An investigation was made of twinning phenomena in LEC InP crystal growth. It was observed that the yield of twin-free single-crystal InP could be improved by controlling the cone angle and crystal shape of a gradually increasing diameter. Twin formation was correlated with many growth factors. The influence of ingot shape on the formation of twins could be looked as the conical angle dependent twin probability of InP crystals. Twin-free InP crystals could be grown by large cone angle over 75° to 90°.

Influence of the Cone Angle and Crystal Shape on the Formation of Twins in InP Crystals. X.Li, R.Yang, F.Yang, T.Sun, N.Sun: Physica Status Solidi C, 2012, 9[2], 165-8