Abstract: A test board includes an insulating part provided to face a semiconductor device when the semiconductor device is mounted on the test board, a sloped connection hole formed in the insulating part for accepting a projection electrode when the semiconductor device is mounted on the test board, and a conductive part formed in the insulating part so as to be in contact with and electrically connected to the projection electrode. When the semiconductor device is mounted on the test board, the semiconductor device or the projection electrode is supported by the insulating part.

Abstract: An electrical connecting device and related method of testing a semiconductor device which provides for testing of a semiconductor device under excellent and stable current transfer characteristics. Moreover, the electrical connecting device is easily produced under mass production conditions and can be made with a structure for testing of a semiconductor device where there are many pins arranged in a fine pitch on the semiconductor device. The electrical connector device includes a contactor which has a coil-shaped spring and a transformable conductive member extending in the compressing direction of the coil-shaped spring. When one end of the conductive member is in contact with a first electrode and the other end of the conductive members in contact with the second electrode, the contactor electrically connects between the first electrode and the second electrode via the conductive member and generates contact pressure against the electrodes when the coil-shaped spring is pressed.