Microchannel: this is known in optics as vertical stack cooling, which is essentially invisible to the naked eye. Microchannel heatsink cooling is one of the most advanced technologies for high-power semi-conductor laser packaging, it is a kind of ultra-precision processing, each single chip has five very small waterways, an average of 0.03 mm each of the waterways, the entire laser internal densely packed waterways, so called microchannels, its heat loss per square centimeter is 100W, which is basically the bar in water packaging, so to ensure a good cooling effect