The different reactive ion milling techniques used for the preparation
of specimens for transmission electron microscopy are discussed. The
most important III-V and II-VI compound semiconductors can be thinned
by ion milling. In the cases of In containing semiconductors and CdTe
the iodine treatment is very efficient A simple method to prepare arte
fact free sample surfaces is shown by the examples of InP samples. Sam
ple cooling is not needed in our procedure.