The main issues in the thermal characterization and modeling of stacked die packages are the appropriate model generation, and the qualification of the die attach quality between the different layers of the stacked die structures. The first part of the paper gives a short introduction of stacked die packages. The next chapter describes the main issues of steady state and transient compact model generation for the thermal behavior of stacked die packages. The third large part of the paper gives an overview of the different methodologies applied today for the quality characterization of the different die attach layers, as a major indicator of the reliability of the package.

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