Photoresist Use In Semiconductor Manufacturing
Those who are a part of the electronic industry know the importance of photoresists as this light-sensitive material is used in photoengraving and photolithography to form a pattern on the membrane. The devices you love to use like mobile phones, computers, tablets etc have silicon wafer which undergoes numerous procedures before the final product is achieved and one of the processes that make it happen is photolithography in which photoresists is used. What is a photoresist? It is a light-sensitive material composed of a solvent, polymer and sensitizer which turns into a soluble material when exposed to ultraviolet light. The exposed areas are then dissolved using a solvent and thus a pattern is left behind. The primary function of photoresists is targeted towards precise pattern formation and protection of the substrate from any kind of chemical attack during etching. Photoresists can either be positive or negative. In the positive photoresists, the photochemical reaction during