photoresist

Photoresist is a photosensitive material crucial in the electronics industry, particularly for manufacturing integrated circuits. It's a type of resin that changes its resistance to chemical etching when exposed to radiation, such as light or X-rays.123

During the photolithography process, a thin layer of photoresist is applied to a semiconductor wafer. A mask, containing the desired circuit pattern, is used to expose specific areas of the photoresist to radiation. After exposure, the developed photoresist can be dissolved, allowing unprotected areas of the wafer to be chemically etched or coated. This process is repeated multiple times with different masks to build complex circuits. The effectiveness of a photoresist is judged by its purity, etching resistance, resolution, contrast, and sensitivity.23