Patents by Inventor Zhizhang Chen

Zhizhang Chen 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: 7491595
    Abstract: An integrated circuit (IC) includes a high voltage first-conductivity type field effect transistor (HV-first-conductivity FET) and a high voltage second-type field effect transistor (HV-second-conductivity FET). The HV first-conductivity FET has a second-conductivity-well and a field oxide formed over the second-conductivity-well to define an active area. A first-conductivity-well is formed in at least a portion of the active area, wherein the first-conductivity-well is formed to have the capability to operate as a first-conductivity-drift portion of the HV-first-conductivity FET. The HV second-conductivity FET has a first-conductivity-well and a field oxide formed over the first-conductivity-well to define an active area. A channel stop region is formed in at least a portion of the active area, wherein the channel stop region is formed to have the capability to operate as second-conductivity-drift portions of the HV-second-conductivity FET.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: February 17, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Chin Huang, Jeff Hintzman, James Weaver, Zhizhang Chen
  • Publication number: 20090032812
    Abstract: A microelectronic device includes a thin film transistor having an oxide semiconductor channel and an organic polymer passivation layer formed on the oxide semiconductor channel.
    Type: Application
    Filed: July 31, 2007
    Publication date: February 5, 2009
    Inventors: Gregory Herman, Benjamin Clark, Zhizhang Chen
  • Patent number: 7422962
    Abstract: A method of singulating electronic devices, including aligning a saw blade over a lid street disposed on a lid substrate that is disposed over a device substrate. An electronic device that includes a bond pad is disposed on the device substrate, wherein the lid street is disposed over the bond pad. In addition, the method also includes sawing partially through the lid street to form a trench in the lid street. The trench includes a trench bottom in the lid substrate.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: September 9, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Chien-Hua Chen, Zhizhang Chen, Steven R Geissler
  • Patent number: 7382512
    Abstract: Various devices and methods employing a resistive phase change material are disclosed.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: June 3, 2008
    Inventors: Zhizhang Chen, Qin Liu, Timothy F. Myers, Chien-Hua Chen
  • Publication number: 20080100534
    Abstract: An imaging apparatus and method include a pixel and a two point switching element.
    Type: Application
    Filed: October 26, 2006
    Publication date: May 1, 2008
    Inventors: Randy K. Rannow, Zhizhang Chen, James W. Stasiak, Stanley J. Wang
  • Publication number: 20070254405
    Abstract: This invention relates to a semiconductor having protruding contacts comprising, a first semiconductor substrate having at least one interconnect located substantially within the first substrate, and a second semiconductor substrate having at least one protruding contact point that substantially contacts at least one interconnect.
    Type: Application
    Filed: July 16, 2007
    Publication date: November 1, 2007
    Inventors: Chien-Hua Chen, Zhizhang Chen, Neal Meyer
  • Patent number: 7262495
    Abstract: This invention relates to a semiconductor having protruding contacts comprising, a first semiconductor substrate having at least one interconnect located substantially within the first substrate, and a second semiconductor substrate having at least one protruding contact point that substantially contacts at least one interconnect.
    Type: Grant
    Filed: October 7, 2004
    Date of Patent: August 28, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Chien-Hua Chen, Zhizhang Chen, Neal W. Meyer
  • Patent number: 7239544
    Abstract: An electrical memory component is provided, comprising read/write probes and a chalcogenide storage media. Each read/write probe is adapted for selective electrical connection to a memory portion of the chalcogenide storage media and for performing read and write operations upon the memory portion. The chalcogenide storage media has a second plurality of memory portions, and is movably mounted relative to the first plurality of read/write probes for selective electrical connection of the read/write probes to a subset of the memory portions.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: July 3, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Zhizhang Chen, Lori Tully, Hang Liao, Robert N. Bicknell
  • Publication number: 20070089492
    Abstract: Various devices and methods employing a resistive phase change material are disclosed.
    Type: Application
    Filed: October 26, 2005
    Publication date: April 26, 2007
    Inventors: Zhizhang Chen, Qin Liu, Timothy Myers, Chien-Hua Chen
  • Patent number: 7179678
    Abstract: A method of processing a type III–VI semiconductor material on a silicon substrate to improve minority carrier diffusion length and EBIC response is provided. The semiconductor material is heated to a temperature in the range of 300° C.–600° C. for a period in the range of 20 seconds to 60 minutes in an atmosphere having a composition of 0–10% of hydrogen in nitrogen.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: February 20, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Zhizhang Chen, Hang Liao, David M. Schut, Michael Setera
  • Publication number: 20070010052
    Abstract: An integrated circuit (IC) includes a high voltage first-conductivity type field effect transistor (HV-first-conductivity FET) and a high voltage second-type field effect transistor (HV-second-conductivity FET). The HV first-conductivity FET has a second-conductivity-well and a field oxide formed over the second-conductivity-well to define an active area. A first-conductivity-well is formed in at least a portion of the active area, wherein the first-conductivity-well is formed to have the capability to operate as a first-conductivity-drift portion of the HV-first-conductivity FET. The HV second-conductivity FET has a first-conductivity-well and a field oxide formed over the first-conductivity-well to define an active area. A channel stop region I s formed in at least a portion of the active area, wherein the channel stop region is formed to have the capability to operate as second-conductivity-drift portions of the HV-second-conductivity FET.
    Type: Application
    Filed: July 6, 2005
    Publication date: January 11, 2007
    Inventors: Chin Huang, Jeff Hintzman, James Weaver, Zhizhang Chen
  • Patent number: 7158281
    Abstract: A MEMS device includes at least one movable member and an active device having at least one property affected by the location of the movable member with respect to the active device. A control circuit is used to limit movement of the movable member based on observation of the property affected by the active device.
    Type: Grant
    Filed: April 5, 2006
    Date of Patent: January 2, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Zhizhang Chen, Hang Liao, Sriram Ramamoorthi, Timothy F. Myers
  • Patent number: 7148621
    Abstract: A method for creating an electron lens includes the steps of applying a polymer layer on an emitter surface of an electron emitter and then curing the polymer layer to reduce volatile content.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: December 12, 2006
    Assignee: Hewlett-Packard Development Company, LP.
    Inventors: Zhizhang Chen, Ronald L. Enck, Sriram Ramamoorthi, Qin Liu
  • Publication number: 20060245034
    Abstract: A MEMS device includes at least one movable member and an active device having at least one property affected by the location of the movable member with respect to the active device. A control circuit is used to limit movement of the movable member based on observation of the property affected by the active device.
    Type: Application
    Filed: April 5, 2006
    Publication date: November 2, 2006
    Inventors: Zhizhang Chen, Hang Liao, Sriram Ramamoorthi, Timothy Myers
  • Publication number: 20060164009
    Abstract: A vacuum device, including a substrate and a support structure having a support perimeter, where the support structure is disposed over the substrate. In addition, the vacuum device also includes a non-evaporable getter layer having an exposed surface area. The non-evaporable getter layer is disposed over the support structure, and extends beyond the support perimeter, in at least one direction, of the support structure forming a vacuum gap between the substrate and the non-evaporable getter layer increasing the exposed surface area.
    Type: Application
    Filed: March 22, 2006
    Publication date: July 27, 2006
    Inventors: Sriram Ramamoorthi, Zhizhang Chen, John Liebeskind, Ronald Enck, Jennifer Shih
  • Patent number: 7078855
    Abstract: A light device includes an electron supply defining an emitter surface. A dielectric tunneling layer is disposed between the electron supply and a cathode layer. The cathode layer has at least partial photon transparency that is substantially uniform across the emitter surface.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: July 18, 2006
    Inventors: Zhizhang Chen, Sriram Ramamoorthi, Terry E McMahon, Timothy F. Myers
  • Patent number: 7061660
    Abstract: A MEMS device includes at least one movable member and an active device having at least one property affected by the location of the movable member with respect to the active device. A control circuit is used to limit movement of the movable member based on observation of the property affected by the active device.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: June 13, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Zhizhang Chen, Hang Liao, Sriram Ramamoorthi, Timothy F. Myers
  • Patent number: 7049158
    Abstract: A method is disclosed for creating an emitter having a flat cathode emission surface: First a protective layer that is conductive is formed on the flat cathode emission surface. Then an electronic lens structure is created over the protective layer. Finally, the protective layer is etched to expose the flat cathode emission surface.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: May 23, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Zhizhang Chen, Paul J. Benning, Sriram Ramamoorthi, Thomas Novet
  • Patent number: 7044823
    Abstract: An emitter has an electron supply layer and a tunneling layer formed on the electron supply layer. Optionally, an insulator layer is formed on the electron supply layer and has openings defined within in which the tunneling layer is formed. A cathode layer is formed on the tunneling layer to provide a surface for energy emissions of electrons and/or photons. Preferably, the emitter is subjected to an annealing process thereby increasing the supply of electrons tunneled from the electron supply layer to the cathode layer.
    Type: Grant
    Filed: May 18, 2004
    Date of Patent: May 16, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Zhizhang Chen, Michael J. Regan, Brian E Bolf, Thomas Novet, Paul J. Benning, Mark Alan Johnstone, Sriram Ramamoorthi
  • Patent number: 7045958
    Abstract: A vacuum device, including a substrate and a support structure having a support perimeter, where the support structure is disposed over the substrate. In addition, the vacuum device also includes a non-evaporable getter layer having an exposed surface area. The non-evaporable getter layer is disposed over the support structure, and extends beyond the support perimeter, in at least one direction, of the support structure forming a vacuum gap between the substrate and the non-evaporable getter layer increasing the exposed surface area.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: May 16, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Sriram Ramamoorthi, Zhizhang Chen, John Liebeskind, Ronald L. Enck, Jennifer Shih