@techreport{KornhuberRoitzsch1991, author = {Ralf Kornhuber and Rainer Roitzsch}, title = {Self Adaptive Computation of the Breakdown Voltage of Planar pn-Junctions with Multistep Field Plates.}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {SC-91-02}, language = {eng}, year = {1991} }