A semiconductor wafer comprising a single crystalline lattice suitable for use in the manufacture of integrated circuits, namely computer chips and dies, wherein a diameter of the wafer is greater than approximately 150 millimeters and wherein the wafer includes a first hole extending through the wafer....http://www.google.co.uk/patents/US5890269?utm_source=gb-gplus-sharePatent US5890269 - Semiconductor wafer, handling apparatus, and method
