This thesis deals with the replication of v-grooves in the sub-micron range by injection moulding, injection compression moulding and variotherm injection moulding. The variotherm mould temperature was achieved by an infrared radiator. The tests were performed with PP Dow H734-52 RNA and COP Zeonor 1060R. The effects and interactions of the parameters melt temperature and injection speed as well as mould temperature and holding pressure were investigated by using two 2-factorial designs. Higher mould temperature and higher melt temperature increase the quality of replication significantly. Holding pressure leads to slightly better replication. Increasing injection speed shows a tendency towards worse results. The use of injection compression moulding slightly increases the structure replicaton. The v-grooves were replicated in a good manner when variotherm injection moulding is used. Mould temperatures at or above the glass transition temperature are necessary for full replication of v-grooves with COP. The lowest temperature for full replication of v-grooves with PP is at least 20 °C below its crystallisation temperature.