Patents by Inventor Tosio Ohno

Tosio Ohno 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: 5631573
    Abstract: A probe-type test handler includes a measurement module for performing electrical characteristic tests on an IC, a performance board electrically connected to the measurement module in an interchangeable manner that allows the type of the performance board to be selected according to the type of the IC to be measured, a probe card having a probe needle connected to the performance board, and a pressure mechanism that allows the tip of the linear portion of the probe needle to be pressed into contact with the lead projected out of the IC package near its IC package body. A test method using the test handler is also disclosed.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: May 20, 1997
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Tosio Ohno