Ultraviolet light from the projection light engine through a photomask substrate on which khluea yaduai photoresist, developer, photoresist film substrate to wash the exposed parts to break.
Ultraviolet light from the light source through a photomask substrate onto which the intestine with a photoresist, then wash with substrate film photoresist developer in the sunlight will wash out.
The radiation from the light ultraviolet generator through photomask onto the substrate coated with photoresist, and bring substrate wash. Developer film photoresist in part by the light is off.