Endurance analysis of optical master stamps for UV-replication

The fabrication of optical components based on UV-replication is spreading rapidly in the field of high volume and low cost production. Hereby, a master stamp providing optical surface quality is imprinted into a liquid polymer material which can be cured under UV-exposure. Most prominent is the fabrication of miniaturized camera objectives for mobile phone applications done on wafer level. The required lens surfaces possess high sag and aspherical shape which leads to a challenging fabrication of the master stamp which consists of an array of identical convex or concave optical surfaces. We analyze the endurance of the stamp used in a step & repeat process for the fabrication of array-like structures used as master molds for UV-replication.