what is a wafer
From Wikipedia, the free encyclopedia. A wafer, also called a slice or substrate, is a thin slice of semiconductor material, such as a crystalline silicon, used in electronics for the fabrication of integrated circuits and in photovoltaics for conventional, wafer-based solar cells.he size of wafers for photovoltaics is 100â200 mm square and the thickness is 200â300 Î¼m. In the future, 160 Î¼m will be the standard. Electronics use wafer sizes from 100â450 mm diameter. (The largest wafers made have a diameter of 450 mm but are not yet in general use.).
In gastronomy, a wafer is a crisp, often sweet, very thin, flat, and dry biscuit, often used to decorate ice cream.Wafers can also be made into cookies with cream flavoring sandwiched between them.They frequently have a waffle surface pattern but may also be patterned with insignia of the food's manufacturer or may be patternless. Many chocolate bars, such as Kit Kat and Coffee Crisp, have wafers in them.afers can also be made into cookies with cream flavoring sandwiched between them. They frequently have a waffle surface pattern but may also be patterned with insignia of the food's manufacturer or may be patternless. Many chocolate bars, such as Kit Kat and Coffee Crisp, have wafers in them.