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Modeling the Failure Mechanism of Electrical Vias Manufactured in Thick-Film Technology

Title data

Ortolino, Dominique ; Kita, Jaroslaw ; Moos, Ralf ; Wurm, Roland ; Pletsch, Andreas ; Beart, Karin:
Modeling the Failure Mechanism of Electrical Vias Manufactured in Thick-Film Technology.
Event: IMAPS/ACerS 9th International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies (CICMT 2013) , 23.-25.04.2013 , Orlando, Florida, USA.
(Conference item: Conference , Paper )

Official URL: Volltext

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Project financing: BAyerische Forschungsstiftung

Abstract in another language

Hybrid-thick-film circuits consist of many different components, like screen-printed passive elements (conductors, resistors, and electrical vias), SMDs, and active elements like transistors or ICs. Whereas most of passive components are well investigated and described, the electrical vias often remain unattended. Resistive heating caused by high current pulses might lead to the destruction of the vias. In previous work, we set up a 3d FEM model and investigated the influence of non-radial-symmetric contacting and geometric irregularities of the vias on the occurring maximum temperatures.The present contribution deals with the modeling of a failure mechanism of an electrical via caused by high current pulses. When the local temperature exceeds a defined melting temperature, the metallization layer melts and is not available for conduction any more. The current density rises as a consequence of the decreased cross section area of the vias and leads to a higher heat production in a smaller area. This conducts further melting of the metallization layer and results in a positive feedback that accelerates the destruction of the via. The approach of this contribution is to model the described failure mechanism in a 2d-radial-symmetric FEM model. The modeling results were validated using high current measurements of electrical vias. Modeling and measurement of the voltage drop during a constant current pulse agree very well, from very low current density pulses up to pulses that lead to the destruction of the vias.

Further data

Item Type: Conference item (Paper)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 18 May 2015 07:22
Last Modified: 14 Apr 2016 07:19