Crystal orientation dependence of macropore formation in n-type silicon using organic electrolytes

The crystal orientation dependence of macropore formation in n-type Si usin g aqueous electrolytes provided important information on pore formation mec hanisms. Since macropores can also be obtained in organic electrolytes (esp ecially for p-type Si), the orientation dependence for these electrolytes i s of interest and therefore was studied. The observed pore morphologies are often remarkably different from the ones observed in aqueous electrolytes under comparable conditions. The results can be understood in terms of the "current burst" model.