Estimating current distributions in power semiconductor dies under aging conditions: Bond wire liftoff and aluminum reconstruction

Tien Anh Nguyen, Stephane Lefebvre, Pierre Yves Joubert, Denis Labrousse, Serge Bontemps

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Bond wire liftoff and metallization reconstruction are two of the most frequent failures observed during power semiconductor module operation. Aging of the top-level power dies, which occurs due to power cycling, results in the redistribution of the current in the metallization layer and the elementary cells of the power dies (MOSFET-Metal Oxide Semiconductor Field Effect Transistor, or IGBT-Insulated Gate Bipolar Transistor), leading to a risk of critical failure when either the local current density or the local temperature reaches a critical value. This paper reports on the experimental estimation of the distribution of dc flowing in the power dies and investigates the effect of the local degradation of aluminum sheet resistance and bond wire liftoff on the current distribution. The local distribution of the current flowing in the metallization layer and in the power dies was estimated by mapping the electric potential of the source metallization. The obtained results facilitate the identification of failure risks that result from the aging process (which occurs due to current redistribution) of top-level power dies and provide an understanding of the physical origins of failures.

Original languageEnglish
Article number7057669
Pages (from-to)483-495
Number of pages13
JournalIEEE Transactions on Components, Packaging and Manufacturing Technology
Volume5
Issue number4
DOIs
Publication statusPublished - 1 Apr 2015
Externally publishedYes

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Keywords

  • Aluminum reconstruction
  • bond wire liftoff
  • current distribution
  • electric potential mapping
  • modes of failure.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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