| 摘要 |
A film made of lithium niobate-lithium tantalate solid solution may be formed on a single crystal substrate having a composition of LiNb1-zTazO3 (0</=z<0.8) by liquid phase epitaxial process. The substrate is contacted with supercooled liquid phase of a melt to produce the film thereon. The melt consists mainly of Li2O3, Nb2O5, Ta2O5 and a flux. A composition of the liquid phase is within a region encompassed by a straight line K linking a point A (95, 5, 0) and a point B (95, 2, 3), a straight line G linking the point A (95, 5, 0) and a point C (60, 40,0), a straight line H linking the point C (60, 40, 0) and a point D (60, 0, 40), a straight line J linking the point B (95, 2, 3) and a point E (0, 40, 60) and a curved line I defining a composition whose saturation temperature is not more than 1200 DEG C. Each line is shown in a triangular diagram of a pseudo-ternary system of LiNbO3-LiTaO3 - a melting medium. The composition of the solid solution may preferably be LiNb1-xTaxO3 (0</=x<0.8, z<x). <IMAGE> |
