Noncontact determination of transverse isotropic elastic moduli in polyimide thin films using a laser based ultrasonic method
- 18 July 1994
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 65 (3) , 312-314
- https://doi.org/10.1063/1.112356
Abstract
A transient gratinglaser ultrasonic method known as real‐time impulsive stimulated thermal scattering is used to excite and monitor Lamb acoustic waveguide modes in free‐standing thin polyimide films which are known to have transverse isotropic symmetry. The dispersion of these Lamb modes is used to accurately evaluate both the in and out‐of‐plane elastic moduli.Keywords
This publication has 34 references indexed in Scilit:
- Modeling of laser thermoelastic generation of ultrasound in an orthotropic mediumApplied Physics Letters, 1994
- Elastic properties of polymer films. 1. Elastic constants of a polyimide film determined by Brillouin scattering and mechanical techniquesMacromolecules, 1993
- Brillouin scattering by localized acoustic modes in silicon-oxynitride–fused-silica optical waveguidesJournal of Applied Physics, 1993
- Real-time optical characterization of surface acoustic modes of polyimide thin-film coatingsJournal of Applied Physics, 1992
- Laser generation and detection of surface acoustic waves: Elastic properties of surface layersJournal of Applied Physics, 1992
- Elastic constants and hardness of ion-beam-sputtered TiNx films measured by Brillouin scattering and depth-sensing indentationJournal of Applied Physics, 1991
- Optical anisotropy of polyimideJournal of Applied Polymer Science, 1990
- Characterization of crystal surfaces, thin films and superlattices by brillouin scattering from surface acoustic modesSurface and Interface Analysis, 1989
- A small‐angle X‐ray scattering study of an aromatic polyimideJournal of Polymer Science: Polymer Physics Edition, 1984
- Laser induced phonons: A probe of intermolecular interactions in molecular solidsThe Journal of Chemical Physics, 1980