Patents by Inventor Chenggang Xie

Chenggang Xie 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: 5601966
    Abstract: A method is provided for fabricating a display cathode which includes forming a conductive line adjacent a face of a substrate. A region of amorphic diamond is formed adjacent a selected portion of the conductive line.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 11, 1997
    Assignee: Microelectronics and Computer Technology Corporation
    Inventors: Nalin Kumar, Chenggang Xie
  • Patent number: 5600200
    Abstract: A field emission cathode for use in flat panel displays comprises a layer of conductive material and a layer of amorphic diamond film, functioning as a low effective work-function material, deposited over the conductive material to form emission sites. The emission sites each contain at least two sub-regions having differing electron affinities. The cathode may be used to form a computer screen or a fluorescent light source.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 4, 1997
    Assignee: Microelectronics and Computer Technology Corporation
    Inventors: Nalin Kumar, Chenggang Xie
  • Patent number: 5551903
    Abstract: A field emission cathode is provided which includes a substrate and a conductive layer disposed adjacent the substrate. An electrically resistive pillar is disposed adjacent the conductive layer, the resistive pillar having a substantially flat surface spaced from and substantially parallel to the substrate. A layer of diamond is disposed adjacent the flat surface of the resistive pillar.
    Type: Grant
    Filed: October 19, 1994
    Date of Patent: September 3, 1996
    Assignee: Microelectronics and Computer Technology
    Inventors: Nalin Kumar, Chenggang Xie
  • Patent number: 5548185
    Abstract: A flat panel display of a field emission type having a triode (three terminal) structure and useful as a device for displaying visual information is disclosed. The display includes a plurality of corresponding light-emitting anodes and field-emission cathodes, each of the anodes emitting light in response to emission from each of the corresponding cathodes, each of the cathodes including a layer of low work function material having a relatively flat emission surface which includes a plurality of distributed localized electron emission sites and a grid assembly positioned between the corresponding anodes and cathodes to thereby control emission levels to the anodes from the corresponding cathodes. In the preferred embodiment of the invention, the layer of low work function material is amorphic diamond film.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: August 20, 1996
    Assignee: Microelectronics and Computer Technology Corporation
    Inventors: Nalin Kumar, Chenggang Xie
  • Patent number: 5543684
    Abstract: A field emission cathode is provided which includes a substrate and a conductive layer disposed adjacent the substrate. An electrically resistive pillar is disposed adjacent the conductive layer, the resistive pillar having a substantially flat surface spaced from and substantially parallel to the substrate. A layer of diamond is disposed adjacent the surface of the resistive pillar.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: August 6, 1996
    Assignee: Microelectronics and Computer Technology Corporation
    Inventors: Nalin Kumar, Chenggang Xie
  • Patent number: 5531880
    Abstract: A system and method for producing thin, uniform powder phosphors for field emission display screens wherein a planarization of the phosphor powder layer is accomplished by placing the deposited phosphor layer in an anode plate between two optical flats, which are then mounted within a mechanical press.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: July 2, 1996
    Assignees: Microelectronics and Computer Technology Corporation, SI Diamond Technology, Incorporated
    Inventors: Chenggang Xie, Donald E. Patterson, Nalin Kumar
  • Patent number: 5528099
    Abstract: Lateral luminescent field emitter devices for use in flat panel displays and a method of manufacturing are described. The device comprises a flat substrate, an anode disposed on the substrate, and a cathode disposed on the substrate, the cathode providing an electron emission surface capable of emitting electrons laterally across a gap to a major portion of an adjacent surface of the anode.
    Type: Grant
    Filed: January 26, 1995
    Date of Patent: June 18, 1996
    Assignee: Microelectronics and Computer Technology Corporation
    Inventors: Chenggang Xie, Nalin Kumar
  • Patent number: 5449970
    Abstract: A matrix-addressed diode flat panel display of field emission type is described, utilizing a diode (two terminal) pixel structure. The flat panel display includes a cathode assembly having a plurality of cathodes, each cathode including a layer of cathode conductive material and a layer of a low effective work-function material deposited over the cathode conductive material and an anode assembly having a plurality of anodes, each anode including a layer of anode conductive material and a layer of cathodoluminescent material deposited over the anode conductive material, the anode assembly located proximate the cathode assembly to thereby receive charged particle emissions from the cathode assembly, the cathodoluminescent material emitting light in response to the charged particle emissions.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: September 12, 1995
    Assignee: Microelectronics and Computer Technology Corporation
    Inventors: Nalin Kumar, Chenggang Xie
  • Patent number: 5445550
    Abstract: Lateral luminescent field emitter devices for use in flat panel displays and a method of manufacturing are described. The device comprises a flat substrate, an anode disposed on the substrate, and a cathode disposed on the substrate, the cathode providing an electron emission surface capable of emitting electrons laterally across a gap to a major portion of an adjacent surface of the anode.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: August 29, 1995
    Inventors: Chenggang Xie, Nalin Kumar
  • Patent number: 5331172
    Abstract: Ionized metal cluster beam deposition of metal bumps on substrates such as multi-chip modules and integrated circuit chips is enhanced. The present invention discloses wet etching techniques for removing unwanted metal deposited on the substrate around bumps, multiple sources for depositing alloyed (tin-lead) bumps with constant composition, and single or multiple sources for directing a cluster beam through an aperture to deposit metal on a substrate and directing an ion beam at the aperture to remove metal deposited therein.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: July 19, 1994
    Assignees: Microelectronics and Computer Technology Corporation, Hughes Aircraft Company
    Inventors: Nalin Kumar, Chenggang Xie, Rama R. Goruganthu, Mohammed K. Ghazi
  • Patent number: 5290732
    Abstract: Ionized metal cluster beam deposition of metal bumps on substrates such as multi-chip modules and integrated circuit chips is enhanced. The present invention discloses wet etching techniques for removing unwanted metal deposited on the substrate around bumps, and multiple sources for depositing alloyed (tin-lead) bumps with constant composition.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: March 1, 1994
    Assignees: Microelectronics And Computer Technology Corporation, Hughes Aircraft Company
    Inventors: Nalin Kumar, Chenggang Xie, Rama R. Goruganthu, Mohammed K. Ghazi