Patents by Inventor Wee Boon Tan

Wee Boon Tan 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: 7076861
    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: Grant
    Filed: December 22, 2003
    Date of Patent: July 18, 2006
    Assignee: St Assembly Test Services Pte.
    Inventors: Kai Wah Sum, Wee Boon Tan, Liop Jin Yap
  • Publication number: 20040134054
    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: December 22, 2003
    Publication date: July 15, 2004
    Applicant: ST ASSEMBLY TEST SERVICES PTE LTD
    Inventors: Kai Wah Sum, Wee Boon Tan, Liop Jin Yap
  • Patent number: 6300781
    Abstract: An arrangement of three plates where the top plate interfaces with the BGA device, the center plate has a structure of channels or openings which is matched with the size and ball pitch of the BGA device that is being handled while the bottom plate interfaces with the tester or target plate. A plurality of center plates is provided to match and equal the plurality of BGA devices that is handled in the BGA testing or BGA semiconductor-manufacturing environment.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: October 9, 2001
    Assignee: ST Assembly Test Services PTE Ltd
    Inventors: Liop Jin Yap, Wee Boon Tan, Chee-Keong Tan