Patents Assigned to Toho Electronics, Inc.
  • Apparatus for testing and producing semiconductor chips and integrated circuits
    Patent number: 5446624
    Abstract: A probe board is provided with a guide-mask system. The probe board has at least one head which passes through a respective guide-hole located on the filmed guide-mask. The utilization of this guide-mask has the advantage of minimizing slipping of probe heads out of respective mating test terminals of IC chips. Additionally, the utilization of this guide-mask provides accurate probe head positioning and provides enforcement to the heads by way of the filmed guide-mask because of the precise support holes provided in the masks.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: August 29, 1995
    Assignee: Toho Electronics, Inc.
    Inventor: Kimiyoshi Saito