Round Robin: Quantitative Lateral Resolution of PHI XPS microprobes   Quantum 2000 / Quantera SXM
  The quantitative lateral resolution is a reliable measure for the quality of an XPS microprobe equipped with a focused X-ray beam. It describes the long tail contributions of the X-ray beam intensity distribution. The knowledge of these long tail contributions is essential when judging on the origin of signals of XPS spectra recorded on small-sized features. In this round robin test the quantitative lateral resolution of 7 PHI XPS microprobes has been estimated. As expected, the quantitative lateral resolution has significantly larger values than the nominal X-ray beam diameter. The estimated values of the quantitative lateral resolution follow a trend in time: The newer the monochromator of an XPS microprobe so much the better the quantitative lateral resolution. 
U. Scheithauer, M. Kolb, G.A.M. Kip, E. Naburgh, J.H.M. Snijders
physics.ins-det