Patents by Inventor Lijun Yao

Lijun Yao 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: 20240009797
    Abstract: The present invention relates to B24B, and more specifically, the present invention relates to an endpoint detection window, a chemical mechanical polishing pad with a window and a preparation method thereof. A side surface of the window is provided with a plurality of circumferential grooves. In the present invention, a column-shaped window with a specially designed side surface structure is provided and subjected to integrated pouring and molding with a polishing pad to manufacture a chemical mechanical polishing pad having high bonding strength between the window and the polishing pad. As a side surface of the window is of a multi-groove structure, not only is the bonding contact area between the window and the pad increased, but also a convex structure is formed by a polishing pad body material poured into the grooves so as to form an embedded bonding manner with a groove structure of a window material.
    Type: Application
    Filed: July 5, 2023
    Publication date: January 11, 2024
    Inventors: Hongqi XIANG, Jianguo SHI, Kai CHEN, Lijun YAO
  • Publication number: 20040166693
    Abstract: The invention described herein relates to new titanium-comprising materials which can be utilized for forming titanium alloy sputtering targets. The titanium alloy sputtering targets can be reactively sputtered in a nitrogen-comprising sputtering atmosphere to form an alloy TiN film, or alternatively in a nitrogen-comprising and oxygen-comprising sputtering atmosphere to form an alloy TiON thin film. The thin films formed in accordance with the present invention can have a non-columnar grain structure, low electrical resistivity, high chemical stability, and barrier layer properties comparable to those of TaN for thin film Cu barrier applications. Further, the titanium alloy sputtering target materials produced in accordance with the present invention are more cost-effective for semiconductor applications than are high-purity tantalum materials and have superior mechanical strength suitable for high-power sputtering applications.
    Type: Application
    Filed: February 19, 2004
    Publication date: August 26, 2004
    Inventors: Jianxing Li, Stephen Turner, Lijun Yao
  • Publication number: 20040164420
    Abstract: The invention described herein relates to new titanium-comprising materials which can be utilized for forming titanium alloy sputtering targets. The titanium alloy sputtering targets can be reactively sputtered in a nitrogen-comprising sputtering atmosphere to form an alloy TiN film, or alternatively in a nitrogen-comprising and oxygen-comprising sputtering atmosphere to form an alloy TiON thin film. The thin films formed in accordance with the present invention can have a non-columnar grain structure, low electrical resistivity, high chemical stability, and barrier layer properties comparable to those of TaN for thin film Cu barrier applications. Further, the titanium alloy sputtering target materials produced in accordance with the present invention are more cost-effective for semiconductor applications than are high-purity tantalum materials and have superior mechanical strength suitable for high-power sputtering applications.
    Type: Application
    Filed: February 19, 2004
    Publication date: August 26, 2004
    Inventors: Jianxing Li, Stephen Turner, Lijun Yao
  • Patent number: 6746553
    Abstract: The invention includes methods of reducing grain sizes of materials, and methods of forming sputtering targets. The invention includes a method for producing a sputtering target material in which a metallic material is subjected to plastic working at a processing percentage of at least 5% and a processing rate of at least 100%/second. In particular applications the metallic material comprises one or more of aluminum, copper and titanium.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: June 8, 2004
    Assignee: Honeywell International Inc.
    Inventors: Lijun Yao, Tadao Ueda
  • Publication number: 20030227068
    Abstract: The invention describes herein relates to new titanium-comprising materials which can be utilized for forming titanium alloy sputtering targets. The titanium alloy sputtering targets can be reactively sputtered in a nitrogen-comprising sputtering atmosphere to form an alloy TiN film, or alternatively in a nitrogen-comprising and oxygen-comprising sputtering atmosphere to form an alloy TiON thin film. The thin films formed in accordance with the present invention can have a non-columnar grain structure, low electrical resistivity, high chemical stability, and barrier layer properties comparable to those of TaN for thin film Cu barrier applications. Further, the titanium alloy sputtering target materials produced in accordance with the present invention are more cost-effective for semiconductor applications than are high-purity tantalum materials and have superior mechanical strength suitable for high-power sputtering applications.
    Type: Application
    Filed: November 26, 2002
    Publication date: December 11, 2003
    Inventors: Jianxing Li, Stephen Turner, Lijun Yao
  • Publication number: 20020189728
    Abstract: The invention includes methods of reducing grain sizes of materials, and methods of forming sputtering targets. The invention includes a method for producing a sputtering target material in which a metallic material is subjected to plastic working at a processing percentage of at least 5% and a processing rate of at least 100%/second. In particular applications the metallic material comprises one or more of aluminum, copper and titanium.
    Type: Application
    Filed: June 7, 2002
    Publication date: December 19, 2002
    Applicant: Honeywell International Inc.
    Inventors: Lijun Yao, Tadao Ueda
  • Patent number: 6428638
    Abstract: The invention includes methods of reducing grain sizes of materials, and methods of forming sputtering targets. The invention includes a method for producing a sputtering target material in which a metallic material is subjected to plastic working at a processing percentage of at least 5% and a processing rate of at least 100%/second. In particular applications the metallic material comprises one or more of aluminum, copper and titanium.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: August 6, 2002
    Assignee: Honeywell International Inc.
    Inventors: Lijun Yao, Tadao Ueda
  • Patent number: 6423161
    Abstract: The invention includes a material containing aluminum grains which have an average grain size of less than 20 &mgr;m. The material contains manganese, with a total non-aluminum content of 0.01 to 10.0% by weight. The material is preferably used as a sputtering target. A sputtering target is produced by subjecting the material to plastic working at a processing percentage of at least 5% at a processing rate of at least 100%/second.
    Type: Grant
    Filed: July 28, 2000
    Date of Patent: July 23, 2002
    Assignee: Honeywell International Inc.
    Inventors: Lijun Yao, Tadao Ueda
  • Patent number: 6416595
    Abstract: A titanium material with titanium grains, wherein the average crystal grain size is less than 4 &mgr;m. The material is at least 99.99% (4N purity) titanium. The alloy is especially useful as a sputtering target. The material is produced by processing the material with plastic working of at least 5% at a rate of at least 100%/second.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: July 9, 2002
    Assignee: Honeywell International Inc.
    Inventors: Lijun Yao, Tadao Ueda
  • Publication number: 20010015242
    Abstract: The invention includes methods of reducing grain sizes of materials, and methods of forming sputtering targets. The invention includes a method for producing a sputtering target material in which a metallic material is subjected to plastic working at a processing percentage of at least 5% and a processing rate of at least 100%/second. In particular applications the metallic material comprises one or more of aluminum, copper and titanium.
    Type: Application
    Filed: April 9, 2001
    Publication date: August 23, 2001
    Inventors: Lijun Yao, Tadao Ueda
  • Publication number: 20010015246
    Abstract: The invention includes methods of reducing grain sizes of materials, and methods of forming sputtering targets. The invention includes a method for producing a sputtering target material in which a metallic material is subjected to plastic working at a processing percentage of at least 5% and a processing rate of at least 100%/second. In particular applications the metallic material comprises one or more of aluminum, copper and titanium.
    Type: Application
    Filed: April 10, 2001
    Publication date: August 23, 2001
    Inventors: Lijun Yao, Tadao Ueda