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).
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Patent number: 9142237Abstract: 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: GrantFiled: May 26, 2006Date of Patent: September 22, 2015Assignee: MAXTOR CORPORATIONInventors: Bernhard Hiller, David M. Sigmond
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Patent number: 8148207Abstract: 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: GrantFiled: November 30, 2009Date of Patent: April 3, 2012Assignee: Bridge Semiconductor CorporationInventors: Charles W. C. Lin, Chia-Chung Wang, David M. Sigmond
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Patent number: 8148747Abstract: 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: GrantFiled: November 28, 2009Date of Patent: April 3, 2012Assignee: Bridge Semiconductor CorporationInventors: Charles W. C. Lin, Chia-Chung Wang, David M. Sigmond
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Patent number: 7811863Abstract: 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: GrantFiled: February 1, 2009Date of Patent: October 12, 2010Assignee: Bridge Semiconductor CorporationInventors: Charles W. C. Lin, Chia-Chung Wang, David M. Sigmond
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Publication number: 20100072510Abstract: 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: ApplicationFiled: November 28, 2009Publication date: March 25, 2010Inventors: Charles W.C. Lin, Chia-Chung Wang, David M. Sigmond
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Publication number: 20100075448Abstract: 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: ApplicationFiled: November 30, 2009Publication date: March 25, 2010Inventors: Charles W.C. Lin, Chia-Chung Wang, David M. Sigmond
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Patent number: 6794741Abstract: 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: GrantFiled: April 30, 2002Date of Patent: September 21, 2004Assignee: Bridge Semiconductor CorporationInventors: Charles W. C. Lin, Cheng-Lien Chiang, David M. Sigmond
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Patent number: 6687081Abstract: 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: GrantFiled: May 15, 2000Date of Patent: February 3, 2004Assignee: Maxtor CorporationInventors: Matthew O'Hara, Don Brunnet, Yu Sun, David M. Sigmond
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Patent number: 5219787Abstract: 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: GrantFiled: February 24, 1992Date of Patent: June 15, 1993Assignee: Microelectronics and Computer Technology CorporationInventors: David H. Carey, Douglass A. Pietila, David M. Sigmond
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Patent number: 5116463Abstract: 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: GrantFiled: June 19, 1991Date of Patent: May 26, 1992Assignee: Microelectroncs and Computer Technology CorporationInventors: Charles W. C. Lin, Randy L. German, Ian Y. K. Yee, David M. Sigmond
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Patent number: 5101553Abstract: 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: GrantFiled: April 29, 1991Date of Patent: April 7, 1992Assignee: Microelectronics and Computer Technology CorporationInventors: David H. Carey, David M. Sigmond