Patents by Inventor Johnny Cham

Johnny Cham 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: 6701199
    Abstract: In accordance with the objectives of the invention a new methodology is provided that assures that integrated process results are verified and assured prior to the installation of processing tools as part of modifying or updating of a semiconductor manufacturing foundry. The complete semiconductor manufacturing complement of processing tools is sub-divided into short-loops or sub-modules, which are then combined into a full loop. This combination of sub-modules into modules that closer approach a full complement of processing tools can be accomplished in a gradual manner, whereby one or more sub-loops are first combined and evaluated, to this combination one or more additional sub-groups may be added whereby each of these latter sub-groups may also have been created by combining one or more (original) sub-loops. This process is continued to the point where a full complement of process equipment has been created, completing the full processing loops of the semiconductor manufacturing facility.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: March 2, 2004
    Assignee: Chartered Semiconductor Manufactoring Ltd.
    Inventors: Cheng Chor Shu, Cho Nam Hoon, Leong Chee Kong, Pete Benyon, Johnny Cham, George Wong, Neoh Soon Ee
  • Publication number: 20040039472
    Abstract: In accordance with the objectives of the invention a new methodology is provided that assures that integrated process results are verified and assured prior to the installation of processing tools as part of modifying or updating of a semiconductor manufacturing foundry. The complete semiconductor manufacturing complement of processing tools is sub-divided into short-loops or sub-modules, which are then combined into a full loop. This combination of sub-modules into modules that closer approach a full complement of processing tools can be accomplished in a gradual manner, whereby one or more sub-loops are first combined and evaluated, to this combination one or more additional sub-groups may be added whereby each of these latter sub-groups may also have been created by combining one or more (original) sub-loops. This process is continued to the point where a full complement of process equipment has been created, completing the full processing loops of the semiconductor manufacturing facility.
    Type: Application
    Filed: August 22, 2002
    Publication date: February 26, 2004
    Applicant: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Cheng Chor Shu, Cho Nam Hoon, Leong Chee Kong, Peter Benyon, Johnny Cham, George Wong, Neoh Soon Ee
  • Patent number: 6517235
    Abstract: A method for controlling and/or calibrating rapid thermal process systems is described. One or more wafers comprising a silicon semiconductor substrate having a refractory metal layer thereon are silicided in a RTP system at different temperatures. Sheet resistance uniformity of the wafer is measured thereby detecting silicidation phase transition temperature points at the highest uniformity points. The temperature points are used to calibrate or to reset the RTP system. A plurality of wafers comprising a silicon semiconductor substrate having a refractory metal layer thereon can be silicided in each of a plurality of rapid thermal process systems. Sheet resistance uniformity of each of the wafers is measured thereby detecting silicidation phase transition temperature points by highest sheet resistance uniformity for each of the RTP systems. The temperature points are used to match temperatures for each of the RTP systems.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: February 11, 2003
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Zhong Yun Zhu, Rajneesh Jaiswal, Haznita Abd Karim, Bei Chao Zhang, Johnny Cham, Ravi Sankar Yelamanchi, Chee Kong Leong
  • Publication number: 20020191668
    Abstract: A method for controlling and/or calibrating rapid thermal process systems is described. One or more wafers comprising a silicon semiconductor substrate having a refractory metal layer thereon are silicided in a RTP system at different temperatures. Sheet resistance uniformity of the wafer is measured thereby detecting silicidation phase transition temperature points at the highest uniformity points. The temperature points are used to calibrate or to reset the RTP system. A plurality of wafers comprising a silicon semiconductor substrate having a refractory metal layer thereon can be silicided in each of a plurality of rapid thermal process systems. Sheet resistance uniformity of each of the wafers is measured thereby detecting silicidation phase transition temperature points by highest sheet resistance uniformity for each of the RTP systems. The temperature points are used to match temperatures for each of the RTP systems.
    Type: Application
    Filed: May 31, 2001
    Publication date: December 19, 2002
    Inventors: Zhong-Yun Zhu, Rajneesh Jaiswal, Haznita Abd Karim, Bei Chao Zhang, Johnny Cham, Ravi Sankar Yelamanchi, Chee Kong Leong