Silicon Wafer Processing National Chiao Tung University
Step 2 Preparing the Molten Silicon Bath The sand SiO2 is taken and put into a crucible and is heated to about 1600 degrees C just above its melting point The molten sand will become the source of the silicon that will be the wafer Step 3 Making the Ingot A pure silicon seed crystal is now placed into the molten sand bath This crystal will be pulled out slowly as it is rotated The