Patent ID: 6906794

Claim:
A semiconductor wafer inspection apparatus comprising: a rotatable table on which a semiconductor wafer is held by suction; an illuminating device which illuminates at least an edge portion of the semiconductor wafer held on the rotatable table; an imaging device which captures an image of the edge portion of the semiconductor wafer by light from a surface of the edge portion when the edge portion is illuminated by the illuminating device; an image processing device which detects at least one of an edge cut line width and a crack on the surface of the edge portion by acquiring the image of the edge portion which is captured by the imaging device; and a display section which displays an image of the edge portion subjected to image processing by the image processing device; wherein the imaging device captures a continuous one-dimensional image of the edge portion of the semiconductor wafer when the rotatable table is being rotated, and the image processing device acquires the captured image of the edge portion of the semiconductor wafer as a belt-like image.