Thermal Interface Material
Dispensing thermal pastes and gels for thermal management
Thermal Interface Material
Dispensing thermal pastes and gels for thermal management
Thermal pastes and thermal gels are interface materials used to enhance thermal conductivity between components like CPUs or power electronics and their heat sinks. When used as gap-filling materials, they reduce thermal resistance and help prevent overheating. Also known as thermal greases, thermal pastes are typically thicker, while thermal gels are softer and more conformable.
These materials are formulated from a base compound, often silicone or synthetic polymers, mixed with thermally conductive fillers like metal oxides, silver, or ceramic particles. They are widely used in electronics, automotive systems, LED lighting, and medical devices.
APPLICABLE INDUSTRIES
- Semiconductors
- Consumer Electronics
- Automobile
- Aerospace
- Healthcare
COMMON MATERIALS
- Silicon-based with metal-oxide fillers (aluminum oxide, zinc oxide)
- Metal particle (silver, aluminum, or other metal particles) based
- Liquid metal (gallium or indium alloys)
- Ceramic-based (aluminum nitride, boron nitride)
COMMON SUBSTRATES
- CPUs
- GPUs
- Power electronic modules
- LED packages
INDUSTRY
INDUSTRY
FUTURE OUTLOOK
FAST FACTS
Frequently asked questions
Most commercial thermal pastes are thermally conductive but electrically insulating because they use ceramic or metal oxide fillers (e.g., aluminum oxide, zinc oxide). However, some high-performance thermal materials based on metal or liquid-metal compounds (e.g., gallium alloys, silver-based pastes) are electrically conductive, posing a risk of short circuits if they spread to surrounding components.
Material selection matters for every application, especially in advanced thermal management systems where both thermal and mechanical demands are high. While effective thermal conduction is critical, the mechanical properties of a compound, such as conformability and long-term stability, also play a major role in maintaining performance. Different thermal compounds are engineered to meet different needs, so evaluating your requirements carefully ensures the best fit for your design.
In typical consumer electronics, replacement every 2-3 years is recommended because pastes can dry out, pump out, or degrade over time, which affects their ability to conduct heat. High-quality or industrial-grade pastes may last 5-10 years, but long-life applications (automotive, aerospace) often use thermal pads or gels instead for reliability.
Yes. Applying excess material can create an overly thick layer, increasing thermal resistance rather than lowering it. It may also cause paste to spill over onto the motherboard and other integrated circuits, which can be dangerous depending on the paste’s electrical conductivity. The ideal application for optimal thermal performance is a thin, even layer that just fills microscopic air pockets.
Thermal adhesives are used when heat-generating components like heat sinks need to be secured without screws or clips. Common in manual assembly processes and space-constrained designs, they are both bonding agents and thermal interfaces. Options like adhesive thermal tape or pressure-sensitive adhesives are ideal for modest thermal requirements, offering reliable thermal transfer and a superior mechanical bond compared to pastes alone. These materials work well when reworkability is not a concern and actual physical contact with optimized material thickness is achievable.
Most commercial thermal pastes are thermally conductive but electrically insulating because they use ceramic or metal oxide fillers (e.g., aluminum oxide, zinc oxide). However, some high-performance thermal materials based on metal or liquid-metal compounds (e.g., gallium alloys, silver-based pastes) are electrically conductive, posing a risk of short circuits if they spread to surrounding components.
In typical consumer electronics, replacement every 2-3 years is recommended because pastes can dry out, pump out, or degrade over time, which affects their ability to conduct heat. High-quality or industrial-grade pastes may last 5-10 years, but long-life applications (automotive, aerospace) often use thermal pads or gels instead for reliability.
Thermal adhesives are used when heat-generating components like heat sinks need to be secured without screws or clips. Common in manual assembly processes and space-constrained designs, they are both bonding agents and thermal interfaces. Options like adhesive thermal tape or pressure-sensitive adhesives are ideal for modest thermal requirements, offering reliable thermal transfer and a superior mechanical bond compared to pastes alone. These materials work well when reworkability is not a concern and actual physical contact with optimized material thickness is achievable.
Material selection matters for every application, especially in advanced thermal management systems where both thermal and mechanical demands are high. While effective thermal conduction is critical, the mechanical properties of a compound, such as conformability and long-term stability, also play a major role in maintaining performance. Different thermal compounds are engineered to meet different needs, so evaluating your requirements carefully ensures the best fit for your design.
Yes. Applying excess material can create an overly thick layer, increasing thermal resistance rather than lowering it. It may also cause paste to spill over onto the motherboard and other integrated circuits, which can be dangerous depending on the paste’s electrical conductivity. The ideal application for optimal thermal performance is a thin, even layer that just fills microscopic air pockets.