Photoresist is a material that is continuously worked with. This light sensitive material has two types, positive and negative, that react very differently when exposed to UV light; therefore, it is essential to understand each reaction in order to produce the best results in the semiconductor manufacturing industry. There are two types of photoresist, positive and negative resist, which are used in different applications. In positive resist, the exposed areas are solubly, in negative resist the exposed areas are insolubly for wet chemical development.
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