Patents by Inventor Sum Kai Wah

Sum Kai Wah 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: 6718608
    Abstract: A method is provided for package-to-package conversion of a pick and place handler. An input arm assembly is provided with interchangeable vacuum leads. An input/output shuttle plate is provided comprising a block and base plate. The block has a plurality of pocket groupings and a two or more alignment hole groupings. The base plate has two or more alignment pins. Package-to-package conversion is achieved by changing alignment hole groupings on the alignment pins, thereby selecting the pocket corresponding to the alignment hole used. A soak plate is provided having an array of pocket groupings, wherein each pocket grouping has the same pattern of different size/shape pockets to accommodate different packages. Package-to-package conversion is accomplished by programming an offset to the desired pocket in each pocket grouping. A test arm assembly is provided with interchangeable vacuum leads and interchangeable nest pieces.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: April 13, 2004
    Assignee: St Assembly Test Services Pte LTD
    Inventors: Sum Kai Wah, Tan Wee Boon, Yap Liop Jin
  • Publication number: 20030140475
    Abstract: The present invention provides a kit and method for package-to-package conversion of a pick and place handler. An input arm assembly is provided with interchangeable vacuum leads such that package-to-package conversion only requires replacing the vacuum lead with a different size vacuum lead. An input/output shuttle plate is provided comprising a block and base plate. The block has a plurality of pocket groupings and a two or more alignment hole groupings. The base plate has two or more alignment pins. Package-to-package conversion is achieved by changing which alignment hole in each alignment hole grouping is set on the alignment pins, thereby selecting the pocket in each pocket grouping corresponding to the alignment hole used. A soak plate is provided having an array of pocket groupings, wherein each pocket grouping has the same pattern of different size/shape pockets to accommodate different packages.
    Type: Application
    Filed: January 22, 2002
    Publication date: July 31, 2003
    Applicant: St Assembly Test Services Pte Ltd
    Inventors: Sum Kai Wah, Tan Wee Boon, Yao Liop Jin