Patent ID: 9541511
Date: 2017-01-10
CPC Classifications: G01N

Claim:
1. An XRF (XRF=x-ray fluorescence) measurement apparatus comprising: a sample, wherein said sample is a wafer or an Si wafer having a bevel; an x-ray source for generating x-rays; x-ray optics elements, said x-ray optics elements being disposed, structured and dimensioned to direct x-rays from the x-ray source onto said bevel of said wafer, wherein a combination of said x-ray source and said x-ray optics elements drive generated x-rays to a brilliance of at least 5*10 an EDS (EDS=energy dispersive spectroscopy) detector for detecting fluorescent x-rays from said wafer; auxiliary x-ray optics elements for directing x-rays from said x-ray source onto said wafer; and a switching element for switching the apparatus between a first operation mode and a second operation mode, wherein, in said first operation mode, said x-ray optics elements are positioned to direct x-rays from said x-ray source onto said bevel of said wafer and, in said second operation mode, said auxiliary x-ray optics elements are positioned to direct x-rays from said x-ray source onto a flat side of said wafer, wherein said switching element comprises a first moving stage for exchanging said x-ray optics elements with said auxiliary x-ray optics elements by displacing said x-ray optics elements and said auxiliary x-ray optics elements substantially transverse to a direction of travel of the x-rays, said switching element also comprising a second moving stage for pivoting and shifting said wafer relative to a path of the x-rays when switching from said first to said second operation mode.