Patent ID: 6121647
Filing Date: 2000-09-19
Classification: C23C,H01L,Y10S

Abstract:
A film structure comprising a substrate and a ferroelectric thin film formed on one surface of said substrate, whereinsaid ferroelectric thin film contains R.sub.1 which is at least one rare earth element selected from the group consisting of Pr, Nd, Eu, Tb, Dy, Ho, Yb, Y, Sm, Gd, and Er, lead, titanium, and oxygen in an atomic ratio in the range:0.8.ltoreq.(Pb+R.sub.1)/Ti.ltoreq.1.3 and0.5.ltoreq.Pb/(Pb+R.sub.1).ltoreq.0.99, has a perovskite crystal structure, and is of (001) unidirectional orientation or a mixture of (001) orientation and (100) orientation.