A holistic view of chip-level thermal architecture from heterogeneous stacked dice to system level in telecoms applications

Silicon Interconnect Technology (SSIT) enables superior feature integration beyond what is possible in monolithic technology with only a Moore's Law feature shrink as well as heterogeneous feature integration of disparate dice (e.g. memories, RF DAC/ADCs, optical interfaces, customer ASICs etc.). In a Telecom environment, this superior feature density enables new applications, but also presents higher thermal density to the Thermal Engineer. To properly utilize these benefits, a Thermal Engineer must take a holistic approach to thermal architecture that simultaneously addresses system goals of Cost, Performance, Weight, Size, Power and Performance. This paper will discuss the critical parameters which impact thermal architecture, followed by Challenges in Indoor and Outdoor Telecom Systems from device and system perspectives and finally will show the impact of combining network utilization and heterogeneous load in the user's environment.