Here we report a scalable bottom up technology for assembling hierarchical colloidal arrays with superhydrophobic surface Non close-packed (NCP) colloidal multilayers which facilitate the formation of more hydrophobic surface than close-packed arrays due to a higher fraction of entrapped air in between colloidal particles are first fabricated by a simple spin-coating technology Uniform silica nanoparticles are then assembled on the NCP microsphere arrays by a second spin-coating process After surface functionalization of silica particles with fluorosilane the resulting hierarchical colloidal arrays exhibit superhydrophobic surface with high apparent water contact angle (159 degrees) and low contact angle hysteresis (4 7 degrees) The experimental results on both the wettability and contact angle hysteresis can be qualitatively explained by adapting the Cassie s model This spin-coating-based colloidal self-assembly technology is compatible with standard microfabrication and enables large-scale production of superhydrophobic coatings that could find important technological applications ranging from self cleaning diffractive optics to microfluidic devices Published by Elsevier Inc