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In computing and electronics, thermal pads (also called thermally conductive pad or thermal interface pad) are pre-formed rectangles of solid material (often paraffin wax or silicone based) commonly found on the underside of heatsinks to aid the conduction of heat away from the component being cooled (such as a CPU or another chip) and into the heatsink (usually made from aluminium or copper).
Thermally conductive pad: As opposed to previous TIMs that come in a fluidic form, thermal pads are manufactured and used in a solid state (albeit often soft). Mostly made of silicone or silicone-like material, thermal pads have the advantage of being easy to apply. They provide thicker bond lines (ranging in thickness from larger than a few ...
The exact mechanism of action of silicone gel sheeting has not been fully studied. Currently, many proposed mechanisms explain the efficacy of such treatment, including the occlusion and hydration effect, increased body surface temperature, polarized electric charge, immunological effects, etc. [9] The occlusion and hydration effect is the most studied mechanism of action.
Thermal paste consists of a polymerizable liquid matrix and large volume fractions of electrically insulating, but thermally conductive filler. Typical matrix materials are epoxies, silicones (silicone grease), urethanes, and acrylates; solvent-based systems, hot-melt adhesives, and pressure-sensitive adhesive tapes are also available.
In heat transfer, the thermal conductivity of a substance, k, is an intensive property that indicates its ability to conduct heat. For most materials, the amount of heat conducted varies (usually non-linearly) with temperature. [1] Thermal conductivity is often measured with laser flash analysis. Alternative measurements are also established.
The thermally conductive material can vary including metals, metal oxides, silica or ceramic microspheres. The latter are found in products that have much higher dielectric strength, although this comes at the cost of lower thermal conductivity. End-user modding heatsinks may be supplied with thermal adhesive attached (usually a piece of tape).