A Prototype Printer for Laser Driven Micro-Transfer Printing

摘要

This paper demonstrates a new mode of automated micro transfer printing called laser micro transfer printing (LμTP). As arnprocess, micro-transfer printing provides a unique and critical manufacturing route to extracting active microstructures fromrngrowth substrates and deterministically assembling them into a variety of functional substrates ranging from polymers tornglasses and ceramics and to metallic foils to support applications such as flexible, large-area electronics, concentratingrnphotovoltaics and displays. Laser transfer printing extends micro-transfer printing technology by providing a non-contactrnapproach that is insensitive to the preparation and properties of the receiving substrate. It does so by exploiting the differencernin the thermo-mechanical responses of the microstructure and transfer printing stamp materials to drive the release of thernmicrostructure or ‘ink’ from the stamp and its transfer to substrate. This paper describes the process and the physicalrnphenomena that drive it. It focuses on the use of this knowledge to design and test a print head for the process. The print headrnis used to demonstrate the new printing capabilities that LμTP enables.