Positive photoresist resin is a type of phenolic formaldehyde called a novolac resin, which constitutes the adhesion and chemical corrosion resistance of the photoresist. When dissolution inhibitor is absent, the novolac resin, which is photosensitive, dissolves in the developer. Diazonaphthoquinone (DNQ) is the most common agent in a photoactive compound.
Photoresist is the highest...
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