Skived fin heat sink with heat pipes ,for cooling 3600W IGBT.Heat sink material is AL 1060, good ductility and conduction effect,The fin thickness can be generally processed 0.5-2.5 thickness, and the spacing is 4-5 times the fin thickness.he maximum length of fin is 650mm, and multiple lengths can be achieved by friction stir welding.The maximum height of fin is 135mm. If the fin is too high, the heat conduction efficiency is very low.