NONCONTACT DETERMINATION OF TRANSVERSE ISOTROPIC ELASTIC-MODULI IN POLYIMIDE THIN-FILMS USING A LASER-BASED ULTRASONIC METHOD

Authors
ROGERS JA DHAR L NELSON KA
Citation
Ja. Rogers et al., NONCONTACT DETERMINATION OF TRANSVERSE ISOTROPIC ELASTIC-MODULI IN POLYIMIDE THIN-FILMS USING A LASER-BASED ULTRASONIC METHOD, Applied physics letters, 65(3), 1994, pp. 312-314
Citations number
52
Categorie Soggetti
Physics, Applied
Journal title
Applied physics letters → ACNP
ISSN journal
00036951
Volume
65
Issue
3
Year of publication
1994
Pages
312 - 314
Database
ISI
SICI code
0003-6951(1994)65:3<312:NDOTIE>2.0.ZU;2-U
Abstract
A transient grating laser ultrasonic method known as real-time impulsi ve stimulated thermal scattering is used to excite and monitor Lamb ac oustic 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.