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 ...

Dry etching methods are all anisotropic processes; that is, they direct copper removal in a single direction and avoid the risk of undercutting. Wet methods, all of which rely on chemical ...

Wet etching involves the use of liquid chemical solutions to remove material from a substrate. While wet etching is generally simpler and less expensive than RIE, it has several limitations: Plasma ...

Beautiful spiral patterns had been etched into the germanium surface by a chemical reaction ... re-incubated the chip with the same etching solution in a wet chamber to prevent evaporation.

Further experiments showed that the patterns arise from chemical reactions that are ... and re-incubated the chip with the same etching solution in a wet chamber to prevent evaporation.