A-Gas Electronic Materials

Photoresist is a material that semiconductor suppliers are constantly working with. This light-sensitive material is divided into two types: negative and positive, which react in very different ways when exposed to UV light . It is therefore essential to understand each reaction in order to produce the best results in the semiconductor manufacturing industry. Positive Photoresist : UV light is used to expose the resist where the fundamental material is to be detached. Contact with UV light changes the chemical structure of these resists, making them more soluble in the developer. The developer solution then washes away the exposed resist, separating the windows from the base material. The mask thus covers an accurate copy of the shape that will be left on the wafer as a stencil for further processing. Negative Photoresist : A negative photoresist works in the opposite direction. When the negative resist is exposed to UV light, it polymerises and becomes more difficult to dissol...

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 ...