Patent ID: 6798513
Filing Date: 2004-09-28
Classification: G01F,G01N

Abstract:
A measuring module for measuring the surface of wafers not exceeding a surface area of 450Ã—450 mm comprising: a measuring device and a measuring table, which comprises a wafer accommodation equipped with a rotation drive, wherein the measuring device comprises a measuring head fitted with a miniaturized measuring unit which is a spectrometer for measuring layer thickness and composition, an FTIR spectrometer for measuring impurities, an Ellipsometer for measuring layer thickness, a microscope for measuring lateral structures, as well as defects, a scattered light measuring device for measuring particles and other defects, or an atomic force microscope, and a spatially separate control and evaluation unit and that the measuring head is arranged to be linearly movable by means of a sliding drive, wherein the sliding drive comprises two linear motors arranged on two opposing sides of the wafer accommodation, and wherein both linear motors are connected to each other via a support extending over the wafer accommodation, on which the measuring head is arranged.