Photolithography uses light to transfer a pattern of features from a mask to a light-sensitive chemical photoresist on a semiconductor wafer. As the pattern is transferred, it is reduced in scale ...

On top of this is placed a chemical called photoresist. Flashing a pattern of light (like the grid of light and dark that's formed by a window screen) on the photoresist turns any parts exposed to ...

The process starts with the substrate being coated with a light-sensitive photoresist. A photomask, which contains the desired pattern, is then aligned above the substrate. Ultraviolet (UV) light is ...