Patents Assigned to GEM Service, Inc.
  • Publication number: 20120181676
    Abstract: Embodiments of the present invention relate to the use of stamping to form features on a lead frame of a semiconductor device package. In one embodiment, portions of the lead frame such as pins are moved out of the horizontal plane of a diepad by stamping. In certain embodiments, indentations or a complex cross-sectional profile, such as chamfered, may be imparted to portions of the pins and/or diepad by stamping. The complexity offered by such a stamped cross-sectional profile serves to enhance mechanical interlocking of the lead frame within the plastic molding of the package body. Other techniques such as selective electroplating and/or formation of a brown oxide guard band to limit spreading of adhesive material during die attach, may be employed alone or in combination to facilitate fabrication of a package having such stamped features.
    Type: Application
    Filed: January 11, 2012
    Publication date: July 19, 2012
    Applicant: GEM Service, Inc.
    Inventors: Anthony C. Tsui, Hongbo Yang, Ming Zhou, Weibing Chu, Anthony Chia