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Abstract
The effect of time and temperature on substrate grown thin films of 75/25 copolymer of vinylidene fluoride and trifluoroethylene is explored. The coupling coefficient and acoustic quality are measured and related to the ferroelectric to paraelectric transition. It is found that substrate growth profoundly affects the ferroelectric properties, when compared to bulk grown materials: and that film piezoelectric properties can be maximized through proper use of growth conditions.