Controlled removal of a material by a chemical, plasma or physical process. etch selectivity compares removal rates for different materials; directionality compares removal rates along different geometric directions. High selectivity does not imply a vertical profile, and high directionality does not guarantee an undamaged surface.
Etching is a printmaking technique that involves using acid to carve designs into the surface of a metal plate, typically made of copper, zinc, or steel. The process generally involves the following steps: 1. **Preparation of the Plate**: The metal plate is cleaned and coated with a layer of wax or a similar material called a ground. This ground will resist acid.
New to topics? Read the docs here!