Advanced Materials

Application of the protection/deprotection strategy to the science of porous materials

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Selective protection of the porosity can be implemented in porous materials processing by using an organic polymer fill. This strategy is employed to protect ultralow-k (ULK) materials during patterning of 250-nm lines and spaces. Structures with significantly less sidewall and trench bottom damage are obtained, proving the potential of this novel approach in materials science. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.