Performance of Thermal Interface Materials

Area of Science:

• Materials Science
• Thermal Engineering

Background:

• Thermal interface materials (TIMs) are crucial for enhancing thermal contact efficiency.
• Evaluating TIM performance traditionally focuses on bulk thermal conductivity, often overlooking critical contact interface phenomena.

Purpose of the Study:

• To analyze the performance of thermal interface materials (TIMs).
• To define performance criteria and evaluation methods for TIMs.
• To explore material development approaches for superior TIMs.

Main Methods:

• Performance analysis centered on thermal contact conductance.
• Evaluation of TIM properties including conformability, thermal conductivity, and thin-film feasibility.
• Review of existing literature on TIM performance metrics.

Main Results:

• Thermal contact conductance is the primary performance indicator, influenced by conformability, thermal conductivity, and thin-film capability.
• Most research incorrectly focuses on TIM thermal conductivity rather than contact conductance.
• Thermal pastes and low-melting alloys demonstrate the highest performance.

Conclusions:

• Accurate TIM performance assessment requires prioritizing thermal contact conductance.
• Future TIM development should focus on materials optimizing interface conductance.
• Thermal pastes and low-melting alloys represent the current state-of-the-art in TIM performance.