Patents by Inventor Guo-Quan Lu

Guo-Quan Lu 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: 20130294042
    Abstract: The present disclosure teaches a power module that includes a chip, a first substrate, and one or more electrically conductive inserts disposed between the chip and the first substrate. The inserts can be corrugated metal sheets, metal tubes, metal wires, or metal rods. One or more of those inserts form a layer in the planar direction of a first interstitial space between the chip and the first substrate.
    Type: Application
    Filed: May 7, 2013
    Publication date: November 7, 2013
    Inventors: Guo-Quan LU, David Berry, Yunhui Mei
  • Patent number: 8257795
    Abstract: A paste including metal or metal alloy particles (which are preferably silver or silver alloy), a dispersant material, and a binder is used to form an electrical, mechanical or thermal interconnect between a device and a substrate. By using nanoscale particles (i.e., those which are less than 500 nm in size and most preferably less than 100 nm in size), the metal or metal alloy particles can be sintered at a low temperature to form a metal or metal alloy layer which is desired to allow good electrical, thermal and mechanical bonding, yet the metal or metal alloy layer can enable usage at a high temperature such as would be desired for SiC, GaN, or diamond (e.g., wide bandgap devices). Furthermore, significant application of pressure to form the densified layers is not required, as would be the case with micrometer sized particles.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: September 4, 2012
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Guo-Quan Lu, Guangyin Lei, Jesus Calata
  • Publication number: 20090162557
    Abstract: A paste including metal or metal alloy particles (which are preferably silver or silver alloy), a dispersant material, and a binder is used to form an electrical, mechanical or thermal interconnect between a device and a substrate. By using nanoscale particles (i.e., those which are less than 500 nm in size and most preferably less than 100 nm in size), the metal or metal alloy particles can be sintered at a low temperature to form a metal or metal alloy layer which is desired to allow good electrical, thermal and mechanical bonding, yet the metal or metal alloy layer can enable usage at a high temperature such as would be desired for SiC, GaN, or diamond (e.g., wide bandgap devices). Furthermore, significant application of pressure to form the densified layers is not required, as would be the case with micrometer sized particles.
    Type: Application
    Filed: January 24, 2008
    Publication date: June 25, 2009
    Inventors: Guo-Quan LU, Guangyin Lei, Jesus N. Calata
  • Publication number: 20080089839
    Abstract: Gold suspensions with high concentrations of gold, and silver suspensions with high concentrations of silver, are provided. Gold or silver nanoparticles are put into suspension, where the metal nanoparticles are paired with silica. Biocompatible suspensions are one application. Noble metal particles, attached to the surface of silica particles, form a stable, non-agglomerated suspension due to the steric and repulsive properties of the silica particles. The noble metal particles are prepared by activating the surface of the silica particles and erecting nucleation sites for metal particle growth, and then growing the metal particles at the nucleation sites through a reduction procedure.
    Type: Application
    Filed: September 16, 2005
    Publication date: April 17, 2008
    Inventors: Guo-Quan Lu, Guangyin Lei, Jesus Noel Calata
  • Publication number: 20070183920
    Abstract: A paste including metal or metal alloy particles (which are preferably silver or silver alloy), a dispersant material, and a binder is used to form an electrical, mechanical or thermal interconnect between a device and a substrate. By using nanoscale particles (i.e., those which are less than 500 nm in size and most preferably less than 100 nm in size), the metal or metal alloy particles can be sintered at a low temperature to form a metal or metal alloy layer which is desired to allow good electrical, thermal and mechanical bonding, yet the metal or metal alloy layer can enable usage at a high temperature such as would be desired for SiC, GaN, or diamond (e.g., wide bandgap devices). Furthermore, significant application of pressure to form the densified layers is not required, as would be the case with micrometer sized particles.
    Type: Application
    Filed: February 14, 2005
    Publication date: August 9, 2007
    Inventors: Guo-Quan Lu, Guofeng Bai, Jesus Calata, Zhiye Zhang
  • Publication number: 20050127134
    Abstract: Methods of attaching high-temperature electrical components to substrates are provided. The methods involve of attachment of high-temperature components to substrates via a nano-metal film.
    Type: Application
    Filed: September 15, 2004
    Publication date: June 16, 2005
    Inventors: Guo-Quan Lu, Zhiye Zhang, Jesus Calata, Guofeng Bai, Yanjing Liu, Bryan Koene, Paige Phillips
  • Patent number: 6442033
    Abstract: Resistance and parasitic inductance resulting from interconnection of semiconductor chips in power modules are reduced to negligible levels by a robust structure which completely avoids use of wire bonds through use of ball bonding and flip-chip manufacturing processes, possibly in combination with chip scale packaging and hourglass shaped stacked solder bumps of increased compliance and controlled height/shape. Turn-off voltage overshoot is reduced to about one-half or less than a comparable wire bond packaged power module. Hourglass shaped solder bumps provide increased compliance and reliability over much increased numbers of thermal cycles over wide temperature excursions.
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: August 27, 2002
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Xingsheng Liu, Guo-Quan Lu
  • Publication number: 20020030276
    Abstract: A conductive layer having a plurality dimples is provided for interconnecting a power device chip and a driver circuit for driving and controlling the power device chip within a power module. A plurality of concave-shaped dimples of the conductive layer form an electrical contact with the power device chip, and at least one convex-shaped dimple of the conductive layer forms an electrical contact with the driver circuit. Optionally, a group of through-holes are formed around each of the dimples.
    Type: Application
    Filed: April 11, 2001
    Publication date: March 14, 2002
    Inventors: Guo-Quan Lu, Simon Sihua Wen
  • Patent number: 5864459
    Abstract: Processes for providing a durable glass dielectric layer on an electrically conductive substrate are disclosed. Also disclosed are electrostatic chucks made by the process that include an electrically conductive substrate coated with a layer of glass having a composition that includes 60 wt. % to 80 wt. % SiO.sub.2.
    Type: Grant
    Filed: August 14, 1996
    Date of Patent: January 26, 1999
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Guo-Quan Lu, Jaecheol Bang
  • Patent number: 5855676
    Abstract: Tubelining device and technique using a coating-applicator for slip-casting a fluent liner coating onto the internal surface of a tube.
    Type: Grant
    Filed: May 1, 1997
    Date of Patent: January 5, 1999
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Guo-Quan Lu, Jesus N. Calata