1987 Volume 20 Issue 2 Pages 146-151
For silicon CZ crystal growth, the effect of inserting a radiation shield into the furnace on the temperature profile in the melt and crystal and on the shape of the melt/crystal interface was studied theoretically by use of finite element analysis based on the conduction-dominated model.
It was found that inserting a radiation shield makes the interface shape less convex to the crystal in comparison with that without the shield except for the initial stage. Also, with use of a short radiation shield there is a possibility of obtaining a higher pull rate because the temperature gradient near the interface becomes steeper than that without the shield.
