METHOD FOR POLING SINGLE CRYSTAL OF LINBO3

摘要

PURPOSE: To obtain single crystal of LiNbO₃ having slight warpage and strain by impressing a DC electric field to growth crystal of LiNbO₃ by Czochralski method by setting the initial side of crystal growth as a cathode and the end side as an anode. ;CONSTITUTION: The end side of crystal growth of LiNbO₃ growing crystal 1 by Z-axis pulling by Czochralski method is placed through a sintered LiNbO₃ porcelain 2b on a platinum plate 3b, a platinum plate 3a is loaded through a sintered LiNbO₃ porcelain 2a on the growing crystal 1 and a weight 4 is placed on the platinum plate. A DC electric field is impressed by setting the platinum plate 3a as a cathode and the platinum plate 3b as an anode and the growing crystal is heated to 1,150-1,190°C within 10-20 hours, maintained for 1-5 hours and annealed.;COPYRIGHT: (C)1993,JPO&Japio