Sometimes engineers will use chemicals to clean up of the master on the photoresist or chemical substance, such as hydrogen peroxide, acetonic. 有时工程师会拔取一些化学品去纯不兴母盘上的平刻胶或化学精神,如双氧水,丙酮。
But where the light does hit the photoresist it changes chemically which lets us wash away only the photoresist that was exposed to light, selectively revealing areas of our oxide layer.
A photoresist is a light-sensitive material used in several industrial processes, such as photolithography and photoengraving, to form a patterned coating on a surface.