The area of a circular wafer is calculated using the formula A = πr². In the context of wafer manufacturing, the formula A = πr² / 4 is used to account for usable area versus total area, indicating that only a quarter of the total area is typically usable due to waste during production. The discussion highlights the importance of understanding the relationship between diameter and radius, where diameter (d) is equal to twice the radius (r). This clarification is essential for accurately comparing the areas of wafers with different diameters.
PREREQUISITESStudents preparing for tests in geometry, engineers involved in wafer manufacturing, and anyone interested in optimizing material usage in circular designs.