White Paper - Thermal Characterization of Complex Electronics: A Basic Primer on Structure Functions
This whitepaper describes the role of thermal transient measurement to characterize semiconductor thermal behavior. It focuses on the value measurement derived structure functions provide through interpretation of the heat flow path inside a package for use in thermal characterization, failure diagnosis, and improving simulation thermal model accuracy.
Structure functions transform thermal transient measurement results into a thermal resistance versus thermal capacitance profile, which provides detailed thermal information of each layer the heat passes through, from junction to ambient. This enables identification of the physical characteristics of layers such as die attach, base, package, heatsink, and even cooling devices such as a fan.
Thermal Transient Measurement Applications
Structure Functions: Analyzing the heat flow path from junction to ambient
Extracting information from a thermal resistance vs thermal capacitance profile
Cauer- Ladder network models and structure functions
Cumulative and Derivative Structure Functions – what can they indicate?
The Math behind converting temperature vs time into a structure function
3 Examples of using Structure Function
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