Photoacid generators are used as components of photocurable polymer formulations and chemically amplified photoresists in microelectronics industry. In recent years, these compounds gained importance as components of various engineering materials. The review presents the classification of photoacid generators and summarizes data on photochemical processes giving photoacids. A special section is devoted to practical applications of photoacid generators and the current state of their development. The bibliography includes 118 references.

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