Patents by Inventor Jeng-Cheng A. Chen

Jeng-Cheng A. Chen 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).

  • Electrical flame-off wand
    Patent number: 5628922
    Abstract: A electrical flame-off (EFO) wand 200 for emitting an electrical discharge to form a length of bonding wire into a ball comprising a stainless steel tube mounting section 305 for mounting, a platinum rod electrode 315 inserted partially into the tube 305 and secured with electrically conductive epoxy 310. The dimensions of EFO wand 200 allows the capillary 110 to be positioned close to the die-lead frame assembly, improving the productivity of the bonding process and providing economical, good quality and more reliable wire bonding.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: May 13, 1997
    Assignee: Motorola, Inc.
    Inventor: Jeng-Cheng A. Chen