Information AboutHeat Sink |
| CATEGORIES ABOUT HEAT SINK | |
| computer hardware cooling | |
| passive fire protection | |
| SHOPPER'S DELIGHT | |
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A heat sink is an environment or object capable of absorbing heat from another object with which it is in thermal contact (either direct contact or radiational "contact"). In common use, it is a device made of metal brought into contact with the hot surface of an electronic component (in most cases, some kind of Thermal Interface Material is put between the heat sink and the heat source to increase thermal throughput), such as a Microprocessor Chip or a power handling Semiconductor in order to reduce its temperature through increased thermal mass and heat dissipation (primarily by Conduction and Convection and to a lesser extent by Radiation ). Heat sinks are widely used in Electronics , and have become almost essential to modern Integrated Circuits like Microprocessors , DSP s, GPU s, etc. A heat sink usually consists of a metal structure with one or more flat surfaces to ensure good thermal contact with the components to be cooled, and an array of comb or fin like protrusions to increase the surface contact with the air, and thus the rate of heat dissipation. A heat sink is often used in conjunction with a Fan in order to increase the rate of airflow over the heat sink, thus maintaining a larger temperature Gradient by replacing warmed air faster than would be by convection, this is known as a forced air system. Heat sinks are commonly made of a good thermal conductor such as Copper or Aluminum alloy. Copper is significantly more expensive than Aluminum but is also a better thermal conductor. Aluminum has the significant advantage that it can be easily formed by Extrusion , thus making complex cross-sections possible. The contact surface of a heat sink must be flat and smooth in order to ensure the best thermal contact with the object to be cooled. Sometimes a Thermally Conductive Grease is employed to ensure the best thermal contact, such greases often contain Colloidal Silver (an even better thermal conductor than copper.) Due to recent technological developments and public interest, the market for commercial heat sink cooling for CPUs has reached an all time high; many companies now compete to make the best heat sink for , Thermaltake , Aero Cool , Cooler Master , Zalman , and Swiftech . A good heat sink is vital to Overclocked computer systems because the cooler a microprocessor is, the faster it can be made to run without instability. Temporary heat sinks are sometimes used in soldering circuit boards in order to prevent the heat from damaging sensitive nearby electronics - in the simplest case, this means gripping part of a component to be soldered with a Crocodile Clip or similar. REFERENCES SEE ALSO |