Underetching from simple stochastic etching kinetics

Jens Christian Claussen, Jürgen Carstensen

Research output: Chapter in Book/Published conference outputChapter (peer-reviewed)peer-review


The morphological richness of electrochemical semiconductor etching is not sufficiently counterparted yet by theoretical modeling. This paper investigates a minimal version of the Current-Burst model with Aging of F\"oll and Carstensen and demonstrates for a restricted geometry that the Aging concept is essential for underetching, or cavity generation. If the influence of Aging is neglected, the dynamics reduces to a Random Etching Model similar to the Random Deposition model. This computer {\sl gedanken experiment} demonstrates that the stochastic dynamics with ageing-dependent kinetic reaction probabilities accounts for the different etching morphologies compared to those obtained in surface roughening and related systems.
Original languageEnglish
Title of host publicationPhysics and Control (PHYSCON) 2007
Place of PublicationPotsdam
Number of pages3
Publication statusPublished - 2007


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