Patent ID: 6939410
Filing Date: 2005-09-06
Classification: G01N,H01L,Y10S

Abstract:
1. An apparatus for collecting impurities on a semiconductor wafer, comprising: an airtight process chamber; a rotary chuck disposed in the process chamber for horizontally supporting the semiconductor wafer thereon and for rotating the semiconductor wafer; a first scanning unit for forming a droplet of a first scanning solution and for scanning an upper surface of the semiconductor wafer rotated by the rotary chuck with the droplet of the first scanning solution to collect first impurities from the upper surface of the semiconductor wafer; a first driving unit for tilting the rotary chuck to tilt the semiconductor wafer supported on the rotary chuck; and a second scanning unit for receiving a second scanning solution in order to collect second impurities from an edge portion of the semiconductor wafer, the second scanning solution received in the second scanning unit being in contact with the edge portion of the semiconductor wafer tilted by the driving unit and rotated by the rotary chuck so that the second scanning solution scans the edge portion of the semiconductor wafer.