For traditional wafer processes, you consume a great deal more feedstock than goes into the active portion of a wafer, and even then you may end up grinding awa

For traditional wafer processes, you consume a great deal more feedstock than goes into the active portion of a wafer, and even then you may end up grinding away much of the material such as in the case of backlit imaging sensors. This 'exfoliation' approach in some ways plays into the concept Elon Musk floated about SpaceX - the actual atoms in a booster are relatively simple, they just need to be arranged in the right way.