements, fixing both the distance between transitions having different azimuthal orientation, the “A” distance, and the distance between transitions having parallel azimuthal orientation, the “B” distance. The fixed distances provide precise sensing of lateral position based on a measure of time over the “A” distance compared to time over the “B” distance.
    Type: Application
    Filed: February 13, 2002
    Publication date: August 14, 2003
    Applicant: International Business Machines Corporation
    Inventors: James Howard Eaton, Wayne Isami Imaino, Tzong-Shii Pan
  • Publication number: 20030137774
    Abstract: An integrated gimbal suspension comprises a flexure with an integrated, built-in gimbal, and includes a limiter structure that constrains motions of the gimbal in multi-degrees of freedom. The limiter structure includes one or more tab-shaped limiters and corresponding stops integrally formed into the gimbal assembly at strategic locations, which interact to provide the desired constraints to the motions of the flexure gimbal to prevent permanent damage from overstraining the gimbal or flexure beyond its designed range. The limiters may be pre-formed tab-shaped structures that are bent from the plane of the flexure. As the gimbal moves from its nominal position, one or more limiters engage the stops before such motion reaches the limit of the designed range of motion of the gimbal.
    Type: Application
    Filed: January 24, 2002
    Publication date: July 24, 2003
    Inventors: Ta-Chang Fu, Hienminh Huu Le, Tzong-Shii Pan
  • Patent number: 6552875
    Abstract: A suspension design for improving the curing process for head bonding application and a method for same is disclosed. Vias are formed in the load beam and the flexure so that UV light is allowed to pass to cure the UV sensitive adhesive thereby bonding the slider to the head gimbal assembly.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: April 22, 2003
    Assignee: International Business Machines Corporation
    Inventors: Hienminh Huu Le, Tzong-Shii Pan
  • Patent number: 6442828
    Abstract: A method for making a suspension system comprising a multiple layer flexure, a load beam and an arm. The load beam extends from the tip of the suspension all the way back to the rear of the arm. Datum holes are located in the load beam such that during assembly all reference points are made from the single load beam piece.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: September 3, 2002
    Assignee: International Business Machines Corporation
    Inventors: David W. Albrecht, Thomas R. Albrecht, Satya Prakash Arya, Tzong-Shii Pan, Surya Pattanaik, Victor Wing Chun Shum
  • Patent number: 6442002
    Abstract: A hard disk drive has a rotatable disk and an actuator arm that pivots relative to the disk. The arm has a cantilevered mounting support with a suspension extending therefrom. A head gimbal assembly is secured to the suspension for reading/writing data to the disk. The mounting support is a two-piece design with a pair of virtually identical support elements. The distal end of each support element has an aperture with a tab that protrudes into the aperture. The tabs extend in opposite directions. The support elements mount on top of each other in a matching alignment configuration. The proximal ends of the support elements closely receive a pivot assembly to secure them from relative movement. On the distal ends, the apertures of the support elements substantially align such that their tabs precise engage each other in an interference fit.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: August 27, 2002
    Assignee: International Business Machines Corporation
    Inventor: Tzong-Shii Pan