Fractal description of dendrite growing during electrochemical migration

Csaba Dominkovics, István Hajdu, Gábor Harsányi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The electrochemical migration (ECM) is an important physical-chemical failure mechanism which limits the realization of fine pitch structures in the manufacturing technology of printed wiring boards (PWB). The cause of ECM is the material transport that leads to dendrite formation. Electrical shorts will grow between pads or leads in fine pitch applications. The mechanism of ECM can be described by electrochemical principles. Dendrites are treatable as a fractal phenomenon because these special formations are in accordance with the most significant criteria of the fractal theory. We have observed in pursuance of our experiment-series that there is relationship between the materials of selective surface finishes of printed wiring boards, mean time to failure (MTTF) done to the migration process and the shape and form of dendrites grown on the top of the substrates in lateral arrangement. If the result of failure analysis is shortage caused by ECM in form of dendrite structure then it is worth to examine the shape and form of dendrites. According to our conclusion the reason of failure can be found with simply and cheap methods and the most efficient protection can be applied if we apply the above-mentioned relationship.

Original languageEnglish
Title of host publicationISSE 2007 - 30th International Spring Seminar on Electronics Technology 2007; Conference Proceedings
Subtitle of host publicationEmerging Technologies for Electronics Packaging
Pages192-196
Number of pages5
DOIs
Publication statusPublished - Dec 1 2007
EventISSE 2007 - 30th International Spring Seminar on Electronics Technology 2007: Emerging Technologies for Electronics Packaging - Cluj-Napoca, Romania
Duration: May 9 2007May 13 2007

Publication series

NameISSE 2007 - 30th International Spring Seminar on Electronics Technology 2007; Conference Proceedings: Emerging Technologies for Electronics Packaging

Conference

ConferenceISSE 2007 - 30th International Spring Seminar on Electronics Technology 2007: Emerging Technologies for Electronics Packaging
CountryRomania
CityCluj-Napoca
Period5/9/075/13/07

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Dominkovics, C., Hajdu, I., & Harsányi, G. (2007). Fractal description of dendrite growing during electrochemical migration. In ISSE 2007 - 30th International Spring Seminar on Electronics Technology 2007; Conference Proceedings: Emerging Technologies for Electronics Packaging (pp. 192-196). [4432846] (ISSE 2007 - 30th International Spring Seminar on Electronics Technology 2007; Conference Proceedings: Emerging Technologies for Electronics Packaging). https://doi.org/10.1109/ISSE.2007.4432846