Patent ID: 9005466
Filing Date: 2015-04-14
Classification: C30B,F02D,G01L,H01L

Abstract:
1. A method for producing a single LTGA crystal from a polycrystalline starting material prepared from a mixture of La 2 O 3 , Ta 2 O 5 , Ga 2 O 3 , and Al 2 O 3 , wherein a mixture having a composition represented by y(La 2 O 3 )+(1−x−y−z)(Ta 2 O 5 )+z(Ga 2 O 3 )+x(Al 2 O 3 ) (in the formula, 0<x≦0.40/9, 3.00/9<y≦3.23/9, and 5.00/9≦z<5.50/9) is used as the polycrystalline starting material, and a single LTGA crystal is grown using the Z-axis as a crystal growth axis.