Custom pure copper and CuCrZr cold plates made by laser powder bed fusion, including green-laser LPBF for pure copper. Internal channels can follow the heat load of laser diodes, optics mounts and power modules instead of drilled or brazed paths. COPPER 3DP reviews CAD, material choice and acceptance criteria, then coordinates printing, heat treatment, CNC finishing, cleaning, and inspection such as CT review, pressure and leak testing through qualified manufacturing partners.