Patents by Inventor Yaomin Xia

Yaomin Xia 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: 8334657
    Abstract: A RF matching network is described, and which includes a 1st to nth RF generators, and wherein each RF generator has a different frequency, and wherein the frequencies of the 1st to the nth RF input ports decline in sequence, and wherein between the ith frequency RF input port, and the output port is a ith circuit, which has a high impedance at the output port to all RF generator frequencies other than the ith frequency; and wherein the ith circuit, when connected to a RF generator with the ith frequency, and wherein measuring from the output port to the ith circuit, the ith circuit has a first impedance at the ith frequency; and when measuring from the output port in the opposite direction to the ith circuit, the ith circuit has a second impedance at the ith frequency; and wherein the first impedance is a substantial conjugate match of the second impedance.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: December 18, 2012
    Assignees: Advanced Micro-Fabrication Equipment Inc. Asia
    Inventor: Yaomin Xia
  • Publication number: 20120298302
    Abstract: A process plasma chamber for processing a wafer may include a chamber body for processing the wafer, a wafer chuck for positioning the wafer within the chamber body and a plasma body being generated by RF power in the chamber body. The wafer chuck may position the wafer downwards and above the plasma body. The chamber body may include a showerhead positioned below the plasma body. The chamber body may include a first top electrode for receiving RF power. The chamber body may include a second top electrode for receiving RF power.
    Type: Application
    Filed: May 13, 2012
    Publication date: November 29, 2012
    Inventors: Yaomin Xia, Shang-Fen Ren, Benxin Xia
  • Publication number: 20110309748
    Abstract: A RF matching network is described, and which includes a 1st to nth RF generators, and wherein each RF generator has a different frequency, and wherein the frequencies of the 1st to the nth RF input ports decline in sequence, and wherein between the ith frequency RF input port, and the output port is a ith circuit, which has a high impedance at the output port to all RF generator frequencies other than the ith frequency; and wherein the ith circuit, when connected to a RF generator with the ith frequency, and wherein measuring from the output port to the ith circuit, the ith circuit has a first impedance at the ith frequency; and when measuring from the output port in the opposite direction to the ith circuit, the ith circuit has a second impedance at the ith frequency; and wherein the first impedance is a substantial conjugate match of the second impedance.
    Type: Application
    Filed: January 10, 2011
    Publication date: December 22, 2011
    Inventor: Yaomin Xia
  • Patent number: 7868556
    Abstract: A RF matching network is described, and which includes a 1st to nth RF generators, and wherein each RF generator has a different frequency, and wherein the frequencies of the 1st to the nth RF input ports decline in sequence, and wherein between the ith frequency RF input port, and the output port is a ith circuit, which has a high impedance at the output port to all RF generator frequencies other than the ith frequency; and wherein the ith circuit, when connected to a RF generator with the ith frequency, and wherein measuring from the output port to the ith circuit, the ith circuit has a first impedance at the ith frequency; and when measuring from the output port in the opposite direction to the ith circuit, the ith circuit has a second impedance at the ith frequency; and wherein the first impedance is a substantial conjugate match of the second impedance.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: January 11, 2011
    Assignee: Advanced Micro-Fabrication Equipment, Inc. Asia
    Inventor: Yaomin Xia
  • Patent number: 7682483
    Abstract: A vacuum processing chamber and method of using a vacuum processing chamber are described and which includes a chamber defined by a chamber body, and wherein the chamber body defines an internal cavity; first and second electrodes are mounted in the internal cavity as defined by the chamber body; an RF generator is provided, and which produces single or multiple frequencies and which is electrically coupled to at least one of the first or second electrodes, and which are operable, when energized, to produce a plasma within the internal cavity of the chamber body; and an adjustable component borne by the chamber body, and which is fabricated, at least in part, from a dielectric material, and which selectively adjusts the equivalent dielectric constant which exists between the chamber body and the first electrode.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: March 23, 2010
    Assignee: Advanced Micro-Fabrication Equipment, Inc. Asia
    Inventor: Yaomin Xia
  • Publication number: 20070039165
    Abstract: A vacuum processing chamber and method of using a vacuum processing chamber are described and which includes a chamber defined by a chamber body, and wherein the chamber body defines an internal cavity; first and second electrodes are mounted in the internal cavity as defined by the chamber body; an RF generator is provided, and which produces single or multiple frequencies and which is electrically coupled to at least one of the first or second electrodes, and which are operable, when energized, to produce a plasma within the internal cavity of the chamber body; and an adjustable component borne by the chamber body, and which is fabricated, at least in part, from a dielectric material, and which selectively adjusts the equivalent dielectric constant which exists between the chamber body and the first electrode.
    Type: Application
    Filed: May 24, 2006
    Publication date: February 22, 2007
    Inventor: Yaomin Xia
  • Publication number: 20070030091
    Abstract: A RF matching network is described, and which includes a 1st to nth RF generators, and wherein each RF generator has a different frequency, and wherein the frequencies of the 1st to the nth RF input ports decline in sequence, and wherein between the ith frequency RF input port, and the output port is a ith circuit, which has a high impedance at the output port to all RF generator frequencies other than the ith frequency; and wherein the ith circuit, when connected to a RF generator with the ith frequency, and wherein measuring from the output port to the ith circuit, the ith circuit has a first impedance at the ith frequency; and when measuring from the output port in the opposite direction to the ith circuit, the ith circuit has a second impedance at the ith frequency; and wherein the first impedance is a substantial conjugate match of the second impedance.
    Type: Application
    Filed: February 8, 2006
    Publication date: February 8, 2007
    Inventor: Yaomin Xia
  • Patent number: 6712996
    Abstract: The invention relates to temperature indicating compositions which display temperature dependent color changes. The invention encompasses temperature indicating compositions, materials, devices and methods of their use. The temperature indicating compositions of the invention are clays that can be used to detect temperature and temperature changes at sub-ambient and particularly sub-zero ° C. temperatures. Temperature of a selected environment can be monitored by placing a temperature-sensitive composition comprising the clay material of this invention in contact with that environment and monitoring the color of the composition.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: March 30, 2004
    Inventors: Jun Wu, Yaomin Xia, Joseph W. Stucki
  • Publication number: 20020055578
    Abstract: The invention relates to temperature indicating compositions which display temperature dependent color changes. The invention encompasses temperature indicating compositions, materials, devices and methods of their use. The temperature indicating compositions of the invention are clays that can be used to detect temperature and temperature changes at sub-ambient and particularly sub-zero ° C. temperatures. Temperature of a selected environment can be monitored by placing a temperature-sensitive composition comprising the clay material of this invention in contact with that environment and monitoring the color of the composition.
    Type: Application
    Filed: June 19, 2001
    Publication date: May 9, 2002
    Inventors: Jun Wu, Yaomin Xia, Joseph W. Stucki