Patents by Inventor Kok Chan

Kok Chan 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: 6891231
    Abstract: A diffusion barrier (and method for forming the diffusion barrier) for a field-effect transistor having a channel region and a gate electrode, includes an insulating material being disposed over the channel region. The insulating material includes nitrogen (N), and is disposed under the gate electrode. The insulating material can be provided either as a layer or distributed within a gate dielectric material disposed under the gate electrode.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: May 10, 2005
    Assignee: International Business Machines Corporation
    Inventors: Nestor Alexander Bojarczuk, Jr., Kevin Kok Chan, Christopher Peter D'Emic, Evgeni Gousev, Supratik Guha, Paul C. Jamison, Lars-Ake Ragnarsson
  • Patent number: 6870232
    Abstract: A field effect transistor and method for making is described incorporating self aligned source and drain contacts with Schottky metal-to-semiconductor junction and a T-shaped gate or incorporating highly doped semiconductor material for the source and drain contacts different from the channel material to provide etch selectivity and a T-shaped gate or incorporating a metal for the source and drain contacts and the oxide of the metal for the gate dielectric which is self aligned.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: March 22, 2005
    Assignee: International Business Machines Corporation
    Inventors: Kevin Kok Chan, Jack Oon Chu, Khalid EzzEldin Ismail, Stephen Anthony Rishton, Katherine Lynn Saenger
  • Publication number: 20040164373
    Abstract: A structure, and a method for fabricating the structure, for the isolation of electronic devices is disclosed. The electronic devices are processed in substrates comprising a SiGe based layer underneath a strained Si layer. The isolation structure comprises a trench extending downward from the substrate top surface and penetrating into the SiGe based layer, forming a sidewall in the substrate. An epitaxial Si liner is selectively deposited onto the trench sidewall, and subsequently thermally oxidized. The trench is filled with a trench dielectric, which protrudes above the substrate top surface.
    Type: Application
    Filed: February 25, 2003
    Publication date: August 26, 2004
    Inventors: Steven John Koester, Klaus Dietrich Beyer, Michael John Hargrove, Kern Rim, Kevin Kok Chan
  • Patent number: 6724449
    Abstract: A liquid crystal display device includes a first substrate, a dry alignment film deposited over the substrate, a second substrate coupled to the first substrate with the dry alignment film deposited over the second substrate therebetween and forming a cell gap, and a liquid crystal material formed in the cell gap. The dry alignment film allows for a truly vertical alignment of molecules of the liquid crystal material such that the molecules form an angle of substantially 90° relative to the substrate. The dry alignment film can be an oxide layer, a nitride layer, an oxynitride layer or a silicon layer. This dry alignment layer can be treated to form a tilted homeotropic alignment, such that the liquid crystal molecules have a pretilt angle of 0.5 to 10 degrees from a substrate normal direction.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: April 20, 2004
    Assignee: International Business Machines Corporation
    Inventors: Paul Stephen Andry, Chen Cai, Kevin Kok Chan, Praveen Chaudhari, James Patrick Doyle, Eileen Ann Galligan, Richard Allen John, James Andrew Lacey, Shui-Chih Alan Lien
  • Patent number: 6716708
    Abstract: A method (and resultant structure) for forming a metal silicide contact on a silicon-containing region having controlled consumption of said silicon-containing region, includes implanting Ge into the silicon-containing region, forming a blanket metal-silicon mixture layer over the silicon-containing region, reacting the metal-silicon mixture with silicon at a first temperature to form a metal silicon alloy, etching unreacted portions of the metal-silicon mixture layer, forming a blanket silicon layer over the metal silicon alloy layer, annealing at a second temperature to form an alloy of metal-Si2, and selectively etching the unreacted silicon layer.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: April 6, 2004
    Assignee: International Business Machines Corporation
    Inventors: Cyril Cabral, Jr., Kevin Kok Chan, Guy Moshe Cohen, Kathryn Wilder Guarini, Christian Lavoie, Ronnen Andrew Roy, Paul Michael Solomon
  • Publication number: 20030132487
    Abstract: A method (and resultant structure) for forming a metal silicide contact on a silicon-containing region having controlled consumption of said silicon-containing region, includes implanting Ge into the silicon-containing region, forming a blanket metal-silicon mixture layer over the silicon-containing region, reacting the metal-silicon mixture with silicon at a first temperature to form a metal silicon alloy, etching unreacted portions of the metal-silicon mixture layer, forming a blanket silicon layer over the metal silicon alloy layer, annealing at a second temperature to form an alloy of metal-Si2, and selectively etching the unreacted silicon layer.
    Type: Application
    Filed: November 20, 2002
    Publication date: July 17, 2003
    Applicant: International Business Machines Corporation
    Inventors: Cyril Cabral, Kevin Kok Chan, Guy Moshe Cohen, Kathryn Wilder Guarini, Christian Lavoie, Ronnen Andrew Roy, Paul Michael Solomon
  • Patent number: 6555880
    Abstract: A semiconductor structure includes raised source and drain regions, where the raised source and drain regions are facet free and unconstrained to have a shape conforming to a same crystallographic axes with respect to each other.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: April 29, 2003
    Assignee: International Business Machines Corporation
    Inventors: Cyril Cabral, Jr., Kevin Kok Chan, Guy Moshe Cohen, Kathryn Wilder Guarini, Christian Lavoie, Ronnen Andrew Roy, Paul Michael Solomon
  • Publication number: 20030068883
    Abstract: A method of forming a semiconductor substrate (and resultant structure), includes providing a semiconductor substrate to be silicided including a source and drain formed therein on respective sides of a gate, depositing a metal film over the gate, source and drain regions, reacting the metal film with Si at a first predetermined temperature, to form a metal-silicon alloy, etching the unreacted metal, depositing a silicon film over the source drain and gate regions, annealing the substrate at a second predetermined temperature, to form a metal-Si2 alloy, and selectively etching the unreacted Si.
    Type: Application
    Filed: November 5, 2002
    Publication date: April 10, 2003
    Applicant: International Business Machines Corporation
    Inventors: Atul Champaklal Ajmera, Cyril Cabral, Roy Arthur Carruthers, Kevin Kok Chan, Guy Moshe Cohen, Paul Michael Kozlowski, Christian Lavoie, Joseph Scott Newbury, Ronnen Andrew Roy
  • Patent number: 6503833
    Abstract: A method of forming a semiconductor substrate (and resultant structure), includes providing a semiconductor substrate to be silicided including a source and drain formed therein on respective sides of a gate, depositing a metal film over the gate, source and drain regions, reacting the metal film with Si at a first predetermined temperature, to form a metal-silicon alloy, etching the unreacted metal, depositing a silicon film over the source drain and gate regions, annealing the substrate at a second predetermined temperature, to form a metal-Si2 alloy, and selectively etching the unreacted Si.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: January 7, 2003
    Assignee: International Business Machines Corporation
    Inventors: Atul Champaklal Ajmera, Cyril Cabral, Jr., Roy Arthur Carruthers, Kevin Kok Chan, Guy Moshe Cohen, Paul Michael Kozlowski, Christian Lavoie, Joseph Scott Newbury, Ronnen Andrew Roy
  • Publication number: 20020190302
    Abstract: A diffusion barrier (and method for forming the diffusion barrier) for a field-effect transistor having a channel region and a gate electrode, includes an insulating material being disposed over the channel region. The insulating material includes nitrogen (N), and is disposed under the gate electrode. The insulating material can be provided either as a layer or distributed within a gate dielectric material disposed under the gate electrode.
    Type: Application
    Filed: June 13, 2001
    Publication date: December 19, 2002
    Applicant: International business Machines Corporation
    Inventors: Alexander Bojarczuk, Kevin Kok Chan, Christopher Peter D'Emic, Evgeni Gousev, Supratik Guha, Paul C. Jamison, Lars-Ake Ragnarsson
  • Publication number: 20020185691
    Abstract: A method (and resultant structure) for forming a metal silicide contact on a silicon-containing region having controlled consumption of said silicon-containing region, includes implanting Ge into the silicon-containing region, forming a blanket metal-silicon mixture layer over the silicon-containing region, reacting the metal-silicon mixture with silicon at a first temperature to form a metal silicon alloy, etching unreacted portions of the metal-silicon mixture layer, forming a blanket silicon layer over the metal silicon alloy layer, annealing at a second temperature to form an alloy of metal-Si2, and selectively etching the unreacted silicon layer.
    Type: Application
    Filed: June 7, 2001
    Publication date: December 12, 2002
    Applicant: International Business Machines Corporation
    Inventors: Cyril Cabral, Kevin Kok Chan, Guy Moshe Cohen, Kathryn Wilder Guarini, Christian Lavoie, Ronnen Andrew Roy, Paul Michael Solomon
  • Publication number: 20020031909
    Abstract: A silicide processing method for a thin film SOI device including depositing a metal or an alloy on a gate and a source/drain structure formed in a silicon-on-insulator film, reacting the metal or alloy at a first temperature with the silicon-on-insulator film to form a first alloy, etching the unreacted layer of the metal (or alloy) selectively, depositing a Si film on the first alloy, reacting the Si film at a second temperature to form a second alloy, and etching the unreacted layer of the Si film selectively.
    Type: Application
    Filed: May 11, 2000
    Publication date: March 14, 2002
    Inventors: Cyril Cabral, Kevin Kok Chan, Guy Moshe Cohen, Christian Lavoie, Ronnen Andrew Roy, Paul Michael Solomon
  • Publication number: 20020022366
    Abstract: A method (and resulting structure) for fabricating a silicide for a semiconductor device, includes depositing a metal or an alloy thereof on a silicon substrate, reacting the metal or the alloy to form a first silicide phase, etching any unreacted metal, depositing a silicon cap layer over the first silicide phase, reacting the silicon cap layer to form a second silicide phase, for the semiconductor device, and etching any unreacted silicon. The substrate can be either a silicon-on-insulator (SOI) substrate or a bulk silicon substrate.
    Type: Application
    Filed: July 11, 2001
    Publication date: February 21, 2002
    Applicant: International Business Machines Corporation
    Inventors: Cyril Cabral, Kevin Kok Chan, Guy Moshe Cohen, Christian Lavoie, Ronnen Andrew Roy, Paul Michael Solomon
  • Patent number: 6281551
    Abstract: A back-plane for a semiconductor device, includes an oxidized substrate, a metal film formed on the oxidized substrate forming a back-gate, a back-gate oxide formed on the back-gate, and a silicon layer formed on the back-gate oxide.
    Type: Grant
    Filed: August 9, 1999
    Date of Patent: August 28, 2001
    Assignee: International Business Machines Corporation
    Inventors: Kevin Kok Chan, Christopher Peter D'Emic, Erin Catherine Jones, Paul Michael Solomon, Sandip Tiwari
  • Patent number: 6236060
    Abstract: A light emitting device is disclosed comprising a bottom layer of electrically conductive material. A block of electrically insulating material is disposed on the bottom layer. At least a portion of the block is optically transparent. A top layer of electrically conductive material is disposed on the block. A plurality of discrete nano-crystals of a material selected from the group consisting of Group IV, Group III-V, and Group II-VI is disposed within the block, and are thereby electrically insulated from the top and bottom layers. Also provided are bottom and top electrodes connected to the bottom and top layers, respectively, for applying a voltage therebetween.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: May 22, 2001
    Assignee: International Business Machines Corporation
    Inventors: Kevin Kok Chan, Sandip Tiwari
  • Patent number: 6096590
    Abstract: A field effect transistor and method for making is described incorporating self aligned source and drain contacts with Schottky metal-to-semiconductor junction and a T-shaped gate or incorporating highly doped semiconductor material for the source and drain contacts different from the channel material to provide etch selectivity and a T-shaped gate or incorporating a metal for the source and drain contacts and the oxide of the metal for the gate dielectric which is self aligned. The invention overcomes the problem of self-aligned high resistance source/drain contacts and a high resistance gate electrode for submicron FET devices which increase as devices are scaled to smaller dimensions.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: August 1, 2000
    Assignee: International Business Machines Corporation
    Inventors: Kevin Kok Chan, Jack Oon Chu, Khalid EzzEldin Ismail, Stephen Anthony Rishton, Katherine Lynn Saenger
  • Patent number: 6057212
    Abstract: A method of forming a semiconductor structure, includes steps of growing an oxide layer on a substrate to form a first wafer, separately forming a metal film on an oxidized substrate to form a second wafer, attaching the first and second wafers, performing a heat cycle for the first and second wafers to form a bond between the first and second wafers, and detaching a portion of the first wafer from the second wafer. Thus, a device, such as a back-plane for a semiconductor device, formed by the method includes an oxidized substrate, a metal film formed on the oxidized substrate forming a back-gate, a back-gate oxide formed on the back-gate, and a silicon layer formed on the back-gate oxide.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: May 2, 2000
    Assignee: International Business Machines Corporation
    Inventors: Kevin Kok Chan, Christopher Peter D'Emic, Erin Catherine Jones, Paul Michael Solomon, Sandip Tiwari