Patent ID: 8471586

Claim:
A wafer prober for semiconductor inspection comprising: a tray which supports a wafer at a set position and transports the wafer to a processing position of the wafer and is installed at the processing position; one or more alignment units which position said wafer at said set position with respect to the tray; contact units arranged in number larger than that of the alignment units and performing inspection processing in contact with said wafer at said processing position; and a tray transport portion which transports said tray supporting said wafer between said alignment unit and said contact unit, said tray having at least three holes therethrough with inner diameters larger than an outer diameter of chuck pins for position adjustment of said wafer by insertion of a chuck pin into each of holes, the holes allowing movement of the chuck pins in the X, Y, Z, and θ directions, an alignment mark disposed on an upper side face of said tray for positioning said wafer, and an alignment portion disposed on the upper side face of said tray for positioning said tray itself.