Characterisation of power modules ceramic substrates for reliability aspects

S. Pietranico, S. Pommier, S. Lefebvre, Z. Khatir, S. Bontemps

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Electronic power devices used for transportation applications (automotive and avionics) experience severe temperature variations which promote their thermal fatigue and failure. For example, for power modules mounted on the engine of an aircraft, temperature variations range from -55 °C (in the worst case of storage before takeoff) to +200 °C (flight). In theses conditions failure (conchoïdal fracture) can occur in DBC substrates. The Weibull approach was used to model the brittle fracture of the ceramic layer from a natural defect. Besides, geometric singularities in the upper ceramic/copper interface are at the origin of cracks, which grow by fatigue and finally bifurcate and break the ceramic layer. With the framework of linear elastic fracture mechanics (LEFM) and using the finite element method, it was possible to analyse how a thermal loading history may modify the risk of failure of the DBC substrate and can increase the fatigue life of a power module. This result shows that the fatigue life and the reliability of power electronic devices could be optimized using a thermo-mechanical approach of the problem and suitable failure criteria.

Original languageEnglish
Pages (from-to)1260-1266
Number of pages7
JournalMicroelectronics Reliability
Volume49
Issue number9-11
DOIs
Publication statusPublished - 1 Sep 2009
Externally publishedYes

Fingerprint

Fatigue of materials
ceramics
Power electronics
fatigue life
Substrates
Thermal fatigue
Avionics
Brittle fracture
Takeoff
thermal fatigue
Fracture mechanics
avionics
takeoff
fracture mechanics
theses
Copper
Aircraft
electronics
Engines
aircraft

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Safety, Risk, Reliability and Quality
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

Cite this

Characterisation of power modules ceramic substrates for reliability aspects. / Pietranico, S.; Pommier, S.; Lefebvre, S.; Khatir, Z.; Bontemps, S.

In: Microelectronics Reliability, Vol. 49, No. 9-11, 01.09.2009, p. 1260-1266.

Research output: Contribution to journalArticle

Pietranico, S. ; Pommier, S. ; Lefebvre, S. ; Khatir, Z. ; Bontemps, S. / Characterisation of power modules ceramic substrates for reliability aspects. In: Microelectronics Reliability. 2009 ; Vol. 49, No. 9-11. pp. 1260-1266.
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