Laser ablation
The laser ablation is a technique of deposit of thin layers. It makes it possible to obtain films of better quality that those obtained with other methods of deposit like evaporation or cathode sputtering or even by the Procédé ground-freezing.
The method consists in directing a beam Laser pulsated (UV and not IR to avoid overheating material) on a target made up of material to deposit; in contact with this beam, Matière will be torn off to come to settle on the substrate placed opposite the laser impact.
The shorter the impact is, the better it is. It is one of the applications of the lasers femto seconds. Indeed, a too long impact (with 20ns the effect is marked) heating the target and creates a light evaporation, which is unfavourable.
This technique presents the disadvantage of being very directing, which forces to work with low-size samples.
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