Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-25T17:00:16.308Z Has data issue: false hasContentIssue false

Polytetrafluoroethylene (PTFE) films prepared by F2-laser deposition

Published online by Cambridge University Press:  21 December 2004

N. Huber
Affiliation:
Applied Physics, Johannes-Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
J. Heitz*
Affiliation:
Applied Physics, Johannes-Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
D. Bäuerle
Affiliation:
Applied Physics, Johannes-Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
Get access

Abstract

Thin films of polytetrafluoroethylene (PTFE) were prepared by pulsed-laser deposition (PLD) from bulk PTFE targets using 157 nm F2-laser radiation. The films were analyzed by means of optical polarization microscopy, stylus profilometry, XPS, XRD, FTIR spectroscopy, and by capacitance measurements. The effect of substrate temperature, Ts, on the morphology and crystallinity of the films was studied. Films treated at sufficiently high Ts consist mainly of spherulite-like crystallites. Films with a thickness of more than about 155 nm are continuous, pinhole-free, well adherent to the substrate, and have a composition which is similar to that of the target material. The minimum film thicknesses and deposition rates are much lower than those achieved with pressed PTFE powder targets using 248 nm KrF-laser ablation. This is related to the different deposition mechanisms. Film formation based on KrF-laser ablation of pressed powder targets is mainly related to the condensation of large particulates transferred in a particle jet from the target to the substrate. F2–laser ablation and film formation seems to be based on the ablation and condensation of small fragments. Correspondingly, the morphology, crystallinity, and the optical and dielectrical properties of films significantly differ from each other.

Keywords

Type
Research Article
Copyright
© EDP Sciences, 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

D. Bäuerle, Laser Processing and Chemistry, 3rd edn. (Springer, Heidelberg, 2000)
Li, S.T., Arenholz, E., Heitz, J., Bäuerle, D., Appl. Surf. Sci. 125, 17 (1998) CrossRef
Zhang, Y., Katoh, T., Endo, A., J. Phys. Chem. B 104, 6212 (2000) CrossRef
Smausz, T., Kresz, N., Hopp, B., Appl. Surf. Sci. 177, 66 (2001) CrossRef
De Wilde, W., Thin Solid Films 24, 101 (1974) CrossRef
Usui, H., Koshikawa, H., Tanaka, K., J. Vac. Sci. Technol. A 13, 2318 (1995) CrossRef
Quaranta, F., Valentini, A., Favia, P., Lambendola, R., d'Agostino, R., Appl. Phys. Lett. 63, 10 (1993) CrossRef
Holland, L., Biedermann, H., Ojha, S.M., Thin Solid Films 35, L19 (1976) CrossRef
Yoshida, A., Matsumoto, E., Yamada, H., Okada, H., Wakahara, A., Nucl. Instrum. Meth. Phys. Res. B 199, 370 (2003) CrossRef
Lau, K.K.S., Gleason, K.K., J. Phys. Chem. B 105, 2303 (2001) CrossRef
Lewis, H.G.P., Caulfield, J.A., Gleason, K.K., Langmuir 17, 7652 (2001) CrossRef
Huber, N., Gruber, J., Arnold, N., Heitz, J., Bäuerle, D., Europhys. Lett. 51, 674 (2000) CrossRef
Schwödiauer, R., Bauer-Gogonea, S., Bauer, S., Heitz, J., Arenholz, E., Bäuerle, D., Appl. Phys. Lett. 73, 2941 (1998) CrossRef
Huber, N., Heitz, J., Bäuerle, D., Schwödiauer, R., Bauer, S., Niino, H., Yabe, A., Appl. Phys. A. 72, 581 (2001) CrossRef
Huber, N., Heitz, J., Bäuerle, D., Eur. Phys. J. Appl. Phys. 25, 33 (2004) CrossRef
Küper, S., Stuke, M., Appl. Phys. Lett. 54, 4 (1989) CrossRef
Nagayama, K., Miyamae, T., Mitsumoto, R., Ishii, H., Ouchi, Y., Seki, K., J. Electron Spectrosc. 78, 407 (1996) CrossRef
Skurat, V., Nucl. Instrum. Meth. B 208, 27 (2003) CrossRef
Ueno, Y., Fujii, T., Kannari, F., Appl. Phys. Lett. 65, 1370 (1994) CrossRef
Moynihan, R.E., J. Am. Chem. Soc. 81, 1045 (1959) CrossRef
J. Brandup, Polymer Handbook, 2nd edn. (Wiley, New York, 1975)
Schwödiauer, R., Heitz, J., Arenholz, E., Bauer-Gogonea, S., Bauer, S., Wirges, W., J. Polym. Sci. B: Polym. Phys. 37, 2115 (1999) 3.0.CO;2-W>CrossRef