New lasers, VUV sources

Excimer laser ablation of triazene-containing polyesters with different topologies

“…The mechanism of polymer ablation [3], that governs this structuring phenomena, consists of a) absorption of the incoming light without losses by thermal diffusion, b) high population of dissociative states in the polymer matrix, c) photochemical or photothermal bond scission, d) ejection of the formed fragments out of the place of photochemical interaction. In most cases, standard polymers, such as PMMA [4] or polyimide [5], or composites with some sensitizing dopant have been investigated for this aim. It is a challenge, though, to improve the performance of this process by designing materials with respect to the above mechanism.…”