The microstructuring of embossing rollers offers an economic and productive production tool for molding of large-area plastic films with functional and optical properties. Due to ultraprecision diamond machining processes a wide spectrum of microstructures in combination with a high manufacturing flexibility can be produced for optical, fluidic and mechanical applications. Both, the microstructuring of embossing rollers by ultraprecision diamond machining as well as the following molding process of plastic films exhibit a high potential for innovative applications in industrial and consumer products.