Abstract
A new vapor chamber heat sink with maximum fin efficiency is presented. The fins are hollow, so the vapor generated at the base flows up to the top of the fins. As a result, the heat sink is practically isothermal. A prototype of the hollow fin vapor chamber heat sink was built and tested. The prototype presented 20% less overall thermal resistance than conventional pin fin heat sinks with the same mass and volume. A theoretical model for the heat sink thermal resistance was developed and the agreement between the model and the experimental data is fair.
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