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        One-flow multi-step synthesis of a monomer as a precursor of thermal-conductive semiconductor packaging polymer via multi-phasic separation

        Se-Jun Yim,Ki-Won Gyak,Sanket A. Kawale,Amirreza Mottafegh,Chae-Hyeon Park,Yoonseok Ko,In Kim,Sang Soo Jee,Dong-Pyo Kim 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.123 No.-

        As semiconductor technology becomes rapidly advanced, semiconductor packaging materials demandcritical characteristics in various aspects. Besides, the development of these new epoxy mold compounds(EMC) by batch reaction process requires time-consuming experimentation and the multi-step chemistryfurther reduces the efficiency of the synthetic process. We report a one-flow multi-step process for thesynthesis of newly developed Np-C4-Np, which comprises two mesogenic units connected with a flexiblespacer, as a monomeric precursor of semiconductor packaging material. Graphical convolution neuralnetwork (GCNN), a deep learning model, predicts a common solvent for three-step reactions, therebyenabling serial esterification-deprotection-epoxidation integrated with in-situ multi-phasic separationsthat were accomplished within 76 min in flow over the long batch process (>20 h excluding separationstep). Eventually, the Np-C4-Np is synthesized rapidly with higher space–time yield compared to thebatch system, thus confirming benefits in terms of productivity. Moreover, we prevent the deteriorationof electronic circuits during the semiconductor packaging process by lowering the molding temperature(126 C) of EMC and quickly dissipating the heat generated from semiconductor chip by increasing thethermal conductivity (0.34 W m1 K1) of EMC.

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