Phenomenological model for prediction of complex ablation geometries in metal films using ultrashort laser pulses

verfasst von

Oliver Suttmann, Jan Duesing, Ludger Overmeyer

Abstract

Ablation of thin metal films with laser pulses having a pulse duration shorter than the electron-phonon relaxation time, so called ultrashort laser pulses, enables melt-free patterning of arbitrary geometries. Ablation with ultrashort laser pulses is an emerging process and is currently used in the field of microelectronics for the repair of photolithography masks and in the photovoltaic industry for patterning of indium tin oxide (ITO). Another current field of investigation is the patterning of thin film strain sensors. In order to achieve the desired ablation quality, a multipulse irradiation is often required. Currently, there is no "simple" model to predict line and more complex ablation geometries created by multipulse irradiation. Within this paper, an incubation threshold is introduced to enhance an existing incubation model, which is restricted to the prediction of point ablations. The resulting phenomenological model is experimentally verified on thin NiCr films using 10 ps laser pulses. The usability of the derived model is significantly higher than other existing models due to concentrating on the relevant criterion for patterning of electronic circuits: the removal threshold as well as an easy to handle procedure to determine the model parameters, which can be determined on a machining setup in industrial conditions.

Externe Organisation(en)

Laser Zentrum Hannover e.V. (LZH)

Typ

Artikel

Journal

Journal of Laser Applications

Band

28

ISSN

1042-346X

Publikationsdatum

31.05.2016

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Atom- und Molekularphysik sowie Optik, Biomedizintechnik, Instrumentierung

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.2351/1.4944507 (Zugang: Geschlossen)