Unsupervised algorithms for the automatic classification of EWS maps: a comparison Di Palma, F. De Nicolao, G. Donzelli, O.M. Miraglia, G. Pavia Univ., Italy; This paper appears in: Semiconductor Manufacturing, 2005. ISSM 2005, IEEE International Symposium on Publication Date: 13-15 Sept. 2005 On page(s): 253- 256 ISSN: ISBN: 0-7803-9143-8 INSPEC Accession Number: 8624914 Digital Object Identifier: 10.1109/ISSM.2005.1513349