They make 150mm wafers in quantity, up to a couple mm thick, but I don't see why they shouldn't be about to go olive thick. Other than the slow growth, that is;

They make 150mm wafers in quantity, up to a couple mm thick, but I don't see why they shouldn't be about to go olive thick. Other than the slow growth, that is; I think it might take a couple months to grow optical grade that thick.