Thermal Interface Materials for Reliable Heat Transfer
Haktak supplies thermal pads, gels, greases, adhesives and potting materials for EV batteries, power electronics, LED lighting, telecom equipment, data centers and industrial devices.
TIM Selection Snapshot
Start with the real assembly conditions, then match material format, thermal target and process window.
What Are Thermal Interface Materials?
Thermal interface materials, also called TIMs, are materials placed between a heat source and a cooling surface to reduce air gaps, lower contact resistance and improve heat transfer. Common TIM types include thermal pads, thermal gels, thermal grease, phase change materials, thermally conductive adhesives and potting compounds.
Lower thermal resistance
TIMs improve real contact between uneven surfaces and help heat move from components to heat sinks, housings, cold plates or chassis.
Protect sensitive assemblies
Soft, insulating and flexible materials can reduce mechanical stress while supporting dielectric protection and reliability.
Fit production processes
Haktak supports pads, dispensable gels, grease, adhesives and encapsulants for manual, semi-automatic and automated assembly.
Thermal Interface Material Types
The right TIM depends on gap tolerance, pressure, electrical insulation, processing method, thermal target and long-term reliability requirements.
Thermal Pads
Pre-formed sheets for predictable thickness, insulation and gap filling between components and heat sinks or housings.
Read thermal pad guideThermal Gels
Dispensable gap fillers for uneven surfaces, automated dispensing and low-stress contact in complex assemblies.
Read thermal gel guideThermal Grease
Paste-like materials for thin bond lines and low contact resistance where mechanical support is not required.
Read thermal paste guideThermally Conductive Adhesives
Bonding materials that combine heat transfer with mechanical attachment for modules, LEDs and electronics.
Read adhesive guidePotting Compounds
Encapsulation materials for heat dissipation, insulation, moisture protection and mechanical reinforcement.
Read potting guideCustom TIM Solutions
Formulation support for target conductivity, hardness, viscosity, dielectric performance, curing method and process window.
Customization supportApplications We Support
Haktak thermal materials are developed for engineers who need stable performance in compact, high-power or harsh operating environments.
- EV battery packs, BMS units, inverters and charging modules
- Power electronics, IGBT modules, MOSFETs and power supplies
- LED lighting modules, drivers and high-output fixtures
- Telecom, data center and industrial control equipment
- Semiconductor, sensor, PCB and advanced electronics assemblies
How to Choose a Thermal Interface Material
Selection should be based on the real assembly, not only the W/mK value. Contact pressure, bond line thickness, compression, surface flatness and reliability testing often determine final performance.
| Selection Factor | What to Define | Why It Matters |
|---|---|---|
| Thermal target | Thermal conductivity, thermal impedance, component temperature limit | Determines whether the material can meet the heat transfer requirement in the final assembly. |
| Gap and tolerance | Minimum, nominal and maximum gap; surface flatness; component height variation | Affects pad thickness, gel volume, grease bond line and compression range. |
| Mechanical stress | Hardness, modulus, compression force, board stiffness, component fragility | Prevents PCB bending, solder joint stress, housing deformation and long-term compression set. |
| Electrical safety | Dielectric strength, volume resistivity, insulation distance, voltage level | Critical for battery packs, power electronics, LEDs and high-voltage modules. |
| Process fit | Manual placement, die cutting, dispensing, curing method, rework need | Controls production speed, repeatability, waste and total assembly cost. |
| Reliability | Temperature cycling, humidity aging, vibration, outgassing, chemical exposure | Confirms stable thermal and mechanical performance after field-like stress. |
Material Comparison
| Material Type | Best For | Key Advantages | Common Checks |
|---|---|---|---|
| Thermal pad | Controlled gaps and electrical insulation | Clean assembly, consistent thickness, die-cut shapes | Compression ratio, hardness, thickness tolerance |
| Thermal gel | Uneven gaps and automated dispensing | Low stress, good wetting, no die cutting | Pumpability, slump, dispensing volume, aging |
| Thermal grease | Thin bond lines and low contact resistance | High wetting, thin interface, easy application | Pump-out, dry-out, rework, long-term stability |
| Thermally conductive adhesive | Bonding and heat transfer in one material | Mechanical attachment, process simplification | Adhesion, cure, thermal cycling, modulus |
| Thermally conductive potting | Encapsulation and environmental protection | Heat dissipation, insulation, moisture protection | Viscosity, exotherm, shrinkage, repairability |
Custom Thermal Material Development
When a standard product does not match the assembly, Haktak can support custom material development around target thermal, mechanical, electrical and processing requirements.
Define the assembly
Share gap, substrates, heat source, cooling surface, voltage level and operating environment.
Match key properties
Align conductivity, hardness, viscosity, dielectric performance, curing method and temperature range.
Prototype and test
Validate thermal impedance, contact, adhesion, insulation and reliability in the real product.
Support production
Optimize dispensing, die cutting, packaging, storage, process window and quality consistency.
Need Help Selecting a Thermal Interface Material?
Send your gap range, heat source, cooling surface, target temperature, insulation requirement, assembly pressure and production method. Haktak can recommend a suitable TIM or develop a custom formulation.
Thermal Interface Materials FAQ
What is the best thermal interface material?
There is no single best TIM for every design. Thermal pads, gels, grease, adhesives and potting compounds each work best under different gap, pressure, process and reliability conditions.
Is higher W/mK always better?
No. A higher thermal conductivity value does not always mean lower device temperature. Bond line thickness, contact resistance, compression, wetting and assembly pressure can have a larger effect on real performance.
When should I use a thermal pad instead of thermal grease?
Use a thermal pad when you need controlled thickness, electrical insulation, easier assembly or a larger gap. Thermal grease is better for thin interfaces with sufficient clamping pressure and low mechanical support needs.
Can thermal interface materials be electrically insulating?
Yes. Many TIMs are formulated to provide electrical insulation while conducting heat. Always confirm dielectric strength, volume resistivity and application voltage requirements.
Does Haktak support custom thermal materials?
Yes. Haktak can support custom thermal material development based on conductivity, hardness, viscosity, curing method, dielectric performance, operating temperature and process requirements.