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DNQ |
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DNQ stands for diazonaphthoquinone, a light-sensitive compound that in its unexposed form interacts with a cresol/formaldehyde resin, the novolak, to make a product that is insoluble in aqueous alkaline developer solution. Generally, though, photoresists are made up of such ingredients as propylene glycol methyl ether acetate (a solvent), novolac (a phenol-formaldehyde resin), and diazonaphthoquinone (a sensitizer). nbsp;molecule (a member of the diazonaphthoquinone family) in those regions struck by light is converted into |
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