A wafer is a thin, flat piece of material, often made from silicon, used in the electronics industry. It serves as the substrate for fabricating integrated circuits and other microdevices. The process of creating wafers involves slicing a larger crystal into thin discs, which are then polished to achieve a smooth surface. In the food industry, a wafer refers to a light, crisp biscuit or cookie, typically made from flour, sugar, and water. These wafers are often used in desserts, such as ice cream cones or layered cakes, and can be flavored or coated with chocolate or other toppings.