Heat Sink Fins

Bonded fin heat sink bonded fin and folded fin air cooled heat sinks tailored for power electronic semiconductors and assemblies.

Heat sink fins.

Single fan double fan and triple fan bonded fin heat sinks available with thermal resistance as low as 0175 c w. The heat sink thermal resistance model consists of two resistances namely the resistance in the heat sink base and the resistance in the fins. P perimeter of the fins. H air film convective coefficient a exposed surface area of the fins.

The fins are then bonded to a base with thermally conductive epoxy brazing welding or similar metallurgical bonds to create a heat sink. Aluminum heat sink heatsink module cooler fin for high power transistor semiconductor devices with 16 pieces fins 120mmx 100mm x 18mm 2 pieces 4 7 out of 5 stars 34. 99 20mm heatsink karcy 20mm x 20mm x 10mm aluminum heatsink cooling fin for raspberry pi ic chips cooling pack of 10. Folded fin stock is also found in extended liquid cold plates heat exchangers or available separately.

An advantage of folded fin heat sinks is the ability to combine aluminum and copper to tailor the performance of the heat sink to the particular application. High fin density heat sinks offer very low thermal resistance. Heat pipe is a common addition to zipper fin heat sink because the heat sink base acts as the evaporator section and the heat sink fins as the condenser section. Fins are used to increase heat transfer area and provide a cooling effect.

The heat sink base thermal resistance r b displaystyle r b can be written as follows if the source is a uniformly applied the heat sink base. Fin thickness fin height fin length fin spacing base length base width and thickness of the base plate. A simple plate fin heatsink has seven independent geometric parameters that can be varied in any design. The heat sink has a thermal conductor that carries heat away from the cpu into fins that provide a large surface area for the heat to dissipate throughout the rest of the computer thus cooling both the heat sink and processor.

However if h a p k is greater than 1 00 the fins will insulate and prevent heat flow. Both a heat sink and a radiator require airflow and therefore both have fans built in. Folded fin heat sinks. Folded fins enable higher fin densities and increased heat transfer from a single stamped sheet assembled on a base.

Inverted fins cavities open cavities are defined as the regions formed between adjacent fins and stand for the essential promoters of nucleate boiling or condensation. A variation of the straight fin heat sink is a cross cut heat sink where the straight fin heat sink is cut at regular intervals. This provides a lightweight high performance option with only a one time tooling cost for production.