Patent ID: 6632539
Filing Date: 2003-10-14
Classification: C01G,C23C,C30B,H01L,Y10S

Abstract:
A polycrystalline thin film formed by vapor deposition on a film forming surface of a polycrystalline substrate, the thin film consisting of a composite oxide which has a pyrochlore type crystalline structure of a composition represented as either AZrO or AHfO, wherein A in the formula represents a rare earth element selected from among Y, Yb, Tm, Er, Ho, Dy, Eu, Gd, Sm, Nd, Pr, Ce and La and the grain boundary misalignment angle between the same crystal axes of different crystal grains in the polycrystalline thin film along a plane parallel to the film forming surface of the polycrystalline substrate are controlled within 30Â°.