Mini Air Cooling Fan common heat sink technology

◇ "Mini Air Cooling Fan" There are a lot of manufacturing processes, the effect is different. One of the most common is the aluminum extrusion process (Extruded). Aluminum extrusion technology is relatively simple and suitable for mass production of the radiator.
◇ further consider the "Mini Air Cooling Fan", how to identify an extruded aluminum heat sink and cons? Here we must introduce a new concept: Pin-Fin ratio. It is one of the main criteria for testing the merits of aluminum extrusion technology. Pin-Fin effective than the larger radiator cooling area means greater.
◇ Pin means "Mini Air Cooling Fan" heat sink fins (also called cheek piece); Fin is the distance between the adjacent two fins. Pin-Fin Fin ratio is divided by Pin height (without base thickness). The higher the value thus obtained, on behalf of the more advanced aluminum extrusion technology. At present, the maximum ratio is 20. Generally this ratio can reach 15 to 17, the quality is very good heatsink. If you have a ratio of up to 18 Pin-Fin radiator, then it must be a high-end product.