Patents by Inventor Biao Wu

Biao Wu 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: 7364625
    Abstract: Described are methods of rinsing and processing devices such as semiconductor wafers wherein the device is rinsed with using a surface tension reducing agent; the method may include a subsequent drying step which preferably incorporates the use of a surface tension reducing agent during at least partial drying; and the method may be performed using automated rinsing equipment; also described are automated rinsing apparatuses useful with the method.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: April 29, 2008
    Assignee: FSI International, Inc.
    Inventors: Kurt K. Christenson, Steven L. Nelson, James R. Oikari, Jeff F. Olson, Biao Wu
  • Publication number: 20030087532
    Abstract: The present invention provides integrated systems and methods for carrying out manufacturing steps relating to etching, photoresist stripping and optionally, particle removal. More specifically, the present invention provides integrated systems and methods which may be utilized to etch oxide with subsequent removal of photoresist using BOE solutions that are desirably blended on-line. Advantageously, systems and methods embodying features of the present invention include a single process chamber so that cycle time and individual step processing time are reduced, further resulting in increased productivity of the systems and methods.
    Type: Application
    Filed: November 1, 2001
    Publication date: May 8, 2003
    Inventors: Biao Wu, Erik David Olson, Ramkumar Krishnaswamy, Eugene Smith
  • Publication number: 20020170573
    Abstract: Described are methods of rinsing and processing devices such as semiconductor wafers wherein the device is rinsed with using a surface tension reducing agent; the method may include a subsequent drying step which preferably incorporates the use of a surface tension reducing agent during at least partial drying; and the method may be performed using automated rinsing equipment; also described are automated rinsing apparatuses useful with the method.
    Type: Application
    Filed: May 20, 2002
    Publication date: November 21, 2002
    Inventors: Kurt K. Christenson, Steven L. Nelson, James R. Oikari, Jeff F. Olson, Biao Wu
  • Publication number: 20020127859
    Abstract: The present invention provides methods for selectively stripping polysilicon-containing films from oxide surfaces using an etching composition including a fluoride ion source and an oxidant. The etching composition exhibits a high degree of selectivity between polysilicon and oxide, such that the underlying oxide surface or film layer acts as a stop layer, thereby protecting the underlying substrate from the etching composition. Furthermore, the etching composition is effective at substantially at ambient temperature, thereby avoiding the potential safety concerns that may arise when chemicals are heated in manufacturing situations.
    Type: Application
    Filed: May 6, 2002
    Publication date: September 12, 2002
    Inventor: Biao Wu
  • Patent number: 6329299
    Abstract: The present invention provides methods for selectively stripping tantalum-containing films from oxide surfaces using an etching composition including a fluoride ion source and an acidic oxidant. The etching composition exhibits a high degree of selectivity between tantalum-containing films and oxide films, such that the underlying oxide surface or film layer acts as a stop layer, thereby protecting the underlying substrate from the etching composition. Furthermore, the etching composition is effective at substantially at ambient temperature, thereby avoiding the potential safety concerns that may arise when chemicals are heated in manufacturing situations. Finally, in certain preferred embodiments, the etching composition may further comprise a non-acidic oxidant. In these embodiments of the invention the etching composition is useful to reclaim wafers having at least a portion of the wafer substrate exposed, eg., wafers bearing film stacks comprising TEOS.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: December 11, 2001
    Assignee: FSI International, Inc.
    Inventors: Biao Wu, Boyd J. Wiedenman