photosensitive polymer
1.The photosensitive materials are always polymer, when the photochemical reaction carries out, the backbone of polymer probably can obstruct the photosensitive group, which make the reactivity ratio of the film to be low.
2.A beam of light (typically ultraviolet light from a mercury arc lamp) shines through the chromium mask, then passes through a lens that focuses the image onto a photosensitive coating of organic polymer (called the photoresist) on the surface of a silicon wafer.
