METHOD FOR FORMING FERROELECTRIC THIN FILM

摘要

There is provided a method of forming a ferroelectric thin film of vinylidene fluoride homopolymer having crystal form I which is applicable to various substrates in relatively easy way (coating conditions, application method, etc.). The method of forming a ferroelectric thin film comprising vinylidene fluoride homopolymer comprises the step (i) for preparing a green powder of vinylidene fluoride homopolymer comprising crystal form I alone or as main component by subjecting vinylidene fluoride to radical polymerization in the presence of a radical polymerization initiator, the step (ii) for forming a thin film on a substrate surface by using vinylidene fluoride homopolymer which comprises crystal form I alone or as main component and is obtained from the green powder product of vinylidene fluoride homopolymer comprising crystal form I alone or as main component, and the step (iii) for subjecting the thin film of vinylidene fluoride homopolymer formed in the step of above (ii) to polarization. <IMAGE>