Transient Thermal Analysis of 3-D Integrated Circuits Packages by the DGTD Method

Ping Li, Yilin Dong, Min Tang, Junfa Mao, Li Jun Jiang, Hakan Bagci

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Since accurate thermal analysis plays a critical role in the thermal design and management of the 3-D system-level integration, in this paper, a discontinuous Galerkin time-domain (DGTD) algorithm is proposed to achieve this purpose. Such as the parabolic partial differential equation (PDE), the transient thermal equation cannot be directly solved by the DGTD method. To address this issue, the heat flux, as an auxiliary variable, is introduced to reduce the Laplace operator to a divergence operator. The resulting PDE is hyperbolic, which can be further written into a conservative form. By properly choosing the definition of the numerical flux used for the information exchange between neighboring elements, the hyperbolic thermal PDE can be solved by the DGTD together with the auxiliary differential equation. The proposed algorithm is a kind of element-level domain decomposition method, which is suitable to deal with multiscale geometries in 3-D integrated systems. To verify the accuracy and robustness of the developed DGTD algorithm, several representative examples are benchmarked.
Original languageEnglish (US)
Pages (from-to)862-871
Number of pages10
JournalIEEE Transactions on Components, Packaging and Manufacturing Technology
Volume7
Issue number6
DOIs
StatePublished - Mar 11 2017

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