Pulsed laser deposition: from basic processes to film deposition

Jorgen Schou; Bo Toftmann; Salvatore Amoruso

doi:10.1117/12.617169

22 April 2005 Pulsed laser deposition: from basic processes to film deposition (Invited Paper)

Jorgen Schou, Bo Toftmann, Salvatore Amoruso

Proceedings Volume 5830, 13th International School on Quantum Electronics: Laser Physics and Applications; (2005) https://doi.org/10.1117/12.617169
Event: 13th International School on Quantum Electronics: Laser Physics and Applications, 2004, Bourgas, Bulgaria

Abstract

The production of thin films by pulsed laser deposition (PLD) has become a standard method, even though many of the basic processes are not known in detail. The key quantitites are the ablation rate (yield) and the angular distribution of the ablated particles. The starting point for this study is the comparatively simple case of one-component metals rather than metal oxides which in the past have been comprehensively studied. The ablation rate depends primarily on the thermal properties of the metal, in such a way that a low cohesive energy leads to a high ablation rate. The angular distribution of the ablated atoms is important for the uniformity of the film thickness as well as the deposition rate on a substrate. However, if the ablation takes place in a background gas, the angular distribution of collected ablated atoms becomes comparatively broad. Combined diagnostic measurements of dposition rates and ion time-of-flight (TOF) signals have been used to study the dynamics of a laser albation plume in backgound gases. The angluar distribution and the TOF signals exhibit three separate regimes with increasing pressure, a vacuum-like regime, a transition regime with increasing plume broadening and splitting of the ion signal, and at the highest pressures a diffusion-like regime with a broad angular distribution.

Citation Download Citation

Jorgen Schou, Bo Toftmann, and Salvatore Amoruso "Pulsed laser deposition: from basic processes to film deposition (Invited Paper)", Proc. SPIE 5830, 13th International School on Quantum Electronics: Laser Physics and Applications, (22 April 2005); https://doi.org/10.1117/12.617169

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