Intel has a slide show on Tom’s Hardware on how Processors are made. I found it to be well done but I have to wonder if this is some sort of advertisement for Intel.
The ingot is then moved onto the slicing phase where individual silicon discs, called wafers, are sliced thin. Some ingots can stand higher than five feet. Several different diameters of ingots exist depending on the required wafer size. Today, CPUs are commonly made on 300 mm wafers.