Patents by Inventor David M. Sigmond

David M. Sigmond 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: 9142237
    Abstract: A disk drive includes a drive housing, a storage disk, a head suspension assembly, an actuator assembly and a controller. The storage disk has a disk surface including a data region that stores data. In one embodiment, the head suspension assembly includes a slider and an attitude adjuster. The slider has an inner side edge, an outer side edge and a data transducer. The attitude adjuster can adjust a roll attitude and/or a pitch attitude of the slider relative to the disk surface. The slider moves between a first position wherein the data transducer is not positioned directly over the data region and a second position wherein the data transducer is positioned directly over the data region during one of a load operation and an unload operation. The controller controls an electrical signal to the attitude adjuster during one of the load operation and the unload operation to dynamically adjust the attitude of the slider.
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: September 22, 2015
    Assignee: MAXTOR CORPORATION
    Inventors: Bernhard Hiller, David M. Sigmond
  • Patent number: 8148207
    Abstract: A method of making a semiconductor chip assembly includes providing a post and a base, mounting an adhesive on the base including inserting the post into an opening in the adhesive, mounting a conductive layer on the adhesive including aligning the post with an aperture in the conductive layer, then flowing the adhesive into and upward in a gap located in the aperture between the post and the conductive layer, solidifying the adhesive, then providing a conductive trace that includes a pad, a terminal and a selected portion of the conductive layer, providing a cap on the post, mounting a semiconductor device on a heat spreader that includes the post, the base and the cap, electrically connecting the semiconductor device to the conductive trace and thermally connecting the semiconductor device to the heat spreader.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: April 3, 2012
    Assignee: Bridge Semiconductor Corporation
    Inventors: Charles W. C. Lin, Chia-Chung Wang, David M. Sigmond
  • Patent number: 8148747
    Abstract: A semiconductor chip assembly includes a semiconductor device, a heat spreader, a conductive trace and an adhesive. The semiconductor device is electrically connected to the conductive trace and thermally connected to the heat spreader. The heat spreader includes a post, a base and a cap. The post extends upwardly from the base into an opening in the adhesive, the base extends below and laterally from the post, and the cap extends above and laterally from the post. The adhesive extends between the post and the conductive trace and between the base and the conductive trace. The conductive trace provides signal routing between a pad and a terminal and the heat spreader provides thermal dissipation between the cap and the base.
    Type: Grant
    Filed: November 28, 2009
    Date of Patent: April 3, 2012
    Assignee: Bridge Semiconductor Corporation
    Inventors: Charles W. C. Lin, Chia-Chung Wang, David M. Sigmond
  • Patent number: 7811863
    Abstract: A method of making a semiconductor chip assembly includes mechanically attaching a semiconductor chip to a routing line, forming a metal pillar on the routing line, forming an encapsulant that covers the chip and the metal pillar, grinding the encapsulant without grinding the metal pillar, then grinding the encapsulant and the metal pillar such that the encapsulant and the metal pillar are laterally aligned, and then attaching a heat sink to the metal pillar.
    Type: Grant
    Filed: February 1, 2009
    Date of Patent: October 12, 2010
    Assignee: Bridge Semiconductor Corporation
    Inventors: Charles W. C. Lin, Chia-Chung Wang, David M. Sigmond
  • Publication number: 20100072510
    Abstract: A semiconductor chip assembly includes a semiconductor device, a heat spreader, a conductive trace and an adhesive. The semiconductor device is electrically connected to the conductive trace and thermally connected to the heat spreader. The heat spreader includes a post, a base and a cap. The post extends upwardly from the base into an opening in the adhesive, the base extends below and laterally from the post, and the cap extends above and laterally from the post. The adhesive extends between the post and the conductive trace and between the base and the conductive trace. The conductive trace provides signal routing between a pad and a terminal and the heat spreader provides thermal dissipation between the cap and the base.
    Type: Application
    Filed: November 28, 2009
    Publication date: March 25, 2010
    Inventors: Charles W.C. Lin, Chia-Chung Wang, David M. Sigmond
  • Publication number: 20100075448
    Abstract: A method of making a semiconductor chip assembly includes providing a post and a base, mounting an adhesive on the base including inserting the post into an opening in the adhesive, mounting a conductive layer on the adhesive including aligning the post with an aperture in the conductive layer, then flowing the adhesive into and upward in a gap located in the aperture between the post and the conductive layer, solidifying the adhesive, then providing a conductive trace that includes a pad, a terminal and a selected portion of the conductive layer, providing a cap on the post, mounting a semiconductor device on a heat spreader that includes the post, the base and the cap, electrically connecting the semiconductor device to the conductive trace and thermally connecting the semiconductor device to the heat spreader.
    Type: Application
    Filed: November 30, 2009
    Publication date: March 25, 2010
    Inventors: Charles W.C. Lin, Chia-Chung Wang, David M. Sigmond
  • Patent number: 6794741
    Abstract: A three-dimensional stacked semiconductor package includes first and second semiconductor chip assemblies and a conductive bond. The first semiconductor chip assembly includes a first semiconductor chip and a first conductive trace with a first routing line and a first pillar. The second semiconductor chip assembly includes a second semiconductor chip and a second conductive trace with a second routing line and a second pillar. The chips are aligned with one another, the pillars are disposed outside the peripheries of the chips and aligned with one another, and the first pillar extends into a cavity in the second pillar. The conductive bond is within the cavity and contacts and electrically connects the pillars.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: September 21, 2004
    Assignee: Bridge Semiconductor Corporation
    Inventors: Charles W. C. Lin, Cheng-Lien Chiang, David M. Sigmond
  • Patent number: 6687081
    Abstract: A disk drive uses seek profile manipulation to provide enhanced transducer fly height control. The maximum seek velocity that is used during a seek operation is made dependent upon, among other things, the direction associated with the seek operation (i.e., either radially inward or radially outward with respect to the disk). In a preferred embodiment, the maximum seek velocity in a direction that normally results in a fly height loss is made less than the maximum seek velocity in the opposite direction. Thus, a minimum transducer fly height can be maintained with minimal effect on average seek time in the disk drive. In one approach, the maximum seek velocity values are stored within a lookup table within the disk drive.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: February 3, 2004
    Assignee: Maxtor Corporation
    Inventors: Matthew O'Hara, Don Brunnet, Yu Sun, David M. Sigmond
  • Patent number: 5219787
    Abstract: Trenching techniques for forming a channel partially through and a via completely through the insulating layer of a substrate are disclosed. With additional steps the channel can form an electrically conductive line, an electrode of an integrated capacitor, or an optical waveguide.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: June 15, 1993
    Assignee: Microelectronics and Computer Technology Corporation
    Inventors: David H. Carey, Douglass A. Pietila, David M. Sigmond
  • Patent number: 5116463
    Abstract: A method for detecting the completion of electrolessly depositing metal into a via. The method includes providing a non-autocatalytic detection mask with an opening over a via containing an autocatalytic material, electrolessly depositing a conductive metal into the via which fails to plate to the mask, and continuing the deposition until metal in the via contacts the mask, at which time the electrochemical potential of the mask changes and the metal plates to and covers the entire mask. The completion of the electroless via fill can be detected by changes in both the appearance and electrochemical potential of the mask.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: May 26, 1992
    Assignee: Microelectroncs and Computer Technology Corporation
    Inventors: Charles W. C. Lin, Randy L. German, Ian Y. K. Yee, David M. Sigmond
  • Patent number: 5101553
    Abstract: A method of making a metal-on-elastomer pressure contact connector. The method includes embedding a plurality of parallel co-planar copper-beryllia wires comprising a plurality of coils in a silicone rubber elastomer with top and bottom surfaces, and removing metal from the tops and bottoms of the coils to form a pair of isolated wire filaments from each coil which extend from the top surface to the bottom surface of the elastomer. The filaments form arrays of electrical contacts above and below the elastomer exceeding 10,000 contacts per square inch.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: April 7, 1992
    Assignee: Microelectronics and Computer Technology Corporation
    Inventors: David H. Carey, David M. Sigmond