An example of directional etching for nanohole arrays of less than 500nm in diameter. (Image: A*STAR Institute of Materials Research and Engineering) Wet etching can be classified into two main types ...

The project is far from complete; HomeCMOS has yet to produce a working IC but a few experiments – getting wet etching down pat and even building an almost working quantum qbit – are ...

The “-ic” suffix denotes the higher oxidation ... Source: [Kemikungen], own work (public domain). Another wet etching method often used by hobbyists is the persulfate method.