Chemical Etching SELECTIVE CHEMICAL ETCHING A list providing some general etch information. Specific etches of certain materials are given, along with information about what else should or should not be etched by the etchant. Some etch rates are provided. WET CHEMICAL ETCHING OF METALS AND SEMICONDUCTORS A comprehensive list of etchants for over 50 different metals, semiconductors and cleanroom materials. Some etch rates are given. KOH ETCHING Etch rates For silicon, silicon nitride, and silicon dioxide in varying concentrations and temperatures of KOH. TRANSENE Etch rates and products for semiconductor etching. All information is from Transene. Also includes links to other Chemical Etching Companies. SUBSTRATE CLEANING Directions for cleaning substrates to remove organic, oxide, and metallic contaminant