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AZ Electronic Materials was acquired by Merck KGaA, Darmstadt, Germany, a leading company for innovative and top-quality high-tech products in the pharmaceutical, chemical and life science sectors. In the United States and Canada the subsidiaries of Merck KGaA, Darmstadt, Germany operate under the umbrella brand EMD.
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AZ Photoresist Developers

Photoresist developers are used in every lithography process to create on the wafer surface the patterned image projected onto the photoresist.  The developers are typically basic aqueous solutions, formulated either with an organic amine such as TMAH, or an inorganic salt such as potassium hydroxide.
Developers are segmented by their chemical type (organic or inorganic), their normality (i.e. the strength of solution which determines the speed of development), and whether they contain surfactants.
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