Patents by Inventor Christopher C. Chang

Christopher C. Chang 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: 20040023047
    Abstract: A corrosion resistant component of semiconductor processing equipment such as a plasma chamber comprises zirconia toughened ceramic material as an outermost surface of the component. The component can be made entirely of the ceramic material or the ceramic material can be provided as a coating on a substrate such as aluminum or aluminum alloy, stainless steel, or refractory metal. The zirconia toughened ceramic can be tetragonal zirconia polycrystalline (TZP) material, partially-stabilized zirconia (PSZ), or a zirconia dispersion toughened ceramic (ZTC) such as zirconia-toughened alumina (tetragonal zirconia particles dispersed in Al2O3). In the case of a ceramic zirconia toughened coating, one or more intermediate layers may be provided between the component and the ceramic coating. To promote adhesion of the ceramic coating, the component surface or the intermediate layer surface may be subjected to a surface roughening treatment prior to depositing the ceramic coating.
    Type: Application
    Filed: May 22, 2003
    Publication date: February 5, 2004
    Inventors: Robert J. O'Donnell, Christopher C. Chang, John E. Daugherty
  • Patent number: 6620520
    Abstract: A corrosion resistant component of semiconductor processing equipment such as a plasma chamber comprises zirconia toughened ceramic material as an outermost surface of the component. The component can be made entirely of the ceramic material or the ceramic material can be provided as a coating on a substrate such as aluminum or aluminum alloy, stainless steel, or refractory metal. The zirconia toughened ceramic can be tetragonal zirconia polycrystalline (TZP) material, partially-stabilized zirconia (PSZ), or a zirconia dispersion toughened ceramic (ZTC) such as zirconia-toughened alumina (tetragonal zirconia particles dispersed in Al2O3). In the case of a ceramic zirconia toughened coating, one or more intermediate layers may be provided between the component and the ceramic coating. To promote adhesion of the ceramic coating, the component surface or the intermediate layer surface may be subjected to a surface roughening treatment prior to depositing the ceramic coating.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: September 16, 2003
    Assignee: Lam Research Corporation
    Inventors: Robert J. O'Donnell, Christopher C. Chang, John E. Daugherty
  • Patent number: 6613442
    Abstract: A corrosion resistant component of semiconductor processing equipment such as a plasma chamber includes a boron nitride/yttria composite containing surface and process for manufacture thereof.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: September 2, 2003
    Assignee: Lam Research Corporation
    Inventors: Robert J. O'Donnell, John E. Daugherty, Christopher C. Chang
  • Patent number: 6537429
    Abstract: A corrosion resistant component of semiconductor processing equipment such as a plasma chamber includes a diamond containing surface and process for manufacture thereof.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: March 25, 2003
    Assignee: Lam Research Corporation
    Inventors: Robert J. O'Donnell, John E. Daugherty, Christopher C. Chang
  • Patent number: 6533910
    Abstract: A corrosion resistant component of semiconductor processing equipment such as a plasma chamber includes a carbonitride containing surface and process for manufacture thereof.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: March 18, 2003
    Assignee: Lam Research Corporation
    Inventors: Robert J. O'Donnell, John E. Daugherty, Christopher C. Chang
  • Publication number: 20020094378
    Abstract: A corrosion resistant component of semiconductor processing equipment such as a plasma chamber includes a carbonitride containing surface and process for manufacture thereof.
    Type: Application
    Filed: December 29, 2000
    Publication date: July 18, 2002
    Inventors: Robert J. O'Donnell, John E. Daugherty, Christopher C. Chang
  • Publication number: 20020086501
    Abstract: A corrosion resistant component of semiconductor processing equipment such as a plasma chamber includes a diamond containing surface and process for manufacture thereof.
    Type: Application
    Filed: December 29, 2000
    Publication date: July 4, 2002
    Inventors: Robert J. O'Donnell, John E. Daugherty, Christopher C. Chang
  • Publication number: 20020086553
    Abstract: A corrosion resistant component of semiconductor processing equipment such as a plasma chamber includes a fullerene containing surface and process for manufacturing thereof.
    Type: Application
    Filed: December 29, 2000
    Publication date: July 4, 2002
    Inventors: Robert J. O'Donnell, Christopher C. Chang, John E. Daugherty
  • Publication number: 20020086545
    Abstract: A corrosion resistant component of a plasma chamber includes a liquid crystalline polymer. In a preferred embodiment, the liquid crystalline polymer (LCP) is provided on an aluminum component having an anodized or non-anodized surface. The liquid crystalline polymer can also be provided on an alumina component. The liquid crystalline polymer can be deposited by a method such as plasma spraying. The liquid crystalline polymer may also be provided as a preformed sheet or other shape adapted to cover the exposed surfaces of the reaction chamber. Additionally, the reactor components may be made entirely from liquid crystalline polymer by machining the component from a solid block of liquid crystalline polymer or molding the component from the polymer. The liquid crystalline polymer may contain reinforcing fillers such as glass or mineral fillers.
    Type: Application
    Filed: December 29, 2000
    Publication date: July 4, 2002
    Inventors: Robert J. O'Donnell, Christopher C. Chang, John E. Daugherty
  • Publication number: 20020086118
    Abstract: Components for use in plasma processing chambers having plasma exposed surfaces with surface roughness characteristics that promote polymer adhesion. The roughened surfaces are formed by plasma spraying a coating material such as a ceramic or high temperature polymer onto the surface of the component. The plasma sprayed components of the present invention can be used for plasma reactor components having surfaces exposed to the plasma during processing. Suitable components include chamber walls, chamber liners, baffle rings, gas distribution plates, plasma confinement rings, and liner supports. By improving polymer adhesion, the plasma sprayed component surfaces can reduce the levels of particle contamination in the process chamber thereby improving yields and reducing down-time required for cleaning and/or replacing chamber components.
    Type: Application
    Filed: December 29, 2000
    Publication date: July 4, 2002
    Inventors: Christopher C. Chang, Robert J. Steger
  • Publication number: 20020086554
    Abstract: A corrosion resistant component of semiconductor processing equipment such as a plasma chamber includes a boron nitride/yttria composite containing surface and process for manufacture thereof.
    Type: Application
    Filed: December 29, 2000
    Publication date: July 4, 2002
    Inventors: Robert J. O'Donnell, John E. Daugherty, Christopher C. Chang
  • Publication number: 20020086153
    Abstract: A corrosion resistant component of semiconductor processing equipment such as a plasma chamber comprises zirconia toughened ceramic material as an outermost surface of the component. The component can be made entirely of the ceramic material or the ceramic material can be provided as a coating on a substrate such as aluminum or aluminum alloy, stainless steel, or refractory metal. The zirconia toughened ceramic can be tetragonal zirconia polycrystalline (TZP) material, partially-stabilized zirconia (PSZ), or a zirconia dispersion toughened ceramic (ZTC) such as zirconia-toughened alumina (tetragonal zirconia particles dispersed in Al2O3). In the case of a ceramic zirconia toughened coating, one or more intermediate layers may be provided between the component and the ceramic coating. To promote adhesion of the ceramic coating, the component surface or the intermediate layer surface may be subjected to a surface roughening treatment prior to depositing the ceramic coating.
    Type: Application
    Filed: December 29, 2000
    Publication date: July 4, 2002
    Inventors: Robert J. O'Donnell, Christopher C. Chang, John E. Daugherty