Transfer printing is a powerful technique for the quick and cost-effective creation of micro-structured patterns from various electronic materials. However, the production of the required stamps is often costly and time-consuming. In this study, we demonstrate how such a stamp can be custom designed and quickly made from a polyurethane-based resin by three-dimensional vat photopolymerization. A stamp featuring an array of 204 by 512 µm sized pixels was reproduced with a high dimensional accuracy of ±0.25% and successfully applied in transfer printing of a quantum dot (QD) material with electroluminescent properties. Due to the working principle of the printer used, both the stamp and the print image obtained had a characteristic yet homogeneous raster pattern. The insights gained will be useful in the additive manufacturing of tools for use in printing electronic devices.
16 December 2022 in Surface and Interface Analysis