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Pure copper is widely used in the industry as the base metal for heat transfer and electromagnetic applications, thanks to its superior electrical and thermal conductivity. Complex pure copper components have been attempted by various additive manufacture (AM) techniques. Among them, laser powder bed fusion (LPBF) is competent to print smooth curved surfaces and complex geometries due to its high resolution and powder bed support. However, the fabrication of pure copper by LPBF generally requires a laser power of more than 400 W (usually up to 1000 W) due to the high infrared laser reflection and thermal conductivity of pure copper. Therefore, the laser optics could be damaged by the back reflection of high-power laser. The LPBF with a short-wavelength laser has also been attempted but with a low resolution of 500 µm at present. In this work, a high-precision LPBF (hp-LPBF) system with small laser …