chemically amplified photoresist

Chemically amplified photoresists (CAMP) are advanced materials used in photolithography for creating integrated circuits. These are specialized resins that change their chemical properties when exposed to radiation, such as ultraviolet light or electron beams.1

A typical photoresist contains a photoactive compound (PAC) within a resin. When exposed to radiation through a mask, the PAC is converted into an acid, making the resin soluble. This allows the exposed areas to be dissolved, enabling precise chemical etching or metallic coating to form circuit patterns on semiconductor chips.1

CAMP materials enhance sensitivity through subsequent chemical reactions, meaning less radiation is needed. This is crucial as integrated circuit features shrink, requiring shorter wavelengths of light for accurate patterning. Photoresists are essential for transferring circuit designs to semiconductor chips.12