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        Sol-gel Mechanism of Self-Patternable PZT Film Staring from Alkoxides' Precursors

        Jae-SeobHwang,WooSikKim,Hyung-HoPark,Tae-SongKim 한국세라믹학회 2003 한국세라믹학회지 Vol.40 No.4

        Sol-gel preparation technique using a chemical reaction of metal alkoxides has been widely used for the fabrication of various materials including ceramics. However, its mechanism has been studied till now because a number of chemical ways are possible from various alkoxides and additives. In this study, the mechanism of hydrolysis, condensation, and polymerization of alkoxides were investigated from the fabrication of lead-zirconate-titanate (PbZrxTi1-xO3; PZT) thin film that is used as various micro-actuator, transducer, and sensor because of its high electro-mechanical coupling factors and thermal stability. Furthermore, the fabrication process and characteristics of self-patternable PZT film using photosensitive stabilizer were studied in order to resolve the problem of physical damage and properties degradation during dry etching for device fabrication. Using an optimum condition to prepare the self-patternable PZT film, more than 5000 thick self-patternable PZT film could be fabricated by three times coating. The PZT film showed 28.4 μC/cm2 of remnant polarization (Pr) and 37.0 kV/cm of coercive field (Ec).

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