Patents by Inventor Xiangdong Feng

Xiangdong Feng 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: 20050003744
    Abstract: The present invention provides a method of synthesizing nanosized abrasive particles and methods of using the same in chemical mechanical polishing slurry applications. The nanosized abrasive particles according to the invention are produced by hydrothermal synthesis. The crystallites of the particles include cerium atoms and atoms of metals other than cerium. In a preferred embodiment of the invention, the crystallites exhibit a cubic crystal lattice structure. The differences in electric potential between the cerium atoms and the atoms of metals other than cerium facilitate the polishing of films without the need for chemical oxidizers.
    Type: Application
    Filed: May 21, 2004
    Publication date: January 6, 2005
    Applicant: Ferro Corporation
    Inventors: Xiangdong Feng, Yie-Shein Her, Yun Mao
  • Patent number: 6818030
    Abstract: The present invention provides a process for producing particles suitable for use as abrasives in chemical-mechanical polishing slurries. The process according to the invention includes mixing at least one crystallization promoter such as Ti[OCH(CH3)2)]4 with at least one cerium compound and at least one solvent, and subjecting said mixture to hydrothermal treatment at a temperature of from about 60° C. to about 700° C. to produce the particles. Particles formed in accordance with the present invention exhibit a large crystallite size, and can be used to polish silicon-containing substrates to a high degree of planarity at a relatively high rate.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: November 16, 2004
    Assignee: Ferro Corporation
    Inventors: Xiangdong Feng, Yie-Shein Her
  • Patent number: 6596042
    Abstract: The present invention provides a process for producing particles suitable for use as abrasives in chemical-mechanical polishing slurries. The process according to the invention includes adding a crystallization promoter such as Ti[OCH(CH3)2)]4 to an aqueous cerium salt solution, adjusting the pH of the solution to higher than 7.0 using one or more bases, and subjecting the solution to hydrothermal treatment at a temperature of from about 90° C. to about 500° C. to produce the particles.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: July 22, 2003
    Assignee: Ferro Corporation
    Inventors: Xiangdong Feng, Yie-Shein Her
  • Publication number: 20030093957
    Abstract: The present invention provides a process for producing particles suitable for use as abrasives in chemical-mechanical polishing slurries. The process according to the invention includes mixing at least one crystallization promoter such as Ti[OCH(CH3)2)]4 with at least one cerium compound and at least one solvent, and subjecting said mixture to hydrothermal treatment at a temperature of from about 60° C. to about 700° C. to produce the particles. Particles formed in accordance with the present invention exhibit a large crystallite size, and can be used to polish silicon-containing substrates to a high degree of planarity at a relatively high rate.
    Type: Application
    Filed: September 25, 2002
    Publication date: May 22, 2003
    Applicant: Ferro Corporation
    Inventors: Xiangdong Feng, Yie-Shein Her
  • Patent number: 6533840
    Abstract: The present invention is a microchannel mass exchanger having a first plurality of inner thin sheets and a second plurality of outer thin sheets. The inner thin sheets each have a solid margin around a circumference, the solid margin defining a slot through the inner thin sheet thickness. The outer thin sheets each have at least two header holes on opposite ends and when sandwiching an inner thin sheet. The outer thin sheets further have a mass exchange medium. The assembly forms a closed flow channel assembly wherein fluid enters through one of the header holes into the slot and exits through another of the header holes after contacting the mass exchange medium.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: March 18, 2003
    Assignee: Battelle Memorial Institute
    Inventors: Peter M. Martin, Wendy D. Bennett, Dean W. Matson, Donald C. Stewart, Monte K. Drost, Robert S. Wegeng, Joseph M. Perez, Xiangdong Feng, Jun Liu
  • Publication number: 20030029193
    Abstract: The present invention provides a method of forming a coating including a metalloxane polymer on a substrate. The method according to the invention includes forming a non-aqueous mixture including an alkoxide, a siloxane, and an organo-metallic catalyst, applying the mixture to the substrate, and heating the substrate to cure the coating. The mixture can also comprise one or more fillers including ceramic powders, glass powders, metal powders, and pigments The method can be used to apply coatings to metal, glass, porcelain enamel, ceramic, and polymeric substrates.
    Type: Application
    Filed: June 8, 2001
    Publication date: February 13, 2003
    Inventors: Xiangdong Feng, Wei Zhang, Charles A. Baldwin, William D. Faust, Graham B. Rose
  • Publication number: 20020059869
    Abstract: The present invention is a microchannel mass exchanger having a first plurality of inner thin sheets and a second plurality of outer thin sheets. The inner thin sheets each have a solid margin around a circumference, the solid margin defining a slot through the inner thin sheet thickness. The outer thin sheets each have at least two header holes on opposite ends and when sandwiching an inner thin sheet. The outer thin sheets further have a mass exchange medium. The assembly forms a closed flow channel assembly wherein fluid enters through one of the header holes into the slot and exits through another of the header holes after contacting the mass exchange medium.
    Type: Application
    Filed: November 13, 2001
    Publication date: May 23, 2002
    Inventors: Peter M. Martin, Wendy D. Bennett, Dean W. Matson, Donald C. Stewart, Monte K. Drost, Robert S. Wegeng, Joseph M. Perez, Xiangdong Feng, Jun Liu
  • Patent number: 6352577
    Abstract: The present invention is a microchannel mass exchanger having a first plurality of inner thin sheets and a second plurality of outer thin sheets. The inner thin sheets each have a solid margin around a circumference, the solid margin defining a slot through the inner thin sheet thickness. The outer thin sheets each have at least two header holes on opposite ends and when sandwiching an inner thin sheet. The outer thin sheets further have a mass exchange medium. The assembly forms a closed flow channel assembly wherein fluid enters through one of the header holes into the slot and exits through another of the header holes after contacting the mass exchange medium.
    Type: Grant
    Filed: May 3, 2000
    Date of Patent: March 5, 2002
    Assignee: Battelle Memorial Institute
    Inventors: Peter M. Martin, Wendy D. Bennett, Dean W. Matson, Donald C. Stewart, Monte K. Drost, Robert S. Wegeng, Joseph M. Perez, Xiangdong Feng, Jun Liu
  • Patent number: 6326326
    Abstract: According to the present invention, an organized assembly of functional molecules with specific interfacial functionality (functional group(s)) is attached to available surfaces including within mesopores of a mesoporous material. The method of the present invention avoids the standard base soak that would digest the walls between the mesopores by boiling the mesoporous material in water for surface preparation then removing all but one or two layers of water molecules on the internal surface of a pore. Suitable functional molecule precursor is then applied to permeate the hydrated pores and the precursor then undergoes condensation to form the functional molecules on the interior surface(s) of the pore(s).
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: December 4, 2001
    Assignee: Battelle Memorial Institute
    Inventors: Xiangdong Feng, Jun Liu, Glen E. Fryxell
  • Patent number: 6270903
    Abstract: A simple and effective method to bond a thin coating of poly(N-isopropylacylamide) (NIPAAm) on a glass surface by UV photopolymerization, and the use of such a coated surface in nano and micro technology applications. A silane coupling agent with a dithiocarbamate group is provided as a photosensitizer preferably, (N,N′-diethylamine) dithiocarbamoylpropyl-(trimethoxy) silane (DATMS). The thiocarbamate group of the sensitizer is then bonded to the glass surface by coupling the silane agent with the hydroxyl groups on the glass surface. The modified surface is then exposed to a solution of NIPAAm and a crosslinking agent which may be any organic molecule having an acrylamide group and at least two double bonds in its structure, such as N, N′-methylenebisacrylamide, and a polar solvent which may be any polar liquid which will dissolve the monomer and the crosslinking agent such as acetone, water, ethanol, or combinations thereof.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: August 7, 2001
    Assignee: Battelle Memorial Institute
    Inventors: Xiangdong Feng, Jun Liu, Liang Liang
  • Patent number: 6129973
    Abstract: The present invention is a microchannel mass exchanger having a first plurality of inner thin sheets and a second plurality of outer thin sheets. The inner thin sheets each have a solid margin around a circumference, the solid margin defining a slot through the inner thin sheet thickness. The outer thin sheets each have at least two header holes on opposite ends and when sandwiching an inner thin sheet. The outer thin sheets further have a mass exchange medium. The assembly forms a closed flow channel assembly wherein fluid enters through one of the header holes into the slot and exits through another of the header holes after contacting the mass exchange medium.
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: October 10, 2000
    Assignee: Battelle Memorial Institute
    Inventors: Peter M. Martin, Wendy D. Bennett, Dean W. Matson, Donald C. Stewart, Monte K. Drost, Robert S. Wegeng, Joseph M. Perez, Xiangdong Feng, Jun Liu
  • Patent number: 5997961
    Abstract: A simple and effective method to bond a thin coating of poly(N-isopropylacylamide) (NIPAAm) on a glass surface by UV photopolymerization, and the use of such a coated surface in nano and micro technology applications. A silane coupling agent with a dithiocarbamate group is provided as a photosensitizer, preferably, (N,N'-diethylamine)dithiocarbamoylpropyl-(trimethoxy)silane (DATMS). The thiocarbamate group of the sensitizer is then bonded to the glass surface by coupling the silane agent with the hydroxyl groups on the glass surface. The modified surface is then exposed to a solution of NIPAAm and a crosslinking agent which may be any organic molecule having an acrylamide group and at least two double bonds in its structure, such as N,N'-methylenebisacrylamide, and a polar solvent which may be any polar liquid which will dissolve the monomer and the crosslinking agent such as acetone, water, ethanol, or combinations thereof.
    Type: Grant
    Filed: March 6, 1998
    Date of Patent: December 7, 1999
    Assignee: Battelle Memorial Institute
    Inventors: Xiangdong Feng, Jun Liu, Liang Liang
  • Patent number: 5656009
    Abstract: Disclosed is a method for converting spent nuclear fuel and surplus plutonium into a vitreous ceramic final waste form wherein spent nuclear fuel is bound in a crystalline matrix which is in turn bound within glass.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: August 12, 1997
    Assignee: Battelle Memorial Institute
    Inventors: Xiangdong Feng, Robert E. Einziger
  • Patent number: 5597516
    Abstract: Disclosed is a method for converting spent nuclear fuel and surplus plutonium into a vitreous ceramic final waste form wherein spent nuclear fuel is bound in a crystalline matrix which is in turn bound within glass.
    Type: Grant
    Filed: August 11, 1995
    Date of Patent: January 28, 1997
    Assignee: Battelle Memorial Institute
    Inventors: Xiangdong Feng, Robert E. Einziger