Wafer edge profile measurement = WATOM
WATOM can carry out fully automatic, non-contact measurements of the edge profiles and diameter in accordance with SEMICON standards. A special feature is the system's ability to make measurements of the mark cut into the edge of the wafer to indicate the crystal orientation. Because of its high measurement accuracy of less than 1.5 µm, leading wafer manufacturers across the world use WATOM for shop-floor geometrical quality control.
Austin United States