Automated Growth of Si 1− x Ge x Single Crystals with Constant Axial Gradient by Czochralski Technique

This contribution presents the growth of Si 1− x Ge x crystals with constant gradient of composition for X‐ray or γ‐ray diffraction optics using automated control of the crystal shape during the growth process. The key idea is to achieve a constant concentration gradient by continuously decreasing the crystal diameter during the main crystal growth phase. For this purpose a concept has been developed for a proper planning of the radius...