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Porous silicon substrates - direct sale! SmartMembranes GmbH primarily manufactures & develops customer specific substrates made of macroporous silicon or porous alumina. In addition to the customer specific orders we are also processing a specific amount of silicon wafers for internal studies and process development. These wafers were characterized and separated to a standard size of 10x10 mm (also other sizes). So we can offer a variety of different nano and microstructures at a very low price for direct sale via our e-shop. Especially research institutes, universities or industrial r&d projects can benefit and order low quantities of different structures instead of expensive complete wafer batches.