Nature-Inspired Superhydrophobic/Water-Repellent Surface on PCB/Semiconductor Based on Automatic Coating Process using Functional Nanoparticles

We demonstrate a simple generic principle of constructing superhydrophobic and water-repellent surfaces, which is the biomimic of Lotus-leaf, based on automatic spray coating on PCB substrate. Using the low surface energy nanoparticles such as fluorinated silicon dioxide nanoparticles, atomized spray equipment can help to generate superhydrophobic and water-repellent surface with in large area and high-uniformity. The coating pathway can be controlled by the 3D image of the target substrate, PCB substrate in our case, and the nanoparticle coated PCB substrate can show the water-repellency without additional process such as thermal treatment due to the functional of our fluorinated silicon dioxide nanoparticle. We expect that our coating process with functional nanoparticles can increase the stability of electronic devices.