Patent ID: 7221176
Filing Date: 2007-05-22
Classification: G01R

Abstract:
1. A vacuum prober for testing electrical characteristics of an object to be tested in a vacuum environment while each of a plurality of contacts are in contact with predetermined electrodes of the object to be tested, the vacuum prober comprising: a prober main body having a prober chamber; a recessed chamber arranged in the prober chamber of the prober main body; a table which is arranged in the recessed chamber and upon which an object to be tested is placed; a lower camera arranged either inside or outside the recessed chamber; an upper camera arranged at one of a position outside the recessed chamber and a position to oppose an interior of the recessed chamber; and a moving mechanism of the lower camera configured to move the lower camera, wherein the lower camera, while being positioned below the contacts, images the contacts, and the upper camera, while being positioned above the table in the recessed chamber, images the object to be tested.