Selective etching is done using------?Question 1Answera.maskingb.metallizationc.Photolithograph

Selective etching is done using c. Photolithography.

Here are the steps:

1. Photolithography is a process used in microfabrication to pattern parts on a thin film or the bulk of a substrate. It uses light to transfer a geometric pattern from a photomask to a light-sensitive chemical photoresist on the substrate.

2. A series of chemical treatments then either engraves the exposure pattern into the material or enables deposition of a new material in the desired pattern upon the material underneath the photoresist.

3. In complex microelectronics (like CPUs and memory chips), photolithography is used because it allows for high