倒装芯片设计电热耦合解决方案.pdf

The Way It Works • Flow of SYMMIC – SYMMIC is FEM thermal tool. – Thermal sources use tem tes • Def em tes and pre-defined ones. – ce sources around layout. – Solves for temperature of heat equation. • With MWO – Layout i ported from MWO to SYMMIC. – Create table of devices and tem tes. – Create table of Powers at devices. • Resistiv work is imported back into MWO 8/25/2021 AWR 2012 Design Forum SYMMIC – A Thermal Solver for RF A Device Tem te Power (Heat Source) Finite Element Method • Steady State • Time (Pulsed Source with Duty Cycle) Boundary Conditions Set • Adiabatic (no heat flow) • Temperature Given Symmetry Supported Single Device 8/25/2021 AWR 2012 Design Forum Solution for a Simple FET Solution of FET Tables of Temperatures The Mesh Solve Time ~ 1 Minute 8/25/2021 AWR 2012 Design Forum Layout the Circuit Layout Tem te The layout is built out of individual device tem tes 4 FET’s in MMIC layout Can simulate at each level (using approximate boundary conditions) ….But you don’t have to 8/25/2021 AWR 2012 Design Forum Can Continue Through More Levels of Hierarchy 8/25/2021 AWR 2012 Design Forum Flip Chip Solder Bump on GaAs