Patent ID: 9684014
Date: 2017-06-20
CPC Classifications: G01R

Claim:
1. A prober, comprising: a circular plate-shaped stage, having a horizontal mounting surface that mounts thereon a substrate on which semiconductor devices are formed, configured to be rotated on a horizontal plane; a probe card provided to face the stage; and at least one roller, having a vertical rotational shaft, arranged on a circumference of the stage, wherein the at least one roller is configured to rotate the stage on the horizontal plane while being in contact with a peripheral edge of the stage, the stage is supported on a base, the stage has a recess at a central portion of a surface thereof facing the base, and the base has a protrusion at a central portion of a surface thereof facing the stage, and the protrusion is movably fitted into the recess with a clearance therebetween.