Hi Peter, Two very nice review articles about different etch-rates are by Williams, K. R. J. of Micromechanincal processing 1996 vol 5 pp 256-269 and Part II by the same person 2003 same journal vol 12 pp 761. I know there are recipes to etch some or all of these metals. Not sure about selectivity towards ITO, but maybe somewhere to start. Regrds, Robert ons 2008-08-06 klockan 08:06 +0200 skrev P.E.M. Kuijpers: > Dear all, > > Can one of these metals Cr, Ti, Cu or Mo selectively be etched compared to > ITO and what kind of etchant can be used for this > > Thanks > Peter