DEVICE FOR GROWTH OF MONOCRYSTAL FROM MELT BY CHOKHRALSKY VERTICAL PULLING TECHNIQUE

摘要

FIELD: metallurgy.SUBSTANCE: claimed device comprises crucible 2 arranged in growing chamber 1 with adjacent heater 4 and heat insulator 5, seed holder 3 and thermal hollow above-crucible cylindrical shield 6. The latter is made of low-heat-conductivity material (quartz) fitted at crucible 2 from above to allow its lower part to be immersed in the melt. Said lower part has through cutouts. Note here that each of lower edges of said cutouts represents a line shaped to Archimedean arc or logarithmic spiral.EFFECT: lower and more stable temperature gradient over crystallisation front and inside single crystal, higher quality of grown crystal.2 cl, 2 dwg