Patents by Inventor Yang Cheng Hung

Yang Cheng Hung 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: 7730898
    Abstract: A novel semiconductor wafer lifter is disclosed for handling wafers during wet bench processing. In particular, the lifter has a plurality of holes formed in its vertical support surface to allow cleaning or rinsing fluid to flow through the vertical support instead of around its sides. These holes facilitates a constant flow of fluid across the wafer during recirculation of the tank contents during etching and rinsing operations, thus ensuring more even etching of all wafers and minimizing the deposition of particulate matter on wafer surfaces.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: June 8, 2010
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Yang Cheng Hung, Kuo Liang Lu, Tseng Wen Song, Chen Peir Horng