Patent ID: 6733619
Filing Date: 2004-05-11
Classification: H01L

Abstract:
An integrated apparatus for monitoring semiconductor wafer and for process control in a semiconductor production process by means of at least two different measurements, comprising a measuring unit for performing said measurements in common predetermined sites on said wafer, at least one illumination source for illuminating said wafer, supporting means for holding, rotating and translating the wafer and a control unit connected to said measuring unit, to said supporting means and to said illumination source, wherein said measuring unit comprises at least two separate, measuring sub-units fixed relative to each other, and spatially separated along a wafer translating axis, wherein the illumination is at a normal incidence one of the measuring sub-units being an optical measuring sub-unit having an optical window through which the wafer is illuminated substantially normally to the surface thereof and comprising an autofocusing assembly.