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V. CONCLUSIONS24-26 September 2008, Rome, ItalyThis paper evaluated different excitation modes to detectflaws and damages as well as to determine material properties.For non-destructive failure analysis the pulsed IRthermographymethod using electrical and laser excitationwas derived. The method has been shown that single failedvias are detectable clearly. Examine the electrical excitationusing vias connected in daisy chain, it could be shown thatparticular the online monitoring of the temperature risemakes a clear statement. It could also be found that the laserexcitation has a good potential for large-scale screening ofvias in PCBs in one go after manufacturing. With the nondestructivefailure methods it is now possible to have furtherexaminations analyzing online crack growth correlating withthermal simulation without expensive metallurgical crosssectioningor 3D computer tomography. For that it is nowpossible to determine more precise failure data for a reliablelifetime model. It could be shown that thermo elastic effectcan be used for localization of crack tip of a cyclic loadedCT-specimen.ACKNOWLEDGMENTThe authors appreciate the support of the EU FP 7 IntegratedProjekt “Nanopack”. The authors would also like toacknowledge the Federal Ministry of Education and Researchfor financial support (Program: Entrepreneurial Regions03IP510).REFERENCES[1] BUSSE (G.), BAUER (M.), RIPPEL (W.), and WU (D.). - Lockin vibrothermalinspection of polymer composites. QIRT´92, Editions EuropéennesThermique et Industrie, Paris, 1992 p. 154[2] J. Rantala2, D. Wu1, A. Salerno1, G. Busse1 - Lock-in thermographywith mechanical loss angle heating at ultrasonic frequencies[3] Breitenstein O. Langenkamp M. Lock-in Thermography – Basics anduse for Functional Diagnostics of Electronic Components, Springer-verlagberlin, Heidelberg 2003, ISBN 3-540-43439-9[4] Thomson, W. (Lord Kelvin): On the dynamical theory of heat. Trans.Roy. Soc. Edinburgh, 20(1853), 261-283.[5] Müller, L.; ThermoStrain-Entwicklung eines neuen Verfahrens zur Dehnungsanalysebeanspruchter Stahlbauteile; Der Andere Verlag 2005; ISBN-13: 978-3899593433©EDA Publishing/THERMINIC 2008 51ISBN: 978-2-35500-008-9