Vật liệu tản nhiệt cho thiết bị điện tử và quản lý nhiệt tùy chỉnh

A TIM replaces thermally resistive air in the microscopic gaps between two mating surfaces. By increasing real contact area and providing a conductive path, it reduces the temperature drop between a heat-generating device and its heat sink, cold plate or enclosure.

Common families include thermal pads, grease or paste, liquid gap fillers and gels, putty, phase-change films, conductive adhesives and tapes, graphite sheets, and electrically insulating composites. Each family suits a different gap, pressure and manufacturing condition.

No. Conductivity is important, but final bond line thickness, contact resistance, pressure, area, surface condition and aging can dominate the assembled result. Thermal impedance under matched conditions and device-level testing are often more useful for final selection.

Thermal resistance expresses temperature rise per unit heat flow for a defined geometry, typically °C/W. Thermal impedance is often area-normalized and may include interface effects under specified test conditions. Always check how the supplier defines and measures the value.

For a uniform material layer, bulk resistance increases approximately in proportion to thickness. Thinner is therefore usually better when continuous contact can be maintained, but a joint that is too thin for its gap can become starved or lose coverage.

Use paste when the interface is thin, flat and controlled and very low contact resistance is needed. Use a pad when a moderate gap, tolerance, clean placement or electrical insulation is more important. The physical interface should decide the family before conductivity is compared.

Soft gap pads, liquid gap fillers, gels and thermal putty are common starting points. The best choice depends on gap range, component stress, orientation, volume control, cure needs, automation and rework.

No. Some greases, graphite products, metal-filled compounds and liquid-metal materials can conduct electricity. Even an insulating product can fail if punctured, cut incorrectly or squeezed beyond safe edge clearances. Specify and test electrical isolation explicitly.

Pump-out is driven by repeated expansion, contraction and pressure gradients that move material from the active interface. Dry-out can result from volatile loss, oxidation or matrix separation. Geometry, volume, formulation and temperature cycling all affect the risk.

There is no universal percentage. Use the product’s compression-deflection data and calculate pressure across the actual area at minimum, nominal and maximum gaps. The window must create contact without overstressing components or reaching compression stops unpredictably.

PCM is most suitable for a thin, relatively flat and continuously clamped interface that benefits from clean preformed handling and grease-like wetting after activation. It is generally not intended to fill large millimeter-scale gaps.

Yes, but these labels should be tied to an application-specific cleanliness or contamination goal. Confirm the exact test method, detection limit, conditioning and compatibility with optics, contacts, coatings, vacuum surfaces or other sensitive parts.

Record power, interface temperatures, pressure, gap and environment, then measure the initial condition and repeat through activation or cure, thermal cycling, power cycling, vibration and aging. Inspect coverage, edges and electrical isolation after teardown.

Haktak can support material screening, die-cut shapes, sheets or rolls, dispensing formats, custom formulations and prototype samples. Share the drawing, gap, power, pressure, temperature, electrical, reliability and volume requirements to begin.