Negative Photoresists vs. Positive Photoresists: Which is Better for Your Application?
The photoresist is a material that is constantly worked with by semiconductor suppliers. This material with light-sensitivity is divided into 2 types: negative and positive, which react very contrarily when it’s exposed to UV light; so, understanding each reaction is critical in order to produce the most astonishing results in the manufacturing industry of semiconductor. Photoresists That Are Negative: Exposure to UV light causes the chemical structure of the photoresist to polymerize, which is the inverse of positive photoresists. Negative photoresists become tremendously tough to dissolve rather than becoming more soluble. As a result, the exposed UV negative resist rests on the surface while the solution of photoresist developer removes the unexposed areas. This results in a mask with an inverse pattern of the original, which is then applied to the wafer. Photoresists That Are Positive: UV light is strategically directed at the material in the parts that the supplier of se