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3. The crystalline structure of silicon is a diamond lattice as shown in the lecture slides. The lattice constant of silicon is known to be 5.43 angstroms (or 0.543 nm) at room temperature. Show that the atomic density of silicon in crystalline structure at 25°C is 5x10²² atoms/cm³. (5 points) 4. Sketch the placement of Ge atoms on the surface of the wafer cut in (100) plane. Calculate the number of atoms per cm² at the surface of the wafer. If the wafer is cut in (111) plane, what will be the number of atoms per cm² at the surface of the wafer? (10 points)

          3. The crystalline structure of silicon is a diamond lattice as shown in the lecture slides. The lattice constant of silicon is known to be 5.43 angstroms (or 0.543 nm) at room temperature. Show that the atomic density of silicon in crystalline structure at 25°C is 5x10²² atoms/cm³. (5 points)
4. Sketch the placement of Ge atoms on the surface of the wafer cut in (100) plane. Calculate the number of atoms per cm² at the surface of the wafer. If the wafer is cut in (111) plane, what will be the number of atoms per cm² at the surface of the wafer? (10 points)

3. The crystalline structure of silicon is a diamond lattice as shown in the lecture slides. The lattice constant of silicon is known to be 5.43 angstroms (or 0.543 nm) at room temperature. Show that the atomic density of silicon in crystalline structure at 25°C is 5x10²² atoms/cm³. (5 points)
4. Sketch the placement of Ge atoms on the surface of the wafer cut in (100) plane. Calculate the number of atoms per cm² at the surface of the wafer. If the wafer is cut in (111) plane, what will be the number of atoms per cm² at the surface of the wafer? (10 points)

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