Patents by Inventor C. S. Chen

C. S. 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).

  • Transfer molding process using self-straightening alignment pins
    Patent number: 5833909
    Abstract: A leadframe loading frame with self-straightening alignment pins. A leadframe loading frame is provided with leadframe alignment pins that are made of a shape memory alloy. The pins are also superelastic. The use of the pins results in elimination of the bent alignment pin package defects that occurred when using the leadframe loading frames of the prior art. Other devices, systems and methods are also described.
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: November 10, 1998
    Assignee: Texas Instruments Incorporated
    Inventors: C. S. Chen, Sherman Cheng, C. Y. Tseng, C. S. Fong
  • Air exhaust mold plunger
    Patent number: 5626887
    Abstract: A plunger (22), used in a standard mold, has a vent seal device (23) and spring (24) that evacuates air through an exhaust port 26a, and channels 26 and 26b from the mold prior to moving the mold compound into the runner 27.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: May 6, 1997
    Assignee: Texas Instruments Incorporated
    Inventors: C. H. Chou, T. H. Wang, C. S. Chen
  • Compressible mold plunger
    Patent number: 5520874
    Abstract: A plunger (22), used in a standard mold, has a movable piston (23) and spring (24) that reduce the cull space when piston (23) is pressed downward into the cull mold compound.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: May 28, 1996
    Assignee: Texas Instruments Incorporated
    Inventors: C. H. Chou, T. H. Wang, C. S. Chen, Y. C. Chen, S. P. Ko